Research on Anti-seepage Properties of GCL in Environmental Geotechnical Engineering Problems
To build landfills is a principal means for the cities of our country to dispose garbage. Theimpervlous barrier of cover system and lines system is the key to ensure that the landfills should not bethe source of secondary pollution to the surrounding. In recent years．geosynthetic Clay liners(GCLs)are widely used in difierent kinds of anti-seepage projects and the anti-seepage availabilities of GCLsare regarded as increasingly important by engineers．Anti-seepage effectiveness of GCLs involves atleast two aspects,such as Hydraulic conductivity of GCLs under engineering practice conditions．andAbsorption ability of bentonite in GCLs in the course of liquid permeation. In this pape,Hydraulicconductivity tests are performed to obtain seepage coefficient of GCLs,taking liquids such as distilled,deioned water and landfill leachate．and solutions with single-species cation as the hydration andpermeation liquid. The results Show that cation valence．cation concentration and hydration ionic radiusin hydration and permeation liquids have influences on hydraulic conductivity of GCLs．Absorptionability of GCLs in the course of liquid permeation is studied．and its influencing factors are alsodiscussed,including hydration liquid and permeation time. The results Show that GCLs has largeabsorption ability on the permeation liquids．But the ability is decreasing with increase of permeationvolume．And the types of hydration liquids exercise great influence on the variation of GCLsabsorption．Analyses are made to combine the conclusion obtailled in this Study with practicalengmeenng projects,and proposals of building method of GCLs are advanced．and make suggestion onthe future development of this technology．
landfills GCLs lines system impervious barrier ezperimental analysis
XIONG Xiaobo GUI Guoqing MA Shuzhi
School of Engineering, Jinggangshan University, jian, P.R.China, 343009 School of Engineering, China University of Geosciences, Wuhan, P.R.China, 430074
国际会议
2009 International Forum on Porous Flow and Applications(第十届全国渗流力学学术会议)
武汉
英文
353-361
2009-04-26（万方平台首次上网日期，不代表论文的发表时间）