太原地铁深基坑温度效应有限元分析  

Finite Element Analysis of Thermal Effect for Taiyuan Subway

作　　者：杨欢欢 杨双锁[1] 鲍飞翔 

机构地区：[1]太原理工大学矿业工程学院,山西太原030024

出　　处：《施工技术》2018年第5期118-121,共4页Construction Technology

基　　金：国家自然科学基金资助项目(51274145)

摘　　要：依托太原地铁中心街西站基坑工程,采用MIDAS/GTS有限元分析软件,研究温度变化对地铁深基坑地下连续墙水平位移及支撑轴力的影响规律,在此基础上通过正交试验法进一步分析了地下连续墙插入比、支撑水平间距、地下连续墙厚及预应力4因素对支撑轴力温变率的变化规律及影响程度。结果表明:升降温地下连续墙水平位移变形趋势基本相似,温度改变对墙顶水平位移影响最大,墙身位移则随深度的增加逐步减小;支撑轴力随温度改变呈线性变化,第3道支撑的温度敏感性大于前两道,受温度的影响最大;支撑水平间距对轴力温变率的影响最显著,其次是地下连续墙厚。Based on the foundation excavation engineering of Taiyuan Subway Center Street West Station,using finite element analysis software MIDAS/GTS,this paper studied the changes and influence of temperature on horizontal displacement and axial force of deep foundation excavation diaphragm wall of the subway,and the analysis of the diaphragm wall support insertion ratio,horizontal spacing,wall thickness and prestress as four factors to support axial force temperature change rate influence degree by orthogonal test method. The results show that the horizontal deformation law of the diaphragm wall is similar,the temperature change has the greatest influence on the horizontal displacement of the top of the diaphragm wall,and the diaphragm wall body decreases gradually with the increase of the depth; the axial force of support varies linearly with temperature,and the temperature sensitivity of the third support is greater than that of the first two; the effect of support horizontal distance on the temperature variation of axial force is the most significant,followed by the diaphragm wall thickness.

关 键 词：地铁 深基坑 地下连续墙 有限元分析 温度效应 支护结构 正交试验 

分 类 号：U231.4[交通运输工程—道路与铁道工程]