Seepage-Stress Coupling Analysis of River-Crossing Tunnel Excavating
- 责任者：Jin Xiaoguang (College of Civil Engineering ; Chongqing University ; Chongqing 400045 ; China) ; Li Xiaohong
- 刊名：Hydrogeology and Engineering Geology
- 出版年：2010
- 卷期：37(1)
- 关键词：隧道 ; tunnels ; 围岩应力 ; adjoining rock stress ; 渗流 ; seepage flows
- 页码：p.62-67
- 图表：8 illus., 2 tables, 13 refs.
- 分类号：1702
- issnNo：ISSN1000-3665
- isbnNo：CN11-2202/P
In the paper, appropriate 3D FEM was established according to seepage field boundary and hydromechanical coupling effect of a planned tunnel excavating was analyzed. Seepage-stress coupling equation was established in steady state, pore pressure varying regularity with tunnel excavation and hydromechanical coupling affects to displacement and stress of surrounding rock as well as stress of supports was analyzed. The results of numerical computation show that seepage speed and displacement of rock formation with large permeability coefficient were affected greatly by seepage. Displacement and stress of surrounding rock as well as stress of supports have a rather large increase by seepage influence. Design and construction shou1d consider seepage flow effect.