首页 > 最新文献

Cold Regions Science and Technology最新文献

英文 中文
A novel mechanical model for frost heave failure of concrete canal lining: Considering elastic boundaries 考虑弹性边界的混凝土渠道衬砌冻胀破坏力学模型
IF 3.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-01-15 Epub Date: 2025-10-13 DOI: 10.1016/j.coldregions.2025.104715
Pengfei He , Wenhai Zhang , Xiangbing Kong , Feng Yue , Ruige Shi , Fuping Zhang
Frost heave failure of concrete canal linings in cold regions poses a significant threat to the safe operation of water conveyance systems. This study proposes a novel mechanical model for frost heave failure based on dual-parameter elastic foundation beam theory, incorporating the non-uniform deformation behavior commonly observed in engineering practice. The interaction between foundation soil frost heave and the lining is represented by a system of springs, with the lining boundaries modeled as elastic supports. Model accuracy is validated through comparison with field measurements and prior studies. Results show that the elastic boundary more accurately captures the deformation behavior near the top and foot of the lining. Compared with elastic boundaries, simply supported conditions result in 28.05 % greater peak displacement, 29.75 % higher peak bending moment, and 49.13 % lower shear force at the top of the lining. When elastic boundaries are included, negative bending moments emerge near the lining ends. As the vertical spring stiffness increases, the peak frost heave displacement initially decreases and then rises, while the extent of the negative bending moment regime contracts. A similar non-monotonic trend is observed for peak bending moment with increasing torsional spring stiffness, accompanied by expansion of the negative moment regions at the top and foot. When the torsional stiffness becomes excessively large, the absolute value of the negative moment exceeds that of the positive moment at the boundary, leading to a shift in the critical failure location. Increasing the lining thickness from 6 cm to 14 cm results in a 48.12 % reduction in peak frost heave displacement, with the location of maximum displacement shifting 15 cm toward the center of the lining.
寒冷地区混凝土渠道衬砌冻胀破坏对输水系统的安全运行构成重大威胁。基于双参数弹性地基梁理论,结合工程实践中常见的非均匀变形特性,提出了一种新的冻胀破坏力学模型。地基土冻胀与衬砌的相互作用用弹簧系统来表示,衬砌边界用弹性支撑来模拟。通过与现场测量和前人研究的比较,验证了模型的准确性。结果表明,弹性边界更准确地反映了衬砌顶部和底部附近的变形行为。与弹性边界相比,简支条件下衬砌顶部峰值位移增大28.05%,峰值弯矩增大29.75%,剪力减小49.13%。当包含弹性边界时,衬砌两端附近出现负弯矩。随着竖向弹簧刚度的增大,峰值冻胀位移先减小后增大,负弯矩状态的范围减小。随着扭转弹簧刚度的增加,峰值弯矩也呈现出类似的非单调趋势,并伴随着顶部和底部负弯矩区域的扩大。当扭转刚度过大时,边界处的负弯矩绝对值超过正弯矩绝对值,导致临界破坏位置发生偏移。将衬砌厚度从6 cm增加到14 cm,冻胀位移峰值减小48.12%,最大位移位置向衬砌中心移动15 cm。
{"title":"A novel mechanical model for frost heave failure of concrete canal lining: Considering elastic boundaries","authors":"Pengfei He ,&nbsp;Wenhai Zhang ,&nbsp;Xiangbing Kong ,&nbsp;Feng Yue ,&nbsp;Ruige Shi ,&nbsp;Fuping Zhang","doi":"10.1016/j.coldregions.2025.104715","DOIUrl":"10.1016/j.coldregions.2025.104715","url":null,"abstract":"<div><div>Frost heave failure of concrete canal linings in cold regions poses a significant threat to the safe operation of water conveyance systems. This study proposes a novel mechanical model for frost heave failure based on dual-parameter elastic foundation beam theory, incorporating the non-uniform deformation behavior commonly observed in engineering practice. The interaction between foundation soil frost heave and the lining is represented by a system of springs, with the lining boundaries modeled as elastic supports. Model accuracy is validated through comparison with field measurements and prior studies. Results show that the elastic boundary more accurately captures the deformation behavior near the top and foot of the lining. Compared with elastic boundaries, simply supported conditions result in 28.05 % greater peak displacement, 29.75 % higher peak bending moment, and 49.13 % lower shear force at the top of the lining. When elastic boundaries are included, negative bending moments emerge near the lining ends. As the vertical spring stiffness increases, the peak frost heave displacement initially decreases and then rises, while the extent of the negative bending moment regime contracts. A similar non-monotonic trend is observed for peak bending moment with increasing torsional spring stiffness, accompanied by expansion of the negative moment regions at the top and foot. When the torsional stiffness becomes excessively large, the absolute value of the negative moment exceeds that of the positive moment at the boundary, leading to a shift in the critical failure location. Increasing the lining thickness from 6 cm to 14 cm results in a 48.12 % reduction in peak frost heave displacement, with the location of maximum displacement shifting 15 cm toward the center of the lining.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"242 ","pages":"Article 104715"},"PeriodicalIF":3.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145323611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of borehole stability in Antarctic drilling considering time-varying temperature effect 考虑时变温度效应的南极钻孔稳定性分析
IF 3.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-01-15 Epub Date: 2025-11-25 DOI: 10.1016/j.coldregions.2025.104763
Yi Wei , Yongsheng Liu , Haoran Xu , Zijun Dou , Gansheng Yang
In Antarctic air drilling, borehole stability critically depends on heat transfer between ice walls and airflow, the ice sheet temperature gradient, and air's non-isothermal flow. Effective mitigation of thermally induced borehole collapse/closure risks in Antarctic air drilling necessitates understanding the aero-thermo-mechanical (ATM) coupling effect in Antarctic air drilling systems. This paper presents a coupled ATM model, which incorporates a Helmholtz energy thermodynamic model for air and the equation of state for H2O Ice Ih revised by IAPWS (the International Association for the Properties of Water and Steam), characterizing real thermodynamic behavior and properties of air and ice. And three failure indices are modified to account for temperature sensitivity and compared with the Derradji-Aouat failure index. They are used to quantify high-strain-rate brittle failure risks from the perspective of tension, shear, and phase transition. Ice deformation under low strain rates is governed by the Maxwell model. Numerical solutions derived from U.S. RAM-2 drilling parameters via finite element methods reveal key findings: As airflow transitions from the drill hose into the annulus through a “transition zone,” it exhibits abrupt property changes. The ATM coupling effect creates localized regions along the ice wall with steep temperature gradients (ΔT ≈ 20 K) and stress fluctuations (Δσ ≈ 0.01 MPa). Extreme transitions in these regions increase closure or collapse risks, primarily due to tensile failure. Lowering the temperature of the injected air can effectively reduce tensile failure risks. This paper proposes an operational control process to achieve this.
