Geotextiles and Geomembranes最新文献_第4页

Predictive modeling of lateral pressure in geotextile flexible casings for karst pile construction 岩溶桩施工中土工织物柔性套侧压力预测建模

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-09-16 DOI: 10.1016/j.geotexmem.2025.08.011

Tengyun Xue , Liang Xiao , Pengpeng Ni , Runxing Rao , Chaofeng Zeng , Guoxiong Mei

In modern geotechnical engineering, geotextile-integrated flexible casings have gained prominence over conventional steel counterparts for concrete containment in karst pile construction, primarily due to their economic advantages and operational simplicity. However, the dynamic behavior of casing lateral pressure development during concrete placement—a fundamental design consideration—has not been thoroughly elucidated, creating uncertainties in engineering practice. This study systematically investigates three key operational parameters through laboratory experiments: casing material characteristics, permeability performance, and concrete placement methods. The research yields two critical advancements: (1) Casing material and discontinuous casting significantly govern the maximum lateral pressure, whereas permeability predominantly regulates post-placement pressure dissipation patterns. Engineering specifications should therefore emphasize the integration of low-strain geotextiles with permeability characteristics and discontinuous placement methods. (2) An innovative predictive model has been developed, synthesizing material properties, permeability performance, and concrete placement methods. Field tests in a karst region show that the proposed model reduces lateral pressure estimates by 42 % compared to traditional hydrostatic designs while maintaining structural safety. These findings establish essential guidelines for performance-oriented design of flexible geotextile containment systems in geologically complex environments.

在现代岩土工程中，土工织物集成柔性套管由于其经济优势和操作简单，在岩溶桩施工中比传统的钢筋混凝土围护结构得到了突出的应用。然而，在混凝土浇筑过程中套管侧压力发展的动态行为——一个基本的设计考虑——并没有完全阐明，这在工程实践中造成了不确定性。本研究通过室内实验系统研究了套管材料特性、渗透性能和混凝土浇筑方法三个关键操作参数。研究取得了两项重要进展：(1)套管材料和不连续浇铸对最大侧向压力有显著影响，而渗透率主要调节放置后压力消散模式。因此，工程规范应强调具有渗透性特性的低应变土工布与不连续放置方法的结合。(2)建立了一种创新的预测模型，综合了材料性能、渗透性能和混凝土浇筑方法。在喀斯特地区的现场试验表明，与传统的静压设计相比，该模型在保持结构安全的同时，侧压力估算值降低了42%。这些发现为复杂地质环境中柔性土工布围护系统的性能导向设计建立了重要的指导方针。

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引用次数: 0

Sorption and water distribution performances of a geosynthetic sheet used in naturally contaminated soils management 土工合成片材在自然污染土壤治理中的吸附和配水性能

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-09-06 DOI: 10.1016/j.geotexmem.2025.09.001

Yu Zhang , Yosuke Kinoshita , Tomohiro Kato , Atsushi Takai , Takeshi Katsumi

A novel hydrotalcite-coated geosynthetic sorption sheet shows potential for managing geogenic contamination in excavated soils and rocks. Employed in an attenuation layer, it retains contaminants in leachate before infiltration into surrounding soil. This study evaluates the arsenic (As) sorption efficiency and water distribution performance of this geosynthetic material to assess its field applicability. Batch experiments were conducted across a pH range of 3–9, temperatures of 5–40 °C, and with co-existing ions (HCO₃⁻, SO₄²⁻ at 0–500 mg/L). Results demonstrated effective removal of both As(III) and As(V), with higher efficiency for As(V). While pH, co-existing ions, and temperature had minimal effect on As(V) removal, they significantly influenced As(III) removal. Specifically, As(III) sorption efficiency decreased by 15 % as pH decreased from 9 to 3. The presence of HCO₃⁻ and SO₄²⁻ reduced As(III) removal due to competition for sorption sites. Removal efficiency slightly improved at 40 °C due to the endothermic nature of the sorption process. Soil tank experiments indicated that soil particle size was the dominant factor controlling water retention and drainage patterns. Coarse sand promoted concentrated flow, while finer sands enhanced retention and dispersion. The geosynthetic sorption sheet showed only a limited hydraulic influence under the tested conditions.

