Method of construction a shallow tunnel using pre-support beam

摘要

More particularly, the present invention relates to an ultra-thin layer tunneling method using a beam, and more particularly, to a tunnelled tunneling method using a beam, in which a toe of the upper part of the tunnel is significantly shallow in comparison with a width of the tunnel, To the superconducting tunnel using a structurally safe beam. In the tunnels where ground subsidence is expected due to soft ground due to soft ground in shallow tunnels, a beam is installed so as to resist the subsidence of the tunnel to the outside of the tunnel influence range due to tunnel excavation at regular intervals in the upper part of the tunnel step; Installing a pre-support to be exposed to a tunnel excavation surface in a vertical direction or a center direction of a tunnel cross-section so as to reinforce the pre-support beam in the pre-beam beam, and fixing the head of the pre-beam beam and the pre- And connecting the pre-support material exposed on the excavation surface to a plate structure such as a shotcrete for excavation surface support when excavating the tunnel. In addition, a pile is vertically provided on the outer side of the tunnel with a pre-beam beam installed on the land portion to connect and support the pile and the pre-beam beam.