双线盾构隧道注浆范围对地表横向沉降的影响研究  

Research on inf luence of grout-injecting around shield-driven double-track tunnel on transversal settlement of ground surface

作　　者：王志杰[1] 许瑞宁[1] 胡磊[1] 段明明[1] 吴根强[1] 

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,四川成都610031

出　　处：《铁道建筑》2015年第5期89-92,共4页Railway Engineering

基　　金：中央高校基本科研业务费专项资金资助项目(SWJTU11ZT33)

摘　　要：以一城市地铁双线盾构隧道施工为背景,对盾构隧道掘进引起的地表变形进行了现场监控量测、数理统计回归分析及数值仿真模拟,研究了地表横向沉降与双线盾构隧道拱顶处注浆范围之间的关系。研究结果表明:双线盾构隧道施工中,在拱顶处采用深孔注浆技术可有效控制地表沉降。引入地表横向最大沉降修正系数,对日本学者竹山·乔关于多层土层地表沉降计算公式进行了改进,使之适用于采用深孔注浆技术时地表沉降的计算,可为同类工程提供参考。Taking the double-track shield tunnel construction in one city as background, site monitoring, mathematical statistical regression and numerical simulation of surface deformation caused by shield tunnel excavation were conducted and the relation between ground transverse setdement and grouting range of double-track shield tunnel vault was discussed. The research results showed that the deep hole grouting technology at the vault can effectively control the ground settlement during double-track shield tunnel construction. Ground settlement calculation equation of muldlayer soil proposed by TakeyamaJoe was improved by introducing the correction factor of maximum ground transverse setdement, which could adapt to ground settlement calculation by using deep hole grouting technology and provide a reference for similar engineering.

关 键 词：双线隧道 注浆范围 竹山·乔公式 地表沉降 修正系数 

分 类 号：U445.43[建筑科学—桥梁与隧道工程]