Geotextiles and Geomembranes最新文献_第2页

Stress transfer mechanism of ground reinforcement embankments subjected to lateral rockfall impact 侧向落石冲击下地基加固路堤的应力传递机制

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-12-10 DOI: 10.1016/j.geotexmem.2025.12.002

Liang Lu , Haibo Zhu , Zongjian Wang , Chengkun Wu , Lanxing Li , Katsuhiko Arai

The stress transfer mechanism of ground reinforced embankments subjected to lateral rockfall impact is systematically investigated through full-scale tests, finite element simulations, and theoretical analysis, with a particular focus on the stress diffusion angle. The results indicate that the impact-induced stress propagated rapidly and attenuated with increasing distance from the impact point, with transmission most efficient in the direction of impact. Parametric analyses demonstrate that impact energy, reinforcement spacing, and soil friction angle significantly influenced stress dispersion, whereas the height-to-thickness ratio mainly affected wall deformation. It is found that a reinforcement spacing of 0.2 m yielded optimal performance in resisting rockfall impact. Furthermore, it is recommended that the height-to-thickness ratio of the embankment be limited to less than 2 to mitigate wall deformation and prevent rear extrusion under impact. A theoretical model for the stress diffusion angle is derived based on the conical stress diffusion theory, providing an explicit analytical expression for GREs under lateral rockfall impact. The proposed model shows satisfactory agreement with numerical results, with discrepancies below 15 %, thereby validating the reliability of the theoretical solution.

通过全尺寸试验、有限元模拟和理论分析，系统地研究了侧向落石冲击下地面加筋土路堤的应力传递机制，特别关注了应力扩散角。结果表明：冲击诱发应力的传播速度快，随距离冲击点的增加而衰减，在冲击方向上传播效率最高；参数分析表明，冲击能、配筋间距和土摩擦角对应力分散有显著影响，而高厚比主要影响墙体变形。研究发现，当加固间距为0.2 m时，抗落石冲击效果最佳。此外，建议将路堤的高厚比限制在2以下，以减轻墙的变形，防止冲击下的后挤压。基于锥形应力扩散理论，推导了应力扩散角的理论模型，给出了侧向岩崩冲击下应力扩散角的明确解析表达式。该模型与数值结果吻合较好，误差小于15%，从而验证了理论解的可靠性。

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引用次数: 0

Quantification of shear-induced wear development on textured geomembrane-geotextile interfaces 土工膜-土工织物界面剪切磨损发展的量化

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-12-09 DOI: 10.1016/j.geotexmem.2025.12.001

Gary John Fowmes , Catalin Alexandru Zaharescu , Zhiming Chao , Ahmad Mousa

The development of wear on the textured geomembrane interface has a significant influence on the reduction of post-peak interface shear strength. This study aims to examine and quantify the development of shear-driven wear on geosynthetic interfaces. New interfacial parameters are introduced to systematically describe the changes in the surface morphology of a geomembrane during the shearing process by combining quantitative and qualitative digital imaging techniques. Based on the developed surface roughness geometric parameters, an intensive quantitative and stereoscopic analysis of the wear development of the geomembrane surface morphology has been conducted during interfacial shear. The geometric parameters of the textured surface, namely asperity height, top angle, top radius, approach angle, and departure angle, can capture the changes in surface topography of the geomembrane in pre- and post-shearing. The top angle and radius, as well as the approach and departure angles, change significantly during the early stages of shearing (5 mm–20 mm). In general, the changes in the adopted geometric parameters resulted from a shearing rise associated with the increase in normal pressure. Furthermore, they could be used to better define the evolution of wear through complex stress histories that geomembranes frequently experience.

土工膜界面磨损的发展对峰后界面抗剪强度的降低有显著影响。本研究旨在研究和量化土工合成界面剪切驱动磨损的发展。采用定量与定性相结合的数字成像技术，引入新的界面参数，系统地描述了土工膜剪切过程中表面形貌的变化。基于已开发的表面粗糙度几何参数，对界面剪切过程中土工膜表面形貌的磨损发展进行了深入的定量和立体分析。纹理表面的几何参数，即凹凸高度、顶角、顶半径、接近角和出发角，可以捕捉到剪切前后土工膜表面形貌的变化。剪切初期（5 mm ~ 20 mm），顶角、半径、进近角和偏离角变化明显。总的来说，所采用几何参数的变化是由于与法向压力增加相关的剪切上升。此外，它们可以用来更好地定义土工膜经常经历的复杂应力历史的磨损演变。

