本文介绍了人工制备的正常固结粘土试样所进行的四种不同应力路径的试验成果。试验表明:在单一加荷条件下,正常固结粘土的塑性应变增量的方向与应力路径无关,可用统一的塑性流函数表示。同时,由于弹性系数为常数,弹塑性非藕合,以塑性体应变表达为硬化参数的屈服函数具有唯一性。经过验证,塑性势函数等于屈服函数,流动规律为相适应的流动法则。 This article describes the experimental results of four different stress paths performed on artificially consolidated, normally consolidated clay samples. Experiments show that under a single loading condition, the direction of the plastic strain increment of normally consolidated clay is independent of the stress path and can be expressed by a uniform plastic flow function. At the same time, since the elastic constant is constant and the elasticity and plasticity are not combined, the yield function expressed by the plastic body strain as the hardening parameter is unique. After verification, the plastic potential function is equal to the yield function, and the flow law is an adaptive flow rule.