新建隧道盾构施工引起邻近地铁隧道沉降分析  

Analysis of adjacent metro tunnel's subsidence caused by shield method construction of new-made tunnel

作　　者：郭菊彬[1] 张昆[2] 

机构地区：[1]西南交通大学(峨嵋校区),四川峨嵋614202 [2]中铁二院工程集团有限责任公司,四川成都610031

出　　处：《四川建筑科学研究》2010年第6期139-141,共3页Sichuan Building Science

摘　　要：以广深港客运专线隧道盾构施工、下穿深圳地铁3号线既有隧道为工程背景,利用FLAC3D软件进行施工过程模拟。探讨了施工过程中新建隧道周边地层位移、既有隧道地面、底部沉降的分布性状以及新建与既有隧道的安全。结果表明,最大沉降点都位于新建与既有隧道的中心线上,沉降分布以各自中心线为对称轴呈左右对称性状,在本地质条件和特定盾构推力情况下,地面沉降和隆起满足要求,既有隧道结构底板沉降满足运营要求。Based on shield construction of GuangShenGang passengers line drop-through Shenzhen metro No3 line tunnel,the construction process is studied with the three-dimensional fast lagrangian analysis of continua（FLAC3D）method.The soil displacement,existing tunnel subsidence,ground subsidence,the safety of the new-made tunnel itself and the adjacent metro tunnel are studied during the construction process.The results shows that the subsidence maximum of new-made tunnel and exting tunnel appears central lines,the subsidence distribution is symmetrical which takes central line as symmetry axis.Under geology condition and specially appointed pressure,the ground subsidence and the upheaving displacement satisfy the demanding,the displacement of the existing tunnel structure satisfies the business demanding.

关 键 词：盾构施工 沉降分布 沉降控制 邻近地铁隧道 

分 类 号：TU433[建筑科学—岩土工程]