在南极空气钻探中,钻孔稳定性主要取决于冰壁与气流之间的传热、冰盖温度梯度和空气的非等温流动。要有效降低南极空气钻井中热致井眼坍塌/闭井风险,就必须了解南极空气钻井系统中的气动-热-机械(ATM)耦合效应。本文提出了一个耦合的ATM模型,该模型结合了空气的亥姆霍兹能量热力学模型和由IAPWS(国际水和蒸汽性质协会)修订的水冰的状态方程,表征了空气和冰的真实热力学行为和性质。并对三个失效指标进行了修正,以考虑温度敏感性,并与Derradji-Aouat失效指标进行了比较。从拉伸、剪切和相变的角度对高应变率脆性破坏风险进行量化。冰在低应变速率下的变形受麦克斯韦模型控制。美国RAM-2钻井参数的数值解通过有限元方法揭示了关键发现:当气流从钻井软管通过“过渡区”进入环空时,它表现出突然的性质变化。ATM耦合效应在冰壁上形成了温度梯度较大(ΔT≈20 K)、应力波动较大(Δσ≈0.01 MPa)的局部区域。这些区域的极端过渡增加了关闭或坍塌的风险,主要是由于拉伸破坏。降低注入空气温度可有效降低拉伸失效风险。本文提出了一种操作控制流程来实现这一目标。
{"title":"Analysis of borehole stability in Antarctic drilling considering time-varying temperature effect","authors":"Yi Wei ,&nbsp;Yongsheng Liu ,&nbsp;Haoran Xu ,&nbsp;Zijun Dou ,&nbsp;Gansheng Yang","doi":"10.1016/j.coldregions.2025.104763","DOIUrl":"10.1016/j.coldregions.2025.104763","url":null,"abstract":"<div><div>In Antarctic air drilling, borehole stability critically depends on heat transfer between ice walls and airflow, the ice sheet temperature gradient, and air's non-isothermal flow. Effective mitigation of thermally induced borehole collapse/closure risks in Antarctic air drilling necessitates understanding the aero-thermo-mechanical (ATM) coupling effect in Antarctic air drilling systems. This paper presents a coupled ATM model, which incorporates a Helmholtz energy thermodynamic model for air and the equation of state for H<sub>2</sub>O Ice Ih revised by IAPWS (the International Association for the Properties of Water and Steam), characterizing real thermodynamic behavior and properties of air and ice. And three failure indices are modified to account for temperature sensitivity and compared with the Derradji-Aouat failure index. They are used to quantify high-strain-rate brittle failure risks from the perspective of tension, shear, and phase transition. Ice deformation under low strain rates is governed by the Maxwell model. Numerical solutions derived from U.S. RAM-2 drilling parameters via finite element methods reveal key findings: As airflow transitions from the drill hose into the annulus through a “transition zone,” it exhibits abrupt property changes. The ATM coupling effect creates localized regions along the ice wall with steep temperature gradients (ΔT ≈ 20 K) and stress fluctuations (Δσ ≈ 0.01 MPa). Extreme transitions in these regions increase closure or collapse risks, primarily due to tensile failure. Lowering the temperature of the injected air can effectively reduce tensile failure risks. This paper proposes an operational control process to achieve this.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"242 ","pages":"Article 104763"},"PeriodicalIF":3.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145681513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The freeze-thaw model of cementitious materials partially saturated with dissolved salts: From elastic deformation to non-uniform plastic deformation 溶盐部分饱和胶凝材料冻融模型:从弹性变形到非均匀塑性变形
IF 3.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-01-15 Epub Date: 2025-11-11 DOI: 10.1016/j.coldregions.2025.104754
Heqing Gou , Xinchun Guan
This study establishes a fully coupled thermo-hydro-mechanical model to describe the damage evolution of cementitious materials with dissolved salts under freeze-thaw conditions, from unsaturated to saturated states of water. A pore pressure calculation equation, accounting for air, is proposed based on the thermodynamic equilibrium of substances in the pores and the initial material state, and integrated into the pore elastoplastic model.The model also considers the convective diffusion of the gas phase and the permeation adsorption process of dissolved salts. The freeze-thaw process is simulated using the equilibrium method, incorporating hysteresis effects, and combined with the saturation function to quantify the uneven ice distribution due to the saturation gradient from external moisture absorption.The effectiveness of the proposed model is validated through comparisons with experimental data and the results of classical models from the literature. The discussion section demonstrates that the model effectively describes the process of moisture replacing air in pores during freeze-thaw cycles and incorporates this into the subsequent cycle. It also shows that the surface moisture saturation is significantly higher than that of the interior, which is a key factor contributing to surface frost damage in the material.