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引用次数: 0

Cold temperature behaviour of polyethylene geomembranes 聚乙烯土工膜的低温性能

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-11-21 DOI: 10.1016/j.geotexmem.2025.11.002

M. Somuah, F.B. Abdelaal, R. Kerry Rowe

Impact and tensile tests were conducted on two high-density polyethylene (HDPE) geomembranes made from unimodal and bimodal resins, as well as a linear low-density polyethylene (LLDPE) geomembrane. This study investigates the ductile-to-brittle transition temperatures (DBTTs), energy-to-break (EtB, defined as the amount of energy required to cause a geomembrane specimen to either partially or fully fracture under impact test conditions). Of the three geomembranes, BMzA15 maintained the highest overall EtB values, followed closely by LxD15, and significantly above MxC15, over a range of temperatures (−60 °C–25 °C). Results showed that DBTT occurred between −16 °C and −27 °C, significantly above the glass transition temperature (Tg) of polyethylene. While higher molecular weight and lower density correlated with lower DBTT, no single resin property consistently predicted impact energy absorption below the DBTT. Additionally, surface flaws as shallow as 5 % of the geomembrane's nominal thickness shifted DBTT upward by nearly 18 °C, and reduced energy-to-break by about 33 %. These findings highlight the need for careful material selection, defect management, and load-rate consideration when selecting geomembranes for applications in cold environments.

对两种由单峰和双峰树脂制成的高密度聚乙烯（HDPE）土工膜以及一种线性低密度聚乙烯（LLDPE）土工膜进行了冲击和拉伸试验。本研究研究了土工膜在冲击试验条件下部分或完全断裂所需的能量，即韧性到脆性转变温度（dbtt）和断裂能量（EtB）。在三种土工膜中，BMzA15保持最高的总EtB值，其次是LxD15，并且在温度范围（- 60°C - 25°C）显著高于MxC15。结果表明，DBTT发生在- 16 ~ - 27℃之间，明显高于聚乙烯的玻璃化转变温度（Tg）。虽然较高的分子量和较低的密度与较低的DBTT相关，但没有单一树脂性能一致地预测低于DBTT的冲击能量吸收。此外，仅占土工膜标称厚度5%的表面缺陷使DBTT上升了近18°C，并减少了约33%的断裂能量。这些发现强调了在选择用于寒冷环境的土工膜时，需要仔细选择材料，缺陷管理和负载率考虑。

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引用次数: 0

Physical performance of flexible pavement system with and without a Portland-cement-concrete (PCC) slab for geofoam embankments 土工泡沫路堤有和没有波特兰水泥混凝土（PCC）板柔性路面系统的物理性能

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-11-20 DOI: 10.1016/j.geotexmem.2025.11.001

Emre Akınay , Hande Isik Ozturk , Abdullah Yasin Büyükaslan , Abdullah Tolga Özer

Pavement system design for geofoam block embankments requires special solution due to their low California Bearing Ratio (CBR) values. Hence, the use of a reinforced Portland-cement-concrete (PCC) slab atop the geofoam block assemblage is considered as a practical approach to increase the stiffness of the pavement. On the other hand, the PCC slab has some inherent disadvantages such as construction delay due to curing. A thicker pavement system without a PCC slab can be a potential alternative. Hence, the performance of flexible pavement systems with and without PCC slab were investigated using the accelerated pavement test (APT) program in detail. Two 3.75 m-wide and 10 m-long pavements were constructed in a test bed, and a controlled wheel load was applied using a 3-axle, 37.72-ton truck that traveled with an average speed of 16.5 km/h. The test was terminated, when rutting reached to steady deformation pattern at 1299 passes (3897 axle repetitions), which is equal to 20,264.4 equivalent single axle loads (ESAL). The test program also included plate load tests (PLT) and falling weight deflectometer (FWD) tests. The full-scale APT results showed that flexible pavement systems without a PCC slab for geofoam block embankments can be a viable option.

