Geotextiles and Geomembranes最新文献_第6页

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 : 2025-07-12 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

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 : 2025-07-10 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

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 : 2025-07-08 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 analysis of the influence of drainage board diameter coefficient on sludge treatment combining horizontal drain-vacuum preloading with geomembrane bags 排水板直径系数对水平排水-真空预压结合土工膜袋处理污泥影响的实验分析

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-07-08 DOI: 10.1016/j.geotexmem.2025.07.002

Jun Wang , Chenglong Gu , Xiaobing Li , Hongtao Fu , Junfeng Ni , Ziyang Gao , Long Wang

In the combined method of horizontal drainage board vacuum preloading and sealed geomembrane bags, the horizontal drainage board serves as the sole drainage channel, making its diameter coefficient critical in determining the appropriate filling height. Based on the theoretical model for vertical drainage boards, this study analyzes the influence range of a horizontal drainage board using the sealed geomembrane bag method. Model tests show that the maximum influence diameter coefficient of the horizontal drainage board lies between 24.6 and 25.3. By referencing the minimum influence diameter coefficient typically used for vertical drains, the applicable range for horizontal drainage boards in sealed geomembrane bags is suggested to be 15.0 to 25.3. Results also reveal that the upper slurry layer drains more efficiently than the lower layer due to gravity-assisted downward flow. In contrast, upward drainage in the lower zone is less effective. Adding a drainage board at the bottom creates a direct flow path and improves consolidation in the lower zone. To mitigate clogging during testing, the drainage board was embedded in geotextile, which reduced clogging to some extent. However, as clogging is difficult to avoid in practice, the proposed coefficient does not account for its effects.

在水平排水板真空预压与密封土工膜袋组合方法中，水平排水板作为唯一的排水通道，其直径系数对确定合适的填充高度至关重要。基于垂直排水板的理论模型，分析了密封土工膜袋法对水平排水板的影响范围。模型试验表明，水平排水板的最大影响直径系数在24.6 ~ 25.3之间。参考垂直排水管通常使用的最小影响直径系数，建议密封土工膜袋装水平排水板的适用范围为15.0 ~ 25.3。结果还表明，由于重力辅助下向流动，上层浆体比下层浆体排水效率更高。相反，下部区域向上排水效果较差。在底部添加排水板可以创造直接的流动路径，并改善下部区域的固结。为了减少测试过程中的堵塞，将排水板嵌入土工布中，在一定程度上减少了堵塞。然而，由于堵塞在实践中是难以避免的，所提出的系数并没有考虑其影响。

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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 : 2025-07-07 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

The effect of physical-chemical combined clogging on the area density and permeability of geotextile envelopes for subsurface drainage systems in arid regions 干旱区地下排水系统中物化复合堵塞对土工布围护层面积密度和渗透性的影响

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-07-03 DOI: 10.1016/j.geotexmem.2025.06.006

Shuai Qin , Chenyao Guo , Jingwei Wu , Shuai He , Haoyu Yang , Chenzhi Yao , Xinman Jiang , Hang Li

This study investigates the morphological characteristics, development process, and impact on permeability of physical-chemical combined clogging on geotextile envelopes, through laboratory experiments involving particle flow coupled with chemical precipitation. The results show that there is a synergistic effect between physical clogging caused by soil particle accumulation and chemical clogging due to salt precipitation. Chemical precipitation exacerbates physical clogging, while physical clogging promotes the formation of chemical precipitation. The chemical precipitates on the upstream of the geotextile envelope binds the particles to each other and to the fibers of the geotextile envelope, while on the downstream, precipitates tends to encapsulate the fibers, with less physical clogging. After combined clogging, the permeability coefficient of the geotextile envelope decreases rapidly with the increasing of the clogging material, and then decreases slowly. When the area density of the clogging material is less than 91.02 g/m², it shows a linear decrease, and then followed by a logarithmic decrease. Physical-chemical combined clogging is more severe than single physical or chemical clogging. After the permeability stabilizes, for the same clogging mass, the decrease in permeability caused by combined clogging is 1.2 times and 2 times greater than that caused by physical and chemical clogging, respectively.