一种新型的水滑石包覆的土工合成吸附片显示了处理开挖土壤和岩石中的地质污染的潜力。在衰减层中使用，它在渗透到周围土壤之前保留渗滤液中的污染物。本研究对该土工合成材料的砷吸附效率和配水性能进行了评价，以评价其现场适用性。批量实验在pH为3-9，温度为5-40°C，并与共存离子（0-500 mg/L的HCO3−，SO42−）进行。结果表明，As（III）和As(V)都能有效去除，其中As(V)的去除效率更高。pH、共存离子和温度对As(V)的去除影响最小，但对As（III）的去除影响显著。特别是，当pH值从9降低到3时，As（III）的吸附效率降低了15%。由于竞争吸附位点，HCO3−和SO42−的存在降低了As（III）的去除。由于吸附过程的吸热性质，在40°C时去除效率略有提高。土壤槽试验表明，土壤粒径是控制土壤保水和排水方式的主要因素。粗砂促进集中流动，细砂增强滞留和分散。在测试条件下，土工合成吸附片仅显示有限的水力影响。

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引用次数: 0

A simple 3D orthotropic model for the tensile response of geogrids: In-isolation and soil–geogrid interaction applications 土工格栅拉伸响应的简单三维正交各向异性模型：隔离和土-土工格栅相互作用的应用

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-08-29 DOI: 10.1016/j.geotexmem.2025.07.010

Lucas Paiva , Margarida Pinho-Lopes , Robertt Valente , António Miguel Paula

The short-term tensile response is one of the key aspects in designing geogrid-reinforced soil structures. In this paper a simple data-driven 3D orthotropic model for the short-term tensile response is proposed. The Hill48 yield model is chosen to represent the orthotropic behaviour of the geogrid, and a procedure to obtain the necessary parameters, from simple tensile test data, is presented. The model is then implemented in ABAQUS, and validated against a realistic problem where the geogrid is embedded in soil. The influence of the orthotropy (against isotropy) on both the reinforcement and the overall soil–geogrid structure is evaluated. The results show that the orthotropic model can accurately predict the tensile response of the geogrid in different directions, with the orthotropy having a significant influence on the reinforcement and the overall structural response, especially in highly orthotropic materials. The study further examined stress redistribution capabilities in geogrids with notches, revealing enhanced stabilization performance using the orthotropic model. Parametric tests indicated that traditional isotropic assumptions might underpredict or overpredict reinforcement performance, emphasizing the advantages for accurate orthotropic characterization. The proposed 3D framework provides a robust, straightforward method for evaluating and optimizing geogrid designs, enabling better prediction of reinforced soil behaviour in geotechnical applications.

短期拉伸响应是土工格栅加筋土结构设计的关键问题之一。本文提出了一种简单的数据驱动的三维正交各向异性短期拉伸响应模型。选择Hill48屈服模型来表示土工格栅的正交各向异性行为，并给出了从简单拉伸试验数据中获得必要参数的过程。然后在ABAQUS中实现该模型，并针对土工格栅嵌入土中的实际问题进行验证。评价了正交异性（相对于各向同性）对加固和整体土工格栅结构的影响。结果表明：正交各向异性模型能准确预测土工格栅在不同方向上的拉伸响应，且正交各向异性对配筋和整体结构响应有显著影响，特别是在高正交各向异性材料中。该研究进一步研究了带缺口的土工格栅的应力再分布能力，揭示了使用正交各向异性模型增强的稳定性能。参数测试表明，传统的各向同性假设可能会低估或高估钢筋性能，强调准确的正交各向异性表征的优势。提出的3D框架为评估和优化土工格栅设计提供了一种强大、直接的方法，能够更好地预测土工应用中的加筋土行为。

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引用次数: 0

Methods for mitigating effect of apparent clogging in vacuum consolidation and analysis technics – a review 缓解真空固结中明显堵塞影响的方法及分析技术综述

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-08-28 DOI: 10.1016/j.geotexmem.2025.08.004

