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弹塑性有限元模拟分析影响基坑位移的因素
引用本文:姚爱国,Smith I M.弹塑性有限元模拟分析影响基坑位移的因素[J].煤田地质与勘探,2000,28(6):43-45.
作者姓名:姚爱国  Smith I M
作者单位:1. 中国地质大学工程学院,武汉,430074
2. 英国曼彻斯特大学土木工程系,Manchester M9 13PL,U K
基金项目:国家留学基金管理委员会资助
摘    要:分析影响基坑支扩破坏因素对于防止基坑事故的发生,优化基坑支护设计有重要意义。本文用弹塑性有限元方法模拟基坑破坏过程,分析了影响基坑支护破坏的因素。分析结果表明,土体和桩墙的弹性都基坑的位移有一定的影响,但土体弹性模量的影响比桩墙弹性模量的影响更大。根据这些结果,推论出传统基坑设计与弹性地基梁法的不足之处,另外,分析结果还表明,基坑坑顶水平位移与土体弹性模量的关系无固定规律,而坑底最大位移而弹性模量

关 键 词:弹塑性有限元  桩墙  土体  位移  基坑支护破坏因素
修稿时间:2000-03-07

ANALYZING THE FACTORS AFFECTING THE DISPLACEMENTS OF SUPPORTS FOR EXCAVATION BY THE SIMULATION OF FEM
Yao Aiguo,Smith I M.ANALYZING THE FACTORS AFFECTING THE DISPLACEMENTS OF SUPPORTS FOR EXCAVATION BY THE SIMULATION OF FEM[J].Coal Geology & Exploration,2000,28(6):43-45.
Authors:Yao Aiguo  Smith I M
Abstract:It is important to know the factors affecting the displacements of excavation as to prevent failure of the excavation and optimize the design of the supports.In this paper an elasto plastic finite element method is employed to simulate the procedure of the failure of the supports for excavation,by which the factors are analyzed.The results indicated that the elastic modulus of soil and the supports has an effect on the displacements of the supports for excavation,but the modulus of the soil more serious than that of the supports.Based on the results,the deficiency of designing the supports by the conventional method and by elastic beam column method is discussed.In addition,the simulation shows no direct relation between the modulus of soil and the horizontal displacement on the top of the support.And then the conclusion can be drawn that monitoring the displacement of the supports for excavation by observing the displacement on the top of the support structure is not reliable.
Keywords:elasto  plastic finite element  deep excavation  pile  modulus  
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