基于流固耦合的坡度对TBM斜井围岩的影响研究

发布时间：2018-12-10 06:53

【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。
[Abstract]:Based on the TBM inclined well engineering in Xinjie Taemiao mining area in Inner Mongolia, the three-dimensional model of TBM inclined well construction is established by using FLAC3D software. Based on the fluid-solid coupling theory, the pore water pressure is analyzed. The stress and deformation of TBM tunnel and TBM inclined well are compared and analyzed, and the influence of slope on the mechanical properties of surrounding rock of TBM inclined shaft is studied. The results show that the stress and deformation of TBM inclined shaft in arch waist and arch bottom are larger than those in TBM tunnel with the development of construction progress under the fluid-solid coupling condition. The influence of slope on surrounding rock deformation and stress of TBM tunnel under water-rich condition is obvious. The larger the slope is, the more vulnerable the surrounding rock is to instability, and the stress, deformation and pore water pressure of arch waist change greatly. Attention should be paid to the support and drainage of arch section in the construction of large slope TBM inclined shaft. The results can be used as a theoretical reference for the design and construction of TBM inclined well with rich water and large slope.
【作者单位】：浙江建设职业技术学院;中铁十一局集团有限公司;
【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
【分类号】：TD262.12

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