Jinchun Chai , Yafei Qiao , Wenqi Ding , Liangjin Li , Takenori Hino

To increase the efficiency and design accuracy of vacuum consolidation of clayey slurries with prefabricated vertical drains (PVDs) or prefabricated horizontal drains (PHDs), methods for mitigating apparent clogging around PVDs/PHDs, and consolidation solutions considering the effect of the apparent clogging are reviewed/analyzed. Methods for mitigating the effect of apparent clogging has been clarified as thermal, physical and chemical ones. For each method, its work mechanism is explained and its effectiveness is evaluated qualitatively/quantitatively. Recently published solutions for a PVD/PHD unit cell consolidation considering mechanical and/or geometrical non-linearities are summarized. Except technics adopted for modelling the non-linearities, other options considered in the solutions are: (i) Darcian or non-Darcian flow; (ii) equal strain or free strain; (iii) considering creep or not; and (iv) time dependent load or constant load. Further, an incremental imaginary time method has been described in certain detail for solving non-linear PVD/PHD unit cell consolidation with time dependent loads. It has been demonstrated that the method is a pragmatic and versatile one.

为了提高预制垂直排水管和预制水平排水管对粘土浆料的真空固结效率和设计精度，本文综述和分析了缓解预制垂直排水管和预制水平排水管周围表观堵塞的方法，以及考虑表观堵塞影响的固结方案。减轻明显堵塞影响的方法已澄清为热、物理和化学方法。对于每种方法，都解释了其工作机制，并对其有效性进行了定性/定量评价。总结了最近发表的考虑力学和/或几何非线性的PVD/PHD单元胞固结解决方案。除了非线性建模所采用的技术外，解决方案中考虑的其他选项有：(i)达西或非达西流动；（ii）等应变或自由应变；（iii）是否考虑蠕变；（四）随时间变化的负荷或恒定负荷。此外，还详细描述了一种增量虚时间方法，用于求解具有时间相关载荷的非线性PVD/PHD单元胞固结。实践证明，该方法实用、通用性强。

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引用次数: 0

Full-scale experiment and numerical studies on vertical impact characteristics of reinforced embankment 加筋路堤竖向冲击特性的全尺寸试验与数值研究

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-08-28 DOI: 10.1016/j.geotexmem.2025.08.009

Bo Chen , Liang Lu , Zongjian Wang , Shuwen Ma , Katsuhiko Arai

Reinforced embankments offer advantages including reduced settlement, environmental friendliness and substantial protection against rockfall hazards. However, current research primarily focuses on the impact response of the upstream facing of reinforced embankments against rockfalls, while neglecting the influence of vertical rockfall impacts on embankment design and analysis. This study investigates deformation characteristics and load transfer mechanisms of reinforced embankment under vertical rockfall impacts through a full-scale experiment. Furthermore, based on the full-scale experiment, a validated numerical model was developed, enabling a parametric analysis of the effects of reinforcement cross-sectional configurations, rock shapes, impact energy and impact points on embankment performance. The findings indicate that reinforced embankments exhibit excellent impact resistance, exhibiting two distinct deformation patterns upon impact that are primarily influenced by impact point, impact energy and reinforcement cross-sectional configuration. Rockfalls with smaller aspect ratios tend to achieve greater penetration depths while causing limited disturbance to the embankment. When maintaining equivalent aspect ratios, flatter rock geometries generate stronger impact forces and cause more significant damage to the embankment structure. The insights from this study provide a basis for verifying and improving the current impact-resistance design of reinforced embankments, offering significant implications for enhancing the safety and functionality of such structures.

