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 : 2026-01-30 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 : 2026-01-20 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

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 : 2026-01-20 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

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 : 2026-01-10 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

Static pullout behavior of a geogrid under cyclic normal loading 循环法向荷载作用下土工格栅的静力拉拔特性

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2026-01-08 DOI: 10.1016/j.geotexmem.2026.01.002

Wooseok Shin, Jonghyun Kim, Chungsik Yoo

This study investigates the effect of cyclic normal loading on the static pullout behavior of geogrids installed in compacted sandy soils. A series of laboratory pullout tests was performed where geogrid specimens were subjected to cyclic normal loads (CNL) with varying amplitudes. The results show that the geogrid pullout behavior under cyclic normal loading generally falls between those under the static normal stresses corresponding to the cyclic upper and lower normal stresses. For all baseline normal stress levels tested, there is a general trend of increasing peak pullout resistance with increasing CNL amplitude but with a strong dependency of the magnitude of increase on the baseline normal stress level. This observation highlights the importance of considering the cyclic amplitude in relation to baseline normal stress when estimating the pullout resistance of a geogrid under cyclic normal loading. Based on the test results, an equivalent normal stress approach incorporating cyclic amplitude mobilization factor was presented for evaluating the interaction coefficient under cyclic normal loading. The practical implications of the findings were also discussed.

研究了循环正常荷载对砂质土中土工格栅静力拉拔性能的影响。进行了一系列实验室拉拔试验，其中土工格栅试件受到不同振幅的循环法向荷载（CNL）。结果表明：循环法向荷载作用下土工格栅的拉拔性能一般介于循环上下法向应力对应的静力法向应力作用下的拉拔性能之间；对于所有测试的基线正常应力水平，随着CNL幅值的增加，峰值拉出阻力有增加的总体趋势，但增加幅度与基线正常应力水平有很强的依赖性。这一观察结果强调了在估计循环正常荷载作用下土工格栅的拉拔阻力时，考虑与基线法向应力相关的循环幅值的重要性。在试验结果的基础上，提出了考虑循环幅值动员因子的等效法向应力法来评估循环法向荷载作用下的相互作用系数。还讨论了研究结果的实际意义。

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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 : 2026-01-07 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

Experimental and analytical evaluation of enhanced interface efficiency with geocell anchor cages 土工格室锚笼增强界面效率的实验与分析评价

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-12-31 DOI: 10.1016/j.geotexmem.2025.12.006

Aarya Krishna, Gali Madhavi Latha

A new reinforcement concept of Geocell Anchor Cage (GAC) system has been recently proposed by the authors and its benefits in increasing the load carrying capacity and reducing the settlements are established. This paper evaluates the interface shear response of geocell-GACs in comparison to geocells and geocell-grid combinations through large direct shear tests. Results showed that the sand-geocell-GAC interface has shown an increased interface efficiency of 1.5 compared to an interface efficiency of 1.25 computed for the sand-geocell interface at a normal stress of 25 kPa. This difference is slightly reduced at higher normal stresses, but the GACs constantly showed higher interface efficiency compared to geocell and geocell-grid interfaces with sand. Further, interface shear tests were carried out with different geocell pocket sizes to confirm the beneficial effects of GACs and to understand the influence of relative size of geocells and anchor pins. The individual contributions of geocell, geogrid and pins in increasing the interface shear resistance are analytically quantified. Through Particle Image Velocimetry (PIV) analysis of videos captured during shear tests, particle movement and shear zone formations are compared to provide clues to the internal shear mechanisms and interactions involved.

作者最近提出了一种新的土工格室锚固笼（GAC）系统加固概念，并确定了其在提高承载能力和减少沉降方面的优势。通过大型直剪试验，对比土工格室和土工格室-栅格组合，评价了土工格室-栅格的界面剪切响应。结果表明，在法向应力为25 kPa时，砂土-土工格室- gac界面的界面效率提高了1.5，而砂土-土工格室界面的界面效率为1.25。在较高的法向应力下，这种差异略有减小，但与土工格室和土工格室-网格与砂的界面相比，GACs的界面效率一直较高。此外，还进行了不同土工格室袋尺寸的界面剪切试验，以证实gac的有益效果，并了解土工格室和锚钉相对尺寸的影响。分析量化了土工格室、土工格栅和销钉对增加界面剪切阻力的贡献。通过对剪切试验过程中捕获的视频进行颗粒图像测速（PIV）分析，比较了颗粒运动和剪切带形成，为内部剪切机制和所涉及的相互作用提供了线索。

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引用次数: 0

Sensing performance and mechanism of flexible sensing-enabled CB-CNT/PDMS geosynthetics for soil deformation monitoring 柔性传感CB-CNT/PDMS土工合成材料土壤变形监测的传感性能与机理

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-12-31 DOI: 10.1016/j.geotexmem.2025.12.007

