某水库大坝防渗土料分散性研究

分散性土是一种抗冲蚀能力很低的土,作为大坝防渗土料容易引起大坝渗透变形破坏.因此评价土料的分散性是决定土料能否用于工程的重要因素,也是土坝稳定性评价的一项重要指标.针对某水库的大坝防渗土料,采用目前通用的分散性鉴定的4种试验方法,即双比重计法、针孔试验、碎块试验、孔隙水可溶盐阳离子试验法对土料的分散性进行室内试验,对这几种方法的试验结果进行分析,从而对土料的分散性进行综合判定.

Study on Dispersibility of Impervious Soils in Dam of a Reservoir

Dispersive clay has the very low erosion resistance capacity so as to cause the dam seepage deformation and dam failure as impervious soil material.So the identification of the dispersibility of soil samples is one of the important factors which decide if the soil can be used in engineering or not,and one of the important index to evaluate earth-rockfill dam stability.Now the double-hydrometer test,pinhole test,crumb test and pore water salts test are universal evaluation methods of the dispersibility of soil.This paper uses the four tests to analyze and identify the dispersibility of the soil samples which will be used as impervious soil material in a reservoir engineering,and explores the tests method and results.