新疆西郊水库大坝防渗心墙土料分散性鉴定

针对当前通用的土料分散性鉴定的5种试验方法。即双比重计法、碎块试验、针孔试验、孔隙水可溶盐试验和交换性阳离子试验的结果往往会出现不相吻合的情况，通过对新疆西郊水库大坝防渗心墙土料分散性的研究。从分散性机理和判断标准来分析不相吻合的原因。并认为应当深入研究盐渍土的分散性鉴定试验的定量化判断标准。促进分散性土鉴定试验规程的制定与实施。

Judgment on dispersive clay of the cutoff wall for Xijao dam in Xinjiang

As to five normal test methods(double-hydrometer test,crumb test,pinhole test,test for anion of soluble salts of pore water and test for percentage of exchangeable sodium) are not always in conformity.Through a study of the dispersive clay of the cutoff wall,the reasons for the unconformity are analyzed on the basis of dispersive mechanism and judgment standard.And,the quantitative standard of judgment shall be especially studied for saline soil in order to draft and implement the Specification of dispersive clay test.