Journal of Jilin University(Earth Science Edition) ›› 2018, Vol. 48 ›› Issue (5): 1596-1602.doi: 10.13278/j.cnki.jjuese.20180159

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Stability Classification of Tunnel Surrounding Rock During Shield TBM Construction Based on Fuzzy Comprehensive Evaluation

Yang Jihua1, Lu Xinjing1, Yan Changbin2, Qi Sanhong1, Guo Weixin1   

  1. 1. Yellow River Engineering Consulting Co., Ltd, Zhengzhou 450003, China;
    2. School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China
  • Received:2018-06-01 Published:2018-11-20
  • Supported by:
    Supported by National Natural Science Foundation of China (U1504523), Key Science and Technology Research Project of Henan (182102210014) and Independent Research and Development Project of Yellow River Engineering Consulting Co., Ltd(2016-ky56(2))

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Abstract: Considering the difficulty of the traditional method in the classification and evaluation of surrounding rock stability of TBM tunnel, a new system of stability classification of the surrounding rock with shield TBM tunnel is developed. Based on the characters of a shield TBM construction and some regular classification methods, the evaluation factors were selected, including rock rebound value, cutterhead thrust, cutterhead torque, content of rock chips cut by TBM, groundwater flow and angle between the maximum principal stress and the tunnel axis. The multi-factor model of a stability analysis of surrounding rock was established by using fuzzy comprehensive evaluation method. The surrounding rock stability was quantitatively assessed by determining weight vector of impact factors and by selecting membership functions. This method was applied to the stability evaluation of tunnel surrounding rocks during a double shield TBM construction. The results showed that the tunnel sections of No. 1, 2, 3 and 4 were relatively stable, relatively stable, local stabile, and instable respectively. Their maximum membership degrees were 0.494, 0.403, 0.388, and 0.442, corresponding to the surrounding rocks of Ⅱ, Ⅱ, Ⅲ and Ⅳ. The developed method based on fuzzy comprehensive evaluation is reasonable, and the evaluation result is reliable. The research results have reference value for surrounding rock stability evaluation, surrounding rock classification, and support mode selection of shield TBM construction.

Key words: tunnel, shield TBM, surrounding rock stability, fuzzy-synthetical evaluation

CLC Number: 

  • U451.2
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