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对上海第②层粉质黏土重塑土进行了控制吸力、净围压的加卸载剪切试验。结果表明:该层土的非饱和强度特性符合Fredlund非饱和土强度理论;随着吸力的增加,土体的刚度和强度也随之增加,但较净围压对土体刚度、强度的影响要小很多;E50模量和Eur模量与吸力和围压具有较好的线性关系。同时,给出了该层土的强度参数、E50模量和Eur模量表达式及其参数取值。
Controlled suction and net confining pressure loading and unloading shear tests were carried out on the second layer of silty clay remodeled soil in Shanghai. The results show that the non-saturated strength characteristics of the soil meet the Fredlund unsaturated soil strength theory. With the increase of suction, the stiffness and strength of the soil also increase, but the impact of net confining pressure on the stiffness and strength of the soil Much smaller; E50 modulus and Eur modulus and suction and confining pressure has a good linear relationship. At the same time, given the soil strength parameters, E50 modulus and Eur modulus expression and its parameter values.