Theoretical analysis on the influence of different dip angle reverse faults' dislocation on tunnel structure
Jiao Pengfei1,2 Lai Hongpeng3
1. Geotechnical and Structural Engineering Research Center, Shandong University, Ji'nan 250061, China;
2. Shandong Provincial Transportation Department Road Bureau, Ji'nan 250002, China;
3. Key Laboratory of Highway College Bridge and Tunnel Shanxi, Chang'an University, Xi'an 710064, China
Abstract：For a tunnel project, the finite difference software FLAC3D is used to establish the numerical model, so that the influence of earthquake induced dislocation of reverse faults on the fault-crossing tunnel can be analyzed, and the influence mechanism can be disclosed. It is found that the effect of fault dislocation on the tunnel in active plate is much larger than that of the passive plate, the vertical relative displacement increases linearly with the dislocation spacing, and the impact of the fault on the lining is not affected by the dislocation spacing. Due to the squeezing action between the upper plate and the lower plate of reverse fault, the most adverse position, which is most susceptible to tensile rupture and shear failure is the side wall of lining, next is the vault, and the last is the inverted arch. The maximum principal stress, the minimum principal stress and the shear stress in different positions of the lining increase with the increase of dislocation spacing. The safety and reliability of the present tunnel are assessed in this study, which can be referred by the design and construction of similar tunnel projects.
焦鹏飞 来弘鹏. 不同倾角逆断层错动对隧道结构影响理论分析[J]. 土木工程学报, 2019, 52(2): 106-117.
Jiao Pengfei Lai Hongpeng. Theoretical analysis on the influence of different dip angle reverse faults' dislocation on tunnel structure. 土木工程学报, 2019, 52(2): 106-117.
