摘要
在深基坑支护结构的科学研究和实际工程设计计算中,有限元数值分析方法得到了越来越广泛的运用。目前一般通过设置接触面单元来模拟支护结构与土之间的相互作用。但在实际应用过程中,接触面参数的取值问题给模拟计算结果带来了许多不确定性,目前其取值仍是一个比较棘手的问题。利用Goodman接触面单元模拟了双排桩支护结构与周围土体之间的相互作用,通过改变Goodman接触面单元的初始法向刚度及初始切向刚度,分析了其变化对双排桩支护结构水平位移、桩顶竖直位移及周围土体沉降及坑底隆起量的影响,对双排桩支护基坑数值分析时接触面初始刚度系数的选取具有重要意义。
The finite element numerical analysis method has been widely applied in research and design on deep foundation pit.At present the interaction between supporting structure and soil foundation is generally simulated by interface element.The contact element is used to simulate the interaction between support structure and soil foundation.But during the practical application,it＇s a critical issue about how to confirm the value of interaction parameter,because different value of interaction parameter can lead to uncertainty about calculation result.The Goodman element is used in this paper to simulate the interaction between support structure and soil foundation.The influence of initial contact stiffness on horizontal and vertical displacement of double-row piles,vertical settlement of ground surface and uplift in bottom of foundation pit is analyzed with finite element method.This provides a basis for the choice of contact stiffness coefficients on numerical calculation of double-row piles structure.
出处
《地下空间与工程学报》
CSCD
北大核心
2012年第2期301-306,共6页
Chinese Journal of Underground Space and Engineering
