Geotextiles and Geomembranes最新文献_第5页

Field performance of erosion control on Lamtakong dam slopes using geocell and ruzi grass cover: A case study 土工格室与芦子草覆盖对兰竹洞坝坡面侵蚀控制的现场效果研究

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-12-01 Epub Date: 2025-08-26 DOI: 10.1016/j.geotexmem.2025.08.010

Nuttawut Thanasisathit , Supphanut Chuenjaidee , Panich Voottipruex , Pornkasem Jongpradist , Patara Kalayasri , Pitthaya Jamsawang

This study investigates the field performance of an integrated erosion control system combining geocell reinforcement and Ruzi grass cover on 30°, 45°, and 60° slopes at Lamtakong Dam, Thailand. Simulated rainfall intensities of 100, 130, and 170 mm/h were applied to assess the effects of geocell coverage patterns and vegetation maturity on runoff and sediment transport. Results show that full geocell coverage (C100) achieved the highest erosion resistance, reducing runoff and sediment by up to 90 % and 98 %, respectively. Partial coverage (C60 and C80) also proved effective, achieving comparable reductions (RRR of 60–75 % and SRR of 65–78 %) while offering cost-saving potential. Ruzi grass alone reduced sediment concentration by up to 75 % after 8 weeks, emphasizing the importance of vegetation maturity. Discontinuous geocell layouts performed similarly to continuous ones at equivalent coverage, indicating that total coverage area, not pattern, governs performance. A multiple regression model was developed to predict sediment reduction based on geocell coverage, Ruzi grass age, slope angle, and rainfall intensity, confirming the dominant influence of geocell coverage and vegetation maturity. The findings support the integrated system as a sustainable and scalable solution for erosion-prone slopes under varying environmental conditions.

本研究调查了泰国Lamtakong大坝30°、45°和60°边坡上结合土工格室加固和Ruzi草覆盖的综合侵蚀控制系统的现场性能。采用100、130和170 mm/h的模拟降雨强度来评估土工格室覆盖模式和植被成熟度对径流输沙的影响。结果表明，全土工格室覆盖（C100）达到最高的抗侵蚀能力，减少径流和泥沙分别高达90%和98%。部分覆盖（C60和C80）也被证明是有效的，在提供节约成本潜力的同时，实现了类似的减少（RRR为60 - 75%，SRR为65 - 78%）。8周后，仅如子草可使沉积物浓度降低75%，强调了植被成熟度的重要性。在相同的覆盖范围下，不连续的土工单元布局的表现与连续的土工单元布局相似，这表明控制性能的是总覆盖面积，而不是模式。建立了基于土工格室盖度、如子草年龄、坡角和降雨强度的多元回归模型预测减沙量，证实了土工格室盖度和植被成熟度的主导影响。研究结果表明，在不同的环境条件下，集成系统是一种可持续的、可扩展的解决方案，适用于易侵蚀的斜坡。

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引用次数: 0

Investigation on dewatering and reinforcement of dredged clay treated with SAP and PVD under vacuum preloading 真空预压下SAP和PVD处理的挖泥脱水加固研究

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-12-01 Epub Date: 2025-07-12 DOI: 10.1016/j.geotexmem.2025.07.004

Yupeng Cao , Xinzhuang Cui , Zhehao Qiu , Jie Yin , Pengfei Qi , Shuo Sun

This study investigates the dewatering and reinforcement performance of high-water-content dredged slurry using vacuum preloading combined with superabsorbent polymer (SAP) as a flocculant. Preliminary sedimentation experiments were conducted to compare the dewatering performance of different flocculants, and SAP was identified as the most effective additive for enhancing sedimentation. Laboratory vacuum preloading model tests were conducted on dredged clay treated with SAP and prefabricated vertical drain (PVD), to evaluate the effectiveness of SAP in enhancing the dewatering process. Results show that SAP enhances vacuum efficiency, leading to higher and faster vacuum pressure stabilization near the PVD. SAP-treated samples exhibited more rapid pore water pressure dissipation and accelerated water content reduction, particularly in the early stages. Post-treatment water content increased with distance from the PVD, but SAP improved overall drainage uniformity. Vane shear strength decreased with distance from the PVD but remained higher in SAP-treated samples, showing a linear correlation with normalized water content. SAP also influenced soil column formation, expanding its effective radius and reducing stabilization time. Two quantitative models were developed to predict shear strength and soil column radius variations under vacuum preloading with and without SAP. The radius of the soil column formed during vacuum preloading varied with depth, decreasing towards the bottom and increasing towards the surface. These findings provide valuable insights for optimizing vacuum preloading in dredged material treatment and soft soil improvement.

