Scanning tunneling microscopy is a nano level surface measurement instrument with high precision,because of the several nanometer tunneling gap,external random low frequency vibration has great influence on the measurement result.

Water supply modes of fire hydrants in subway transit tunnels are discussed with the merits and defects of each mode analyzed.

Treatment measures of the leakage water in regional tunnel of metro;

Comparison of the application of water proof and drainage construction in regional tunnel of metro and mountain tunnel;

Taking the shallow tunneling construction work of one regional tunnel as example the dewatering technique adopted are analyzed from construction difficulties, construction design, ground settlement control and other aspects.

Introduction of shield running tunnel emergency repair of Shanghai rail rapid transit Line 9;

Waterproofing technique in running tunnel of Shenzhen Subway;

On basis of analysis on the causes, features and types of the ground cracks, the paper presents the technical schemes of the structures of the running tunnels crossing the ground cracks recommended in the bidding stage, so that the structures of .

Construction monitoring of Hai-Gong part tunnels of Guangzhou No.2 subway;

In this paper,the countermeasures for subway tunnel fire nowadays are introdnced and a study with computational fluid dynamics(CFD) simulations on the velocity field around a moving train in subway tunnel is carried out.

The conditions of train fire in the tunnel are analyzed.