Effect of particle swelling on hydraulic performance and meso-mechanism of geosynthetic clay liners

HOU Juan; ZHANG Jin-bang; SUN Yin-yu; SUN Rui; LIU Fei-yu

doi:10.16285/j.rsm.2023.0712

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Effect of particle swelling on hydraulic performance and meso-mechanism of geosynthetic clay liners

更新时间：2026-06-25

- Effect of particle swelling on hydraulic performance and meso-mechanism of geosynthetic clay liners
- Vol. 44, Issue 10, Pages: 3039-3048(2023)
- 作者机构：
  
  1. 上海大学力学与工程科学学院,上海,201900
  2. 青海大学土木工程学院,青海,西宁,810016
  3. 弗吉尼亚大学工程学院，弗吉尼亚州夏洛茨维尔,美国,22904
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2023.0712
  CLC： TU43
- Online First：16 October 2023，
  
  Published：2023
- 稿件说明：
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HOU Juan, ZHANG Jin-bang, SUN Yin-yu, et al. Effect of particle swelling on hydraulic performance and meso-mechanism of geosynthetic clay liners[J]. 2023, 44(10): 3039-3048.
DOI：

HOU Juan, ZHANG Jin-bang, SUN Yin-yu, et al. Effect of particle swelling on hydraulic performance and meso-mechanism of geosynthetic clay liners[J]. 2023, 44(10): 3039-3048. DOI： 10.16285/j.rsm.2023.0712.

摘要

膨润土复合衬垫(geosynthetic clay liners

GCL)的防渗性能与膨润土颗粒水化后的多孔介质特性密切相关。通过建立去离子水环境下颗粒尺度GCL渗流的COMSOL数值计算模型，量化研究了颗粒膨胀对GCL有效孔隙率、迂曲度以及渗透系数的影响。研究结果表明，介观尺度膨润土颗粒的膨胀是影响GCL整体有效孔隙率、迂曲度及最终渗透系数的关键因素。膨润土颗粒膨胀会明显影响流径数量及流径通道宽度。当GCL的渗透系数接近10

-11

m/s量级时，存在一条明显的主流径，初始孔隙率从0.5上升至0.6时，颗粒膨胀后的有效孔隙率从0.07上升至0.11，最小流径通道的宽度约为0.001 mm，大约为水分子的2 500倍。随着膨润土颗粒的膨胀，GCL内主流径迂曲度逐渐增加。当初始细颗粒直径为0.1 mm，初始孔隙率从0.5增加至0.6时，GCL内主流径迂曲度在1.2～1.4之间，但所有初始孔隙率下的主流径迂曲度变化范围在0.07左右。同时，渗透系数接近10

-11

m/s量级时，膨润土颗粒膨胀对GCL渗透系数的影响非常显著，当孔隙膨胀率大于0.96后，孔隙膨胀率增加了0.01

GCL的渗透系数会迅速下降一个数量级。

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