Geotextiles and Geomembranes最新文献_第8页

Performance evaluation of geocell-reinforced pavements overlying black cotton soil 黑棉土上覆土工格室加筋路面性能评价

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-10-01 Epub Date: 2025-05-04 DOI: 10.1016/j.geotexmem.2025.04.004

Sayanti Banerjee, Bappaditya Manna, J.T. Shahu

The study conducted full-scale field trials in Dholera to examine the performance of geocell-reinforced and unreinforced pavements on expansive subgrades. Three geocell-reinforced sections (S-2 on expansive subgrade, S-4 on lime-treated subgrade, and S-5 on lime-treated subgrade with reduced base) and two unreinforced sections (S-1 on expansive subgrade and S-3 on lime-treated subgrade) were constructed. Performance was evaluated using static plate load tests and falling weight deflectometer tests. Geocell reinforcement enhances pavement bearing capacity, reduces subgrade vertical stress, and offers potential reductions in life-cycle costs and annual greenhouse gas emissions. Section S-2 showed higher bearing capacity compared to those of section S-3, highlighting the efficacy of reinforced sections over traditional stabilization. The study found that solely relying on lime treatment for expansive soil is not very effective, but combining it with geocells significantly improves pavement performance. Section S-4 showed the highest improvement in pavement performance, with a bearing capacity improvement factor of 3.04, modulus improvement factor of 2.26, and service life ratio of 2.61. The comparable performance of sections S-4 and S-5 suggests that section S-5 offers a sustainable and cost-effective alternative with satisfactory performance. Additionally, numerical analysis confirms the reliability of the field results as a valuable resource for researchers.

该研究在Dholera进行了全面的现场试验，以检查土工格室加固和未加固路面在膨胀路基上的性能。建造了3个土工格室加固段（膨胀路基的S-2、石灰处理路基的S-4和地基减少的石灰处理路基的S-5）和2个非加固段（膨胀路基的S-1和石灰处理路基的S-3）。使用静板载荷试验和下落重量挠度计试验对性能进行了评估。土工格室加固增强了路面承载能力，降低了路基垂直应力，并有可能降低生命周期成本和年度温室气体排放。S-2截面的承载力高于S-3截面，突出了加固截面相对于传统加固的有效性。研究发现，单纯依靠石灰处理膨胀土效果不佳，但与土工细胞结合使用可显著改善路面性能。S-4路段路面性能改善幅度最大，承载改善系数为3.04，模量改善系数为2.26，使用寿命比为2.61。第S-4款和第S-5款的业绩比较表明，第S-5款提供了一种业绩令人满意的可持续和具有成本效益的替代办法。此外，数值分析证实了现场结果的可靠性，为研究人员提供了宝贵的资源。

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引用次数: 0

Experimental investigation of the capillary drainage performance of multilayer wicking fabric 多层排芯织物毛细排水性能的实验研究

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-10-01 Epub Date: 2025-05-25 DOI: 10.1016/j.geotexmem.2025.05.005

Yifan Wang , Yongkang Wu , Xu Li , Shaowei Wei , Hongye Yan

Excessive moisture within subgrade layers significantly diminishes subgrade stiffness and induces pavement deformation. A multilayer wicking fabric (WF) composed of deeply grooved fibers was developed to regulate moisture in unsaturated fine-grained soils. This study introduces a novel methodology for determining the water retention curve (WRC) over the full suction range. At the same time, an efficient method for predicting WF's WRC via NMR technology was pointed, and clarifying the material's microscopic drainage mechanisms. Building on this foundation, soil column drying experiments were conducted to verify WF's moisture regulation capacity in unsaturated fine-grained soils. The results demonstrate that WF exhibits its highest water retention under conditions of elevated matric suction. Additionally, soil column drying experiments reveal that WF incorporation significantly reduces average soil water content and accelerates drying rates. WF's drainage efficiency shows high sensitivity to initial water contents (w_i) and evaporation segment length (L), with drainage performance increasing proportionally to these parameters. Moreover, soil water profiles are influenced by water retention capacity, capillary migration rate, and hydraulic gradient. These findings underscore the potential of multilayer wicking fabrics in managing moisture within fine-grained subgrades, presenting a novel and effective strategy for maintaining subgrade dryness and enhancing long-term stability.

