Abstract: Avalanche often appears in mountain tunnel excavation under the complex geological conditions. It could lead to heavy damage. The general situation of Fanjialing tunnel is introduced at first. Further the factors those affect avalanche are analyzed. According to these factors the treatment principle and scheme are both presented in paper. It obtain a good affect in Fanjialing tunnel project.

Key words: tunnel, av alanche, treatment technology

摘要： 在复杂地质条件下的山岭隧道施工中经常发生较大的坍方,危害极大.本文介绍范家岭隧道发生大坍方的情况,分析坍方产生的原因,制定坍方治理的原则和方案、实施过程,并对治理效果进行了论述.

关键词: 隧道, 坍方, 处理措施