液体对土工织物膨润土垫膨胀性和渗透性的影响

›› 2006, Vol. 27 ›› Issue (S1): 581-585.

液体对土工织物膨润土垫膨胀性和渗透性的影响

李志斌，徐超

同济大学岩土工程重点实验室/教育部城市环境与可持续发展联合研究中心，上海 200092

收稿日期:2006-05-10 发布日期:2006-12-15
作者简介:李志斌，男，1980年生，博士，主要从事环境岩土工程方面的研究。

Influence of liquids on swelling characteristics and hydraulic properties of heosynthetic clay liners

LI Zhi-bin, XU Chao

Key laboratory of Geotechnical Engineering, United Research Center for Urban Environment and Sustainable Development, the Ministry of Education, Tongji University; Shanghai 200092, China

Received:2006-05-10 Published:2006-12-15

摘要/Abstract

摘要： 近年来土工织物膨润土垫（GCL）被越来越多地应用到各种防渗工程中，它的膨胀性和渗透性也成为了设计人员和研究人员所关注的焦点。通过水化膨胀试验、自由膨胀试验和渗透试验，研究了液体对GCL膨胀性能和渗透性能的影响以及膨胀性和渗透性之间存在的相关关系。试验结果表明, 水化液和渗透液的种类对GCL的膨胀性和渗透性有很大影响，其影响分别为：(1) 水化液相同时，渗透液的种类对GCL的渗透系数有影响，而渗透液相同时，水化液的种类对GCL的渗透系数也有影响；(2) GCL的水化膨胀量和渗透系数之间存在相关关系，水化膨胀量越大，渗透系数就越低；(3) GCL中膨润土的自由膨胀量和GCL的渗透系数之间也存在相关关系，自由膨胀量越大，GCL的渗透系数就越低。

关键词: 土工织物膨润土垫, 膨胀性, 渗透性, 液体, 影响

Abstract: Recently, geosynthetic clay liners (GCL) were more and more used in different anti-seepage engineering projects; and their swelling characteristics and hydraulic properties become a focus of designers and researchers. The influencing of liquids on swelling characteristics and hydraulic properties of GCL, as well as the relationship between swelling characteristics and hydraulic properties, were researched through hydration swell tests, free swell tests and hydraulic conductivity tests. It was found that hydration liquid and permeation liquid had influences on swelling characteristics and hydraulic properties of GCL. Test results have shown that: (1) the hydraulic conductivity of GCL was influenced by permeation liquids when hydration liquid was the same; and the hydraulic conductivity of GCL was also influenced by hydration liquids when permeation liquid was the same; (2) there was a relationship between hydration swells and hydraulic conductivities; the bigger the hydration swells, the lower the hydraulic conductivities; (3) there was also a relationship between free swells and hydraulic conductivities, the bigger the free swells, the lower the hydraulic conductivities.

Key words: geosynthetic clay liners (GCL), swelling characteristics, hydraulic properties, liquid, influence

中图分类号:

TU411.5

李志斌，徐超. 液体对土工织物膨润土垫膨胀性和渗透性的影响[J]. , 2006, 27(S1): 581-585.

LI Zhi-bin, XU Chao. Influence of liquids on swelling characteristics and hydraulic properties of heosynthetic clay liners [J]. , 2006, 27(S1): 581-585.

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