本研究通过颗粒流耦合化学沉淀的室内实验，研究了土工布围护结构物理-化学复合堵塞的形态特征、发展过程及其对渗透性的影响。结果表明，土壤颗粒堆积引起的物理堵塞与盐降水引起的化学堵塞之间存在协同效应。化学沉淀加剧了物理堵塞，而物理堵塞促进了化学沉淀的形成。在土工布围护结构的上游，化学沉淀物使颗粒相互结合，并与纤维结合，而在下游，沉淀物倾向于包裹纤维，物理堵塞较少。复合堵塞后，随着堵塞材料的增加，土工布围护结构的渗透系数迅速下降，然后缓慢下降。当堵料的面积密度小于91.02 g/m2时，堵料面积密度先呈线性减小，然后呈对数减小。物理-化学复合堵塞比单一的物理或化学堵塞更为严重。在渗透率稳定后，对于相同堵塞质量，复合堵塞对渗透率的影响分别是物理堵塞和化学堵塞的1.2倍和2倍。

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引用次数: 0

Analytical solution of freeze-thaw pretreatment combined with step vacuum preloading for sludge consolidation and dewatering 冻融预处理结合阶梯真空预压污泥固结脱水的解析解

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-06-30 DOI: 10.1016/j.geotexmem.2025.06.005

Xudong Zhang , Zhenggao Xu , Yajun Wu , Peng Ye , Xueke Zang , Jinhong Wu

A significant amount of sludge is generated worldwide every day, characterized by its high moisture content. This study investigates the impact of freeze-thaw cycles and step vacuum preloading on sludge dewatering and volume reduction. It also analyzes the effects of different loading methods to address challenges associated with sludge dewatering. Based on Hansbo's consolidation theory, equations for excess pore water pressure and the degree of consolidation under step vacuum loading are derived, and the experimental results are predicted. A conversion coefficient, r, was introduced to measure the degree of clogging in the drainage board. The results indicate that step vacuum loading is more effective for sludge drainage and volume reduction. Additionally, the theoretical predictions accurately reflect the experimental outcomes, providing a solid theoretical foundation for the feasibility of employing step vacuum preloading in engineering applications.

每天在世界范围内产生大量的污泥，其特点是其高水分含量。研究了冻融循环和阶梯真空预压对污泥脱水和减容的影响。它还分析了不同加载方法的影响，以解决与污泥脱水相关的挑战。基于Hansbo固结理论，推导了阶梯真空加载下的超孔隙水压力和固结度方程，并对试验结果进行了预测。引入转换系数r来衡量排水板的堵塞程度。结果表明，分级真空加载对污泥的排泥和减容效果更好。理论预测准确地反映了实验结果，为在工程应用中采用阶梯真空预压的可行性提供了坚实的理论基础。

引用次数: 0

Optimization and performance analysis of novel waste EPS bead-sand composite cushions for rockfall mitigation: An integrated experimental and numerical study 新型废EPS珠砂复合岩崩缓冲垫优化与性能分析：实验与数值综合研究

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-06-30 DOI: 10.1016/j.geotexmem.2025.06.007

Hani Meree , Dongpo Wang , Shuaixing Yan , Stéphane Lambert , Yanhao Chen , Qi Dong

Orthogonal Experimental Design (OED) and Response Surface Methodology (RSM) optimized waste Expanded Polystyrene (EPS) bead-sand composite cushions, identifying an optimal EPS content of 38.79 % by volume for superior energy absorption and load distribution. The novel SE-S-F layered configuration (EPS-sand mixture over pure sand) reduced RC slab tension damage by 79.7 % compared to traditional sand cushions and crack width by 92.3 % relative to the EPS-sand mixture, surpassing monolithic designs. It minimized transmitted forces, accelerations, and energy dissipation while promoting flexural cracking for enhanced structural protection. Validated numerical simulations accurately modeled impact dynamics, enabling reliable performance predictions. Successive impact tests confirmed the SE-S-F configuration's multi-impact resistance, achieving a non-dimensional factor (Ω) of 1.47 by the fifth impact, outperforming geofoam-based designs. Repurposing waste EPS, this approach delivers lightweight, sustainable, and cost-effective rockfall protection systems, enhancing safety in mountainous regions and transportation corridors.

