本文系统地分析了我国深基坑开挖工程的发展现状，论述了冻土墙用于深基坑支护工程的原理及可行性，进一步探讨了冻土墙在地下工程中的应用前景。对冻土墙的冻结温度分布规律进行了深入的探讨，就冻土墙的蠕变特性及其影响因素进行了分析。研究了一系列适用于岩土工程的流变模型，给出了适合于冻土墙的力学模型，并采用最小二乘法对冻土流变参数进行了辨识。重点对冻土墙围护深基坑开挖进行了蠕变有限元数值分析，考虑冻土墙温度场为均匀温度场，将整个计算时间分为若干个小段，再通过分段求和法计算基坑变形。在粘弹塑性有限元程序NCAP-VEP基础上，扩充发展了冻土墙围护深基坑开挖的蠕变有限元计算程序。分别采用弹塑性力学模型和西原模型对冻土墙围护深基坑开挖性状进行了计算机模拟。讨论了冻土墙温度、暴露时间、边界荷载、冻土墙厚度等各种因素对冻土墙围护深基坑开挖变形性状的影响，并比较了两种不同模型下冻土墙及基底变形的差异性，为冻土墙围护深基坑工程的设计与施工提供了较为科学的理论依据。

In this paper, the present status of development on excavation engineering of deep foundation pit in the soft soil area of China is systematically analyzed. The principle and feasibility of using frozen soil wall to conserve the deep foundation pit is discussed. The application foreground on frozen soil wall in the underground engineering is thoroughly analyzed. There is a study of the location rule of temperature in frozen soil wall, and analyzes the creep characteristic and the influencing factors of frozen soil wall. A series of geotechnical engineering creep models are intensified by the least square method. The FEM numerical simulation on creep of excavation of deep foundation pit conserved by frozen soil wall is mainly analyzed, while the temperature of frozen soil wall is supposed to be uniformity. The whole time step is divided into some small steps, and the curve of deformation of deep foundation pit is obtained by summation by parts. The calculation program of excavation of deep foundation pit conserved by frozen soil wall is developed on the basis of NCAP-VEP program. The creep of excavation of deep foundation pit conserved by frozen soil is simulated by means of the elasticity-plasticity model and viscosity-elasticity-plasticity model. Computer tests are done and many influencing factors such as the temperature of frozen soil wall, exposure time, border load and the thickness of frozen soil wall are analyzed. The deformation caused by two models is compared. It is aimed to provided scientific theory for design and construction of frozen soil wall.