【摘要】 雪峰山隧道为上海-瑞丽国道主干线湖南省邵阳-怀化高速公路上最大的控制性工程,全长约7 km,最大埋深约850 m,为典型的越岭长大公路隧道。采用不同方法,对该隧道的断层破碎带、塌方、岩爆及大变形等地质灾害和围岩稳定性问题进行了超前预测预报研究。研究以地质分析为基础,运用了TSP、地质雷达、赤平投影和关键块体检索法、断层错动机制解、室内岩石力学试验、数值模拟以及隧道内地质观测分析等方法对前方各类地质信息开展超前预报,取得了较好的效果,并成功地预测预报了断层F2的出现及无强烈岩爆灾害的可能性,对安全施工提供了保证,可为今后类似工程借鉴。更多还原

【Abstract】 The Xuefeng Mountain tunnel is the largest controlling project of Shaoyang-Huaihua Expressway in Hunan Province which belongs to the Shanghai-Ruili National Key Highway.The length of the tunnel is about 7 km and the largest thickness of its overlay is about 850 m.It is a typical thru-mountain long highway tunnel.Several different methods were used to predict the geologic disaster and stability problems of the tunnel,such as fault,rockburst,large deformation of surrounding rock,etc.Based on geological analysis,methods such as TSP,geologic radar,projection and key block search method,mechanism of fault movement,testing of surrounding rock stress,etc.were applied to forecast the geologic information in tunnel facing frontage;and good effect was achieved;especially the successful prediction and forecast of F2 appearance and zero possibility of strong rockburst.This provided guarantee for the tunnel safety construction,and a good example for other similar projects.更多还原