北京地铁浅埋暗挖折返线工程结构设计与施工  

Design and Construction of Structure of Shallow Tunnel for Turn-back Track of Beijing Metro

作　　者：王海祥[1] 

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《铁道工程学报》2010年第4期91-96,共6页Journal of Railway Engineering Society

摘　　要：研究目的:针对北京地铁10号线劲松站至终点站折返线区间具有结构形式多样、工程水文地质条件差、地面建筑物及地下管线情况复杂和施工组织难度大的特点。通过对该工程施工过程中的重点和难点问题的分析,提出第四系地层中地铁折返线区间设计及施工关键问题的解决方法。研究结论:第四系地层中修建地铁时,设计应考虑化解断面差异、减少断面过渡、预加固中间土体,按照影响程度的不同采取不同等级的建筑物保护措施;地面无管井降水施工条件下采用辐射井及洞内降水措施。同时,严格按照浅埋暗挖关键工序进行施工,即可解决工程重点难点问题,保证施工质量。Research purposes：It is very difficult to do the construction organization work for construction of the turn-back track from Jinsong Station to the terminal station of Line 8 of Beijing metro due to the manifold styles of structures,unfavorable engineering and hydraulic geological conditions,many ground buildings and underground pipelines.In this paper,the analyses of key points and difficult points in construction of the track are made and the solutions are presented to the technical problems in design and construction of the turn-back track of metro in the area of the Quaternary stratum.Research conclusions：If the metro is built in the area of the Quaternary stratum,the attention should be paid to solving the difference of cross-sections,reducing the transitions,pre-reinforcing the soil mass in the middle part and taking the different measures for protection of the buildings in design.The radiation well should be used along with draining water in tunnel for draining water if there is no condition for building pipe well on ground.At the same time,the construction should be conducted according to the construction procedure for shallow tunnel for overcoming the technical problems in construction and assuring the construction quality.

关 键 词：地铁折返线 浅埋暗挖 结构设计 施工技术 建筑物保护 

分 类 号：U231.1[交通运输工程—道路与铁道工程]