土工泡沫砌块路堤的路面系统设计由于其较低的加州承载比（CBR）值需要特殊的解决方案。因此，在土工泡沫砌块组合之上使用增强波特兰水泥混凝土（PCC）板被认为是增加路面刚度的实用方法。另一方面，PCC板也存在一些固有的缺点，如由于养护而导致施工延迟。没有PCC板的较厚路面系统可能是一个潜在的替代方案。为此，采用加速路面试验（APT）程序对含PCC板和不含PCC板的柔性路面系统的性能进行了详细的研究。在试验台上建造了两条3.75米宽和10米长的路面，并使用一辆3轴、37.72吨、平均速度为16.5公里/小时的卡车施加可控轮载。当车辙在1299次（3897轴重复）达到稳定变形模式时，试验终止，相当于20,264.4等效单轴载荷（ESAL）。测试程序还包括板载荷测试（PLT）和下落重量偏转计（FWD）测试。全面的APT结果表明，对于土工泡沫块路堤，没有PCC板的柔性路面系统是一种可行的选择。

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引用次数: 0

Numerical modelling of dredged sediment improvement under electrokinetic geosynthetics assisted vacuum preloading combined with electroosmosis 电动力土工合成材料辅助真空预压联合电渗透改善疏浚泥沙的数值模拟

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-11-06 DOI: 10.1016/j.geotexmem.2025.10.010

Jianting Feng , Yang Shen , Wencheng Qi , Wen Shi , He Yang

The absence of multi-physics modelling frameworks limits the optimisation of electrokinetic geosynthetics (EKG) assisted vacuum preloading combined with electroosmosis (VPE) technique for the consolidation and remediation of dredged sediments. A multi-physics coupling model was therefore developed that integrates electrical, hydraulic, mechanical, and chemical fields to simulate the consolidation and remediation processes in VPE. EKG assisted VPE experiments were conducted to verify this model. Results for electric field intensity, excess pore water pressure, settlement and Cu concentrations showed that the model accurately captured both consolidation and remediation behaviour in VPE treatment. Numerical results further revealed that electrical conductivity variations led to uneven distribution of electric potential. Electric potential was concentrated near the anode over time, subsequently influencing electroosmotic flow and electromigration. The dissipation of excess pore water pressure within the dredged sediments was promoted by VPE through the formation of negative pressure. At the anode, the dissipation of excess pore water pressure and the transport of Cu were primarily controlled by electrical conductivity variations, whereas at the cathode, excess pore water pressure dissipation and Cu accumulation were predominantly influenced by clogging.

缺乏多物理场建模框架限制了电动土工合成材料（EKG）辅助真空预压结合电渗透（VPE）技术对疏浚沉积物的固结和修复的优化。因此，开发了一个多物理场耦合模型，该模型集成了电气、水力、机械和化学领域，以模拟VPE中的固结和修复过程。通过心电图辅助VPE实验验证该模型。电场强度、超孔隙水压力、沉降和Cu浓度的结果表明，该模型准确地捕捉了VPE处理过程中的固结和修复行为。数值结果进一步揭示了电导率的变化导致电势分布的不均匀。随着时间的推移，电位集中在阳极附近，随后影响电渗透流动和电迁移。VPE通过形成负压促进疏浚沉积物内部超孔隙水压力的消散。在阳极，超孔隙水压力的耗散和Cu的输运主要受电导率变化的控制，而在阴极，超孔隙水压力的耗散和Cu的积累主要受堵塞的影响。

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引用次数: 0

Large-scale field experiment on vibration screening characteristics of continuous panel-based geofoam-infilled wave barrier 连续板型土工泡沫填波障隔振特性的大型现场试验

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-11-06 DOI: 10.1016/j.geotexmem.2025.10.008

Adarsh Singh , Sreyashrao Surapreddi , Priyanka Ghosh

This study investigates the vibration screening efficiency of geofoam-infilled (GB) and open trench (OB) wave barriers. Field-scale vibration tests are conducted to evaluate the performance of different barriers under active and passive screening conditions. A modular panel-based system is adopted for the GB to facilitate easy installation, uninstallation, and reinstallation. The impact of input frequency, source-barrier distance, and measurement direction on the performance of GB and OB is thoroughly examined. The results indicate that both barriers perform satisfactorily under different screening conditions, with superior effectiveness observed under active screening. For active screening, the performance of barriers improves with decreasing source-barrier distance. The screening efficiency of GB and OB is higher along the centerline than along the angular line. The performance of OB and GB improves with increasing input frequency for both active and passive screening techniques, irrespective of the source-barrier distance. Additionally, simplified design expressions are developed to predict the performance of GB under active and passive screening conditions. The predicted outcomes of the proposed expressions compare well with the findings reported in the literature.

