(浙江省建筑设计研究院，杭州 310006)
［摘要］首先采用软土本构模型——各向异性三屈服面流变模型，编制了基坑有限元程序，研究了基坑开挖过程中无周边留土和有周边留土情况下围护结构的水平位移、土体的位移(包括墙后土体的侧向位移、地表沉降和地表隆起)、支撑力随开挖过程的发展变化规律，探讨了基坑工程中的流变效应及其对围护结构位移和支撑力的影响。同时应用实例对新模型及有限元程序进行了验证，其计算值和实测值吻合。
［关键词］各向异性三屈服面流变模型；软土地基；流变效应；基坑开挖
Finite element analysis on rheology behavior of deep excavation in soft clay
Yuan Jing, Liu Xingwang, Shi Zuyuan, Yang Xuelin, Yi Deqing(Zhejiang Province Institute Architecture Design and Research,Hangzhou 310006, China)
Abstract:A finite element rheology program about deep excavation is presented to analyze the rheology behavior of soft clay. The model is an anisotropically trinal-yield surface rheology model. The deformation, plastic and damage zones and subsidence in the situations between holding peripheral soil and not holding peripheral soil are discussed during excavation. A field example is presented to check the finite element program. The calculating results accord with measure values well. This illustrates the program can describe the rheology behavior of soft clay during excavation.
Keywords:anisotropically trinal-yield surface rheology model; soft clay; rheology behavior; foundation pit; deep excavation
作者简介：袁静，博士，高级工程师，一级注册结构/土木(岩土)工程师，Email:Ojin9999@sina.com。
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