路基层内水分过多会显著降低路基刚度，引起路面变形。研制了一种由深沟槽纤维组成的多层吸湿织物，用于非饱和细粒土的水分调节。本研究介绍了一种新的方法来确定全吸力范围内的水保持曲线（WRC）。同时，指出了利用核磁共振技术预测WF的WRC的有效方法，并阐明了材料的微观排水机理。在此基础上，进行了土柱干燥试验，验证了WF在非饱和细粒土中的调节水分能力。结果表明，在提高基质吸力的条件下，WF的保水率最高。此外，土壤柱干燥试验表明，WF掺入显著降低了土壤平均含水量，加快了干燥速度。WF排水效率对初始含水量（wi）和蒸发段长度(L)高度敏感，排水性能与这两个参数成正比增加。此外，土壤水分剖面受保水能力、毛管迁移速率和水力梯度的影响。这些发现强调了多层吸湿织物在细粒路基中控制水分的潜力，为保持路基干燥和提高长期稳定性提供了一种新颖有效的策略。

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引用次数: 0

Mechanical properties and mechanisms of soil-geotextile interface under constant normal Stiffness: Effect of freezing conditions 恒法向刚度条件下土-土工织物界面力学特性及机理：冻结条件的影响

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-10-01 Epub Date: 2025-05-05 DOI: 10.1016/j.geotexmem.2025.04.003

Pengfei He , Ce Zhuang , Xiangbing Kong , Boyang Liu , Fuping Zhang

A set of direct shear tests on the soil-geotextile interface (SGI) were conducted using a temperature-controlled constant normal stiffness (CNS) direct shear apparatus. This was done in order to evaluate the effects of normal stiffness, initial normal stress, soil water content, and temperature on SGI shear behavior and micro-deformation patterns. The observations indicate that all shear stress-shear displacement curves demonstrate strain-hardening characteristics, with SGI cohesion and friction angle increasing at higher normal stiffness and lower temperatures. At freezing conditions, water content significantly affects the interface friction angle, while this effect is minimal at positive temperatures. Normal stress increases with higher water content, lower temperatures, and higher normal stiffness. Shear stress initially rises with normal stress before decreases, with a more pronounced rise under sub-zero conditions. Normal stress shrinkage shows a positive correlation with normal stiffness. Micro-deformation analysis of soil particles at the interface indicates significant strain localization within the shear band, which is less pronounced under sub-zero temperatures compared to positive temperatures. These patterns of normal displacement vary across analysis points within the shear band, with the macroscopic normal displacement reflecting a cumulative effect of these microscopic variations.

采用温控恒法向刚度（CNS）直剪仪对土工织物界面（SGI）进行了直剪试验。这样做是为了评估法向刚度、初始法向应力、土壤含水量和温度对SGI剪切行为和微变形模式的影响。结果表明：在较高的法向刚度和较低的温度下，剪切应力-剪切位移曲线均表现出应变硬化特征，SGI黏聚力和摩擦角增大；在冻结条件下，水含量显著影响界面摩擦角，而在正温度下，这种影响最小。随着含水量的增加、温度的降低和法向刚度的提高，法向应力也随之增加。剪应力随正应力先升高后降低，在零下条件下，剪应力的升高更为明显。法向应力收缩率与法向刚度呈正相关。界面处土体颗粒的微变形分析表明，在剪切带内存在明显的应变局部化现象，与正温度相比，在零下温度下不太明显。这些法向位移模式在剪切带内的分析点之间变化，宏观法向位移反映了这些微观变化的累积效应。

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引用次数: 0

Consolidation solution of ground improved with artificial solidified crust–vertical drain 人工固化结皮改善地基固结液-垂直排水

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-10-01 Epub Date: 2025-05-20 DOI: 10.1016/j.geotexmem.2025.05.003

Long Chen , Desheng Li , Yonghui Chen , Yi Zhu , Kaizhe Shang

For artificial solidified crust (ASC)–vertical drain ground, an analytical consolidation solution (IB solution: regarding ASC as an impervious boundary) is proposed, which considers both the radial and vertical seepage. The orthogonal relation is proven and the computing efficiency is greatly improved. Then, consolidation solutions applicable to ASC–vertical drain ground, include IB solution, RDL solution (radial consolidation solution of double-layered ground) by Li et al. (2025), the quasi-rigorous solution by Tang and Onitsuka (2001), are compared and discussed. Compared to the quasi-rigorous solution, IB solution slightly overestimates the consolidation rate, but it can be promoted in engineering according to the following reasons: a) the convergence is easier to be achieved; b) its accuracy is not affected by the ratio of the vertical time factor to the radial time factor; c) common major parameters of ASC (i.e., thickness and permeability) have little effect on the applicability. By ignoring the vertical seepage in soil, IB solution degenerates to the simplified solution. Consolidation rate calculated by the simplified solution is slower than that of IB solution, and the solution can be a simple method for estimating the consolidation behavior of ASC–vertical drain ground.