本文研究了土工泡沫填充（GB）和开槽（OB）两种挡波材料的隔振效果。通过现场振动试验，评价了不同屏障在主动和被动筛分条件下的性能。GB采用模块化面板系统，便于安装、卸载和重新安装。深入研究了输入频率、源垒距离和测量方向对GB和OB性能的影响。结果表明，两种屏障在不同的筛选条件下均表现良好，其中主动筛选效果更佳。对于主动屏蔽，屏障的性能随着源-屏障距离的减小而提高。GB和OB沿中心线的筛分效率高于沿角线的筛分效率。在主动式和被动式筛选技术中，无论源障距离如何，OB和GB的性能都随着输入频率的增加而提高。此外，还开发了简化的设计表达式来预测GB在主动和被动筛选条件下的性能。所提出的表达的预测结果与文献报道的结果相比较。

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引用次数: 0

EDITORIAL: Best papers published in Geotextiles and Geomembranes in 2024 社论：2024年发表在土工织物和土工膜上的最佳论文

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-11-04 DOI: 10.1016/j.geotexmem.2025.10.009

Chungsik Yoo (Editor-in Chief)

引用次数: 0

Predicting long-term stress relaxation of geogrids using time–temperature superposition and the nonlinear three-component model 用时间-温度叠加和非线性三分量模型预测土工格栅的长期应力松弛

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-11-03 DOI: 10.1016/j.geotexmem.2025.10.005

Rawiwan Eakintumas, Warat Kongkitkul

This study presents a method for predicting the long-term stress relaxation (SR) behavior of geogrids using short-term testing combined with the time–temperature superposition (TTS) technique, known as SR-TTS. Two polymer geogrids—polypropylene (PP) and high-density polyethylene (HDPE)—were tested under constant tensile strain at multiple temperatures: 30 °C, 40 °C, and 50 °C for PP; and 30 °C, 37 °C, 44 °C, and 51 °C for HDPE. Master stress relaxation curves were constructed at a reference temperature of 30 °C by horizontally shifting short-term tensile load histories at elevated temperatures along the logarithmic time axis. Using this approach, 12-h tests for PP and 16-h tests for HDPE were extended to 115 and 4000 h, respectively, demonstrating the effectiveness of temperature-accelerated testing. A numerical simulation using the nonlinear three-component (NTC) model was also applied to replicate SR-TTS behavior. The master curves obtained from experimental SR-TTS tests showed excellent agreement with those from NTC-based simulations. Furthermore, both the experimental and simulated master curves closely matched long-term load decrement time histories from conventional stress relaxation (SR-CON) tests. These results confirm that SR-TTS, supported by numerical simulation, offers a reliable and efficient method for predicting long-term stress relaxation behavior of polymer geogrids under varying temperatures.

本研究提出了一种结合时间-温度叠加（TTS）技术的短期试验预测土工格栅长期应力松弛（SR）行为的方法，称为SR-TTS。两种聚合物土工格栅-聚丙烯（PP）和高密度聚乙烯(HDPE) -在多种温度下进行恒定拉伸应变测试：PP为30°C， 40°C和50°C；HDPE为30°C、37°C、44°C、51°C。在参考温度为30°C时，通过沿对数时间轴水平移动高温下的短期拉伸载荷历史，构建主应力松弛曲线。利用这种方法，PP的12小时测试和HDPE的16小时测试分别延长到115和4000小时，证明了温度加速测试的有效性。采用非线性三分量（NTC）模型对SR-TTS进行了数值模拟。实验SR-TTS测试得到的主曲线与基于ntc的模拟结果吻合良好。此外，实验和模拟的主曲线与常规应力松弛（SR-CON）试验的长期载荷衰减时间曲线非常吻合。这些结果证实，在数值模拟的支持下，SR-TTS为预测聚合物土工格栅在不同温度下的长期应力松弛行为提供了一种可靠、有效的方法。

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引用次数: 0

Seismic damage and energy distribution of pile-geogrid supported high-speed railway subgrade 桩-土工格栅支撑高速铁路路基的震害与能量分布

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-10-31 DOI: 10.1016/j.geotexmem.2025.10.006

Changwei Yang , Xianqing Xu , Zhikun Wang , Shibo Zhu , Mao Yue , Jing Lian , Shiguang Zhou

This study investigates the seismic damage and energy distribution of pile-geogrid supported high-speed railway subgrades using shaking table tests and time-frequency analysis methods such as STFT, SPWVD, WPD, and EMD. We found that cracks begin to appear at the base of the foundation when PGA reaches 0.2 g and severe damage occurs after PGA exceeds 0.6 g. The geogrids enhance soil integrity and mitigate PGA amplification factors. They distribute shear stresses to surrounding soil or other geogrids. Low-frequency waves play a predominant role in seismic damage due to their longer propagation distances. Scattering leads to changes in energy distribution as seismic waves propagate through caustic surfaces. The energy attenuation characteristics of high-frequency signal components and the increased contribution of low-frequency components under high PGA conditions are observed. An increase in the difference in variance contribution rate (VCR) indicates inconsistencies in the vibration characteristics of the soil. The sudden changes in Intrinsic mode functions (IMFs) suggest that the energy of seismic waves is amplified and attenuated to varying degrees. These findings provide a more solid theoretical foundation and novel approaches for the seismic design and performance assessment of high-speed railway subgrades.

