Geotextiles and Geomembranes最新文献

Consolidation model for soft ground under airlift-assisted vacuum preloading 气升辅助真空预压下软土地基固结模型

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2026-06-01 Epub Date: 2026-01-30 DOI: 10.1016/j.geotexmem.2026.01.006

Xinbei Lin , Zhen Huang , Li Shi , Yuanqiang Cai

Recently, a novel soft ground improvement technique termed airlift-assisted vacuum preloading (AAVP) has been proposed, which is featured by cyclically injecting pressurized air at the bottom of prefabricated vertical drains (PVDs) to expel water from the drain. This airlift process can achieve nearly lossless transmission of vacuum pressure along the PVDs and induce pneumatic fractures that enhance soil permeability. In this study, a nonlinear consolidation model was developed with full consideration of the time-varying pressure condition and the permeability improvement associated with cyclic airlift operations. The analytical solution was obtained by employing the piecewise linearization technique, and was first verified by degenerating it into conventional vacuum preloading (CVP) process and comparing to the classical drain-well solution. The complete solution was further validated against large-scale model test data. Parametric analyses revealed that, compared with CVP, AAVP significantly accelerates the consolidation process, exhibiting not only faster pore pressure dissipation but also a greater magnitude of dissipation that exceeds the applied vacuum. Theoretical results indicate that the advantages of AAVP become more pronounced under greater treatment depths and in soil with adverse conditions such as smear and clogging effects, highlighting its strong potential for application in ultra-thick soft deposits and high-water-content reclamation land.

近年来，人们提出了一种新的软土地基改善技术，称为气升辅助真空预压（AAVP），其特点是在预制垂直排水管（PVDs）底部循环注入加压空气以排出排水管中的水。这种气举过程可以实现真空压力沿PVDs的几乎无损传递，并产生气动裂缝，从而提高土壤的渗透性。在本研究中，充分考虑时变压力条件和循环气举作业带来的渗透率提高，建立了非线性固结模型。采用分段线性化方法得到了解析解，并将其退化为常规真空预压过程，并与经典排水井解进行了对比验证。通过大规模模型试验数据进一步验证了完整的解决方案。参数分析表明，与CVP相比，AAVP显著加速了固结过程，不仅表现出更快的孔压耗散，而且耗散幅度更大，超过了施加真空。理论结果表明，AAVP处理深度越大，在存在涂抹、堵塞等不利条件的土壤中，其优势越明显，在超厚软质沉积物和高含水率复垦土地中具有较强的应用潜力。

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引用次数: 0

Influence of chemical enhancer injection timings on electrokinetic geosynthetics-assisted vacuum preloading combined with electroosmosis for dredged sediments dewatering and heavy metal removal 化学增强剂注入时间对电动土工合成助力真空预压联合电渗透疏浚沉积物脱水除重金属的影响

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2026-06-01 Epub Date: 2026-01-20 DOI: 10.1016/j.geotexmem.2026.01.005

Yang Shen , Ligao Zheng , Wencheng Qi , Chang Liu , Jianting Feng

Effective dewatering and heavy metal removal of dredged sediments using the electrokinetic geosynthetics-assisted vacuum preloading combined with electroosmosis (VPE) technique can convert dredged sediments into valuable resources for construction use. Chemical enhancers are commonly employed to enhance VPE performance, but their optimal injection timing remains largely unclear. This study investigated the influence of ethylenediaminetetraacetic acid (EDTA) and citric acid (CA) as well as their injection timings on the VPE efficacy for dredged sediment improvement. It compared drainage volume and drainage rate, moisture content, electric current and effective voltage, Cu concentration and speciation, and energy consumption under early- (I_t = I₀), mid- (I_t = 70 %I₀), and late-stage (I_t = 40 %I₀) injections. The results showed that CA generally outperformed EDTA, achieving approximately 200 mL greater final drainage volumes and averagely reducing Cu concentrations from ∼1640 mg/kg to ∼745 mg/kg (EDTA was ∼755 mg/kg). Late-stage CA injection optimized drainage efficiency and moisture content uniformity. It reduced the moisture content gradients between the cathode and the anode to ∼4 % (it was ∼12 % for the injection of I_t = I₀). The mid-stage injection of CA may achieve a balance between Cu removal and energy efficiency. EDTA, while less energy-intensive, retained higher weak-acid extractable Cu (∼15 %), posing leaching risks.

