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

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。

Abstract: 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 ...