临近地铁基坑施工监测分析  

Monitoring and Analysis of Foundation Pit Excavation Adjacent to Metro

作　　者：张旭[1] 李家平[1] 王如路[1] 

机构地区：[1]上海地铁运营有限公司,上海200003

出　　处：《施工技术》2008年第S1期150-153,共4页Construction Technology

摘　　要：结合上海人民广场换乘大厅基坑工程监测数据,对基坑开挖引起的围护结构水平位移、坑底隆起的规律进行了分析。监测结果表明:开挖卸载引起围护结构向坑内位移,位移量随开挖深度的增加而增大,最大水平位移以及最大变形速率发生的位置相应逐渐下移,该位置一般在开挖面以下2m左右;一个月左右的停工足以引起围护结构水平位移出现大幅度增加;坑底隆起量随开挖深度的增加而增大,开挖停止后隆起速率很快减小,隆起量趋于稳定。Retaining structure horizontal displacement and uplift law of foundation bottom are analyzed according to monitored data of foundation pit engineering in Shanghai People Square.It shows that displacement caused by excavation increases with excavation depth,and the maximum displacement and deformation rate turn downward accordingly,which keep at 2m down to excavation surface.Displacement increaseds remarkably when construction stops for about one month.The uplift increases with exaction depth,and the uplift speed reduced quickly when excavation stops,then,it turns stable.

关 键 词：基坑工程 开挖监测 水平位移 坑底隆起 

分 类 号：TU753[建筑科学—建筑技术科学]