利用电动土工合成助力真空预压结合电渗透（VPE）技术对疏浚沉积物进行有效脱水和重金属去除，可将疏浚沉积物转化为有价值的建筑资源。化学增强剂通常用于提高VPE性能，但其最佳注射时间仍不清楚。本研究考察了乙二胺四乙酸（EDTA）和柠檬酸（CA）及其注入时间对疏浚底泥VPE改善效果的影响。比较了早期（It = I0）、中期（It = 70% I0）和后期（It = 40% I0）注射的排液量和排液速率、含水率、电流和有效电压、Cu浓度和形态、能耗。结果表明，CA总体上优于EDTA，最终排水量增加约200 mL，平均将Cu浓度从~ 1640 mg/kg降至~ 745 mg/kg （EDTA为~ 755 mg/kg）。后期CA注入优化了排水效率和含水率均匀性。它将阴极和阳极之间的水分含量梯度降低到~ 4%（注射It = I0时为~ 12%）。中期注入CA可以达到Cu去除和能量效率之间的平衡。EDTA虽然能耗较低，但保留了较高的弱酸可提取铜（约15%），存在浸出风险。

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引用次数: 0

Erosion control performance of geomats on silty soil slopes under simulated rainfall 模拟降雨条件下淤泥质土坡面土壤侵蚀控制性能研究

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2026-06-01 Epub Date: 2026-02-04 DOI: 10.1016/j.geotexmem.2026.01.007

Rui Zhang , Xiwei Zhang , Kang Chen , Yipeng Guo , Yanhua Yu , Huanhua Cai

Geomats are widely used for erosion control on slopes, yet quantitative links between their structural characteristics and erosion resistance remain insufficiently understood. This study investigates the influence of geomat geometry on erosion mitigation of silty slopes reinforced with five geomats. Erosion tests under simulated rainfall were conducted. An integrated structural–hydraulic–erosion framework was applied to relate geomat structural parameters, including porosity, pore-structure characteristics, compressed thickness, and mass per unit area, to hydraulic indicators (surface flow velocity and kinetic energy of surface runoff) and erosion indicators, including collected runoff mass, soil loss, sediment concentration, eroded area fraction, and maximum connected erosion area fraction. The results show that geomats substantially reduced erosion relative to the bare slope, decreasing cumulative soil loss by up to 89.1 %, sediment concentration by up to 84.3 %, and kinetic energy of surface runoff by 87.7–95.2 %. Geomats reduced erosion-domain connectivity and inhibited the development of continuous scouring channels, indicating effective attenuation of near-surface hydraulic forcing. Porosity and compressed thickness emerged as the dominant structural controls on erosion resistance. Geomats with porosity ≤26 % and compressed thickness ≥16 mm exhibited the best performance under the tested conditions. These findings provide mechanism-informed, preliminary guidance for erosion control on geomat-covered silty slopes.

geoats被广泛用于坡面侵蚀控制，但其结构特征与抗侵蚀能力之间的定量联系仍未得到充分的了解。本文研究了五种地形对粉质坡面加筋减蚀的影响。进行了模拟降雨条件下的侵蚀试验。采用结构-水力-侵蚀一体化框架，将孔隙度、孔隙结构特征、压缩厚度和单位面积质量等地质结构参数与水力指标（地表流速和地表径流动能）和侵蚀指标（收集径流质量、土壤流失量、含沙量、侵蚀面积分数和最大连通侵蚀面积分数）联系起来。结果表明，相对于裸坡而言，地质条件显著减少了侵蚀，累计土壤流失量减少了89.1%，泥沙浓度减少了84.3%，地表径流动能减少了87% - 95.2%。地形信息降低了侵蚀域连通性，抑制了连续冲刷通道的发展，表明近地表水力强迫的有效衰减。孔隙率和压缩厚度是影响抗侵蚀性的主要结构控制因素。在试验条件下，孔隙率≤26%、压缩厚度≥16 mm的地土表现出最好的性能。这些发现为土壤覆盖粉质斜坡的侵蚀控制提供了机制信息的初步指导。

