Experimental Study on Shear Strength Parameters of Natural Sulfate Saline Soil

摘要：

　　The factors affecting the shear strength of sulfated saline soil are complex,and the variation law is difficult to explore.In order to determine the variation of shear strength of sulfate-based roadbed saline soil under different water content,compaction and confining pressure,the internal friction angle and cohesion,which are two important parameters of shear strength,were analyzed.The test results show that the stress-strain curve of sulfate-based saline soil is strain-softening type distribution,and the smaller the confining pressure,the more obvious the softening type; the shear strength increases with the increase in confining pressure and compaction.The cohesive force first increases and then decreases with the increase in water content,and the maximum cohesive force occurs near the optimal water content; the cohesive force increases slowly with the increase in compaction degree; the cohesive force increases most obviously when the water content is 10.8%.The internal friction angle decreases with the increase in water content,and the peak area is not obvious; the internal friction angle increases as the degree of compaction increases.

关键词： Saline soil mechanics Stress strain Cohesion Internal friction angle

作者: Fu-tang ZHAO Xiong-yu TANG Zhong-shi-yu WANG Rui-sen GAO Li-jun CHANG

作者单位: School of Civil Engineering,Qinghai University,Xining 810016,China

会议类型: 国际会议

会议名称: 2019 International Conference on Informatics, Control and Robotics 2019信息学、控制和机器人学国际会议(ICICR2019)

会议地点: 上海

会议语种:英文

页码: 403-406

在线出版日期: 2019-06-16（万方平台首次上网日期，不代表论文的发表时间）