富水砾砂岩溶地层地铁区间隧道暗挖施工技术研究  

Study on Construction Technology of Subsurface Excavation for Interval Tunnel of Subway in Rich Water Gravel Sand Karst Stratum

作　　者：农兴中 翟利华 王一兆 陈俊生[2,3] 蒋望涛 NONG Xingzhong;ZHAI Lihua;WANG Yizhao;CHEN Junsheng;JIANG Wangtao(Guangzhou Metro Design & Research Institute Co.,Ltd.,Guangzhou,Guangdong 510010,China;School of Civil Engineering and Transportation,South China University of Technology,Guangzhou,Guangdong 510640,China;State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou,Guangdong 510640,China)

机构地区：[1]广州地铁设计研究院股份有限公司,广东广州510010 [2]华南理工大学土木与交通学院,广东广州510640 [3]华南理工大学亚热带建筑科学国家重点实验室,广东广州510640

出　　处：《施工技术》2019年第5期110-114,共5页Construction Technology

基　　金：亚热带建筑科学国家重点实验室自主研究课题(2015ZC20);中央高校基本科研业务费资助项目(2017MS014);"十三五"国家重点研发计划项目(2017YFB1201204)

摘　　要：以广州地铁3号线北延段机场南站—机场北站区间隧道为工程背景,从施工风险、工期、管线及交通疏通、沉降等方面对比分析CRD工法和单洞双线顶管法,对比有限元模拟计算数据和实际施工监测数据。结果表明:单洞双线顶管法引起地表沉降值、隧道结构拱顶沉降值远小于CRD工法;实际施工过程中,单洞双线顶管法产生的地表位移和土层位移变化趋势与数值模拟一致;单洞双线顶管法与CRD工法相比,缩短了支护时间,降低了带水作业风险,工期可控。实践表明,单洞双线顶管法适用于富水砾砂岩溶地层暗挖地下工程,效果较显著。Taking the tunnel from South Railway Station to North Station of the north extension of Guangzhou Subway line 3 as the engineering background,from the aspects of construction risk,construction period,pipeline and traffic dredging,settlement and so on,the CRD method and pipe jacking method of the single-hole double-line are compared and analyzed,the finite element simulation calculation data and actual construction monitoring data are compared.The results show that the settlement value of the surface caused by pipe jacking method of the single-hole double-line and the settlement value of the tunnel structure are much smaller than that of the CRD method.In the actual construction process,the trend of surface displacement and soil displacement caused by pipe jacking method of the single-hole double-line is consistent with the numerical simulation.Compared with the CRD method,pipe jacking method of the single-hole double-line reduces the support time,reduces the risk of water-bearing operations,and controls the construction period.The practice shows that pipe jacking method of the single-hole double-line is suitable for underground mining of buried water and gravel sandstone,and the effect is quite remarkable.

关 键 词：地铁 富水砾砂 暗挖 CRD工法 顶管法 沉降 施工技术 有限元分析 

分 类 号：U455.4[建筑科学—桥梁与隧道工程] U231.3[交通运输工程—道路与铁道工程]