基坑开挖过程中围护体及周边环境变形分析

Analysis on Deformation of Retaining Structure and Surrounding Environment During Foundation Pit Excavation

国内外已对深基坑开挖过程造成的变形有一定研究。在此基础上,以上海静安区华兴新城项目为实例,对基坑施工过程中的基坑支护结构、周围环境进行动态监测,对围护体侧向位移变形情况、围护体垂直位移变形情况、开挖深度对地下连续墙侧向变形的影响、开挖深度对地下连续墙最大变形位置深度影响、基坑外环境变形情况、基坑外地表沉降等监测结果进行了分析和验证,并以分析数据为基础,得出施工优化方案,可为类似深基坑工程提供借鉴。

The deformation caused by the excavation of deep foundation pit has been studied worldwide.On this basis,taking the project of Huaxing New Town in Jing'an District of Shanghai as an example,the dynamic monitoring of the supporting retaining structure of the foundation pit and the surrounding environment during the construction of the foundation pit was carried out.The monitoring results of lateral displacement and vertical displacement of the retaining wall,the influence of excavation depth on the lateral deformation of the diaphragm wall,the influence of excavation depth on the depth of the maximum deformation position of the diaphragm wall,the deformation of the external environment of the foundation pit,and the surface settlement outside the foundation pit are analyzed and verified.Based on the analysis data,the construction optimization scheme is obtained,which can provide reference for similar deep foundation pit engineering.