STEEL LATTICE GIRDER FOR A TUNNEL AND A CONSTRUCTION METHOD OF A TUNNEL SUPPORT USING THE SAME CAPABLE OF DIRECTLY SUPPORTING THE EXCAVATED SURFACE OF A TUNNEL

摘要

PURPOSE: A steel lattice girder for a tunnel and a construction method of a tunnel support using the same are provided to improve structural stability by preventing a concentrated load from being applied to a point of the steel lattice girder.;CONSTITUTION: A steel lattice girder(1) for a tunnel comprises a first bar(11), a second bar(12), a third bar(13), lattice joints(14), and contact support members. The first bar is curved depending on the curvature of the excavated surface of a tunnel. The second and third bars are arranged in an inverse-triangular shape. The lattice joints connect the first, second, and third bars to each other. The contact support members are formed on the tops of the second and third bars and directly touch the excavated surface of the tunnel.;COPYRIGHT KIPO 2012