本研究建立了一个完全耦合的热-水-力学模型来描述冻融条件下含溶盐胶凝材料从非饱和状态到水饱和状态的损伤演化过程。基于孔隙中物质的热力学平衡和材料的初始状态,提出了考虑空气的孔隙压力计算方程,并将其整合到孔隙弹塑性模型中。该模型还考虑了气相的对流扩散和溶解盐的渗透吸附过程。采用平衡法模拟冻融过程,考虑了滞后效应,并结合饱和函数量化了外部吸湿饱和梯度引起的冰分布不均匀。通过与实验数据和文献中经典模型结果的比较,验证了该模型的有效性。讨论部分表明,该模型有效地描述了冻融循环期间孔隙中水分取代空气的过程,并将其纳入后续循环。表面含水率明显高于内部含水率,这是造成材料表面冻害的关键因素。
{"title":"The freeze-thaw model of cementitious materials partially saturated with dissolved salts: From elastic deformation to non-uniform plastic deformation","authors":"Heqing Gou ,&nbsp;Xinchun Guan","doi":"10.1016/j.coldregions.2025.104754","DOIUrl":"10.1016/j.coldregions.2025.104754","url":null,"abstract":"<div><div>This study establishes a fully coupled thermo-hydro-mechanical model to describe the damage evolution of cementitious materials with dissolved salts under freeze-thaw conditions, from unsaturated to saturated states of water. A pore pressure calculation equation, accounting for air, is proposed based on the thermodynamic equilibrium of substances in the pores and the initial material state, and integrated into the pore elastoplastic model.The model also considers the convective diffusion of the gas phase and the permeation adsorption process of dissolved salts. The freeze-thaw process is simulated using the equilibrium method, incorporating hysteresis effects, and combined with the saturation function to quantify the uneven ice distribution due to the saturation gradient from external moisture absorption.The effectiveness of the proposed model is validated through comparisons with experimental data and the results of classical models from the literature. The discussion section demonstrates that the model effectively describes the process of moisture replacing air in pores during freeze-thaw cycles and incorporates this into the subsequent cycle. It also shows that the surface moisture saturation is significantly higher than that of the interior, which is a key factor contributing to surface frost damage in the material.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"242 ","pages":"Article 104754"},"PeriodicalIF":3.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145614699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Coupling effects of temperature and water content on the dynamic properties of frozen red sandstone 温度和含水量对冻结红砂岩动力特性的耦合影响
IF 3.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-01-15 Epub Date: 2025-11-06 DOI: 10.1016/j.coldregions.2025.104745
Jianhua Yang , Xianming Chen , Zhiwei Ye , Chi Yao , Xiaobo Zhang , Yongli Ma , Da Liu
In cold regions, the dynamic properties of frozen rock are a key consideration for blasting engineering in rock masses. However, the coupling effects of temperature and water content on them remain poorly understood in current research. In this study, dynamic impact tests were performed on red sandstone specimens with saturated water coefficients ranging from 0.2 to 1.0 under ambient and negative temperatures, based on the improved split Hopkinson pressure bar system, by integrating a real-time sub-zero temperature control module. The temperature influence factor (TIF) has been creatively defined, establishing the relationship between the dynamic parameters of ambient-temperature rocks and cryogenic rocks, thus filling the gap where no connection existed between them. The results demonstrate that, under a fixed moisture content, both the dynamic uniaxial compressive strength (σcd) and the dynamic elastic modulus (Ed) increase with decreasing temperature. Due to the influence of the saturation coefficient on the content of ice formed by phase change of water in rock pore (weakening effect of unfrozen water at low saturation coefficients→strengthening effect of ice at moderate saturation coefficients→deterioration effect of excessive ice at high saturation coefficients), both σcd and Ed of frozen red sandstone follow a three-stage evolution pattern of first decreasing, then increasing, and finally decreasing with increasing saturation coefficients. The TIF of σcd and Ed has a positive correlation trend with the saturation coefficient. Under the tested sub-zero conditions, TIF increases approximately linearly with decreasing temperature. Additionally, the specimen's aspect ratio, strain rate, and static compressive strength all significantly affect the rate of change in TIF with temperature.
在寒冷地区,冻结岩体的动力特性是岩体爆破工程的关键考虑因素。然而,目前的研究对温度和含水量对它们的耦合效应知之甚少。本研究基于改进的分离式霍普金森压杆系统,通过集成实时零度以下温度控制模块,对饱和水系数为0.2 ~ 1.0的红砂岩试件在环境温度和负温度下进行了动态冲击试验。创造性地定义了温度影响因子(TIF),建立了常温岩石与低温岩石动态参数之间的关系,填补了两者之间没有联系的空白。结果表明:在一定含水率下,随着温度的降低,动态单轴抗压强度(σcd)和动态弹性模量(Ed)均增大;由于饱和系数对岩石孔隙中水相变冰含量的影响(低饱和系数下未冻水的弱化作用→中等饱和系数下冰的强化作用→高饱和系数下过量冰的劣化作用),冻结红砂岩的σcd和Ed均呈现先减小后增大的三阶段演化规律;最后随着饱和系数的增大而减小。σcd和Ed的TIF与饱和系数呈正相关趋势。在测试的零下条件下,TIF随温度的降低近似线性增加。此外,试样的长径比、应变率和静态抗压强度都显著影响TIF随温度的变化率。
{"title":"Coupling effects of temperature and water content on the dynamic properties of frozen red sandstone","authors":"Jianhua Yang ,&nbsp;Xianming Chen ,&nbsp;Zhiwei Ye ,&nbsp;Chi Yao ,&nbsp;Xiaobo Zhang ,&nbsp;Yongli Ma ,&nbsp;Da Liu","doi":"10.1016/j.coldregions.2025.104745","DOIUrl":"10.1016/j.coldregions.2025.104745","url":null,"abstract":"<div><div>In cold regions, the dynamic properties of frozen rock are a key consideration for blasting engineering in rock masses. However, the coupling effects of temperature and water content on them remain poorly understood in current research. In this study, dynamic impact tests were performed on red sandstone specimens with saturated water coefficients ranging from 0.2 to 1.0 under ambient and negative temperatures, based on the improved split Hopkinson pressure bar system, by integrating a real-time sub-zero temperature control module. The temperature influence factor (TIF) has been creatively defined, establishing the relationship between the dynamic parameters of ambient-temperature rocks and cryogenic rocks, thus filling the gap where no connection existed between them. The results demonstrate that, under a fixed moisture content, both the dynamic uniaxial compressive strength (<em>σ</em><sub>cd</sub>) and the dynamic elastic modulus (<em>E</em><sub>d</sub>) increase with decreasing temperature. Due to the influence of the saturation coefficient on the content of ice formed by phase change of water in rock pore (weakening effect of unfrozen water at low saturation coefficients→strengthening effect of ice at moderate saturation coefficients→deterioration effect of excessive ice at high saturation coefficients), both <em>σ</em><sub>cd</sub> and <em>E</em><sub>d</sub> of frozen red sandstone follow a three-stage evolution pattern of first decreasing, then increasing, and finally decreasing with increasing saturation coefficients. The TIF of <em>σ</em><sub>cd</sub> and <em>E</em><sub>d</sub> has a positive correlation trend with the saturation coefficient. Under the tested sub-zero conditions, TIF increases approximately linearly with decreasing temperature. Additionally, the specimen's aspect ratio, strain rate, and static compressive strength all significantly affect the rate of change in TIF with temperature.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"242 ","pages":"Article 104745"},"PeriodicalIF":3.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145517253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Barrier effects and micro-mechanisms of geotextile layers on water-salt migration in saline soils under freeze-thaw cycles 土工布层对冻融循环下盐渍土水盐迁移的阻隔效应及微观机制
