Compare the amount of buffer required to stabilize the single and twin road tunnels constructed in jointed rock

Abstract

To cross the high mountains and steep, rather long and winding path done a lot to reduce the slope length, can be used out of the tunnel. Road tunnel into two groups, depending on the direction of one-way and two-way tunnels are divided. Due to the number of lanes on the highway, tunnel consists of two types: twin tunnels (with two separate small schools with one-way flow) and single tunnel (with a large crosssection of two-way flow) is used. Costs mainly during tunnel construction, excavation level and appropriate support systems for stabilizing the wall they depend. The system required maintenance depends on the terrain and its geotechnical properties. The rock mass, fractures are one of the most important factors in determining the amount of buffer is considered. In this paper we investigate the number of joint sets in the stabilizers is required for single and twin road tunnels will be examined