Variation characteristic analysis of a structural parameter for surrounding soils in loess tunnels;

Construction technologies of loess tunnel at shallow-buried biased opening section;

On roof ripping construction of incline shaft of large section loess tunnel in fork road section;

Research of constructing skill of double-line yellow soil tunnel slant-well pulling into the top hole;

Analysis of stability of ultra-large cross section yellow soil tunnel;

Combined with the situation of Renjiagou tunnel project,it introduces the constructing craft of circle-digging preserved core method,and brings forward the problems in the construction,so as to solve the safety problems of yellow soil tunnel construction,and ensure constructing process of the project,which can be reference for familiar projects in the future.

Lishi Tunnel is the first loess multi-arch tunnel in China.