Because of such reasons,as the water content of clays is high,and the cohesion of clays is very bad,the strength of clays decays quickly by the effect of turbulence,the bearing capacity of the foundation is low,ect,during the construction of large-span shallow-burried clay tunnel,insuitable construction mode will lead easily to collapse.

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;

The article presents, after a study, the handling and behavioural forecast of boulder in soft soil tunnel.

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.