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本文采用高密度电法对永古高速公路乌鞘岭隧道北洞口、安远隧道南洞口附近活动断裂带进行了探测,准确给出了隧道口附近毛毛山南麓活动断裂与毛毛山北麓活动断裂的具体展布、发育特征及与初选隧道位置的关系,为隧道地震工程条件与稳定性评价提供了可靠依据。探测结果表明。乌鞘岭隧道北洞口场地位于毛毛山南麓活动断裂下盘的影响带上,断裂最新活动面距隧道上行出口与下行进口最近距离约264m及284m,地震不会影响洞口安全,但须加强防护;安远隧道南洞口位于毛毛山北麓活动断裂全新世左旋正走滑活动区段断面及破碎带上,存在地裂的可能。应采取相应措施。
In this paper, the high-density electrical method is used to detect the active fault zone near Wudongling tunnel of Wuguangling Tunnel and the south entrance of Anyuan Tunnel by using the high-density electrical method, and the activity faults at the south foot of Maomaoshan and the northern foot of Maomao Mountain are given accurately. The specific distribution of faults, their developmental characteristics and their relationship with the location of primary tunnels provide a reliable basis for the evaluation of tunnel seismic conditions and stability. Proof results show. The site of Beiudongkou Wushaoling Tunnel is located on the impact belt of the active fault in the south of Maochaoshan. The latest active fault surface is about 264m and 284m away from the upstream and downstream entrances of the tunnel. The earthquake will not affect the safety of the entrance but the protection should be strengthened The south hole of Anyuan Tunnel is located at the active fault zone of the Lost-positive Synoptic Zone in the northern foot of Maomao Mountain and the fractured zone, which may cause the occurrence of ground fissures. Should take corresponding measures.