地铁车站软土基坑开挖过程中的时空效应分析  

ANALYSIS OF TIME-SPACE EFFECT DURING THE SOFT SOIL FOUNDATION PIT EXCAVATION IN A SUBWAY STATION PROJECT

作　　者：蒋洪胜[1,2] 刘国彬[1,2] 刘建航[1,2] 

机构地区：[1]同济大学地下建筑与工程系 [2]上海地铁总公司

出　　处：《建筑技术》1999年第2期80-82,共3页Architecture Technology

摘　　要：软粘土深基坑开挖过程中的时空效应是客观存在的。上海地铁二号线某车站基坑工程在降水不理想的情况下，按常规作法挖至坑底时挡墙最大水平位移为１０１．４６ｍｍ；而按时空效应法施工，挡墙的最大水平位移仅分别为６３．７８ｍｍ和５５．７ｍｍ。由工况跟踪记录和挡墙横向位移的整理分析，揭示了基坑开挖过程中的时空效应规律，为软土基坑施工提供了可行的经验。The time-space effect during the soft-clay soil foundation deep pit excavation is an objective reality.According to the conventional construction method for a station of Shanghai Subway No.2 project being carried out at an undesirable dewatering situation,it has been found out that at their foundation beds,the retaining wall' s maximum displacement is 101.46 mm. Nevertheless,according to the time-space effect method,the retaining wall's maximum horizontal displacements are 63.78 mm and 55.7 mm respectively.Keeping pace with the investigation data and survey records,and making a comprehensive study of the retaining wall's transverse displacement,it has revealed the law of time-space effect during foundation pit excavation and provided practical experiences in this situation.

关 键 词：软土基坑开挖 时空效应 挡墙位移 支撑 

分 类 号：TU753.1[建筑科学—建筑技术科学] U231.4[交通运输工程—道路与铁道工程]