Time-dependent tunnel deformations in homogeneous and heterogeneous weak rock formations |
| |
| Institution: | 1. International Research Organization for Advanced Science and Technology, Kumamoto University, Kumamoto City, Kumamoto Prefecture 860-8555, Japan;2. Division of Sustainable Resources Engineering, Hokkaido University, Sapporo City, Hokkaido 060-8628, Japan;3. Department of Mining and Materials Engineering, McGill University, Montreal, Quebec H3A 0E8, Canada;1. The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China;2. Beijing Collaborative Innovation Center for Metropolitan Transportation, Beijing 100124, China;3. Key Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, China;1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics of Wuhan, Chinese Academy of Science, 430071 Wuhan, China;2. School of Civil Engineering, Wuhan University,430072 Wuhan, China;3. School of Civil Engineering and Architecture, Suzhou University of Science and Technology, 215011 Suzhou, China;4. State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, 221008 Xuzhou, China;1. College of Transportation Science & Engineering, Nanjing University of Technology, China;2. Politecnico di Torino, Italy;1. Department of Geotechnical Engineering and Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai, 200092, China;2. State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining & Technology, Beijing, 10083, China;3. School of Civil and Environmental Engineering, Nanyang Technological University, Singapore, 639798, Singapore;4. Dept. of Geophysics, Kangwon National Univ., Chuncheon, Gangwon-do 200701, Republic of Korea |
| |
| Abstract: | To investigate long-term, time-dependent tunnel deformations, this study employs a non-linear rheological model capable of considering the tertiary creep behaviour of the rock mass (Okubo and Fukui, 2006). A model parametric study is undertaken with a 3D numerical model encompassing a tunnel. The results show that the tunnel walls start to deform at an accelerating rate after a lapse of ten years. The results offer an explanation to previously reported tunnel instability cases. A 3D numerical model encompassing weak rock formation obliquely intersecting with the tunnel is then constructed. The analysis yields asymmetric wall deformation pattern, suggesting the need for optimizing rock supports. |
| |
| Keywords: | Time-dependent tunnel deformation Numerical analysis Weak rock formation Tertiary creep |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