IF 3.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-01-15 Epub Date: 2025-11-19 DOI: 10.1016/j.coldregions.2025.104759
Junli Gao, Panwei Ren, Feiyu Liu, Zili Dai, Chang Chen
Saline soils in cold and arid regions are highly vulnerable to water-salt migration, frost heave, and salt heave under freeze-thaw cycles, posing significant threats to subgrade stability. This study investigated the barrier effects of geotextile layers on water–salt migration through soil column tests with varying geotextile types and initial salt contents. Temperature, water content, electrical conductivity, and microstructure were comprehensively analyzed. Results indicate that geotextile layers effectively delayed the downward movement of the freezing front and suppressed upward migration of water and salt by forming thermal resistance and capillary barriers. Among the tested materials, the polypropylene geotextile with 200 g/m2 unit area (PP2) showed the strongest barrier performance, reducing surface salt content by 66.7 % owing to its lower permeability and stronger hydrophobicity. Water-salt migration was most intense when the initial salt content ranged from 3.22 % to 3.60 %, suggesting that single-layer barriers in this range carry a high risk and require reinforcement measures to mitigate subgrade damage. Microstructural observations further confirmed that PP2 effectively restricted crack development and preserved pore stability under freeze-thaw cycles. These findings provide a theoretical foundation for optimizing the selection and structural design of barrier materials in saline soil subgrades in cold and arid regions.
寒区和干旱区盐渍土在冻融循环下极易发生水盐迁移、冻胀和盐胀,对路基稳定性构成重大威胁。通过不同土工布类型和初始含盐量的土柱试验,研究了土工布层对水盐迁移的阻隔作用。对温度、含水量、电导率和微观结构进行了综合分析。结果表明,土工布层通过形成热阻和毛细阻隔,有效延缓冻结锋向下移动,抑制水盐向上运移。在测试材料中,200 g/m2单位面积(PP2)的聚丙烯土工布的阻隔性能最强,由于其较低的渗透性和较强的疏水性,使表面盐含量降低了66.7%。当初始含盐量在3.22% ~ 3.60%之间时,水盐迁移最为强烈,表明该范围内的单层屏障存在较高的风险,需要采取加固措施来减轻路基破坏。微观结构观察进一步证实了PP2在冻融循环下有效地限制了裂缝的发展,保持了孔隙的稳定性。研究结果为寒旱区盐渍土路基屏障材料的优化选择和结构设计提供了理论依据。
{"title":"Barrier effects and micro-mechanisms of geotextile layers on water-salt migration in saline soils under freeze-thaw cycles","authors":"Junli Gao,&nbsp;Panwei Ren,&nbsp;Feiyu Liu,&nbsp;Zili Dai,&nbsp;Chang Chen","doi":"10.1016/j.coldregions.2025.104759","DOIUrl":"10.1016/j.coldregions.2025.104759","url":null,"abstract":"<div><div>Saline soils in cold and arid regions are highly vulnerable to water-salt migration, frost heave, and salt heave under freeze-thaw cycles, posing significant threats to subgrade stability. This study investigated the barrier effects of geotextile layers on water–salt migration through soil column tests with varying geotextile types and initial salt contents. Temperature, water content, electrical conductivity, and microstructure were comprehensively analyzed. Results indicate that geotextile layers effectively delayed the downward movement of the freezing front and suppressed upward migration of water and salt by forming thermal resistance and capillary barriers. Among the tested materials, the polypropylene geotextile with 200 g/m<sup>2</sup> unit area (PP2) showed the strongest barrier performance, reducing surface salt content by 66.7 % owing to its lower permeability and stronger hydrophobicity. Water-salt migration was most intense when the initial salt content ranged from 3.22 % to 3.60 %, suggesting that single-layer barriers in this range carry a high risk and require reinforcement measures to mitigate subgrade damage. Microstructural observations further confirmed that PP2 effectively restricted crack development and preserved pore stability under freeze-thaw cycles. These findings provide a theoretical foundation for optimizing the selection and structural design of barrier materials in saline soil subgrades in cold and arid regions.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"242 ","pages":"Article 104759"},"PeriodicalIF":3.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145576640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experiment on ductile to brittle transition behavior of compacted Antarctic snow under uniaxial compression 南极压实雪单轴压缩韧脆性转变特性试验
IF 3.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-01-15 Epub Date: 2025-11-20 DOI: 10.1016/j.coldregions.2025.104757
Enzhao Xiao , Shengquan Li , Hao Wang , Biao Hu , Xueyuan Tang , Bo Sun , Fan Zhang , Yihe Wang
As a crucial infrastructure for Antarctic logistics support system, snow runways are constructed using compacted Antarctic snow. Therefore, analyzing the mechanical properties and failure mechanisms of compacted Antarctic snow is essential for ensuring safe operation of snow runways. Previous studies conducted uniaxial compression tests on non-Antarctic snow, revealing that the mechanical behavior of snow was influenced by factors such as density, temperature and loading rate. In particular, loading rate significantly altered the failure mode of snow: low loading rates led to ductile failure, while high loading rates resulted in brittle failure. Although previous research has explored the effect of loading rate on the failure mode of snow, the ductile to brittle transition behavior of compacted Antarctic snow utilized in snow runway construction in Antarctica, as well as the corresponding sintering time effect have rarely been studied. This paper replicated the construction process of Antarctic snow runways in sample preparation, i.e., the procedure of crushing, sieving, compacting, and sintering of the natural Antarctic snow was followed. Uniaxial compression tests were then employed to investigate the effects of different loading rates, densities, and sintering times on the failure process of compacted Antarctic snow. The results indicated that under identical density and loading rate conditions, extending the sintering time from 3 to 18 h resulted in a 1–39 % strength increase, while prolongation to 48 h achieved a further 9–53 % improvement over the 18-h samples. When maintaining identical sintering time and loading rate conditions, increasing the snow density from 0.5 to 0.6 g/cm3 led to a significant strength increase (125–218 %). It was worth noting that under the same sintering time and density, as the compression rate increased from 1 × 10−4 s−1 to 1 × 10−2 s−1, the compressive strength of the snow samples decreased monotonically, which was different from previous studies utilizing non-Antarctic snow. Additionally, both the longitudinal and transverse deformation of the snow samples became more pronounced as the loading rate decreased, especially at low loading rates (1 × 10−4 s−1 and 5 × 10−4 s−1). This study facilitates the advancement of construction techniques and enhances operational safety for Antarctic snow runways.
