基于流固耦合的坡度对TBM斜井围岩的影响研究  

The Analysis of the Effects of the Fluid-structure Coupling Slope on TBM Inclined Surrounding Rocks

作　　者：盛素玲[1] 熊晓晖[2] 熊德敏 

机构地区：[1]浙江建设职业技术学院,浙江杭州311231 [2]中铁十一局集团有限公司,湖北武汉430061

出　　处：《防灾减灾工程学报》2017年第2期243-249,共7页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家科技支撑计划项目(2013BAB10B05);浙江省建设厅课题(2015K79);浙江省教育厅课题(Y201534851)资助

摘　　要：以内蒙古新街台格庙矿区的TBM斜井工程为背景,运用FLAC3D软件建立TBM斜井施工的三维模型,基于流固耦合理论,从孔隙水压力、应力及变形3个方面对TBM隧道和TBM斜井进行对比分析,并研究了坡度对TBM斜井围岩力学特性的影响。研究结果表明:流固耦合条件下,随着施工进度的发展,TBM斜井在拱腰和拱底处的应力和变形值要大于TBM隧道的值。坡度对富水条件下的TBM隧道围岩变形和应力的影响较明显,坡度越大,围岩越易失稳,拱腰处的应力、变形及孔隙水压力变化较大,大坡度TBM斜井施工应重点注意拱腰部位的支护及防排水。研究结果可为富水大坡度的TBM斜井工程设计施工提供理论参考。On the background of TBM slope mine project in the mining area of Taige Temple, Xinjie Town, Inner Mongolia, this paper uses FLAC3D software to establish a 3D model of RBM slope mine construction. Based on the fluid-solid coupling theory, this paper makes comparative analysis of RBM tunnel and TBM slope from three aspects： pressure of pore-space water, stress and deformation. In addition, this paper studies the influence of the slope gradient on the me- chanical properties of the enclosing rock of the TBM slope mine. The results show that consider- ing the fluid-solid coupling conditions, with the construction progress, the TBM slope mine would have higher values of stress and deformation at the haunch and the intrados than the coun- terpart values of the TBM tunnel. The slope gradient has significant influence on the deformation and stress of the enclosing rock of the TBM tunnel under rich water condition. The steeper the slope gradient is, the easier it is for the enclosing rock to lose stability. In particular, the stress, the deformation and the pore-space water pressure have big changes at the haunch. In the con- struction of steep-gradient TBM slope mine, the support for the haunch and water proof and wa- ter discharge at the haunch shall receive more attention. The research results could offer certain extent of theoretical reference to the design and construction of rich-water steep-slope TBM slope mines.

关 键 词：TBM 斜井 流固耦合 坡度 数值模拟 

分 类 号：U459.3[建筑科学—桥梁与隧道工程]