At present the simulation geophones can not be substituted by digital ones in the hinterland of Junggar Basin, certain array for receiving small trace interval of seismic data is kept in the field.

Construction Monitoring of the Small Spacing Tunnel and Numerical Simulation of Wall Rock s Stability;

As large scale construction of highways in West China,more small spacing tunnels have been adopted due to the limitation of landscape.

Small spacing tunnel are highly accepted in recent years by civil engineers for certain advant.

On the construction of Jiuqu small-distance tunnel;

Numerical simulation analysis of little tremie grouting effect while construction of going into portal at small-distance tunnel;

Taking the project of Wulong small clear distance tunnel driving blasting in Yu-chang high speed highway as the background,used FLAC3D numerical simulation to analyze the vibration effects on surrounding rock in the situation of tunnel driving blasting.

The features of small clear distance tunnel are as following, its floor area is less than separated one,cost is less than multi-arch tunnel,shape is beautiful,but,it is difficult to construct,and need more technology.

There are a great many of tunnels in high-grade highway,it is necessary to adopt the small clear distance tunnel.

The closely spaced tunnel is one of the feasible solutions for tunnel construction, which is an effective supplementary type for the separated tunnel.