Jinjiguan tunnel on Chuan-Zang highway at Ya-an was entirely open to traffic on January of 1995, however,about in 2001 the two tunnels of it appeared water penetration and deformation to a different degree with crevices and upheaval.

Hydrogeological Investigation and Prediction of Water Yield of Jigong Mountain Tunnel;

The selection of the routes and construction plans of Guanjiao tunnel on the second line of Xining～Ge ermu section of Qinghai～Tibet railway is presented in detail in the paper.

In this paper, based on the additional second-line Guanjiao tunnel of Xining to Golmud of Qinghai-Tibet Railway the engineering background, to resolve the deep tunnel design, construction and groundwater protection as a starting point, do the numerical simulation analysis of K307+00～K307+200 section of Guanjiao tunnel on the application of MIDAS-GTS finite element program.

Test and Analyses of Bracing Stress on Sand Loess Stratum for Hanguguan Tunnel;

Talking about the Technology of the Hanguguan Tunnel Construction in Zhengxi Passenger Special Line;

Processing technology for dissolving caverns breach of Yesanguan Tunnel

Cause of the "8.5" water burst incident at Yesanguan tunnel along the Yi-Wan railway