Tunnel working method by means of digging through free face of frontside and slide face and structure of folding metal plates

摘要

The invention ago, in the present invention relates to a tunnel construction method according to the structure of the drilling and the blank steel plate by a free face of the side and inclined plane, dogaeng (道 坑) installing drilled to the construction of rock tunnels of mountain road construction, the sides and while talseok the rock by the free face formed of the bevel and to drilling construction the base tunnel of the rock mass, the structure of construction the base tunnel in the rock is easy any constructions hameuroseo installation constructed of pleated steel plates, and a continuous sheet structure of the fiber shotcrete lining and it will have to be robust and to extend the service life, and to reduce the raw materials to boost the economy.