罗布泊地区硫酸盐渍土溶陷性试验研究

摘要

Taking Lop Nur area’s sulphate (sulfurous) saline soil as the research object ,using the uniaxial compression double-line method ,and under different dry density and different initial water contents ,the collapsibility tests for the saline soil were carried out ,and its collapsibility mechanism was further analyzed .It is found from the tests that the col-lapsibility coefficient of Lop Nur sulphate (sulfurous) saline soil decreased along with the increase of water content and dry density ,and increased along with the increase of saltness .The sulphate saline soil’s peak value is 300 kPa ,the sul-furous saline soil’s peak value is 200 kPa ,and the peak collapsibility coefficient is generated at the peak pressure .%以罗布泊地区硫酸（亚硫酸）盐渍土为研究对象，采用单轴压缩双线法在不同初始含水率不同干密度的条件下，对盐渍土进行溶陷性试验并对其溶陷机理进行进一步分析。试验发现，该地区硫酸（亚硫酸）盐渍土的溶陷系数随干密度、含水率增加而减小；溶馅系数随含盐量增大而增大。硫酸盐渍土峰值压力为300 kPa ，亚硫酸盐渍土峰值压力为200 kPa ，并且在峰值压力处产生峰值溶陷系数。