针对人工固化壳(ASC) -垂直排水地基，提出了考虑径向和垂直渗流的解析固结解（IB解：以ASC为不透水边界）。证明了正交关系，大大提高了计算效率。然后对适用于asc垂直排水地基的固结方案，包括IB方案、Li等人（2025）的RDL方案（双层地基径向固结方案）、Tang和Onitsuka（2001）的准严格方案进行了比较和讨论。与拟严格解相比，IB解对固结率的估计略高，但在工程上可以推广，原因如下：a)收敛性更容易实现；B)其精度不受垂直时间因子与径向时间因子之比的影响；c) ASC常用主要参数（即厚度和渗透率）对适用性影响不大。忽略土中的竖向渗流，IB解退化为简化解。简化解计算出的固结速率比IB解计算出的固结速率要慢，可以作为一种简便的估算asc -竖向排水地基固结特性的方法。

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引用次数: 0

Load-induced strain analysis in geocell reinforced footing systems 土工格室加固基础系统的荷载诱发应变分析

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-10-01 Epub Date: 2025-05-21 DOI: 10.1016/j.geotexmem.2025.05.002

Sarper Demirdogen, Ayhan Gurbuz

In performance-based design, it is crucial to understand deformation characteristics of geocell layers in soil under footing loads. To explore this, a series of laboratory loading tests were carried out to investigate the influence of varying parameters on the strain levels within the geocell layer in a sandy soil under axial strip footing loading. The results were analyzed in terms of maximum strain levels, strain variation along the geocell layer and the correlation between horizontal and vertical strains. In this study, the maximum observed strain levels for geocell-reinforced strip footing systems reached 2.3 % for horizontal (tensile) strain and 1.4 % for vertical (compressive) strain. Furthermore, most strain levels were concentrated within a distance of 1.5 times the footing width from the axis of strip footing. In geocell-reinforced footing systems, the interaction between horizontal and vertical strains becomes a key factor, with the ratio of horizontal to vertical cell wall strains ranging approximately from 1 to 2.5. The outcomes of this study are expected to contribute to the practical applications of geocell-reinforced footing systems.

在基于性能的设计中，了解土工格室层在基础荷载作用下的变形特征是至关重要的。为此，开展了一系列室内加载试验，研究了轴向条形基础加载下不同参数对砂土土工格室层应变水平的影响。分析了最大应变水平、应变沿土工格室层的变化以及水平应变与垂直应变的相关性。在本研究中，土工格室加筋条形基础系统的最大观测应变水平在水平（拉伸）应变下达到2.3%，在垂直（压缩）应变下达到1.4%。大多数应变水平集中在距条形基础轴线1.5倍基础宽度范围内。在土工格室加固基础体系中，水平应变与竖向应变之间的相互作用成为关键因素，水平应变与竖向应变之比约为1 ~ 2.5。本研究结果有望为土工格室加固基础系统的实际应用做出贡献。

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引用次数: 0

Leakage of composite cutoff walls through geomembrane joint defects 复合防渗墙通过土工膜接缝缺陷渗漏

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-10-01 Epub Date: 2025-04-30 DOI: 10.1016/j.geotexmem.2025.04.002

Lin-Feng Cao, Yu-Chao Li, Bo Huang

Composite geomembrane-soil-bentonite (CGSB) cutoff walls are effective barriers to contain highly aggressive contaminated groundwater. Defects in the geomembrane (GM) joint are inevitable during the installation, inducing preferential flow paths. An experimental device is designed to measure the flow rate

Q

through the joint defects of CGSB walls. Experiments and numerical simulations are performed to investigate the leakage characteristics of CGSB walls. The results show that soil-bentonite (SB) enters the joint under pressure and has a sealing effect similar to a hydrophilic gasket, which effectively reduces the

Q

. As the hydraulic head

h_{w}

increases, the internal gap width of the joint increases, resulting in a significant increase in

Q

. When

h_{w}

increases from 1 to 2 m, the maximum increase in the measured

Q

exceeds 17.6 times. The fracture pore diameter

d_{f}

of the joint filled with SB decreases by an order of magnitude compared to the case without SB filling. When

d_{f}

is less than 0.1 mm, the leakage of the CGSB wall is mainly controlled by

d_{f}

; while

d_{f}

is greater than 0.2 mm, the leakage is mainly affected by the interface transmissivity between the GM and SB.

