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在牧场隧道设计中,首先根据牧场隧道工程地质特点,对牧场隧道进、出口的稳定性进行了分析,指出了隧道洞口段的风险问题与风险影响因素,并结合层次分析法对隧道进出口段的各种风险源的重要度进行了排序。在此基础上,采用专家调查法对隧道风险等级进行了评估,给出了洞口段风险发生的概率等级和风险损失等级及最终的风险等级。最后,提出了牧场隧道洞口段稳定的设计与施工的控制措施,为隧道安全设计提供指导。
In the pasture tunnel design, firstly, the stability of the entrance and exit of the ranch tunnel was analyzed according to the geological characteristics of the ranch tunnel, the risk problems and risk factors of the tunnel entrance section were pointed out, and the combination of analytic hierarchy process The importance of various risk sources were ranked. On this basis, the expert’s investigation method is used to evaluate the risk level of the tunnel, and the probability level, the risk loss level and the final risk level of the tunnel section risk occurrence are given. Finally, the control measures of stable design and construction at the mouth section of pasture tunnel are put forward to provide guidance for the design of tunnel safety.