研究了真空预压结合高吸水性聚合物（SAP）作为絮凝剂对高含水率疏浚浆的脱水增强性能。通过初步沉降试验，比较了不同絮凝剂的脱水性能，确定SAP是最有效的絮凝剂。通过实验室真空预压模型试验，对SAP和预制垂直排水管（PVD）处理的疏浚粘土进行了试验，以评价SAP对疏浚粘土脱水过程的改善效果。结果表明，SAP提高了真空效率，使得PVD附近的真空压力稳定速度更快。sap处理的样品表现出更快的孔隙水压力消散和加速的含水量降低，特别是在早期阶段。处理后的含水率随着与PVD距离的增加而增加，但SAP改善了整体排水均匀性。叶片抗剪强度随着与PVD的距离而降低，但在经过sap处理的样品中保持较高，与归一化含水量呈线性相关。SAP还影响了土柱的形成，扩大了有效半径，缩短了稳定时间。建立了两个定量模型来预测真空预压和不加SAP下土柱抗剪强度和半径的变化。真空预压形成的土柱半径随深度变化，向底部减小，向表面增大。这些研究结果为疏浚材料处理和软土改良中真空预压的优化提供了有价值的见解。

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引用次数: 0

Effect of temperature on geogrid-facing connection force and lateral earth pressure based on innovative testing method 基于创新测试方法的温度对土工格栅连接力和侧土压力的影响

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-12-01 Epub Date: 2025-08-23 DOI: 10.1016/j.geotexmem.2025.08.007

Huaxin Han , Chengzhi Xiao , Jianguang Yin , Nan Zhu

Conventional geosynthetic-reinforced soil (GRS) retaining wall design guidelines focus on the horizontal reinforcement tensile force calculated based on lateral earth pressure under constant backfill temperature, while giving insufficient attention to the actual connection mechanism between the wall facing and the reinforcement. This limitation may impact the service life of retaining walls. In this study, a novel testing method was developed to simulate the differential settlement between the backfill and the facing within walls, enabling a new approach to quantify the reinforcement-facing connection force under various temperature conditions. Test results demonstrated that this connection force significantly exceeds the measured horizontal reinforcement tensile force under high vertical stress, and the ratio tends to increase with rising temperature under the same vertical stress. Additionally, the lateral earth pressure exerted on the wall back increases with the reinforcement stiffness, but it remains lower than the Rankine active earth pressure. At low temperatures, the conventional estimation method based on Rankine theory was shown to significantly underestimate the actual connection force. The study provides insights for the modification of the current GRS wall design guidelines.

传统的土工合成加筋土挡土墙设计指南侧重于在一定回填温度下，根据侧土压力计算水平钢筋受拉力，而对墙面与钢筋的实际连接机制关注不足。这种限制可能会影响挡土墙的使用寿命。本研究开发了一种新的试验方法来模拟墙内充填体与面板之间的差异沉降，为量化不同温度条件下的配筋面板连接力提供了一种新的方法。试验结果表明，在高竖向应力条件下，该连接力明显大于实测水平钢筋拉伸力，且在相同竖向应力条件下，该比值随温度升高而增大。加筋后墙侧土压力随加筋刚度增大而增大，但仍低于朗肯主动土压力。在低温下，传统的基于朗肯理论的估计方法明显低估了实际连接力。该研究为修改现行的GRS墙体设计指南提供了见解。

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引用次数: 0

Mitigating frost damage in cold region canals: performance evaluation of a two-layer geomembrane lining structure 缓解寒区水渠冻害：双层土工膜衬砌结构的性能评价

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-12-01 Epub Date: 2025-07-17 DOI: 10.1016/j.geotexmem.2025.07.008

Jianrui Ge , Yuncheng Yuan , Haoyuan Jiang , Zhengzhong Wang , Yi Wang , Min Xiao

