Journal of Shandong University(Engineering Science) ›› 2025, Vol. 55 ›› Issue (5): 165-178.doi: 10.6040/j.issn.1672-3961.0.2024.256

• Civil Engineering • Previous Articles    

Influence of thickness defects on the stability of the primary support structure and risk assessment

LIU Qiming1, WANG Wenhui1, PAN Yingnan1, GAO Yaohui2, ZHENG Chengcheng3, HE Peng3*   

  1. LIU Qiming1, WANG Wenhui1, PAN Yingnan1, GAO Yaohui2, ZHENG Chengcheng3, HE Peng3*(1. Zhejiang Pan'an Pumped Storage Co., Ltd., Jinhua 322300, Zhejiang, China;
    2. Power China Huadong Engineering Corporation Limited, Hangzhou 310014, Zhejiang, China;
    3. Institute of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266590, Shandong, China
  • Published:2025-10-17

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Abstract: To investigate the damage that thickness defects caused to the initial support structure, this study adopted an actual engineering background, considered the specific locations and extents of thickness defects, and conducted a statistical analysis of their distribution characteristics within the tunnel. Finite element numerical simulation was employed to deeply analyze the mechanical characteristics of the initial support structure under different types of thickness defects. Additionally, the CRITIC(criteria importance through intercriteria correlation)method was used to comprehensively evaluate various risk indicators(such as the span and location of defects)affecting the safety of the initial support structure, determining the degree of influence of each indicator on structural safety. Research indicated that either located at the vault position or spanning more than 25 degrees exerted the most significant impact on the safety of the primary support structure. The research results could provide references and insights for the prevention and control of similar tunnel diseases.

Key words: primary support structure, thickness defects, field inspection, numerical simulation, weight analysis

CLC Number: 

  • TU921
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