Study on Construction Technology of Tunnel Entrance on High Steep Slope of Sichuan-Tibet Railway

The geological environment along the Sichuan-Tibet railway has characteristics of plate splitting, frequent disasters, complex topography, large cold climate, high and anoxia, etc. It is recognized by world as one most difficult projects so far. Based on construction tunnel entrance steep slope Railway, this paper conducts research construction, reinforcement protection slopes. integrated” system “carbon fiber lightweight active net” technology for are expected to provide a reference slope.