复合土工膜-土壤-膨润土（CGSB）防渗墙是截流高侵蚀性地下水的有效屏障。土工膜（GM）接缝在安装过程中不可避免地会出现缺陷，从而产生优先流道。设计了一种测量CGSB壁面接缝缺陷流速Q的实验装置。通过实验和数值模拟研究了CGSB墙体的泄漏特性。结果表明：土-膨润土（SB）在压力下进入节理，具有类似于亲水性垫片的密封作用，有效降低了Q值，随着水头hw的增大，节理内部间隙宽度增大，导致Q值显著增大，当hw从1 m增大到2 m时，测得Q值的最大增幅超过17.6倍；与未填充SB的情况相比，填充SB的接头断裂孔径df减小了一个数量级。当df < 0.1 mm时，CGSB墙体渗漏主要受df控制；当df > 0.2 mm时，泄漏量主要受GM - SB界面透过率的影响。

{"title":"Leakage of composite cutoff walls through geomembrane joint defects","authors":"Lin-Feng Cao, Yu-Chao Li, Bo Huang","doi":"10.1016/j.geotexmem.2025.04.002","DOIUrl":"10.1016/j.geotexmem.2025.04.002","url":null,"abstract":"<div><div>Composite geomembrane-soil-bentonite (CGSB) cutoff walls are effective barriers to contain highly aggressive contaminated groundwater. Defects in the geomembrane (GM) joint are inevitable during the installation, inducing preferential flow paths. An experimental device is designed to measure the flow rate <span><math><mrow><mi>Q</mi></mrow></math></span> through the joint defects of CGSB walls. Experiments and numerical simulations are performed to investigate the leakage characteristics of CGSB walls. The results show that soil-bentonite (SB) enters the joint under pressure and has a sealing effect similar to a hydrophilic gasket, which effectively reduces the <span><math><mrow><mi>Q</mi></mrow></math></span>. As the hydraulic head <span><math><mrow><msub><mi>h</mi><mi>w</mi></msub></mrow></math></span> increases, the internal gap width of the joint increases, resulting in a significant increase in <span><math><mrow><mi>Q</mi></mrow></math></span>. When <span><math><mrow><msub><mi>h</mi><mi>w</mi></msub></mrow></math></span> increases from 1 to 2 m, the maximum increase in the measured <span><math><mrow><mi>Q</mi></mrow></math></span> exceeds 17.6 times. The fracture pore diameter <span><math><mrow><msub><mi>d</mi><mi>f</mi></msub></mrow></math></span> of the joint filled with SB decreases by an order of magnitude compared to the case without SB filling. When <span><math><mrow><msub><mi>d</mi><mi>f</mi></msub></mrow></math></span> is less than 0.1 mm, the leakage of the CGSB wall is mainly controlled by <span><math><mrow><msub><mi>d</mi><mi>f</mi></msub></mrow></math></span>; while <span><math><mrow><msub><mi>d</mi><mi>f</mi></msub></mrow></math></span> is greater than 0.2 mm, the leakage is mainly affected by the interface transmissivity between the GM and SB.</div></div>","PeriodicalId":55096,"journal":{"name":"Geotextiles and Geomembranes","volume":"53 5","pages":"Pages 1063-1075"},"PeriodicalIF":4.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Investigation on relationship of geogrid strain and settlement in the GRPS embankment under cyclic loading 循环荷载作用下GRPS路堤土工格栅应变与沉降关系研究

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-10-01 Epub Date: 2025-05-09 DOI: 10.1016/j.geotexmem.2025.04.005

Kaifu Liu, Shiyu Xu, Zhangbo Wan, Minjie Wen, Kairen Xue

Geosynthetic-reinforced pile-supported (GRPS) embankments provide an effective solution for mitigating subgrade settlement and enhancing service performance. This study presents a series of physical model tests aimed at gaining a comprehensive understanding of the mechanical behavior of geogrids in GRPS embankments. Effects of loading cycles, loading frequency, geogrid layer number, and pile type on geogrid strain and settlement were investigated. An empirical formula was introduced to evaluate the impact of these factors on the relationship between geogrid strain and settlement. The results demonstrate that both geogrid strain and settlement increase with loading cycles and loading frequency, while longer piles effectively reduce settlement. GRPS embankments with two geogrid layers exhibited smaller geogrid strain and settlement compared to those with a single layer. A power function incorporating the normalized geogrid strain increment ratio and settlement was developed to predict the geogrid strain variations under cyclic loading, with significant influence from the aforementioned factors. Furthermore, an application of the EBGEO method, modified to account for cyclic loadings, is proposed, which introduces a load parameter to account for the number of loading cycles. The results obtained using this modified method closely align with measured values, providing a more accurate estimation of geogrid strain development under cyclic loading.

