The special geological conditions of mountain tunnel scheme selection

摘要

According to the different topographic and geologic conditions of mountain highway tunnel project has been "It is difficult into the hole and out the hole" argument. The paper is WuGuan high-speed road asymmetric bias multi-arch tunnel, and the orthogonal hole separated tunnel, near the mountain steep high slope of shallow buried tunnel into the hole as an example. Through the construction of practical engineering, analysis in special conditions is done and the mechanical mechanism of hole program is correctly chosen. Importance and the experiences are summarized, to guide the engineering practice.