Numerical Simulation Analysis on Surrounding Rock Deformation Characteristic of Tunnel with Karst Cave Beside
详细信息
- 责任者：Mo Yangchun （Civil Engineering College ; Southwest Jiaotong University ; Chengdu 610031 ; China） ; Zhou Xiaojun
- 刊名：Hydrogeology and Engineering Geology
- 出版年：2008
- 卷期：35(2)
- 关键词：隧道 ; tunnels ; 围岩变形 ; adjoining rock deformation ; 有限差分法 ; finite difference method
- 页码：p.30-34,44
- 图表：6 illus., 4 tables, 11 refs.
- 分类号：1702
- issnNo：ISSN1000-3665
- isbnNo：CN11-2202/P
摘要
In combination with the construction process of Baoshiyan tunnel in Dazhou-Chengdu High-speed Railway, by using the finite-difference software FLAC 3D the characteristics of tunnel with karst cave beside are simulated and the numerical analysis concerning the influence of different dimensions and different distances of karst cave on the surrounding rock deformation is carried out. The results indicate that after the tunnel is excavated, the surrounding rock is convergented toward the karst cave and the tunnel. The surrounding rock between the karst cave and the tunnel is convergented in opposite direction, where is the most dangerous zone. The displacement of surrounding rock of hance, side wal1 and vault near the karst cave is larger than the corresponding parts away from the karst cave.