›› 2018, Vol. 39 ›› Issue (1): 265-274.doi: 10.16285/j.rsm.2017.0825

• Geotechnical Engineering • Previous Articles     Next Articles

Analysis of interaction when tunnel orthogonal crossing deep-seated landslide and the corresponding control measures

LIU Tian-xiang1, WANG Zhong-fu2, 3   

  1. 1. Sichuan Provincial Transport Department Highway Planning, Survey, Design and Research Institute, Chengdu, Sichuan 610041, China; 2. Institute of Geotechnical and Hydraulic Engineering, North China University of Water Resources and Electric Power, Zhengzhou, Henan 450045, China; 3. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China
  • Received:2017-04-26 Online:2018-01-10 Published:2018-06-06
  • Supported by:

    This work was supported by the Research Project from Ministry of Transport of China (2013318800020) and the Transportation Science and Technology Project of Sichuan Province (2013A1-3, 2012C14-2).

Abstract: When highway tunnels are constructed in the southwest mountainous area in China, they often have to pass through the landslides and other adverse geological disasters. Especially, the tunnel orthogonally crossing the landslide is considered as the most complicated situation. In this case, two serious conditions are coupled, i.e., deep-seated landslide mass with a great thickness and exposed slip surface of landslide. Thus, the coupled action leads to strong interactions between landslide and tunnel, which also can induce the deformation and crack diseases of landslide and tunnel. In this study, a highway tunnel is investigated, which orthogonally crosses an old landslide with an over 60 m thickness in the southwest mountainous area. Due to the interaction of the tunnel-landslide system, the mechanism of the engineering diseases is deeply studied. The numerical analysis method is used to calculate and analyze the stress and deformations of landslide and tunnel as well. Finally, the calculated results are compared with those obtained by the recommended transfer coefficient method. The results verify that the numerical analysis method is more reasonable for analyzing the interaction between the landslide and the tunnel. Meanwhile, it is proven that the final control measures based on stress deformation control theory has obvious technical and economic advantages. At present, the tunnel has successfully passed through the landslide. As it is rare to easily manage this complex tunnel-landslide system, its design analysis method and comprehensive prevention measures provide helpful references for the similar projects in the future.

Key words: tunnel-landslide system, stress deformation control, numerical analysis, orthogonal crossing, control measures

CLC Number: 

  • U 452

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