冰雪跑道是南极后勤保障系统的重要基础设施,是利用南极冰雪夯实材料建设的。因此,分析南极冰雪压实的力学特性和破坏机理,对于保证冰雪跑道的安全运行至关重要。以往的研究对非南极积雪进行了单轴压缩试验,发现积雪的力学行为受到密度、温度和加载速率等因素的影响。特别是加载速率显著改变了雪的破坏模式:低加载速率导致延性破坏,高加载速率导致脆性破坏。虽然已有研究探讨了加载速率对积雪破坏模式的影响,但南极冰雪跑道建设中使用的压实南极雪的延性向脆性转变行为以及相应的烧结时间效应研究较少。本文复制了南极雪跑道在制样中的施工过程,即遵循南极天然雪的破碎、过筛、压实、烧结过程。采用单轴压缩试验研究了不同加载速率、密度和烧结时间对南极冰雪压实破坏过程的影响。结果表明,在相同密度和加载速率条件下,将烧结时间从3延长至18 h,强度提高1 - 39%;将烧结时间延长至48 h,强度比18 h提高9 - 53%。在保持相同的烧结时间和加载速率条件下,将积雪密度从0.5 g/cm3增加到0.6 g/cm3,强度显著提高(125 - 218%)。值得注意的是,在相同烧结时间和密度下,随着压缩率从1 × 10−4 s−1增加到1 × 10−2 s−1,雪样的抗压强度单调降低,这与以往利用非南极雪的研究不同。此外,随着加载速率的降低,雪样的纵向和横向变形更加明显,特别是在低加载速率(1 × 10−4 s−1和5 × 10−4 s−1)下。本研究促进了南极雪地跑道建设技术的进步和运行安全性的提高。
{"title":"Experiment on ductile to brittle transition behavior of compacted Antarctic snow under uniaxial compression","authors":"Enzhao Xiao ,&nbsp;Shengquan Li ,&nbsp;Hao Wang ,&nbsp;Biao Hu ,&nbsp;Xueyuan Tang ,&nbsp;Bo Sun ,&nbsp;Fan Zhang ,&nbsp;Yihe Wang","doi":"10.1016/j.coldregions.2025.104757","DOIUrl":"10.1016/j.coldregions.2025.104757","url":null,"abstract":"<div><div>As a crucial infrastructure for Antarctic logistics support system, snow runways are constructed using compacted Antarctic snow. Therefore, analyzing the mechanical properties and failure mechanisms of compacted Antarctic snow is essential for ensuring safe operation of snow runways. Previous studies conducted uniaxial compression tests on non-Antarctic snow, revealing that the mechanical behavior of snow was influenced by factors such as density, temperature and loading rate. In particular, loading rate significantly altered the failure mode of snow: low loading rates led to ductile failure, while high loading rates resulted in brittle failure. Although previous research has explored the effect of loading rate on the failure mode of snow, the ductile to brittle transition behavior of compacted Antarctic snow utilized in snow runway construction in Antarctica, as well as the corresponding sintering time effect have rarely been studied. This paper replicated the construction process of Antarctic snow runways in sample preparation, i.e., the procedure of crushing, sieving, compacting, and sintering of the natural Antarctic snow was followed. Uniaxial compression tests were then employed to investigate the effects of different loading rates, densities, and sintering times on the failure process of compacted Antarctic snow. The results indicated that under identical density and loading rate conditions, extending the sintering time from 3 to 18 h resulted in a 1–39 % strength increase, while prolongation to 48 h achieved a further 9–53 % improvement over the 18-h samples. When maintaining identical sintering time and loading rate conditions, increasing the snow density from 0.5 to 0.6 g/cm<sup>3</sup> led to a significant strength increase (125–218 %). It was worth noting that under the same sintering time and density, as the compression rate increased from 1 × 10<sup>−4</sup> s<sup>−1</sup> to 1 × 10<sup>−2</sup> s<sup>−1</sup>, the compressive strength of the snow samples decreased monotonically, which was different from previous studies utilizing non-Antarctic snow. Additionally, both the longitudinal and transverse deformation of the snow samples became more pronounced as the loading rate decreased, especially at low loading rates (1 × 10<sup>−4</sup> s<sup>−1</sup> and 5 × 10<sup>−4</sup> s<sup>−1</sup>). This study facilitates the advancement of construction techniques and enhances operational safety for Antarctic snow runways.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"242 ","pages":"Article 104757"},"PeriodicalIF":3.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145681511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of structural characteristics on the mechanical behavior and failure mechanisms of frozen clay 结构特性对冻结粘土力学行为及破坏机制的影响
IF 3.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-01-15 Epub Date: 2025-10-28 DOI: 10.1016/j.coldregions.2025.104736
Sheng Shi , Guanfu Wang , Decheng Feng , Feng Zhang
The strength and deformation properties of frozen soil are significant indicators to evaluate the stability and safety of infrastructures during construction and operation in cold regions. The distinctive nature and complexity of frozen soil are mainly reflected in its sensitivity to temperature changes and its inherent structural deformation features. This research focuses on the influence of frozen clay structural characteristics on its mechanical and deformation characteristics, and the mechanical behaviors of frozen clay with different structures were studied using a GDS triaxial test system. The influences of structural features and stress levels on its mechanical properties were analyzed, and the effect of confining pressure on its mechanical parameters was investigated. The variations in cracking strength and dilatancy strength of frozen clay with different structures under various confining pressure were analyzed. Finally, the mechanical properties of frozen clay with different structures were investigated using COMSOL, and the failure mechanisms were revealed.