To address frost damage to canal lining structures in arid and cold regions, this study proposes the use of a two-layer composite geomembranes (TLCGs) as a frost-heaving composite lining structure. To assess the performance of the two-layer geomembrane lining structure (TLCGLS), field tests were conducted. Considering the interaction between TLCGs and lining structure and canal foundation soil, a calculation model of canal frost heave is established based on the water-heat-force coupling theory of foundation soil. The stress of canal lining with single-layer composite geomembrane (SLCG), frictionless two-layer composite geomembranes (FTLCGS), and TLCGs under frost-heaving conditions is analyzed. The results indicate that TLCGLS can enhance the temperature of canal foundation soil by 7 % and decrease the water content by 12 %, thereby effectively mitigating canal deformation by 38 %. The TLCGs cushion under the canal lining can effectively release the tangential freezing constraint, so that the lining structure has certain flexibility, so as to prevent frost damage. Therefore, the reasonable use of TLCGs with appropriate friction and the setting of flexible structural joints can prevent frost damage.

为了解决干旱寒冷地区运河衬砌结构的冻害问题，本研究提出采用双层复合土工膜（tlcg）作为冻胀复合衬砌结构。为了评估双层土工膜衬砌结构（TLCGLS）的性能，进行了现场试验。考虑衬砌结构与渠道基础土的相互作用，基于基础土水-热-力耦合理论，建立了渠道冻胀计算模型。分析了冻胀条件下单层复合土工膜（SLCG）、无摩擦双层复合土工膜（FTLCGS）和TLCGs管道衬砌的应力。结果表明：TLCGLS可使运河地基土温度升高7%，含水率降低12%，有效缓解运河变形38%；运河衬砌下的tlcg垫层可以有效地解除切向冻结约束，使衬砌结构具有一定的柔韧性，从而防止冻损。因此，合理使用具有适当摩擦力的tlcg，并设置柔性结构缝，可以防止冻损。

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引用次数: 0

Evaluation of water removal capability of wicking nonwoven geotextiles 吸芯非织造土工布除水性能评价

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-12-01 Epub Date: 2025-06-10 DOI: 10.1016/j.geotexmem.2025.06.001

Minghao Liu , Jiming Liu , Sam Bhat , Rishi Gupta , Cheng Lin

Water accumulation in road bases and subgrade is one of the primary causes of road distress. To counteract this adverse impact, this study introduces a novel geosynthetic composite, consisting of biaxial polypropylene geogrids heat-bonded to wicking nonwoven geotextiles (WNWGs). This new composite integrates wicking capabilities with reinforcement. Unlike wicking woven geotextiles (WWGs), which rely on deep-grooved fibers for wetting and wicking, the wicking mechanism of WNWGs is primarily based on the microstructure and unique fiber orientation of the nonwoven geotextile component, further enhanced by proprietary chemical treatment to convert the fibers from hydrophobic to hydrophilic. This modification allows WNWGs to exhibit rapid wetting and wicking properties while preserving the large lateral drainage functionality of conventional nonwoven geotextiles. To assess the wicking performance of this material, a series of wicking tests were conducted in both water and saturated soils under controlled temperature and relative humidity. Additionally, contact angle measurements and microscopic analyses using Scanning Electron Microscopy (SEM) were conducted to elucidate the underlying wicking mechanisms. The results confirmed that the WNWGs possessed superior spontaneous and forced wetting and wicking capabilities compared to traditional nonwoven geotextiles. The findings offer valuable reference for evaluating the performance of the WNWG-geogrid composite.

道路基层和路基积水是造成道路病害的主要原因之一。为了抵消这种不利影响，本研究引入了一种新型土工合成复合材料，该复合材料由双轴聚丙烯土工格栅热粘合到吸芯非织造土工织物（WNWGs）组成。这种新型复合材料将排汗能力与强化相结合。与依靠深槽纤维进行润湿和排芯的吸湿编织土工布（wwg）不同，WNWGs的吸湿机制主要基于非织造土工布组分的微观结构和独特的纤维取向，并通过专有的化学处理将纤维从疏水性转化为亲水性进一步增强。这种修改允许WNWGs在保持传统非织造土工布的大侧向排水功能的同时，表现出快速润湿和排芯性能。为了评估该材料的排汗性能，在控制温度和相对湿度的条件下，在水和饱和土壤中进行了一系列的排汗试验。此外，还进行了接触角测量和扫描电子显微镜（SEM）显微分析，以阐明潜在的排芯机制。结果证实，与传统的非织造土工布相比，WNWGs具有优越的自发和强制润湿和排芯能力。研究结果为评价wnwg -土工格栅复合材料的性能提供了有价值的参考。