采用振动台试验和STFT、SPWVD、WPD、EMD等时频分析方法，对高速铁路桩基土工格栅路基的地震损伤及能量分布进行了研究。我们发现，当PGA达到0.2 g时，基础底部开始出现裂缝，当PGA超过0.6 g时，基础底部出现严重破坏。土工格栅提高了土壤完整性，减小了PGA放大因子。它们将剪应力分布到周围的土壤或其他土工格栅上。低频波由于其传播距离较远，在地震灾害中起主导作用。当地震波通过苛性表面传播时，散射导致能量分布的变化。在高PGA条件下，观察到高频信号分量的能量衰减特性和低频分量的贡献增加。方差贡献率差异（VCR）的增大表明土的振动特性不一致。内禀模态函数（IMFs）的突变表明地震波的能量有不同程度的放大和衰减。这些研究结果为高速铁路路基抗震设计和性能评价提供了更为坚实的理论基础和新方法。

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引用次数: 0

Mechanical and economic performance of geogrid-reinforced base pavements: An integrated numerical, experimental, and field study 土工格栅加固基层路面的力学和经济性能：综合数值、实验和实地研究

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-10-29 DOI: 10.1016/j.geotexmem.2025.10.007

Qian Liu , Hongjun Jing , Di Wang

Inorganic binder-stabilized bases often suffer from insufficient lateral confinement and poor fatigue resistance, limiting pavement longevity. This study aims to enhance their mechanical behavior and durability using a geogrid-reinforced graded crushed stone base (GCS-GR). A multi-scale evaluation integrating Discrete Element Method (DEM) simulations, laboratory fatigue testing, field monitoring, and life-cycle cost analysis was conducted. Results show that geogrid reinforcement alleviates stress concentration and deflection instability under high-void conditions by forming a lateral force-chain network. Laboratory tests demonstrate that the single-layer structure (GCS-GR1) increases ultimate flexural strength and failure displacement by 31 % and 44 %, respectively. Under a high stress level (

σ / σ_{f}

= 0.8) corresponding to 80 % of the ultimate flexural strength, the fatigue life increases nearly threefold. Field monitoring reveals reduced deflection, rutting, and Pavement Condition Index (PCI) degradation rates of 31.6 %, 36.6 %, and 47.9 %, respectively. The vertical-to-transverse strain ratio decreased by 47 %, in good agreement with DEM predictions (3.1 % deviation), confirming the reliability of the DEM model. Furthermore, life-cycle cost analysis indicates that GCS-GR1 has the lowest total present value, reducing costs by approximately 8 % compared to the GCS. Overall, GCS-GR effectively enhances structural stability, fatigue life, and long-term economic sustainability of pavement bases.

无机粘结剂稳定基层往往存在侧向约束不足和抗疲劳性差的问题，限制了路面的使用寿命。本研究旨在使用土工格栅增强级配碎石基（GCS-GR）来提高其力学性能和耐久性。结合离散元法（DEM）模拟、实验室疲劳试验、现场监测和寿命周期成本分析进行了多尺度评价。结果表明：土工格栅加固通过形成横向力链网络，缓解了高孔隙条件下的应力集中和挠度失稳；室内试验表明，单层结构（GCS-GR1）的极限抗弯强度和破坏位移分别提高了31%和44%。在达到极限抗弯强度80%的高应力水平（σ/σf = 0.8）下，疲劳寿命提高近3倍。现场监测显示，减少挠度、车辙和路面状况指数（PCI）退化率分别为31.6%、36.6%和47.9%。垂直-横向应变比下降了47%，与DEM预测结果吻合较好（偏差3.1%），证实了DEM模型的可靠性。此外，生命周期成本分析表明，GCS- gr1的总现值最低，与GCS相比，成本降低了约8%。总体而言，GCS-GR有效提高了路面基层的结构稳定性、疲劳寿命和长期经济可持续性。

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引用次数: 0