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介绍了延边长安隧道不良地质地段突发性冒顶的情况和处理措施,分析了塌方的原因及特点,重点介绍了洞内和地表联合加固的方案设计和实施效果,同时探讨了穿越极其风化花岗岩隧道避免塌方的途径。
This paper introduces the situation and the treatment measures of the sudden roof collapse in the poor geological section of Chang’an tunnel in Yanbian. The causes and characteristics of the collapse are analyzed. The scheme design and implementation effect of the combined reinforcement of the tunnel and the surface are emphatically introduced. Meanwhile, the tunnels crossing the extremely weathered granite tunnel Way to avoid landslides.