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引用次数: 0

Impact of test speed on the thermo-mechanical behavior of various types of geomembranes 试验速度对各类土工膜热力学性能的影响

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-12-01 Epub Date: 2025-08-25 DOI: 10.1016/j.geotexmem.2025.08.002

Hamza Tahir, Guillaume Stoltz, Guillaume Veylon, Laurent Peyras

Geomembranes in hydraulic structures are often in exposed conditions; the ambient temperature can vary significantly and hence influence their mechanical behavior. To determine their tensile behavior at various temperatures, unidirectional tensile tests can be performed in temperature-controlled chambers. However, the test speeds recommended by the main standards are high. Considering the elasto-visco-plastic behavior of geomembranes, the test speed has a double effect; the first comes from the viscous component and the second comes from temperature variation, due to the self-heating of the tested specimen during test. This study aims to investigate the effect of the test speed on the mechanical behavior of various geomembranes by decoupling the viscous effect and the self-heating effect. Through various unidirectional tensile tests performed on a wide range of test speeds, from 0.01 mm/min to 500 mm/min, it was found that for various tested geomembranes (HDPE, EPDM, PVC, FPO, Bituminous), the higher the test speed, the greater the tensile force at various strain levels and the greater the change in internal temperature of the specimen. Regarding the temperature effect, it was shown that for test speeds less than or equal to 10 mm/min, no self-heating of the specimen was observed for all geomembranes.

水工构筑物中的土工膜常处于暴露状态；环境温度变化很大，因此会影响它们的力学行为。为了确定它们在不同温度下的拉伸性能，单向拉伸试验可以在温控室中进行。然而，主要标准推荐的测试速度很高。考虑土工膜的弹粘塑性特性，试验速度具有双重效应；第一种来自粘性成分，第二种来自温度变化，这是由于测试过程中被测试样的自热造成的。本研究旨在通过解耦粘性效应和自热效应来研究测试速度对土工膜力学行为的影响。通过在0.01 mm/min ~ 500 mm/min较宽的试验速度范围内进行的各种单向拉伸试验，发现对于各种土工膜（HDPE、EPDM、PVC、FPO、沥青），试验速度越高，各应变水平下的拉伸力越大，试件内部温度变化越大。关于温度效应，结果表明，当测试速度小于或等于10 mm/min时，所有土工膜都没有观察到试样的自热现象。

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引用次数: 0

Filtration characteristics and mechanism of geotextile filters under cyclic flow 土工布过滤器在循环流作用下的过滤特性及机理

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-12-01 Epub Date: 2025-07-07 DOI: 10.1016/j.geotexmem.2025.07.001

Feifan Ren , Zhipeng Hu , Yuan Gao , Qiangqiang Huang , Xiaorui Qian

Geotextile filter layers are extensively utilized in revetment structures for riverbanks, floodwalls, and dams. These structures are often located in complex hydraulic environments, so geotextile filter layers may be subject to long-term cyclic flows. In this study, based on a self-developed gradient ratio test device, a series of gradient ratio tests under different hydraulic gradients and normal stresses were carried out to investigate the filtration characteristics and mechanisms of soil-geotextile systems under cyclic flow. The results show that the risk of particle erosion under cyclic flow is greater than the risk of system clogging, and the magnitude of hydraulic gradient and normal stress have an important influence on the filtration behavior. The boundary scour effect caused by the cyclic flow is proportional to the hydraulic gradient, while the normal stress enhances the retention of the soil through the benign geotextile blockage effect. The corresponding visual inspection analyses reveal that stable arching structures can be formed near the filter interface under cyclic flow, thus mechanically enhancing the stability of the system. These mechanisms suggest that strategic adjustments of the overburden pressure can optimize the structural stability of the soil-geotextile system in flood-prone environments.