土工合成增强桩支撑（GRPS）路堤是缓解路基沉降和提高使用性能的有效解决方案。本研究提出了一系列物理模型试验，旨在全面了解GRPS路堤中土工格栅的力学行为。研究了加载周期、加载频率、土工格栅层数和桩型对土工格栅应变和沉降的影响。提出了一个经验公式来评价这些因素对土工格栅应变与沉降关系的影响。结果表明：土工格栅应变和沉降随加载周期和加载频率的增加而增加，而长桩能有效地降低沉降；与单层土工格栅相比，双层土工格栅路堤具有更小的土工格栅应变和沉降。建立了结合归一化土工格栅应变增量比和沉降的幂函数来预测循环荷载作用下土工格栅应变的变化，上述因素对土工格栅应变变化有显著影响。此外，还提出了EBGEO方法的一种应用，该方法经过修改以考虑循环荷载，该方法引入了一个荷载参数来考虑荷载循环次数。修正方法得到的结果与实测值吻合较好，能更准确地估计土工格栅在循环荷载作用下的应变发展情况。

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引用次数: 0

Response of isolated footing on a geogrid reinforced fill and undisturbed peat subgrade soil system 土工格栅加筋填土-原状泥炭基土体系隔震基础响应

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-10-01 Epub Date: 2025-05-17 DOI: 10.1016/j.geotexmem.2025.05.001

Aykut Erol, Zulkuf Kaya

The geotechnical behavior of undisturbed peat subgrade within geogrid-reinforced foundation systems remains inadequately understood, despite its high compressibility and engineering complexities. This study conducts a systematic investigation into the bearing capacity and settlement characteristics of an isolated footing on geogrid-reinforced fill over undisturbed peat, utilizing laboratory-scale model tests. Unlike previous studies that rely on disturbed peat samples, this research preserves natural stratification and in-situ response mechanisms, providing a more accurate representation of reinforcement performance. The results demonstrate that geogrid reinforcement enhances bearing capacity by up to 149.7 % and mitigates settlement by 79 %, with optimal reinforcement efficiency achieved at h/B = 0.3. These findings underscore the critical role of geogrid embedment depth, fill thickness, and relative density in optimizing foundation stability. By integrating undisturbed peat in physical modeling, this study bridges the gap between controlled laboratory experiments and real-world geotechnical applications, providing a framework for optimizing geosynthetic reinforcement strategies in highly compressible subgrades and paving the way for more reliable foundation designs in challenging ground conditions.

土工格栅加固基础体系中未受扰动泥炭地基的岩土力学特性仍未得到充分的了解，尽管其具有高压缩性和工程复杂性。本研究利用实验室规模的模型试验，对未受扰动泥炭上土工格栅加筋填筑隔震基础的承载力和沉降特性进行了系统的研究。与以往依赖于扰动泥炭样品的研究不同，本研究保留了自然分层和原位响应机制，提供了更准确的加固性能表征。结果表明：加筋后土工格栅承载力可提高149.7%，沉降可降低79%，当h/B = 0.3时，加筋效率最佳；这些发现强调了土工格栅嵌入深度、填充厚度和相对密度在优化基础稳定性中的关键作用。通过将未受干扰的泥炭整合到物理模型中，本研究弥合了受控实验室实验与现实岩土工程应用之间的差距，为优化高压缩性路基的土工合成加固策略提供了框架，并为在具有挑战性的地面条件下进行更可靠的基础设计铺平了道路。

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引用次数: 0

Critical state mechanics-based arching model for pile-supported embankments 基于临界状态力学的桩基路堤拱模型

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-08-01 Epub Date: 2025-03-26 DOI: 10.1016/j.geotexmem.2025.03.002