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引用次数: 0

Finite-strain modelling of PVD-assisted consolidation in clayey soils using a novel elastic–viscoplastic model with destructuration based on the equivalent time concept 基于等效时间概念的新型弹粘塑性破坏模型的pvd辅助固结黏土有限应变模拟

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2026-06-01 Epub Date: 2026-02-04 DOI: 10.1016/j.geotexmem.2026.01.008

Peng-Lin Li , Zhen-Yu Yin , Ze-Jian Chen , Jian-Hua Yin

Prefabricated vertical drains (PVDs) are widely adopted to accelerate the consolidation of clayey soils. However, long-term settlement during the service period of infrastructure is often not adequately captured when soil structure degradation and creep are neglected. Existing models rarely consider the coupled effects of soil destructuration, creep, and nonlinear water flow in PVD-assisted consolidation. This study develops an axisymmetric finite-strain consolidation model incorporating an elastic–viscoplastic model with structuration (EVPS) based on the equivalent time concept. The formulation is applicable to clays possessing inherent structure that may undergo structure degradation under mechanical loading or PVD installation. The model considers soil creep, destructuration, smear effects, and nonlinear water flow, and is solved using an alternating direction implicit (ADI) finite-difference scheme. Finite-element comparisons are employed solely to verify the numerical implementation of the consolidation equations. Model performance is evaluated through comparisons with laboratory oedometer tests on natural structured clays and long-term field observations from the Haarajoki embankment. The results indicate that the proposed model can consistently reproduce pore-pressure dissipation and settlement evolution, including deformation occurring after primary consolidation over periods of several years to decades. Parametric studies reveal that soil destructuration, smear effect, and non-Darcian flow jointly govern the consolidation process. The proposed model enables more reliable prediction of consolidation behaviour in natural structured clays, which is essential for assessing long-term settlement and supporting rational design of ground improvement schedules.

预制垂直排水沟被广泛采用来加速粘性土的固结。然而，在忽略土体结构退化和徐变的情况下，基础设施服役期间的长期沉降往往得不到充分的反映。现有模型很少考虑pvd辅助固结过程中土体破坏、蠕变和非线性水流的耦合效应。本文建立了基于等效时间概念的轴对称有限应变固结模型，该模型结合了带结构的弹粘塑性模型（EVPS）。该配方适用于具有内在结构的粘土，在机械载荷或PVD安装下可能发生结构退化。该模型考虑了土体蠕变、破坏、涂抹效应和非线性水流，采用交替方向隐式有限差分格式求解。有限元对比仅用于验证固结方程的数值实现。模型的性能通过与天然结构粘土的实验室土壤测量试验和Haarajoki堤防的长期现场观测结果进行比较来评估。结果表明，该模型能够较好地再现孔隙压力耗散和沉降演化过程，包括数年至数十年的初始固结后的变形。参数化研究表明，土体破坏、涂抹效应和非达西流共同控制着固结过程。所提出的模型能够更可靠地预测天然结构粘土的固结行为，这对于评估长期沉降和支持合理设计地基改善计划至关重要。

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引用次数: 0

Impact of installation damage on the MIF of multi-layered geogrid-reinforced granular and subgrade layers 安装损伤对多层土工格栅加筋颗粒层和路基层MIF的影响

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2026-06-01 Epub Date: 2026-01-20 DOI: 10.1016/j.geotexmem.2026.01.004

