软土深基坑开挖对邻近地铁结构的影响规律分析  

Analysis of Influence Rule of Excavation of Deep Foundation Pit in Soft Soil on Adjacent Subway Struicture

作　　者：褚峰 CHU Feng(Shanghai Lujiazui Finance&Trade Zone Development Co.,Ltd.,Shanghai 200126,China)

机构地区：[1]上海陆家嘴金融贸易区开发股份有限公司,上海200126

出　　处：《建筑施工》2020年第5期848-850,853,共4页Building Construction

摘　　要：深基坑工程施工可能会导致紧邻地铁结构发生过大变形而破坏。以上海软土地区某深基坑工程为对象,通过分析各施工阶段地铁道床和侧墙竖向位移的实时监测数据,研究各因素对地铁结构变形的影响。实测结果表明:主基坑开挖会导致地铁结构发生沉降,而次要的小基坑开挖则会导致地铁上浮;地铁道床和侧墙的竖向位移主要发生在大型基坑首层土体开挖阶段;地铁与基坑的水平距离和地铁线周围地基加固效果是影响地铁道床不均匀沉降的主要因素,而刚度更高的侧墙则不易发生不均匀沉降。To avoid the damage of the adjacent subway structure due to excessive deformation caused by the deep foundation pit constr lction,taking a deep foundation pit project in Shanghai soft soil area as the object,and by analyzing the real-time monitoring data of the vertical displacement of the subway track bed and side wall in each construction stage,the influence of various factors on the deformation of the subway structure has been studied.The results show that the main foundation pit excavation will lead to the settlement of subway structure,while the minor foundation pit excavation will lead to the floating of subway.The vertical displacement of the subway track bed and side wall mainly occurs in the excavation stage at the first layer of the large foundation pit.The horizontal distance between the subway and the foundation pit and the reinforcement effect of the foundation around the metro line are the main factors that affect the uneven settlement of the subway bed,while the side wall with higher rigidity is not easy to have the uneven settlement.

关 键 词：深基坑工程 地铁结构 变形监测 垂直位移 

分 类 号：TU433[建筑科学—岩土工程]