中文摘要：

基于广义塑性力学，分析了理想塑性冻土屈服面的一些具体特性，对冻土的体积屈服面进行了比较详尽的探讨。通过对已有屈服函数Matsuoka—Nakai屈服准则的修改，提出了一个冻土屈服函数，并对此函数进行了具体研究．通过和试验数据的对比，验证了所提出屈服函数的正确性，所提出的函数含有三个参数，随着温度的不同对冻土屈服面的形状和大小都有重要的影响。

英文摘要：

The present paper analyzed some basic characters of the yield surface of saturated frozen soil. Based on the generalized plastic mechanics, volume yield surface of frozen soil were discussed systematically. A closed yield surface of frozen soil was proposed by modifying Matsuoka-Nakai criterion. We acquired a satisfying result by comparison with Mohr-Coulomb criterion and validated its validity by contrasting test data with the proposed yield function. Moreover, three parameters k,ms and Pe associated with the proposed yield function are studied since they have significant influence on the size and shape of yield surface.