Assessment and Risk Control of Tunnel Collapse Based on the Improved Unascertained Measure Model
Received date: 2015-09-21
Revised date: 2015-12-06
Online published: 2017-01-22
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.
CHEN Jianhong , SONG Can , WU Shuliang , LI Qianwei . Assessment and Risk Control of Tunnel Collapse Based on the Improved Unascertained Measure Model[J]. Gold Science and Technology, 2016 , 24(6) : 64 -71 . DOI: 10.11872/j.issn.1005-2518.2016.06.064
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