Tunnel Chamber Spraying System

  Steel mesh shotcrete requires the erection of steel mesh. Fixing the steel mesh on the roof of the tunnel is not only time consuming and expensive, but also quite dangerous. Steel mesh shotcrete can spray and support along with the actual contour of rock excavation, and the steel mesh shotcrete also needs to meet the spray coverage thickness of 30-50mm after filling the recessed area after the steel mesh is filled.

        For shotcrete with steel mesh, if the shotcrete technology is not appropriate, it is difficult to fill the rock depression and loose area behind the steel mesh. As the concrete is not well combined with the rock, it will be destroyed soon and the steel mesh will be corroded soon.

       Compared with the total project cost, the cost of steel brazed sprayed concrete is 50%-60% lower than that of steel mesh sprayed concrete, which greatly saves the construction period and improves the construction efficiency.

       For example, on the rock surface with developed fissures, the use of steel mesh shotcrete often consumes 40% more concrete than that of steel brazed shotcrete.