Safety Risk Analysis and Assessment of Bad Geological Surrounding Rock in Taiping Tunnel of Liuwu Railway
Taiping Tunnel of Liuwu Railway is located in a complex geological environment.It is faced with the challenges of Karst,bedding,fault fracture zone,soft clay and expansive soil.In order to ensure the construction safety,the risk assessment method of combining qualitative and quantitative analysis is used to analyze the safety risk of tunnel surrounding rock.Through the analytic hierarchy process(AHP)to build a risk assessment model to determine the relative importance of geological factors,and calculate their comprehensive risk weights.The results show that Karst,bedding slip and fault fracture zone are the main high risk factors,and comprehensive measures such as advance prediction,strengthening support design and real-time monitoring should be taken during construction.The risk control suggestions provided a scientific basis for the safety management of tunnel engineering under similar geological conditions,and helped to improve the safety and reliability of tunnel construction.
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