| With the rapid development of traffic infrastructure construction in our country, the scale of the tunnel project is also rapidly increasing, China's tunnel construction has entered the high quantity, high technology, four high construction difficult, high-risk, in tunnel engineering construction phase of the safety risk assessment are also increasingly important. Tunnel engineering is faced with various aspects of more and more risks, and the complexity and uncertainty of tunnel construction.In this paper, through the Analysis of Risk factors and risk events mainly aimed at the engineering geological characteristics and the design and construction of the tunnel scheme, in the process of tunnel construction detailed identification and analysis of the possible risk factors, mainly including the hole instability risk, risk of landslides, mud water bursting flood risk, and other risks.According to the actual situation of the project, the paper will be to engineering based on interval analytic hierarchy process(AHP) and expert scoring method of integrated risk assessment method as the method of safety risk assessment of long tunnelIn order to ensure the safety of tunnel construction, need to monitor in the tunnel construction, puts forward the design method of the risk early warning value, determination the of risk factor and dynamic risk evaluation based on monitoring data control. In addition, the long tunnel based on the risk accident of the tunnel and puts forward the hole instability risk control, fault fracture zone of risk control, mud poured water outburst risk control and emergency contingency plans.Finally use gao-jia garden north station~yu-dai hill station tunnel project as an example,collected in the process of the construction risk source of the monitoring data, combined with geological conditions and bad geological condition. Paper studies the mechanism of risk of tunnel construction, the surrounding environment on the influence of the engineering and risk analysis. |
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