Numerical analysis on the influence of joints inclination on the characteristics of deformation and stability of tunnel
The paper adopts the interface element to simulate the joints so as to systematically and quantitatively study the deformation around tunnel,the mechanic state of lining and the stability under different inclining angles of joints.The result shows that the deformation around tunnel deteriorates mainly along the joint during the inner convergence effects of surrounding rock.When the inclining angle α=45°,the deformation around the tunnel is most serious,followed by that when α=90°,α=60°,α=30° and α=0°.At the same time,the influence of inclining angle on the distribution of the axial force of lining is comparatively small.But the distribution of bending moment and shear change obviously where the joints penetrate the tunnel.The tunnel stability of surrounding rock is the poorest when α=90° and the tunnel is most stable when α=0°.The stability of surrounding rock changes little when α is between 30° and 60°.The research result provides an effective calculation method for the forecast of deformation,the design of structure and the stability analysis of jointed tunnel.It is also helpful for the monitoring of construction and calculation of jointed tunnel in the future.
interface element jointed tunnel deformation around tunnel mechanics state of lining stability
Tang Xiaosong Wang Yongfu Zheng Yingren
School of Civil Engineering,Chongqing University,Chongqing 400045,China;Chongqing Engineering and Te Chongqing Engineering and Technology Research Center of Geological Hazard Prevention and Treatment,C
国际会议
西安
英文
157-162
2013-07-27（万方平台首次上网日期，不代表论文的发表时间）