考虑流固耦合效应的双模盾构施工对地表变形的影响  

The Influence of Dual Mode Shield Construction Considering Fluid-structure Coupling Effect on Surface Deformation

作　　者：刘邦[1] LIU Bang(Sinohydro Engineering Bureau 8 Co.,Ltd.,Changsha 410004,China)

机构地区：[1]中国水利水电第八工程局有限公司,长沙410004

出　　处：《交通科技》2023年第5期109-113,共5页Transportation Science & Technology

摘　　要：为研究考虑流固耦合效应的盾构施工对地表的影响,文中以穗莞深城际西宝区间大直径双模盾构在复杂地层中施工为背景,采用midas GTS NX软件建立三维有限元模型,探究渗流作用下TBM模式在硬岩中掘进时的地表变形规律。结果表明,对于位于裂隙发育、富水性及透水性中等的硬岩隧道,隧道开挖引发的地下水渗流会加剧隧道周围及地表的位移变化,因此,在计算盾构施工对围岩及地表带来的影响时,应当考虑流固耦合效应。In order to study the influence of shield construction considering the fluid-structure coupling effect on the surface,taking Suiguanshen intercity Xibao section large-diameter dual-mode shield construction in complex strata as the background,midas GTS NX software is used to establish a three-dimensional finite element model to explore the surface deformation rule of TBM mode tunneling in hard rock under the action of seepage.The results show that,for the tunnel located in hard rock with fissure extension,moderate water abundance and permeability,the groundwater seepage induced by tunnel excavation will aggravate the displacement changes around the tunnel and on the surface.Therefore,the fluid-structure coupling effect should be taken into account when calculating the influence of shield construction on surrounding rock and the surface.

关 键 词：双模盾构 流固耦合 全断面硬岩 地表变形 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]