METHOD FOR CONSTRUCTING UNDERGROUND STRUCTURE OF RAILROAD USING STEEL PIPE ROOF OF TWO-SIDE SEMICIRCLE ARCH TYPE AND APPARATUS FOR PRESSING GUIDANCE PIPE

摘要

Provided is a method for constructing an underground structure of a railroad using a two-side semi-circular arch type steel pipe roof and an apparatus for indenting a guidance pipe. The method for constructing an underground structure of a railroad comprises a step of installing a thrusting base and an arrival base by performing primary bed excavation on the ground by areas corresponding to both sides of a train (a); a step of installing a thrusting frame on the thrusting base and arranging a guidance pipe for an H-beam and a guidance pipe for a semi-circular arch steel pipe having an apparatus for indenting a guidance pipe (b); a step of indenting an H-beam and a semi-circular arch steel pipe for an upper structure by thrusting the guidance pipes for the H-beam and the semi-circular arch steel pipe (c); a step of performing secondary bed excavation for thrusting a vertical wall and installing a thrusting worktable (d); a step of indenting an H-beam and a semi-circular arch steel pipe for the vertical wall (e); and a step of installing and arranging re-bars inside the semi-circular arch steel pipe and placing concrete (f).