利用既有车站作为重力式挡墙的换乘车站深基坑支护设计方案  

Design scheme of deep foundation pit support of transfer metro station taking advantage of existing station as gravity retaining wall

作　　者：姚燕明[1] 赵豫鄂 

机构地区：[1]宁波市轨道交通工程建设指挥部,浙江宁波315100 [2]浙江华展工程研究设计院,浙江宁波315000

出　　处：《铁道建筑》2015年第9期86-89,共4页Railway Engineering

基　　金：宁波市社会发展领域科技攻关项目(2014C50036)

摘　　要：宁波轨道交通1号线T形换乘大卿桥车站同步施工了换乘节点,1号线已建车站为地下二层,后建4号线换乘车站为地下三层,后建车站深基坑施工需对既有的车站进行保护。采用三维有限元分析比选了不同基坑支护设计方案对既有车站变形和内力的影响,从而确定合理的支护方案,并将计算结果与监测数据进行了对比分析。结果表明:已建车站整体纵向刚度大,能够有效减少基坑开挖引起的变形,在基坑开挖过程中可以对既有车站结构不设置斜支撑。利用既有车站结构作为重力式挡墙有利于减少施工工序,缩短施工周期。The transfer node of the“T” shaped Daqing Bridge transfer metro station in Ningbo rail transit line 1 was constructed synchronously, the underground two storey building of the line 1 station was built, the later transfer metro station of line 4 is a underground three storey building,and the deep foundation pit construction of later metro station needs the protection of existing stations.The inf luence of the different foundation pit support design scheme on the deformation and internal force of existing station was analyzed by using three-dimension f inite element,the reasonable support plan was determined, and the calculation results and the monitoring data were compared.The results showed the deformation of the station caused by foundation pit excavation could be reduced eff iciently due to the big whole longitudinal stiffness of the existing station,the inclined brace of the foundation pit don＇t need to be set for the existing station structure during foundation pit excavation,which means using existing railway station struc-ture as a gravity retaining wall could reduce the construction process and shorten the construction cycle effectively.

关 键 词：基坑 换乘车站 重力式挡墙 

分 类 号：TU941[建筑科学—建筑技术科学] U231.4[交通运输工程—道路与铁道工程]