UNDERGROUND RAILWAY CROSSING CONSTRUCTION METHOD DIRECTLY INSTALLING A PRECAST CONCRETE SLAB CAPABLE OF CONSTRUCTING AN UNDERGROUND CROSSING STRUCTURE BY DIRECTLY INSTALLING THE PRECAST CONCRETE SLAB IN A CONSTRUCTION SECTION

摘要

PURPOSE: An underground railway crossing construction method directly installing a precast concrete slab is provided to directly install a PC(precast) slab in a construction section of an underground railway crossing and to utilize the PC slab as a main structure, thereby improving a construct ability and an economic feasibility, minimizing the depth of excavation, and enhancing the safety of a train running.;CONSTITUTION: An underground railway crossing construction method directly installing a precast concrete slab comprises the following steps: burying multiple pairs of temporary piers under the earth(22) on both sides of a railway(10) in the longitudinal direction of the railway; burying multiple cross beams under the earth to cross the lower part of the railway in order to be supported by the upper ends of the multiple pairs of temporary piers; removing the part of the section in which multiple cross beams are buried for the construction of a first construction section; installing a PC(precast) slab(40) on the first construction section to support multiple cross beams; installing a first replacement railway(12) connected to the railway on the upper surface of the PC slab; constructing a main tunnel by performing a bed excavation under the PC slab; and constructing a underground crossing structure(80) in the main tunnel.;COPYRIGHT KIPO 2013