不同试验条件下盐渍土溶陷特性的对比分析

Comparative Analysis of Collapsibility Characteristics of Saline Soil under Different Experimental Conditions

以氯盐渍土公路路基填料作为研究对象,通过单、双线法单轴压缩试验的试验结果的对比分析,总结出单、双线法试验结果存在一定差异,但是这种差异性并不影响两种试验结果的规律性。研究表明:不论采用何种试验方法,均能得到溶陷系数、峰值溶陷压力随含水量增大而减小的规律,且氯盐渍土峰值溶陷压力稳定在一定范围内;综合考虑试验方法与实际工程情况以及实验结果的准确性,双线法比单线法更适合于对盐渍土溶陷性的试验研究。

The subject of this article is the chlorine saline soil which is as subgrade material. Based on comparative analysis of the result of the test carried out by single-tract method and hilinear method, some differ- ences in the results of two methods are found out. But these differences do not affect the regularity of the two test results. The research shows that regardless of which method is used, the law that subsidence coefficient and peak of pressure will decrease with the water content can be gotten, and peak of subsidence pressure of chlorine saline soil can be stabilized in relative range. After considering test method works as well as the accuracy of the experi- mental results, the bilinear method is more suitable than the single-track method in the study of saline soil＇s col- lapsibility characteristics.