土工布过滤层广泛应用于河岸、防洪墙和水坝的护岸结构中。这些结构通常位于复杂的水力环境中，因此土工布过滤层可能会受到长期循环流动的影响。本研究基于自行研制的梯度比试验装置，进行了一系列不同水力梯度和法向应力下的梯度比试验，研究循环流作用下土工织物-土工织物体系的过滤特性及机理。结果表明：循环渗流作用下颗粒侵蚀风险大于系统堵塞风险，水力梯度大小和法向应力对过滤行为有重要影响。循环流动引起的边界冲刷效应与水力梯度成正比，而正应力通过良性土工布堵塞作用增强土体的截留力。目测分析表明，在循环流动作用下，滤料界面附近可形成稳定的拱状结构，从而提高了系统的机械稳定性。这些机制表明，在洪水易发环境下，策略性地调整覆盖层压力可以优化土-土工织物系统的结构稳定性。

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引用次数: 0

Experimental and numerical analysis of wrapped geogrid-stabilized high-fill embankment: Seismic response and composite reinforcement mechanisms 包裹土工格栅稳定高填方路堤的试验与数值分析：地震反应与复合加固机制

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-12-01 Epub Date: 2025-07-08 DOI: 10.1016/j.geotexmem.2025.06.008

Weiting Deng , Xuanming Ding , Chunyan Wang , Changwei Yang , Zhenhua Ren , Qiang Ou , Ren Wang

This study investigated the seismic response and reinforcement mechanism of high-fill embankment reinforced with geogrid and pile-slab structure through shaking table tests and numerical method. Experimental results demonstrated that the geogrid-reinforced composite embankment can still maintain structural integrity under high-intensity seismic loading (PGA ≥0.8g), exhibiting only surface cracking and localized soil extrusion. The acceleration amplification factor (AAF) exhibited both “elevation effect” and “surface tendency effect”, while strain distribution in the pile-slab structure followed characteristic arch-shaped and M-shaped patterns. Geogrid reinforcement effectively constrained soil deformation and redistributed stresses, delaying the development of pile bending moment and embankment displacement. Its reinforcement efficiency increased with seismic intensity. Validated numerical models reproduced shear strain localization-induced cracking at both embankment surfaces and embankment-accumulation interfaces. Shear strain propagation exhibited a progressive inward expansion from the embankment surface under seismic excitation. Parametric studies further revealed that reducing geogrid spacing can improve constraint effects, minimize displacement, and mitigate internal shear deformation. These findings underscore the synergistic role of geogrids and pile-slab structures in redistributing seismic thrust forces, offering critical insights for optimizing reinforcement strategies in seismically active regions.

通过振动台试验和数值计算方法，研究了土工格栅加桩-板结构高填方路堤的地震反应及加固机理。试验结果表明，在高烈度地震荷载（PGA≥0.8g）下，土工格栅加筋复合路堤仍能保持结构完整性，仅表现为表面开裂和局部土体挤压。加速度放大因子（AAF）同时表现出“高程效应”和“表面倾向效应”，而桩-板结构的应变分布则呈现出典型的拱形和m型特征。土工格栅加固有效地约束了土体变形和应力的重新分布，延缓了桩弯矩和路堤位移的发展。其配筋效率随地震烈度增大而增大。经过验证的数值模型再现了路堤表面和路堤-堆积界面剪切应变局部化引起的裂缝。在地震作用下，路堤表面的剪切应变向内扩展。参数化研究进一步表明，减小土工格栅间距可以改善约束效应，减少位移，减轻内部剪切变形。这些发现强调了土工格栅和桩板结构在重新分配地震推力方面的协同作用，为优化地震活跃地区的加固策略提供了重要见解。

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引用次数: 0

Experimental study on the wicking performance of a wicking geotextile in coarse-grained soils under freezing-thawing actions 冻融作用下吸湿土工布在粗粒土中的吸湿性能试验研究

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-12-01 Epub Date: 2025-07-10 DOI: 10.1016/j.geotexmem.2025.06.009

Zhilang You , Jian Xu , Hua Liu , Zhichao Zhang , Yang Peng

The effectiveness of a self-developed wicking geotextile under different freezing-thawing cycles (0, 1, 3, 5, 10) in draining water from the coarse-grained railways soils with varying initial water contents (12 %, 15 %, 18 %, and 21 %) and fine contents (5 %, 10 %, 15 %, 20 %, 30 %) was evaluated using a series of vertical wicking tests. Results show that: 1) the wicking geotextile demonstrated efficient vertical water drainage from coarse-grained soils, with its performance significantly influenced by soil properties (initial water content and fine content) and freezing-thawing cycles; 2) the maximum liquid vertical wicking heights (LVWHs) of the wicking geotextiles in the coarse-grained soils increased with the increasing initial water contents but decreased with the increasing fine contents; 3) with the increase in freezing-thawing cycles, the maximum LVWHs of the wicking geotextiles in coarse-grained soils demonstrated a two-stage decline (first decreasing rapidly, then slowing down) before stabilizing at a constant value. Based on the microstructures, the mechanisms by which the initial water contents, fine contents, and freezing-thawing cycles affected the wicking performance were qualitatively analyzed and discussed. This study contributes to frost heave prevention of coarse-grained soils in cold regions.