Tuan A. Pham , Abdollah Tabaroei , Daniel Dias , Jie Han

The study and application of soil arching theory in geosynthetic-reinforced pile-supported (GRPS) embankments have gained increasing attention, as accurate arching estimation significantly influences load-deflection behavior of structures. While most existing models rely on Rankine's earth pressure theory, which applies primarily to granular soils and neglects cohesion effects. This paper employs three-dimensional numerical simulations to examine the impact of soil cohesion on soil arching mechanisms in pile-supported embankments. Results indicate that cohesion enhances load transfer to piles, with arching efficacy increasing nonlinearly before stabilizing at higher cohesion values. Building on these findings, the ground reaction curve (GRC) model is proposed to predict arching behavior in both cohesive and non-cohesive embankments at various deformation stages. By integrating critical state soil mechanics with the concentric arch model, the transition between maximum and critical arching states is captured through changes in the mobilized friction angle with relative displacement. Model validation against two well-instrumented case studies demonstrates its accuracy, particularly in accounting for soil cohesion. Moreover, the maximum arching model better predicts GRPS embankments under small deformations (relative displacement <4 %), while the critical arching model is more suitable for large deformations (relative displacement >6 %). The proposed model effectively captures arching behavior improvements in both cohesive and non-cohesive soils.

土拱理论在土工合成桩支撑（GRPS）路堤中的研究和应用越来越受到重视，因为准确的土拱估算对结构的荷载-挠曲行为有重要影响。而现有的大多数模型依赖于Rankine土压力理论，该理论主要适用于颗粒土而忽略了粘聚效应。本文采用三维数值模拟的方法研究了土体粘聚力对桩基路堤土拱机制的影响。结果表明：粘聚力增强了荷载向桩的传递，在较高的粘聚力值下，拱效率呈非线性增长，趋于稳定；在此基础上，提出了地基反力曲线（GRC）模型来预测粘性和非粘性路堤在不同变形阶段的拱行为。将临界状态土力学与同心拱模型相结合，通过动员摩擦角随相对位移的变化来捕捉最大拱状态与临界拱状态之间的过渡。模型验证对两个良好的仪器案例研究证明了其准确性，特别是在考虑土壤凝聚力。最大拱模型较好地预测了小变形（相对位移>； 4%）下的GRPS路堤，而临界拱模型更适合于大变形（相对位移>； 6%）下的GRPS路堤。所提出的模型有效地捕捉了粘性和非粘性土壤中拱行为的改善。

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引用次数: 0

Model tests on wicking geosynthetic composite reinforced bases over weak subgrade 软弱地基上吸湿土工合成复合材料加筋地基模型试验

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-08-01 Epub Date: 2025-03-28 DOI: 10.1016/j.geotexmem.2025.03.006

Minghao Liu , Jiming Liu , Sam Bhat , Yongxuan Gao , Cheng Lin

Road performance is significantly enhanced by incorporating geosynthetics through their reinforcement and drainage functions. This study introduces a novel geosynthetic that integrates these functions. It is made of biaxial polypropylene geogrids heat-bonded to wicking nonwoven geotextiles (WNWGs). WNWGs are chemically treated to be hydrophilic and thus possess rapid wetting and wicking properties while preserving the large lateral drainage functionality of conventional nonwoven geotextiles. To assess the combined reinforcement and drainage performance of this material, a series of model tests including rainfall simulation and plate loading tests were performed on the WNWG-geogrid composite reinforced bases over weak subgrade using a customized model test apparatus. The results confirmed that the inclusion of wicking geosynthetic composite significantly enhanced drainage, stiffness, and bearing capacity of road bases compared to the conventional nonwoven geotextile-geogrid reinforcement and the unreinforced condition. The modulus improvement factor (MIF) for this wicking composite was 2.74 as compared to 1.46 for the conventional nonwoven geotextile-geogrid reinforcement. The findings from this study demonstrate the promising performance of this new composite and provide a valuable reference for full-scale tests and applications on roads.

土工合成材料的加固和排水功能大大提高了道路性能。本研究介绍了一种集成了这些功能的新型土工合成材料。它是由双轴聚丙烯土工格栅热粘合到吸芯非织造土工布（WNWGs）。WNWGs经过化学处理，具有亲水性，因此具有快速润湿和排芯性能，同时保留了传统非织造土工布的大侧向排水功能。为了评估该材料的综合配筋和排水性能，使用定制的模型试验装置对弱路基上的wnwg -土工格栅复合地基进行了降雨模拟和板载试验等一系列模型试验。结果证实，与常规非织造土工布-土工格栅加固和未加筋条件相比，加入吸芯土工合成复合材料显著提高了道路基层的排水能力、刚度和承载能力。这种吸芯复合材料的模量改善系数（MIF）为2.74，而传统的非织造土工布-土工格栅增强材料的模量改善系数为1.46。研究结果证明了这种新型复合材料的良好性能，并为全面测试和道路应用提供了有价值的参考。

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引用次数: 0