摘要
为进一步研究临地铁基坑开挖过程中围护结构变形反演模拟的准确性,以深圳市前海某项目基坑支护工程为对象,对基坑开挖过程中桩顶位移、沉降、深层水平位移和支撑轴力进行分析,研究桩顶位移、沉降与时间的关系、深层水平位移、支撑轴力等变化规律,结果表明:桩顶水平位移的增加呈“先慢后快再慢”的趋势;基坑工程时间越长,施工机械对围护桩的扰动越大,桩顶竖向沉降越大;深层水平位移随开挖深度呈现“两头小,中间大”的趋势,最大深层水平位移随施工进度而增加;内支撑结构能有效控制基坑变形,承担主动土压力。研究结果对类似基坑工程具有一定的指导意义。
In order to further study the accuracy of the inversion simulation of the deformation of the retaining structure in excavation engineering near the subway,take the project in Qianhai of Shenzhen as the object,it analyzed the pile top displacement and settlement,soil horizontal displacement,and support axial force during the excavation process of the excavation engineering,and studies the relationship between pile top displacement and time,as well as the changes in deep horizontal displacement and support axial force.The results show that the increase in horizontal displacement at the top of the pile shows a trend of"slow first,fast then slow";The longer the excavation time,the greater the disturbance to the soil caused by construction,and the greater the vertical displacement of the pile top;The deep horizontal displacement shows a trend of"small at both ends and large in the middle"with the excavation depth,and the maximum horizontal displacement in the deep layer increases with the construction progress;Internal support can effectively control the deformation of the foundation pit and bear active earth pressure.The research results have certain guiding significance for similar foundation pit projects.
作者
代仲海
吴磊
DAI Zhonghai;WU Lei(Shenzhen Geology Construction Company Shenzhen 510078,China;Shenzhen Geological Bureau Shenzhen 510078,China)
出处
《广东土木与建筑》
2024年第1期9-11,32,共4页
Guangdong Architecture Civil Engineering
基金
广东省深圳市地质局院士工作站专项经费资助项目(2013B090400025)。
关键词
基坑工程
监测
变形
沉降
excavation engineering
monitor
deformation
settlement
