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山区道路泥石流、滑坡减灾已成为保障道路工程和交通安全的重要问题。隧道泥石流的发生过程一般可分为孕育、潜伏和发生3个阶段。本文以兰渝铁路为工程背景,通过对勘察时所遇泥石流区的地形地貌、地层岩性、地质构造、水文地质特征、人类活动与植被条件等泥石流形成条件的研究,分析了其发生条件和一般特征,据此提出预防隧道泥石流的关键是使其不能同时具备3个形成条件,有针对性地提出防治措施及建议。
Debris flow in mountainous areas and landslide disaster reduction have become important issues in road engineering and traffic safety. The occurrence of tunnel debris flow can generally be divided into pregnancy, incubation and occurrence of three stages. Based on the engineering background of Lanzhou-Chongqing Railway, this paper studies the formation conditions of debris flows such as topography, formation lithology, geological structure, hydrogeological features, human activities and vegetation conditions encountered in the debris flow area during the investigation. According to this, the key to prevent tunnel debris flow is that it can not have three forming conditions at the same time, and put forward prevention measures and suggestions pertinently.