宽级配砾石土作为GCLs/GM防渗垫保护层的可行性研究  

A study of the feasibility of gravel soils material as a protector of the GCLs/GM barrier

作　　者：王红雨[1,2] 张学科[1] 杨燕伟[1] 

机构地区：[1]宁夏大学,银川750021 [2]宁夏节水灌溉与水资源调控工程技术研究中心,银川750021

出　　处：《水文地质工程地质》2010年第5期102-107,共6页Hydrogeology & Engineering Geology

基　　金：教育部科学技术研究重点项目(207126);宁夏自然科学基金项目(NZ0942)联合资助

摘　　要：鉴于西北地区干-湿与冻-融交替循环的气候特征、砾质土料储存量丰富以及土工织物膨润土垫(GCLs)防渗新技术在国内外已逐步得到推广应用,提出了宽级配砾质土料、土工织物粘土垫层(GCLs)和土工膜(GM)组合作为垃圾填埋场防渗系统的构想。通过对宽级配砾质土料的室内试验数据和国内外有关文献资料的分析研究表明,以GCLs/GM作为隔渗层,以宽级配砾质土代替粘土作为隔渗层的保护层所构成的复合防渗系统,能有效抵御干-湿与冻-融交替循环作用的影响,显著提高垃圾填埋场长期防渗能力和整体稳定性。对于处在西北地区特殊环境中的垃圾填埋场而言,文中所建议的复合防渗系统设置方法,可能是一种值得期待的垃圾填埋场防渗型式。The design conception of composite lines consisting of a geomembrane（GM）,geosynthetic clay liners（GCLs） and compacted gravel soils in landfills was presented based on the climate characteristics,gravel soils material rich in nature,and GCLs have been exported all over the world for various applications.The analysis results from the test data of gravel soils material suggest that the power to resist the collapse of wetting-drying and freezing-thawing,long-term barrier performance,and the general sliding stability of the barrier system were enhanced obviously by using GCLs /GM as a barrier and displacing clay by gravel soils as a protector in this paper.It will be plausible as an effective design for the barrier system of landfill under wet-dry and freeze-thaw alternation cycles in northwest China.

关 键 词：砾质土料 GCLs/GM防渗垫 冻-融循环 干-湿循环 垃圾填埋场 

分 类 号：U214.92[交通运输工程—道路与铁道工程] X705[环境科学与工程—环境工程]