加固路堤的优点包括减少沉降、环境友好和对落石危险的实质性保护。然而，目前的研究主要集中在加筋土路堤上游面对落石的冲击响应，而忽略了垂直落石冲击对路堤设计和分析的影响。通过全尺寸试验，研究了竖向落石冲击下加筋路堤的变形特征及荷载传递机制。此外，在全尺寸试验的基础上，建立了一个经过验证的数值模型，能够对钢筋截面配置、岩石形状、冲击能量和冲击点对路堤性能的影响进行参数化分析。研究结果表明，加筋土路堤具有优异的抗冲击性能，在冲击时表现出两种不同的变形模式，主要受冲击点、冲击能量和钢筋截面结构的影响。较小长径比的落石往往能达到更大的穿透深度，同时对路堤的干扰有限。当保持等长径比时，平坦的岩石几何形状产生更强的冲击力，对路堤结构造成更大的破坏。本研究的见解为验证和改进当前加固路堤的抗冲击设计提供了基础，为提高此类结构的安全性和功能性提供了重要意义。

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引用次数: 0

A settlement calculation method for soft ground subjected to air-boosting vacuum preloading 增压真空预压软土地基沉降计算方法

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-08-28 DOI: 10.1016/j.geotexmem.2025.08.005

Fang Xu , Wenqian Hao , Qichang Wu , Junfang Yang , Qi Yang

The air-boosting vacuum preloading (AVP) method effectively enhances the treatment performance of soft ground compared to conventional vacuum preloading. The air-boosting mechanism primarily exerts dewatering, de-structuring, and mitigating apparent clogging around drains, among which the dewatering is closely related to variations in pore water pressure within the soil. Through systematic analysis of pore water pressure variations during the preloading process, a computational framework for quantifying settlement increments induced by dewatering effect is established. By integrating the proportional contribution of dewatering to the total air-boosting effects, the settlement amplification mechanism attributable to air-boosting was characterized. These findings, in conjunction with vacuum consolidation theory, culminated in the development of a settlement calculation method for AVP-treated soft ground. The proposed method was validated through its application to two case histories, demonstrating favorable computational efficiency and satisfactory alignments between predicted and measured settlements. It also effectively reflects the evolution of ground settlement under air-boosting. Furthermore, the variations of the soil e-lg(p) compression curve under AVP treatment were investigated, facilitating the identification of an approximate shifted e-lg(p) curve. Finally, the primary factors affecting the settlement of AVP-treated soft ground were clarified. These findings offer valuable insights for the analysis and design of AVP-treated soft ground.

与传统的真空预压相比，增压真空预压法有效地提高了软土地基的处理性能。空气增压机制主要发挥排水、去结构和缓解排水周围明显堵塞的作用，其中排水与土壤孔隙水压力的变化密切相关。通过系统分析预压过程中孔隙水压力的变化，建立了量化脱水沉降增量的计算框架。通过综合降水对总增压效应的比例贡献，表征了增压沉降放大机理。这些发现，结合真空固结理论，最终发展了avp处理软土地基的沉降计算方法。通过对两个历史案例的应用验证了所提出的方法，证明了良好的计算效率和预测与实测沉降之间令人满意的一致性。它也有效地反映了空气助推作用下地面沉降的演变过程。此外，研究了AVP处理下土壤e-lg(p)压缩曲线的变化，有助于识别近似移位的e-lg(p)曲线。最后，明确了影响avp处理软土地基沉降的主要因素。这些发现为avp处理软土地基的分析和设计提供了有价值的见解。

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引用次数: 0

Influence of initial water content and voltage gradient on electroosmotic dewatering of ultra-fine soils using novel electrokinetic geosynthetics 初始含水量和电压梯度对新型电动土工合成材料超细土电渗透脱水的影响

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-08-26 DOI: 10.1016/j.geotexmem.2025.08.006

Nilan Jayasiri , Andy Fourie , Cristina Vulpe

Electroosmotic (EO) dewatering has gained substantial attention as an alternative method for improving weak soil deposits. One aspect that has not received sufficient attention in this approach is the influence of initial water content and voltage gradient on the EO treatment. This study aimed to provide a comprehensive understanding of the key operational parameters and post-dewatering performance metrics of EO treatment with varying initial water contents and voltage gradients. A number of electrical, hydraulic and soil water retention parameters were monitored during the treatment process, and the material response to the EO treatment was evaluated by assessing various geotechnical and physiochemical parameters. The results indicate that, regardless of the voltage gradients, overall, the EO dewatering led to a reduction of at least one-third of the original water content. The EO treatment resulted in a sevenfold, ninefold and twentyfold relative increase in undrained shear strength for the experiments with the lowest, intermediate and highest initial water contents, respectively, indicating an exponential increase as the initial water content of the slurry increases. The implications of the findings to improve the viability of EO treatment for large-scale applications using electrokinetic geosynthetics are also discussed.