Sireesh Saride , Shubham Jain , Vipul Arora

This study evaluates the influence of installation damage on the modulus improvement factors (MIF) obtained from a double layer geogrid-reinforced base and subbase layers through a full-scale field study and large-scale laboratory confirmation tests. Four different types of geogrids, viz., two knitted (polyester, PET) and two extruded (polypropylene, PP) geogrids, were considered in this study. Twenty-eight field plate load tests were conducted on control, single, and double-layer geogrid-reinforced pavement sections built along a National Highway on a subgrade with a California bearing ratio of 8 %. The geogrids were exhumed from the test sections before and after the plate load tests to estimate the installation damage. Results indicate that the PET grids provide a higher MIF value when placed at the subgrade-subbase interface, while the PP grids performed better when placed within the granular layers. The MIF values ranged from 1.8 to 2.3 for PET grids at the subgrade-subbase interface and from 1.7 to 1.9 for PP geogrids placed at the subbase and base interface. The average installation damage observed in the PET and PP grids is 25 % and 10 %, respectively. A detailed framework for estimating the field MIF values using laboratory MIF and corresponding installation damage-induced reduction factors was proposed.

本研究通过全尺寸的现场研究和大型实验室验证试验，评估了安装损伤对双层土工格栅基层和次基层模量改善系数（MIF）的影响。四种不同类型的土工格栅，即两种针织（聚酯，PET）和两种挤压（聚丙烯，PP）土工格栅，在本研究中被考虑。28个现场板荷载试验进行了对照，单层和双层土工格栅加固的路面路段沿国道，加州承载比为8%的路基。在板荷载试验前后，分别从试验段中挖掘出土工格栅，估算其安装损伤。结果表明，PET栅格在路基-基层界面处具有较高的MIF值，而PP栅格在颗粒层内具有较好的MIF值。PET栅格的MIF值为1.8 ~ 2.3，PP栅格的MIF值为1.7 ~ 1.9。在PET和PP网格中观察到的平均安装损坏分别为25%和10%。提出了一种利用实验室MIF和相应的装置损伤诱导折减系数估算现场MIF值的详细框架。

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引用次数: 0

Energy analysis of geomembrane wrinkling caused by temperature rise 温度升高引起土工膜起皱的能量分析

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2026-06-01 Epub Date: 2026-02-13 DOI: 10.1016/j.geotexmem.2026.02.003

Hai Lin , Xinwen Chen , Xian He , Mengxi Huang

High density polyethylene (HDPE) geomembranes tend to wrinkle and deform as temperature increases, which in turn deteriorates the contact conditions and hydraulic performance of landfill composite bottom liner systems. To clarify geomembrane wrinkle behavior under combined temperature and overburden pressure effects, this study employs the energy conservation principle using a simplified two-dimensional model to theoretically derive and analyze: (1) wrinkle formation due to temperature rise without overburden pressure, (2) wrinkle formation due to temperature rise with overburden pressure, and (3) changes in existing wrinkles caused by pressure. Comparative analysis of theoretical predictions with laboratory-scale model experiments validates the applicability of the energy method for characterizing geomembrane wrinkling behavior. Furthermore, the combined effects of temperature and overlying soil pressure on geomembrane wrinkles are quantitatively elucidated by model calculations. This work provides a theoretical basis and a reference for understanding the formation mechanism of geomembrane wrinkles and for developing corresponding engineering preventive measures.

高密度聚乙烯（HDPE）土工膜随着温度的升高容易起皱和变形，从而使垃圾填埋场复合衬底系统的接触条件和水力性能恶化。为了阐明温度和覆盖层压力共同作用下土工膜的皱折行为，本研究运用能量守恒原理，采用简化的二维模型，从理论上推导和分析了：(1)无覆盖层压力时温升引起的皱折形成，(2)有覆盖层压力时温升引起的皱折形成，以及(3)压力引起的既有皱折变化。理论预测与室内模型实验的对比分析验证了能量法表征土工膜起皱行为的适用性。此外，通过模型计算定量地阐明了温度和上覆土压力对土工膜起皱的共同影响。本研究为了解土工膜起皱的形成机理和制定相应的工程预防措施提供了理论依据和参考。

