Risk Assessment Model of Tunnel Water Inrush Disaster in Complex Fault Block Mountain Area

  • Sui Sugang ,
  • Yang Yanna ,
  • Huang Jingyu ,
  • Yu Siyao ,
  • Wang Bangtuan
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  • 1. Yunnan Key Laboratory of Geotechnical Engineering and Geological Hazards, Kunming 650051, P.R. China;
    2. Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co., Ltd., Kunming 650051, P.R. China;
    3. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, P.R. China

Received date: 2024-06-11

  Online published: 2025-03-12

Abstract

A scientific and feasible assessment model of water inrush in tunnel should be able to describe the water inrush characteristics of key parts of tunnel accurately and objectively, and it can also reflect the instability of water inrush disaster. Based on field investigation and hydrogeological analysis, the 1# inclined shaft of Dengloushan tunnel of Miyu Expressway was taken as the engineering background, based on field investigations and hydrogeological analysis, and seven assessment indexes that determine the occurrence of tunnel water inrush disaster was selected to construct the risk assessment model suitable for water inrush disaster of tunnel in fault block structure area combined with catastrophe series method. The article also utilized the existing assessment system proposed by the research team. Both methods were applied to assess the risk of water inrush in a tunnel inclined shaft project. Finally, the two assessment model results were verified and compared with the actual construction of the tunnel excavation water gushing situation. The results showed that: The assessment model of water inrush disaster based on catastrophe progression method has better applicability and accuracy than the existing assessment system in fault block structure area. The research results can effectively guide the prevention and control of water damage in the main tunnel construction of Dengloushan Tunnel. The theoretical assessment model can be extended to the risk prediction of water inrush disaster of water-rich tunnel in complex mountainous areas.

Cite this article

Sui Sugang , Yang Yanna , Huang Jingyu , Yu Siyao , Wang Bangtuan . Risk Assessment Model of Tunnel Water Inrush Disaster in Complex Fault Block Mountain Area[J]. Chinese Journal of Underground Space and Engineering, 2025 , 21(1) : 350 -357 . DOI: 10.20174/j.JUSE.2025.01.38

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