电渗透（EO）脱水作为一种改善软弱土壤沉积物的替代方法受到了广泛的关注。在这种方法中没有得到足够重视的一个方面是初始含水量和电压梯度对EO处理的影响。本研究旨在全面了解不同初始含水量和电压梯度下EO处理的关键操作参数和脱水后性能指标。在处理过程中监测了许多电气、水力和土壤保水参数，并通过评估各种岩土和物理化学参数来评估材料对EO处理的响应。结果表明，无论电压梯度如何，总体而言，EO脱水导致原始含水量至少减少三分之一。在初始含水量最低、中等和最高的试验中，EO处理导致不排水抗剪强度分别相对提高了7倍、9倍和20倍，表明随着浆体初始含水量的增加，不排水抗剪强度呈指数增长。本文还讨论了这些发现对提高电动土工合成材料大规模应用的EO处理可行性的意义。

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引用次数: 0

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 : 2025-08-26 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

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 : 2025-08-25 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

Chemical-enhanced electrokinetic geosynthetics (EKG) electro-osmosis combined with vacuum preloading for consolidation and copper remediation in contaminated dredged sludge 化学增强电动土工合成（EKG）电渗透结合真空预压在污染疏浚污泥中的固结和铜修复

IF 6.2 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes

Pub Date : 2025-08-25 DOI: 10.1016/j.geotexmem.2025.08.008

Yang Shen , Nihao Wei , Kewei Fan , Wencheng Qi , Jianting Feng , Zhiqiang Lai

Chemical-enhanced electrokinetic geosynthetics (EKG) electro-osmosis combined with vacuum preloading was employed to simultaneously consolidate and remediate copper-contaminated dredged sludge. Five chemical additives—citric acid, tartaric acid, hydrogen peroxide, rhamnolipids, and sodium chloride—were systematically evaluated via model tests. Results show that all additives improve both drainage and copper removal, with sodium chloride exhibited the enhancement in dewatering performance, while rhamnolipid achieved the highest copper removal efficiencies. Mechanistic analysis revealed that chemical additives improved sludge dewatering by enhancing pore water migration—through modifying soil structure, increasing ionic conductivity, or reducing surface tension. They also promoted copper removal by altering speciation: acidic chelating agents reduced pH and stabilized Cu²⁺ in soluble complexes, suppressing precipitation, while in near-neutral conditions, cathodic OH⁻ dissolved Cu(OH)₂ into mobile species, facilitating transport. Energy analysis confirmed that chemical-enhanced systems improved the energy efficiency of copper removal. These findings support the integrated use of EKG electro-osmosis combined with vacuum preloading, coupled with appropriate chemical agents, as a viable and energy-efficient strategy for the remediation of heavy metal-contaminated dredged sludge.

采用化学增强电动土工合成材料（EKG）电渗透与真空预压相结合的方法，对铜污染的疏浚污泥进行了同步固结和修复。五种化学添加剂——柠檬酸、酒石酸、过氧化氢、鼠李糖脂和氯化钠——通过模型试验进行了系统的评价。结果表明，各添加剂均能提高脱铜效果，其中氯化钠对脱铜效果有增强作用，鼠李糖脂的脱铜效果最好。机理分析表明，化学添加剂通过改变土壤结构、增加离子电导率或降低表面张力来增强孔隙水迁移，从而改善污泥脱水。它们还通过改变形态来促进铜的去除：酸性螯合剂降低pH值，稳定可溶性配合物中的Cu2+，抑制沉淀，而在接近中性的条件下，阴极OH−将Cu(OH)2溶解成可移动的形态，促进运输。能量分析证实，化学增强系统提高了除铜的能源效率。这些发现支持将心电图电渗透与真空预压相结合，再加上适当的化学剂，作为一种可行且节能的策略来修复重金属污染的疏浚污泥。

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引用次数: 0