利用正交试验设计（OED）和响应面法（RSM）对废旧膨胀聚苯乙烯（EPS）珠砂复合材料垫块进行了优化设计，确定EPS的最佳体积含量为38.79%，具有较好的能量吸收和负荷分配效果。与传统的砂垫层相比，新型SE-S-F分层结构（eps -砂混合物在纯砂上）将RC板的拉伸损伤减少了79.7%，与eps -砂混合物相比，裂缝宽度减少了92.3%，超过了单一设计。它最大限度地减少了传递力，加速度和能量耗散，同时促进弯曲开裂，增强结构保护。经过验证的数值模拟准确地模拟了撞击动力学，实现了可靠的性能预测。连续的冲击测试证实了SE-S-F结构的多重抗冲击性，在第五次冲击时实现了1.47的无因次系数（Ω），优于基于土工布泡沫的设计。通过重新利用废弃EPS，该方法提供了轻质、可持续、经济高效的岩崩防护系统，提高了山区和交通走廊的安全性。

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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 : 2025-06-19 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

Consolidation analysis of staged-filled soil slurry with combined grid-horizontal and vertical drains system under vacuum preloading 真空预压下格栅-水平-垂直复合排水系统阶段填土浆体固结分析

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-06-19 DOI: 10.1016/j.geotexmem.2025.06.003

Ding-Bao Song , Yu Pan , Jian-Hua Yin , Zhen-Yu Yin , He-Fu Pu

This study presents a combined method utilizing grid-horizontal drains assisted by vacuum preloading for initial treatment, and vertical drains with vacuum preloading for further enhancement, aimed at the beneficial reuse of dredged marine sediments as fill material. A novel method for analyzing the consolidation of staged-filled soft soils with grid-horizontal and vertical drains under vacuum preloading is established, and a numerical model, called Combined-drains Consolidation Settlement (CCS), is developed. CCS accounts for staged filling, drain combinations, creep strains, hydraulic conductivity anisotropy, vertical and radial flows, smear effects, time-dependent surcharge and/or vacuum loading, and variable compressibility and hydraulic conductivity throughout the consolidation process. A large-scale laboratory consolidation test is presented, focusing on staged-filled marine sediments treated by the combined system, demonstrating beneficial reuse potential of high-water-content dredged sediments. Settlement and water content predictions using CCS agree well with experimental results. The effects of paving rate (lateral spacing) and the number of grid-horizontal drain layers (vertical spacing) are evaluated using the CCS model. Based on these results, cost-effective design recommendations are proposed. Comparison of treatment efficiency shows the combined method significantly enhances improvement by enabling earlier application of vacuum consolidation than the PVD-only method.

本研究提出了一种组合方法，利用真空预压辅助的网格水平排水沟进行初始处理，并进一步加强真空预压的垂直排水沟，旨在将疏浚的海洋沉积物作为填充物有益地再利用。建立了一种分析真空预压条件下具有水平和垂直排水沟的阶段填筑软土固结的新方法，并建立了排水沟固结沉降（CCS）数值模型。CCS考虑了阶段充填、排水组合、蠕变应变、水力导电性各向异性、垂直和径向流动、抹片效应、随时间变化的附加物和/或真空载荷，以及整个固结过程中的可变压缩性和水力导电性。本文提出了一项大型实验室固结试验，重点研究了联合系统处理的分级填充海洋沉积物，证明了高含水量疏浚沉积物的有益再利用潜力。利用CCS预测沉降和含水量与实验结果吻合较好。利用CCS模型对铺装率（横向间距）和栅格-水平排水层数（垂直间距）的影响进行了评价。基于这些结果，提出了具有成本效益的设计建议。通过对处理效率的比较表明，与单独的pvd方法相比，组合方法可以更早地应用真空固结，从而显著提高了处理效率。

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引用次数: 0