NEGATIVE MOMENT FLOOR SLAB PRESTRESS INTRODUCTION METHOD FOR WHICH PRECAST CONCRETE PC WIRE ANCHORAGE BLOCK AND THIS WERE USED

摘要

PURPOSE: A method for introducing a pre-stress to a negative moment bottom plate slab is provided to extend the common lifetime of a bridge. CONSTITUTION: A method for introducing a pre-stress to a negative moment bottom plate slab comprises: a step of manufacturing a precast concrete PC wire anchorage block(B); a step of manufacturing a steel girder(G) or a pre-stress concrete girder; a step of mounting the steel girder or pre-stress concrete girder on a bridge post; a step of connecting a PC wire anchorage block support fixing rope to a shear connector; a step of fixing a PC wire anchorage block support to the PC wire anchorage block support fixing rope; a step of mounting a PC wire anchorage block on the upper side of the PC wire anchorage block support; a step of mounting a PC wire(10) and connecting a sheath after arranging a bottom plate mold on a girder; a step of pouring floor slab concrete in the mold; and a step of inducing pre-stress in a floor slab by tensioning the PC steel wire which are mounted on the steel anchorage of a precast concrete pc steel wire anchor block.