The Special Geological Conditions of Mountain Tunnel Scheme Selection

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