冻土的强度和变形特性是评价寒区基础设施建设和运行过程中稳定性和安全性的重要指标。冻土的独特性和复杂性主要体现在其对温度变化的敏感性和其固有的结构变形特征上。研究了冻结粘土结构特性对其力学和变形特性的影响,采用GDS三轴试验系统研究了不同结构冻结粘土的力学行为。分析了结构特征和应力水平对其力学性能的影响,研究了围压对其力学参数的影响。分析了不同结构冻结粘土在不同围压作用下的抗裂强度和抗剪强度变化规律。最后,利用COMSOL软件对不同结构冻结粘土的力学性能进行了研究,揭示了其破坏机理。
{"title":"Influence of structural characteristics on the mechanical behavior and failure mechanisms of frozen clay","authors":"Sheng Shi ,&nbsp;Guanfu Wang ,&nbsp;Decheng Feng ,&nbsp;Feng Zhang","doi":"10.1016/j.coldregions.2025.104736","DOIUrl":"10.1016/j.coldregions.2025.104736","url":null,"abstract":"<div><div>The strength and deformation properties of frozen soil are significant indicators to evaluate the stability and safety of infrastructures during construction and operation in cold regions. The distinctive nature and complexity of frozen soil are mainly reflected in its sensitivity to temperature changes and its inherent structural deformation features. This research focuses on the influence of frozen clay structural characteristics on its mechanical and deformation characteristics, and the mechanical behaviors of frozen clay with different structures were studied using a GDS triaxial test system. The influences of structural features and stress levels on its mechanical properties were analyzed, and the effect of confining pressure on its mechanical parameters was investigated. The variations in cracking strength and dilatancy strength of frozen clay with different structures under various confining pressure were analyzed. Finally, the mechanical properties of frozen clay with different structures were investigated using COMSOL, and the failure mechanisms were revealed.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"242 ","pages":"Article 104736"},"PeriodicalIF":3.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145414212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sustainable utilization of steel slags as road abrasives for ice melting application 钢渣作为融冰用道路磨料的可持续利用
IF 3.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-01-15 Epub Date: 2025-11-28 DOI: 10.1016/j.coldregions.2025.104773
Saken Sandybay , Islam Orynbassarov , Chang-Seon Shon , Dichuan Zhang , Jong Ryeol Kim , Chul-Woo Chung
Abrasives are essential for surface treatment in cold climates, where snow and ice pose significant challenges to transportation infrastructure and road safety. This study addresses the growing need for effective, sustainable winter road maintenance (WRM) methods by exploring basic oxygen furnace slag (BOFS) as an alternative abrasive for ice-melting applications. Fresh and stockpiled (aged) BOFSs were first evaluated for their physical and mechanical properties, including abrasive angularity, absorption capacity, and thermal capacity, to assess their potential for improved surface treatment for ice melting. Then, BOFS was combined with deicing salts, such as sodium chloride (NaCl) and calcium chloride (CaCl₂) to form a blended ice-melting agent for winter maintenance. A series of laboratory tests was conducted to evaluate ice-melting performance using a petri dish and polishing ice-melting tests, as well as to examine surface temperature and clogging effects after abrasive application under controlled conditions. The experimental results show that both BOFS demonstrated good ice-melting efficiency and had higher heat and water absorption capacities than natural abrasives. For instance, slag-based abrasives show approximately 30–40 % higher ice-melting efficiency than river sand and exhibit a 2–3 °C higher temperature rise under sunlight exposure. The findings of this study highlight the potential of BOFS not only as a viable abrasive material but also as a way to reduce environmental impacts associated with traditional practices that use natural sand. This research lays the groundwork for adopting slag as a sustainable alternative to conventional WRM abrasives, balancing performance, cost, and environmental considerations.
在寒冷气候下,冰雪对交通基础设施和道路安全构成重大挑战,磨料对于表面处理至关重要。本研究通过探索碱性氧炉渣(BOFS)作为融冰应用的替代磨料,解决了对有效、可持续的冬季道路养护(WRM)方法日益增长的需求。首先评估了新鲜和储存(陈化)bofs的物理和机械性能,包括磨料角度、吸收能力和热容量,以评估其改善冰融化表面处理的潜力。然后,将BOFS与除冰盐(如氯化钠(NaCl)和氯化钙(cacl2))混合,形成混合融冰剂,用于冬季维护。研究人员进行了一系列实验室测试,利用培养皿和抛光融冰测试来评估冰的融化性能,并在受控条件下检查磨料应用后的表面温度和堵塞效果。实验结果表明,两种BOFS均具有较好的融冰效率和吸热吸水性。例如,渣基磨料的融冰效率比河砂高约30 - 40%,在阳光照射下温度升高2-3°C。这项研究的结果强调了BOFS的潜力,它不仅是一种可行的磨料材料,而且是一种减少使用天然砂的传统做法对环境影响的方法。这项研究为采用矿渣作为传统WRM磨料的可持续替代品,平衡性能,成本和环境考虑奠定了基础。
{"title":"Sustainable utilization of steel slags as road abrasives for ice melting application","authors":"Saken Sandybay ,&nbsp;Islam Orynbassarov ,&nbsp;Chang-Seon Shon ,&nbsp;Dichuan Zhang ,&nbsp;Jong Ryeol Kim ,&nbsp;Chul-Woo Chung","doi":"10.1016/j.coldregions.2025.104773","DOIUrl":"10.1016/j.coldregions.2025.104773","url":null,"abstract":"<div><div>Abrasives are essential for surface treatment in cold climates, where snow and ice pose significant challenges to transportation infrastructure and road safety. This study addresses the growing need for effective, sustainable winter road maintenance (WRM) methods by exploring basic oxygen furnace slag (BOFS) as an alternative abrasive for ice-melting applications. Fresh and stockpiled (aged) BOFSs were first evaluated for their physical and mechanical properties, including abrasive angularity, absorption capacity, and thermal capacity, to assess their potential for improved surface treatment for ice melting. Then, BOFS was combined with deicing salts, such as sodium chloride (NaCl) and calcium chloride (CaCl₂) to form a blended ice-melting agent for winter maintenance. A series of laboratory tests was conducted to evaluate ice-melting performance using a petri dish and polishing ice-melting tests, as well as to examine surface temperature and clogging effects after abrasive application under controlled conditions. The experimental results show that both BOFS demonstrated good ice-melting efficiency and had higher heat and water absorption capacities than natural abrasives. For instance, slag-based abrasives show approximately 30–40 % higher ice-melting efficiency than river sand and exhibit a 2–3 °C higher temperature rise under sunlight exposure. The findings of this study highlight the potential of BOFS not only as a viable abrasive material but also as a way to reduce environmental impacts associated with traditional practices that use natural sand. This research lays the groundwork for adopting slag as a sustainable alternative to conventional WRM abrasives, balancing performance, cost, and environmental considerations.