干密度对海相及河相软土邓肯-张模型参数的影响

摘要

In order to study the engineering characteristics of marine and river soft soil, triaxial drained shear tests were done under different dry density, and test results were analyzed by using Duncan-Chang model, from which the law of Duncan-Chang model parameters changes with dry density were drawn. The results show that, with the increase of dry density, cohesion and internal friction angle of soft soil are increasing,the tangent elastic modulus and bulk modulus increase too.%通过三轴排水剪试验研究了海相及河相软土的工程特性,并将试验结果用邓肯-张模型进行整理分析,获得了海相及河相软土的邓肯-张模型参数随干密度的变化规律.试验结果表明,随着干密度增大,海相及河相软土的粘聚力和内部摩擦角都有增大的趋势,切线弹性模量和切线体积模量均随着干密度的增加而增大.