- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | SHAO Jiang, ZHU Baolong, LI Tao. Stress Characteristics of Tunnel Lining Structures Under Landslides with Different Angles of Sliding Zone[J]. Journal of Southwest Jiaotong University, 2021, 56(6): 1214-1221, 1231. doi: 10.3969/j.issn.0258-2724.20200054
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With more and more tunnel projects passing through landslide areas, research on the interaction between landslide and tunnel is particularly important. To better understand the influence of landslide with different angles of sliding zone on the stress of tunnel lining structure, taking the Nanping tunnel of Datong–Zhungeer railway as an example, laboratory model tests and numerical simulations were conducted to study the influence characteristics and variation rules of tunnel lining structure stress under different angles of sliding zone (namely 0°, 10°, 20°, 30°, 40° and 50°). The results show that the smaller the angle of sliding zone, the greater the tunnel deformation, and the greater the bending moment, shear force and earth pressure acting on the tunnel lining structure. Moreover, the maximum stress appears at the arch foot, and the forces on the left and right tunnel arch structure are asymmetric, showing a phenomenon of bias pressure. The calculation of the vertical bias stress ratio of the left and right sides of the tunnel arch structure shows that at the arch shoulder position, when the angle of sliding zone is 0, the bias stress ratio is 1.17. As the angle of sliding zone increases, the difference between the left and right stresses of the tunnel lining arch structure is getting smaller and smaller, tending to balance around the arch; but at the arch foot position, the bias stress ratio gradually increases with the increase of the angle of sliding zone. The stress difference between the left and right sides of the tunnel lining linebreak left="0.7" right="1.3"/> arch structure becomes larger and larger. For the bias tunnel, the minimum bias ratio is 1.08 and the maximum bias ratio is 1.87.
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