变水头渗透试验鉴定分散性粘土方法探讨

Discussion on dispersive clay identification methods by variable head permeability test

针对分散性粘土与非分散性粘土从颗粒级配上难与分辩,需特定设备和试验方法测定问题,探讨了采用常规变水头渗透试验鉴定分散性粘土的方法,结果表明:采用延长试验时间,从出水口流水的变化、试验过程数据分析、试验结束后观察试样内部结构即可初步判定粘土是否具有分散性。

It is difficult to identify dispersive clay from non-dispersive clay by the grain graduations, so special de-vices and testing methods are required. The author probed into the conventional variable head permeability testingmethod for dispersive clay identification, and concluded that we can preliminarily judge whether the tested clay isdispersive by extending the test time, observing the outlet flow change, analyzing the test data, and checking thesample internal structure after the test is finished.