Abstract In order to assess the safety risk of a subway connecting passage constructed by freezing method, based on relevant references, existing project experience and similar project records, this paper identifies major risk factors in the four construction stages of a subway connecting passage by freezing method, establishes an evaluation indicator system, and proposes a safety risk assessment method for a subway connecting passage constructed by freezing method based on analytic hierarchy process (AHP), fuzzy comprehensive evaluation (FCE) and Bayesian network(BN). Firstly, it uses AHP to calculate the relative weights of various risk events, uses the risk-related economic loss value to describe the impact consequences of risk events, and uses BN to calculate the probability rating scores of risk events. Secondly, combining the risk-related economic loss value with probability rating score, it uses the trapezoidal membership function to calculate the membership of risk event to risk level, conducts the fuzzy comprehensive operation for the weight of risk event and the membership of risk event to risk level, and obtains the overall risk level of a connecting passage constructed by freezing method. Finally, taking Lanzhou Metro Line 1 as an example, the assessed overall risk level of the project is low risk, basically reflecting the actual situation.
Abstract：
In order to assess the safety risk of a subway connecting passage constructed by freezing method, based on relevant references, existing project experience and similar project records, this paper identifies major risk factors in the four construction stages of a subway connecting passage by freezing method, establishes an evaluation indicator system, and proposes a safety risk assessment method for a subway connecting passage constructed by freezing method based on analytic hierarchy process (AHP), fuzzy comprehensive evaluation (FCE) and Bayesian network(BN). Firstly, it uses AHP to calculate the relative weights of various risk events, uses the risk-related economic loss value to describe the impact consequences of risk events, and uses BN to calculate the probability rating scores of risk events. Secondly, combining the risk-related economic loss value with probability rating score, it uses the trapezoidal membership function to calculate the membership of risk event to risk level, conducts the fuzzy comprehensive operation for the weight of risk event and the membership of risk event to risk level, and obtains the overall risk level of a connecting passage constructed by freezing method. Finally, taking Lanzhou Metro Line 1 as an example, the assessed overall risk level of the project is low risk, basically reflecting the actual situation.
ZHAI Qiang GU Weihong JIN Zhaoqin
.Safety Risk Assessment for a Subway Connecting Passage Constructed by Freezing Method[J] MODERN TUNNELLING TECHNOLOGY, 2021,V58(4): 57-66
2021, Vol. 58 