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Gold Science and Technology ›› 2016, Vol. 24 ›› Issue (6): 64-71.doi: 10.11872/j.issn.1005-2518.2016.06.064

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Assessment and Risk Control of Tunnel Collapse Based on the Improved Unascertained Measure Model

CHEN Jianhong1,SONG Can1,WU Shuliang1,LI Qianwei2#br#   

  1. 1.School of Resources and Safety Engineering,Central South University,Changsha   410083,Hunan,China;
    2.School of Resourse and Environment Engineering,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China
  • Received:2015-09-21 Revised:2015-12-06 Online:2016-12-28 Published:2017-01-22

Abstract:

To ensure the safety of constructing tunnels,an improved unascertained measured model was built,using the confidence criterion,to ensure the risk level of tunnel collapse.The steps of risk  assessment include three steps.Firstly selected rock level,depth,ground water conditions,bias angle and unfavorable geology as static indexes,meteoric water,excavation span,support measure and monitor measure as dynamic indexes.Secondly,the matter-element analysis method replacing the entropy weight analysis was used to determine the combination weights of static indexes and dynamic indexes.Finally,a risk aversion method was proposed,which is to lower the risk grade.The presented approach had been applied successfully in evaluating the construction risk of part of Guankouya tunnel.Not only did it judge risk grades exactly,but also it controlled risk factors effectively.This method offered new directions for assessment and risk control of tunnel collapse.

Key words: tunnel collapse, matter-element analysis, unascertained measure model, risk assessment, risk control

CLC Number: 

  • X935

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