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"242 ","pages":"Article 104773"},"PeriodicalIF":3.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145681395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multifractal characteristics of slate pore structure based on nuclear magnetic resonance in cold region 寒区板岩孔隙结构核磁共振多重分形特征
IF 3.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-01-15 Epub Date: 2025-10-25 DOI: 10.1016/j.coldregions.2025.104733
Li Yin , Daguo Wang , Jianguo Lu , Jiajian Jin , Jiajia Gao , Yun Liu
The physical and mechanical properties of rocks in high-altitude cold regions are prone to degradation, often leading to severe geological disasters. In this study, combining nuclear magnetic resonance (NMR), uniaxial compression strength (UCS) tests and fractal theory, freeze-thaw (FT) cycle experiments under multiple environmental conditions including freeze-thaw in air (FT-A), water (FT-W) and alternating dry-wet cycle (DW-FT) were conducted for 0, 5, 10, 15, 20, 25, 30, 35, and 40 cycles. The temperature ranged from −15 °C to 20 °C. DW cycles included drying for 12.0 h at 105 °C, and then immersing in water for 12.0 h. NMR was employed to quantify pore size distributions by transverse relaxation time (T₂) spectra, providing the probability density dataset essential for multifractal analysis. The findings indicated that the porosity of slate significantly raised with number of freeze-thaw (FT) cycles, with more pronounced increase observed under FT-W or DW-FT conditions. Although the DW cycles had a relatively limited influence on porosity, they resulted in a noteworthy reduction in the mechanical properties of the slate. Additionally, the mesopores and macropores of slate exhibited monofractal characteristics. The fractal dimension of mesopores (Db) positively correlated as the FT cycles, whereas the opposite results occurred for fractal dimension of macropores (Dc). Furthermore, multifractal parameters (ΔD, Δα) were employed to provide quantitative characterization of the heterogeneity characteristics within micropores and macropores. Generally, the pore heterogeneity increased with FT cycles, with macropores contributing significantly to the heterogeneity of pore structure. Moreover, the mechanical strength of slate under FT cycles was negatively correlated with both the pore heterogeneity parameter and Hurst index (H). In contrast, the mechanical properties of slate under DW conditions showed no significant correlation with the pore heterogeneity parameter. The results demonstrated the applicability of multifractal theory in characterizing the pore structure of slate. Furthermore, it provided a novel perspective on the connection between the microstructure characteristics and macroscopic properties of rocks exposed to FT cycles.
高海拔寒区岩石的物理力学性质容易退化,往往导致严重的地质灾害。本研究结合核磁共振(NMR)、单轴抗压强度(UCS)试验和分形理论,在空气(FT- a)、水(FT- w)和干湿交替循环(DW-FT)等多种环境条件下进行了0、5、10、15、20、25、30、35和40个循环的冻融(FT)循环试验。温度范围:- 15℃~ 20℃。DW循环包括在105°C下干燥12.0 h,然后在水中浸泡12.0 h。利用核磁共振通过横向弛豫时间(T₂)谱来量化孔径分布,为多重分形分析提供必要的概率密度数据。结果表明:随着冻融循环次数的增加,板岩孔隙度显著升高,其中冻融-冻融和dw -冻融条件下孔隙度增加更为明显;虽然DW旋回对孔隙度的影响相对有限,但却显著降低了板岩的力学性能。板岩的中孔和大孔均表现出单分形特征。中孔(Db)的分形维数与FT旋回呈正相关,而大孔(Dc)的分形维数则相反。利用多重分形参数(ΔD, Δα)定量表征了微孔和大孔的非均质性特征。总体上,孔隙非均质性随FT旋回增大,其中大孔隙对孔隙结构的非均质性贡献显著。此外,板岩在FT旋回作用下的力学强度与孔隙非均质性参数和Hurst指数(H)均呈负相关。相比之下,DW条件下板岩的力学性质与孔隙非均质性参数无显著相关性。结果表明多重分形理论在板岩孔隙结构表征中的适用性。此外,它还为研究受FT旋回作用的岩石微观结构特征与宏观性质之间的联系提供了新的视角。
{"title":"Multifractal characteristics of slate pore structure based on nuclear magnetic resonance in cold region","authors":"Li Yin ,&nbsp;Daguo Wang ,&nbsp;Jianguo Lu ,&nbsp;Jiajian Jin ,&nbsp;Jiajia Gao ,&nbsp;Yun Liu","doi":"10.1016/j.coldregions.2025.104733","DOIUrl":"10.1016/j.coldregions.2025.104733","url":null,"abstract":"<div><div>The physical and mechanical properties of rocks in high-altitude cold regions are prone to degradation, often leading to severe geological disasters. In this study, combining nuclear magnetic resonance (NMR), uniaxial compression strength (UCS) tests and fractal theory, freeze-thaw (FT) cycle experiments under multiple environmental conditions including freeze-thaw in air (FT-A), water (FT-W) and alternating dry-wet cycle (DW-FT) were conducted for 0, 5, 10, 15, 20, 25, 30, 35, and 40 cycles. The temperature ranged from −15 °C to 20 °C. DW cycles included drying for 12.0 h at 105 °C, and then immersing in water for 12.0 h. NMR was employed to quantify pore size distributions by transverse relaxation time (<em>T₂</em>) spectra, providing the probability density dataset essential for multifractal analysis. The findings indicated that the porosity of slate significantly raised with number of freeze-thaw (FT) cycles, with more pronounced increase observed under FT-W or DW-FT conditions. Although the DW cycles had a relatively limited influence on porosity, they resulted in a noteworthy reduction in the mechanical properties of the slate. Additionally, the mesopores and macropores of slate exhibited monofractal characteristics. The fractal dimension of mesopores (<em>D</em><sub><em>b</em></sub>) positively correlated as the FT cycles, whereas the opposite results occurred for fractal dimension of macropores (<em>D</em><sub><em>c</em></sub>). Furthermore, multifractal parameters (Δ<em>D</em>, Δ<em>α</em>) were employed to provide quantitative characterization of the heterogeneity characteristics within micropores and macropores. Generally, the pore heterogeneity increased with FT cycles, with macropores contributing significantly to the heterogeneity of pore structure. Moreover, the mechanical strength of slate under FT cycles was negatively correlated with both the pore heterogeneity parameter and Hurst index (<em>H</em>). In contrast, the mechanical properties of slate under DW conditions showed no significant correlation with the pore heterogeneity parameter. The results demonstrated the applicability of multifractal theory in characterizing the pore structure of slate. Furthermore, it provided a novel perspective on the connection between the microstructure characteristics and macroscopic properties of rocks exposed to FT cycles.