Xinzhuang Cui , Shibao Lu , Xu Zhang , Qing Jin , Shiyuan Sun , Hui Li

Conventional soil deformation monitoring technologies often struggle to achieve distributed and high-precision measurements under large-strain conditions (>20 %), which are typical in geotechnical failures. To address this limitation, this study developed a novel flexible sensing-enabled geosynthetics material by incorporating a hybrid conductive filler system composed of carbon black (CB) and carbon nanotubes (CNT) into a polydimethylsiloxane (PDMS) matrix. Key fabrication parameters including the CB/CNT mass ratio, n-hexane dispersant content, and curing temperature were systematically optimized to enhance electrical conductivity and electromechanical response. The optimized composite exhibits excellent strain-sensing performance within the 0–20 % strain range, with a gauge factor (GF) of 2.453, a linear coefficient of determination (R²) of 0.972, and demonstrates outstanding signal stability and cyclic durability. Microstructural analyses revealed that the synergistic effect between CB and CNT facilitated the formation of a dense and stable conductive network, significantly improving sensing linearity and sensitivity. The feasibility of the material for practical application was validated through model tests on a sand foundation, where it accurately captured deformation patterns under various loading conditions. This work provides a reliable and sensitive flexible sensing solution for real-time monitoring of soil deformation, with broad potential in geotechnical health monitoring and early warning systems.

传统的土壤变形监测技术往往难以实现大应变条件下（> 20%）的分布和高精度测量，这在岩土工程破坏中是典型的。为了解决这一限制，本研究开发了一种新型的柔性传感土工合成材料，将由炭黑（CB）和碳纳米管（CNT）组成的混合导电填料系统整合到聚二甲基硅氧烷（PDMS）基体中。系统优化了炭黑/碳纳米管质量比、正己烷分散剂含量和固化温度等关键制备参数，以提高导电性能和机电响应。优化后的复合材料在0 ~ 20%应变范围内具有良好的应变传感性能，测量因子（GF）为2.453，线性决定系数（R2）为0.972，具有良好的信号稳定性和循环耐久性。微观结构分析表明，碳纳米管与碳纳米管之间的协同效应有助于形成致密稳定的导电网络，显著提高了传感线性度和灵敏度。通过砂基模型试验验证了该材料实际应用的可行性，该材料准确地捕捉了各种加载条件下的变形模式。该研究为实时监测土体变形提供了可靠、灵敏的柔性传感解决方案，在岩土健康监测和预警系统中具有广阔的应用前景。

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引用次数: 0

Improving the geotextile filter design criteria for internally unstable cohesionless soils 改进内不稳定无粘性土土工布过滤器设计标准

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-12-18 DOI: 10.1016/j.geotexmem.2025.12.004

Nicola Moraci , Stefania Bilardi , Maria Clorinda Mandaglio

The behaviour of a geotextile filter in contact with internally unstable cohesionless soils depends on interaction between filter pore size distribution and base soil particles and on fraction of particles free to move inside soil skeleton. These particles can accumulate at soil-filter interface leading to blinding or remain entrapped within filter pores leading to clogging or pass through geotextile. The openings of geotextile should allow the passing of soil particles not belonging to soil skeleton keeping the same stable to avoid base soil erosion and minimize the geotextile filter clogging and/or blinding. The upper limit of filter characteristic opening size meets requirement of retention criterion while the lower limit of filter avoids blinding and/or clogging phenomena. Among different geotextile filter design criteria for internally unstable cohesionless soils, Moraci (1996) criterion considers as lower limit of filtration opening size the critical diameter of suffusion. In this paper, a database of many soil-geotextile filtration tests, for which this criterion has not yet been tested, was created to assess its reliability, compared to other existing design criteria. Finally, a new methodology proposed recently by the Authors is also applied to evaluate internally unstable cohesionless soil-geotextile filter compatibility to all interfaces analysed in database.

土工布过滤器与内部不稳定的无黏性土壤接触时的行为取决于过滤器孔径分布与基土颗粒之间的相互作用以及在土壤骨架内自由移动的颗粒的比例。这些颗粒可以积聚在土壤-过滤器界面导致盲目或滞留在过滤器孔中导致堵塞或通过土工布。土工布的开口应允许不属于土骨架的土壤颗粒通过，保持相同的稳定性，以避免基层土壤侵蚀，并尽量减少土工布过滤器堵塞和/或盲目。滤波器特性开口尺寸的上限满足保留准则的要求，而滤波器的下限避免了盲目和/或堵塞现象。在不同的内不稳定无黏性土土工布过滤器设计准则中，Moraci（1996）准则将渗流临界直径作为滤孔尺寸的下限。在本文中，建立了一个数据库，其中包括许多尚未对该准则进行测试的土-土工织物过滤试验，以评估其与其他现有设计准则的可靠性。最后，本文还应用了作者最近提出的一种新方法来评价内部不稳定无粘性土-土工布滤料与数据库中分析的所有界面的兼容性。

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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 : 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