Technology of Tunnel Curtain Grouting Method Used in Tongluoshan

Whe tunnel across the water-rich lamination broken rock layer, because of water pressure,it is easy to cause water gushing-out after the tunnel is excavated. By the way, mud and other sudden accident would he happened. The lamination structure of water has the long-term pressure to structure as well as the erosion of concrete which it has bad effect to the structure. Thus crossing the weak rock and broken water-saturated zone, we use curtain grouting method to improve rock, to he sure of pore water is outside of the scope of the excavation and to ensure the security of the tunnel face.