新疆牧场隧道洞口段风险源辨识与风险评估分析

Identification of Security Risk Source and Risk Assessment of the Tunnel Portals of Muchang Tunnel in Xinjiang Autonomous Region

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。

During the design of Muchang Tunnel, the slop stability at Muchang Tunnel exit and entrance are analyzed according to the geological characteristics, and the risk issues of tunnel entrance and its influencing factors are pointed out, and the importance degree of the various security risk source are listed by the matrix method. On this basis, the risk severity degree is evaluated through experts investigation method, and the occurrence probability level, risk loss level and final risk level are put forward. Finally the stability control measures are proposed for construction which can provide guidance for tunnel safety design.