某紧邻地铁深基坑支护设计及监测分析  

Support design of certain deep foundation pit near metro structure and its monitoring analysis

作　　者：王秀丽[1] 舒丽红[1] 何春保[2] 

机构地区：[1]西安铁路职业技术学院,陕西西安710600 [2]华南农业大学水利与土木工程学院,广东广州510642

出　　处：《铁道建筑》2016年第2期80-83,共4页Railway Engineering

摘　　要：某深基坑工程紧邻地铁车站一侧,由于受场地限制,必须利用既有车站连续墙作为支护结构的一部分,而其它侧根据相应地质条件采用旋挖桩加内支撑及预应力锚索的综合支护方案。为了准确分析基坑开挖对地铁车站和隧道结构的影响,按照基坑三维实体结构建立计算模型,进行三维有限元分析。同时,为了确保施工安全,在施工期间对基坑周边的沉降、水平位移和内支撑轴力等进行了监测。计算和实测结果表明:基坑支护变形和受力满足规范要求。基坑支护结构设计方案是可行的,可供类似工程参考。Constrained by space limitations, the deep foundation pit project closed to the metro station side made use of the existing station diaphragm wall as retaining structure, and rotating drill pile with interior support and pre- stressed anchor cable were used in the other sides according to geological conditions. The key of the foundation pit project was how to control the affect of foundation pit excavation on metro structure. In order to accurately analysis the influence of foundation excavation on metro station and tunnel structures, 3D finite element model was established based on the foundation pit 3D solid model. A monitoring system including the settlement of foundation pit,horizontal displacement, and axial force of interior supporting structure was proposed to ensure the construction safety. The results and measured data according to design scheme of foundation pit show that the support deformation and force meet the criterion request, and the supporting structure scheme is feasible. This design project can be a reference for similar engineering.

关 键 词：深基坑工程 基坑支护 设计计算 监测 

分 类 号：TU942[建筑科学—建筑技术科学]