分离岛式地铁车站交叉洞群施工的周边环境效应分析  

Surrounding Environmental Effects of Intersecting Tunnels Group Construction of Separate Island Station

作　　者：阮艳妹 李进 袁炳祥[3] 凌程坤 罗旭 吴朋波 赵津 RUAN Yan-mei;LI Jin;YUAN Bing-xiang;LING Cheng-kun;LUO Xu;WU Peng-bo;ZHAO Jin(Guangzhou Metro Design and Research Institute Co.,Ltd.,Guangzhou 510000,China;China Railway Tenth Bureau Group Urban Rail Transit Engineering Co.,Ltd.,Guangzhou 510030,China;Guangdong University of Technology School of Civil and Transportation Engineering,Guangzhou 510006,China)

机构地区：[1]广州地铁设计研究院股份有限公司,广州510030 [2]中铁十局集团城市轨道交通工程有限公司,广州510000 [3]广东工业大学土木与交通工程学院,广州510006

出　　处：《科学技术与工程》2023年第26期11405-11413,共9页Science Technology and Engineering

基　　金：国家自然科学基金(51978177,52278336);住房和城乡建设部研究开发项目(2022-K-044);广东省基础与应用基础研究基金(2023B1515020061,2022A1515240037)。

摘　　要：为研究分离岛式车站交叉洞群的周边环境效应,以广州市某暗挖地铁车站为工程背景,采用数值模拟的分析方法,建立了正线隧道、联络通道和站台横通道的多洞室数值计算模型,同时考虑左右线隧道穿越不同岩性的地层,有限元模型地层为不均匀地层。通过数值模拟研究了隧道交叉洞群施工引起的地表沉降、围岩应力应变特征、支护变形受荷规律等,并将模拟结果与相应的现场监测数据对比分析。计算结果表明:中洞施工会引起围岩应力场位移场重分布,上覆围岩会向两侧滑动,造成洞间土体呈受压状态,侧洞会向两侧位移;支护结构最大应力值出现在隧道与联络通道的接口处,并且隧道支护结构应力值大小与距交叉段远近成负相关,离交叉段越远,支护应力值越小。研究成果为今后类似工程条件下城市地铁隧道施工提供参考。In order to study the surrounding environmental effects of intersecting tunnels group construction of separate island station,taking the underground excavation station in Guangzhou as the engineering background,the finite element method and establishes the numerical calculation model of the main line tunnel,connecting channel and the platform transverse channel were used.Considering that the left and right lines tunnels pass through the strata with different lithology,the strata of the finite element model are uneven strata.The surface settlement,the stress-strain characteristics of surrounding rock and the loading law of support deformation caused by the construction of intersecting tunnel group were studied,and the numerical simulation results were compared and analyzed with the measured values on site.The calculation results show that the construction of the middle of the tunnel will cause the redistribution of the displacement field of the surrounding rock stress field,and the upper surrounding rock will slide to both sides,resulting in the compression of the soil between the tunnels,and the two side chambers will move to both sides.The maximum stress value of the supporting structure appears at the interface between the tunnel and the contact channel,and the stress value of the supporting structure is negatively correlated with the distance from the intersection,farther the distance to the intersection,the smaller the supporting stress value is.The research results can provide reference for the construction of urban subway tunnels under similar engineering conditions in the future.

关 键 词：分离岛式车站 交叉洞群 数值模拟 不均匀地层 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]