This paper presents the study results on the aerodynamic characteristics for two way railway tunnel ventilation,which include the combine characteristics of jet fan used,the influence of the piston wind in the tunnel and the concentration distribution and the dilution principle of harmful gases.

Reasons analysis and treatment technique of leakage water in one railway tunnel;

Analysis on the project quality management in the construction of railway tunnel;

Application of steel fiber sprayed concrete with machine-processed sands to railway tunnel;

Construction idea and design principle of railway tunnels

Analyses are put forward on the superiorities of the cantilevel tunnelling machine,its feasibility in construction of railway tunnels,as well as the excavation scheme,the formation of complete mechanized set and the auxiliary technologies in the construction of railway tunnels.

RF transmission in electric railway tunnels is studied based on the characteristics of the tunnel walls and the fact that there are catenary and rails as paths of signals.