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引用次数: 0

Centrifuge model tests on Geostrip Reinforced Soil Walls with low-permeable backfills subjected to seepage 低渗透回填土工条加筋土墙渗流作用的离心模型试验

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2026-04-01 Epub Date: 2026-01-10 DOI: 10.1016/j.geotexmem.2026.01.003

B.V.S. Viswanadham, V.V. Turlapati, S.K. Bhattarai

The objective of this study is to employ centrifuge-based physical modeling to investigate the performance of geostrip reinforced soil walls (GSRSWs) constructed with low-permeable backfill subjected to seepage conditions. A 4.5 m radius large beam centrifuge facility at IIT Bombay was used to simulate a prototype GSRSW of height 10 m with a 6° batter angle at 40g. Geostrip - geosynthetic material comprising of a high tenacity polyester tendons core encased in a polymeric sheathing. Firstly, the scaling considerations essential for modeling geostrips in centrifuge model tests are presented. Based on the evolved scaling considerations, polyester based model geostrip reinforcement was developed and used in the present study. Influence of coverage ratio, R_c, was studied, keeping other physical characteristics of GSRSW the same. Results showcased GSRSW with a coverage ratio of 0.10 failed catastrophically after 12 days of seepage conditions with a maximum face movement of 0.377H at the penultimate stage. Increasing coverage ratio to 0.15 prevented a catastrophic failure and resulted in a maximum face movement of 0.035H after a sustained seepage of 30 days. Further, seepage and slope stability analysis were carried out, and the outcomes were found to be corroborate well with physically observed centrifuge test results.

本研究的目的是利用基于离心机的物理模型研究低渗透回填土工条加筋土墙（GSRSWs）在渗流条件下的性能。利用印度理工学院（IIT Bombay）的一个半径4.5 m的大束流离心机设备，模拟了高度为10 m的原型GSRSW，在40g时，面角为6°。土工带-土工合成材料，由高强度聚酯筋芯包裹在聚合物护套中。首先，提出了离心模型试验中geostrip建模必须考虑的尺度问题。基于不断发展的结垢考虑，开发了基于聚酯的土工带模型，并应用于本研究。在保持GSRSW其他物理特性不变的情况下，研究了覆盖度Rc的影响。结果表明，覆盖比为0.10的GSRSW在12 d渗流条件下发生了灾难性破坏，倒数第二阶段的最大面移为0.377H。将覆盖率提高到0.15，防止了灾难性的破坏，并在持续渗流30天后导致最大面移0.035H。进行了渗流分析和边坡稳定性分析，结果与物理观测的离心机试验结果吻合较好。

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引用次数: 0

Effect of temperature on the long-term interaction mechanism between geogrid and backfill 温度对土工格栅与回填体长期相互作用机制的影响

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2026-04-01 Epub Date: 2026-01-07 DOI: 10.1016/j.geotexmem.2026.01.001

Huaxin Han , Chengzhi Xiao , Nan Zhu , Jianguang Yin , Luqiang Ding , Xiangji Ye

Variations in backfill temperature affect the long-term interaction behavior between geosynthetic and surrounding soil in geosynthetic-reinforced soil (GRS) walls, which in turn influences their service life. To investigate such behavior, a novel testing apparatus was developed to examine the long-term mechanical response of GRS unit specimens (composed of PP geogrid and either dry sand or clay) and its influence on the lateral earth pressure developing under sustained vertical loading at five controlled temperatures. Test results demonstrated that under constant vertical normal stress applied to the backfill, the horizontal tensile force in the geogrid decreased over time in both unfrozen backfill types, with higher temperatures accelerating the reduction. Rising temperatures also increased strain concentration near the tensile end of the reinforcement. Additionally, the results revealed that existing GRS wall design guidelines based on Rankine earth pressure theory underestimate the horizontal reinforcement tensile force under low temperatures due to inaccurate estimations of lateral earth pressure. Accordingly, a correction factor was proposed to properly predict the lateral earth pressure based on the Rankine earth pressure at different temperatures and times. This study offers valuable insights that could contribute to enhancing the design of GRS walls in regions with extreme climate conditions.

