本文在对冻土墙围护深基坑开挖冻结温度场和应力场耦合分析研究现状的基础上，以热力学为基础，推导了冻土墙温度场控制微分方程，并利用伽辽金方法推导了冻土墙冻结温度场和应力场耦合计算的有限元计算格式。当冻土墙中温度发生变化时产生变温应力，把变温应力作为一种等效荷载在本构方程中加以考虑，得到温度场和应力场耦合的有限元方程。以岩土力学与工程专用程序NCAP-2D为平台，扩充和发展了冻土墙温度场和应力场两场耦合数值分析软件。并对一冻土墙围护深基坑算例进行了计算机模拟，分析了冻土墙温度场、热膨胀系数、基坑跨度、冻土墙插入深度等各种因素对基坑开挖性状的影响，为冻土墙围护深基坑开挖工程的设计与施工提供较为科学的依据。

In this paper, the present status of development on the deep foundation pit conserved by frozen wall and coupled problems are analyzed thoroughly. The governing differential equations are obtained based on thermodynamics, while the finite element formulae is achieved by the Galerkin’s method. The changed temperature will lead to stress. The stress is considered in constitutive equations, and the coupled equations of temperature and stress fields are obtained. On the basis of NCAP-2D program used for geotechnical mechanics and engineering, the numerical analysis software of the coupled problem of temperature and stress fields in frozen wall is developed. Finally, an example is done by means of this program. Many influencing factors, such as temperature of frozen wall, heat expansion coefficient, span of pit, inserting depth, are analyzed.