在不同的冻融循环（0、1、3、5、10）条件下，对不同初始含水率（12%、15%、18%、21%）和不同细粒含水率（5%、10%、15%、20%、30%）的粗粒铁路土壤土进行了垂直吸湿试验，评价了自主研制的吸湿土壤布的排水效果。结果表明：1)吸湿土工布在粗粒土中具有良好的垂直排水性能，其性能受土壤性质（初始含水量和细粒含水量）和冻融循环的显著影响；2)在粗粒土中，吸水土工布的最大液体垂直吸水高度（LVWHs）随初始含水量的增加而增大，随细粒土含水量的增加而减小；3)随着冻融循环次数的增加，粗粒土中吸湿土工布的最大LVWHs呈现先快速下降后缓慢下降的两阶段下降趋势，最后稳定在一个恒定值。在微观结构的基础上，定性分析和讨论了初始含水量、细粒含量和冻融循环对吸湿性能的影响机理。该研究对寒地粗粒土的冻胀防治具有一定的指导意义。

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引用次数: 0

Reinforcement effectiveness of stacked prefabricated vertical drain (S-PVD) vacuum preloading method: A case study 堆垛预制垂直排水管（S-PVD）真空预压加固效果的实例研究

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-12-01 Epub Date: 2025-06-19 DOI: 10.1016/j.geotexmem.2025.06.004

Huayang Lei , Jiankai Li , Shuangxi Feng , Tianlu Ma , Guoqing Zhang , Shengpeng Yu

To address the issue of vacuum pressure attenuation in traditional vacuum preloading ground reinforcement methods, this study proposes a stacked prefabricated vertical drain (S-PVD) vacuum preloading method based on the stratified sealing drainage technology. A comprehensive field test was conducted to comparatively analyze the reinforcement effectiveness of three vacuum preloading approaches: conventional prefabricated vertical drains (PVDs), reverse prefabricated vertical drains (R-PVDs), and the novel S-PVDs. Test results demonstrate that the S-PVD method not only significantly enhances the ground reinforcement effect, effectively increasing surface settlement and vane shear strength of the soil, but also improves the uniformity of the reinforced soil, with only a 4.6 % difference in the vane shear strength between the top and bottom of the drainage board. In addition, the S-PVD method can meet the unloading criteria in less than 30 days, reducing the consolidation period by 34.1 %. The optimized S-PVD system demonstrates notable cost-effectiveness through energy-efficient operation and accelerated consolidation, achieving 26.5 % reduction in unit area cost of materials and electricity compared to conventional vacuum preloading. These findings suggest that the S-PVD method represents a promising innovation in deep soil stabilization technology, offering a technically and economically viable solution for soft ground improvement in coastal regions.

针对传统真空预压地面加固方法存在的真空压力衰减问题，提出了一种基于分层密封排水技术的堆叠预制垂直排水（S-PVD）真空预压方法。通过现场综合试验，对比分析了传统预制垂直排水管（PVDs）、反向预制垂直排水管（R-PVDs）和新型S-PVDs三种真空预压方式的加固效果。试验结果表明，S-PVD法不仅显著增强了地基加固效果，有效提高了土体的地表沉降和叶片抗剪强度，而且改善了加筋土的均匀性，排水板顶部和底部的叶片抗剪强度仅相差4.6%。此外，S-PVD法可在30天内达到卸载标准，将固结周期缩短34.1%。优化后的S-PVD系统具有显著的成本效益，通过节能操作和加速固化，与传统真空预压相比，单位面积材料和电力成本降低了26.5%。这些研究结果表明，S-PVD方法代表了深土稳定技术的一个有前途的创新，为沿海地区软土地基的改善提供了技术和经济上可行的解决方案。

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引用次数: 0