回填温度的变化会影响土工合成加筋土（GRS）墙体中土工合成材料与周围土体的长期相互作用，进而影响其使用寿命。为了研究这种行为，开发了一种新的测试装置，以检测GRS单元试件（由PP土工格栅和干砂或粘土组成）在5种控制温度下持续垂直加载下的长期力学响应及其对侧土压力的影响。试验结果表明，在充填体竖向法向应力恒定的情况下，两种未冻结充填体的土工格栅水平拉伸力均随时间减小，且温度升高会加速减小。升高的温度也增加了钢筋受拉端附近的应变浓度。此外，基于Rankine土压力理论的现有GRS墙设计指南由于对侧向土压力的估计不准确，低估了低温下水平钢筋的抗拉力。在此基础上，提出了一种基于不同温度和时间的朗肯土压力的修正系数，以正确预测侧向土压力。该研究为加强极端气候条件下GRS墙的设计提供了有价值的见解。

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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 : 2026-04-01 Epub 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

Synergistic effects of enzyme-induced carbonate precipitation (EICP) treatment and geogrid reinforcement on mechanical properties of washed recycled sand 酶促碳酸盐沉淀（EICP）处理和土工格栅加固对水洗再生砂力学性能的协同效应

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2026-04-01 Epub Date: 2025-12-14 DOI: 10.1016/j.geotexmem.2025.12.005

Lian Liang, Ming Huang, Mingjuan Cui, Chaoxian Wang

EICP and geogrids are widely regarded as environmentally sustainable and effective techniques for soil stabilization. This study assesses the feasibility of combining EICP with geogrid reinforcement to improve the mechanical properties of sands. The Brazilian splitting test and particle image velocimetry were employed to investigate the effects of three independent variables—the cementation–enzyme ratio (X₁), median particle size (X₂), and geogrid placement (X₃)—on the mechanical behavior of sand treated with both EICP and geogrid (STEG). Response surface methodology was used to assess variable interactions and optimize parameters for maximum tensile strength. The mechanism of reinforcement was further investigated through measurements of calcium carbonate content, permeability testing, ultrasonic velocity analysis, and scanning electron microscopy (SEM). Results show that the interactions between variables significantly influence the tensile strength and failure patterns of STEG. The optimal parameters (X₁ = 1:1.935, X₂ = 1.211 mm, X₃ = 1.2 cm) achieved a tensile strength of 1.71 MPa. Compared with specimens without geogrids, STEG samples demonstrated higher peak and residual strengths. SEM results revealed substantial calcium carbonate precipitation around geogrids, enhancing interparticle bonding, increasing ultrasonic velocity, and reducing permeability. These findings highlight the potential of combining EICP and geogrids to improve the mechanical properties of cohesionless soils, offering promising applications for subgrade reinforcement.

EICP和土工格栅被广泛认为是环境可持续和有效的土壤稳定技术。本研究评估了EICP与土工格栅加固相结合改善砂土力学性能的可行性。采用巴西劈裂试验和颗粒图像测速法研究了胶结酶比（X1）、中位粒径（X2）和土工格栅位置（X3）这三个自变量对EICP和土工格栅（STEG）处理砂的力学行为的影响。响应面法用于评估变量相互作用并优化参数以获得最大抗拉强度。通过碳酸钙含量测定、渗透性测试、超声速度分析和扫描电子显微镜（SEM）进一步研究了增强机理。结果表明，变量之间的相互作用对STEG的抗拉强度和破坏模式有显著影响。最佳参数（X1 = 1:1.935, X2 = 1.211 mm, X3 = 1.2 cm）的拉伸强度为1.71 MPa。与未加土工格栅的土工格栅相比，STEG土工格栅的峰值强度和残余强度更高。扫描电镜结果显示，土工格栅周围有大量碳酸钙沉淀，增强了颗粒间的结合，增加了超声波速度，降低了渗透性。这些发现突出了将EICP和土工格栅结合起来改善无黏性土壤力学性能的潜力，为路基加固提供了有希望的应用。

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引用次数: 0