华南理工大学学报(自然科学版) ›› 2005, Vol. 33 ›› Issue (11): 85-89.

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条形基础下地基稳定的突变性

吴艺 房营光   

  1. 华南理工大学 建筑学院,广东 广州 510640
  • 收稿日期:2005-01-20 出版日期:2005-11-25 发布日期:2005-11-25
  • 通信作者: 吴艺(1975-),男,博士生,主要从事地下结构研究 E-mail:W-em@163.com
  • 作者简介:吴艺(1975-),男,博士生,主要从事地下结构研究
  • 基金资助:

    广东省自然科学基金资助项目(010054)

Catastrophe of Base Stability Under Strip Foundation

Wu Yi  Fang Ying-guang   

  1. College of Architecture and Civil Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2005-01-20 Online:2005-11-25 Published:2005-11-25
  • Contact: 吴艺(1975-),男,博士生,主要从事地下结构研究 E-mail:W-em@163.com
  • About author:吴艺(1975-),男,博士生,主要从事地下结构研究
  • Supported by:

    广东省自然科学基金资助项目(010054)

摘要: 为正确描述与解释地基失稳中的突然破坏现象,采用尖点突变模型理论,对粘土地基上条形基础的稳定性进行了分析,讨论了粘土弱化函数、地基参数、地面超载以及位移二阶效应等对地基稳定性及其突变性质的影响,找出了发生突变破坏的条件.分析结果表明:突变理论可较好地解释地基突然失稳破坏的客观现象;地面超载、土的容重和位移二阶效应均为地基稳定的有利因素.

关键词: 条形基础, 地基, 稳定性, 极限承载力, 突变性

Abstract:

In order to correctly describe and explain the sudden failure of a base in stability losing,the stability of the strip foundation on clay base is analyzed by using the theory of cusp-catastrophe model.The efects of the wea-kening function of clay,the base parameters,the ground overload and the second-order effect of displacement,etc.on the base stability and its catastrophe are discussed,with the catastrophe and failure conditions being finally pro-posed.Analytical results show that the catastrophe theory fairly well explains the objective phenomenon of sudden stability losing and the failure of a base,and that the ground overload,the soil density and the second-order efect of displacement are advantageous of the base stability

Key words: strip foundation, base, stab ility, ultimate bearing capacity, catastrophe