急曲线盾构隧道近接施工研究  

A Study on Interaction Effect of Radical Curve Shield Tunnel with Approaching Construction

作　　者：闫志刚[1] 赵玉成[2] 杜立峰[1] 

机构地区：[1]石家庄铁路职业技术学院,石家庄市050000 [2]石家庄铁道大学,石家庄市050000

出　　处：《公路》2012年第10期219-222,共4页Highway

基　　金：河北省教育厅资助科研项目;城市轨道交通近接施工相互作用研究;项目编号Z2011210

摘　　要：城市急曲线盾构隧道工程的近接施工,会引起复杂的地层效应和隧道结构内力,施工难度大。广州城市轨道交通5号线动物园～杨箕区间隧道为典型的近接急曲线盾构隧道,具有大坡度、急曲线、上下重叠、近接施工等特点,为了确保工程的顺利开展,需正确理解和评估两隧道的相互作用。基于有限元分析,对此急曲线隧道区段上下重叠、45°平行与水平平行三种典型近接施工进行了数值模拟,分析研究了后建隧道对先建隧道的相互影响,对隧道结构内力与变形以及地层位移的变化规律分别进行了总结分析,所得结论指导了工程现场施工,为同类工程积累了经验。The approaching construction of radical curve shield tunnel will cause complicated stratigraphic effect and tunnel structure internal force.The shield interval of zoo station to Yangji station is a typical radical curve shield tunnel that is located in Guangzhou Metro Line 5 shield tunnel.To ensure tunnel constructing successfully,the interaction of two tunnels should be evaluated exactly.With FEM,the Guangzhou Metro Line 5 shield tunnel construction is taken as the research object and the analysis and study about approaching construction of radical curve shield tunnel are carried out.There are three typical approaching constructions of radical curve shield tunnel that are the parallel,overlapping and duplication.Aiming at these different structure forms,the rules about surface settlements and interaction between two tunnels are studied.The results of three different typical radical curve shield tunnels are important to ensure the construction safety.

关 键 词：盾构隧道 急曲线 近接施工 相互影响 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]