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"242 ","pages":"Article 104733"},"PeriodicalIF":3.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145517193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ground surface boundary condition methods for analysis of climate-driven permafrost thaw: A comparative study and long-term projections for Nunavik, Canada 分析气候驱动的永久冻土融化的地表边界条件方法:加拿大努那维克的比较研究和长期预测
IF 3.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-01-15 Epub Date: 2025-11-11 DOI: 10.1016/j.coldregions.2025.104735
Ali Fatolahzadeh Gheysari , Pooneh Maghoul
Infrastructure in northern regions is increasingly threatened by climate change, mainly due to permafrost thaw. Prediction of permafrost stability is essential for assessing the long-term stability of such infrastructure. A key aspect of geotechnical problems subject to climate change is addressing the surface energy balance (SEB). In this study, we evaluated three methodologies for applying surface boundary conditions in long-term thermal geotechnical analyses, including SEB heat flux, n-factors, and machine learning (ML) models by using ERA5-Land climate reanalysis data until 2100. We aimed to determine the most effective approach for accurately predicting ground surface temperatures for climate-resilient design of northern infrastructure. The evaluation results indicated that the ML-based approach outperformed both the SEB heat flux and n-factors methods, demonstrating significantly lower prediction errors. The feasibility of long-term thermal analysis of geotechnical problems using ML-predicted ground surface temperatures was then demonstrated through a permafrost case study in the community of Salluit in northern Canada, for which the thickness of the active layer and talik were calculated under moderate and extreme climate scenarios by the end of the 21st century. Finally, we discussed the application and limitations of surface boundary condition methodologies, such as the limited applicability of the n-factors in long-term analysis and the sensitivity of the SEB heat flux to inputs and thermal imbalance. The findings highlight the importance of selecting suitable boundary condition methodologies in enhancing the reliability of thermal geotechnical analyses in cold regions.
北方地区的基础设施日益受到气候变化的威胁,主要是由于永久冻土融化。永冻层稳定性的预测对于评估此类基础设施的长期稳定性至关重要。受气候变化影响的岩土工程问题的一个关键方面是解决地表能量平衡(SEB)。在这项研究中,我们利用era5 -陆地气候再分析数据,评估了三种将地表边界条件应用于长期热岩土分析的方法,包括SEB热通量、n因子和机器学习(ML)模型。我们的目标是确定最有效的方法来准确预测北部基础设施的气候适应性设计的地表温度。评价结果表明,基于ml的方法预测误差明显低于SEB热通量法和n因子法。利用ml预测的地表温度对岩土工程问题进行长期热分析的可行性,然后通过加拿大北部萨鲁特社区的永久冻土案例研究进行了验证,该案例计算了到21世纪末在中度和极端气候情景下活动层和对话层的厚度。最后,我们讨论了表面边界条件方法的应用和局限性,如n因子在长期分析中的有限适用性以及SEB热通量对输入和热不平衡的敏感性。研究结果强调了选择合适的边界条件方法对于提高寒冷地区热岩土分析的可靠性的重要性。
{"title":"Ground surface boundary condition methods for analysis of climate-driven permafrost thaw: A comparative study and long-term projections for Nunavik, Canada","authors":"Ali Fatolahzadeh Gheysari ,&nbsp;Pooneh Maghoul","doi":"10.1016/j.coldregions.2025.104735","DOIUrl":"10.1016/j.coldregions.2025.104735","url":null,"abstract":"<div><div>Infrastructure in northern regions is increasingly threatened by climate change, mainly due to permafrost thaw. Prediction of permafrost stability is essential for assessing the long-term stability of such infrastructure. A key aspect of geotechnical problems subject to climate change is addressing the surface energy balance (SEB). In this study, we evaluated three methodologies for applying surface boundary conditions in long-term thermal geotechnical analyses, including SEB heat flux, n-factors, and machine learning (ML) models by using ERA5-Land climate reanalysis data until 2100. We aimed to determine the most effective approach for accurately predicting ground surface temperatures for climate-resilient design of northern infrastructure. The evaluation results indicated that the ML-based approach outperformed both the SEB heat flux and n-factors methods, demonstrating significantly lower prediction errors. The feasibility of long-term thermal analysis of geotechnical problems using ML-predicted ground surface temperatures was then demonstrated through a permafrost case study in the community of Salluit in northern Canada, for which the thickness of the active layer and talik were calculated under moderate and extreme climate scenarios by the end of the 21st century. Finally, we discussed the application and limitations of surface boundary condition methodologies, such as the limited applicability of the n-factors in long-term analysis and the sensitivity of the SEB heat flux to inputs and thermal imbalance. The findings highlight the importance of selecting suitable boundary condition methodologies in enhancing the reliability of thermal geotechnical analyses in cold regions.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"242 ","pages":"Article 104735"},"PeriodicalIF":3.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145517249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Cold Regions Science and Technology
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1