PRETENSION FLOOR SLAB CONSTRUCTION METHOD BASED ON OVERHANGING CONSTRUCTION

摘要

PROBLEM TO BE SOLVED: To provide a pretension floor slab construction method.;SOLUTION: In a pretension floor slab construction method based on overhanging construction, an upper floor slab and a lower floor slab are constructed by using concrete, and a beam having a box-shaped cross section, which is formed by connecting the upper floor slab and the lower floor slab with a corrugated steel plate, is installed on each construction block having a predetermined length by overhanging construction. When prestress is introduced in a direction perpendicular to a bridge axis of the upper floor slab, a dedicated pretension tension device is used. The prestress is introduced to each block of the overhanging construction by a pretension method. As the reaction of the pretension tension device is received by an existing floor slab and a reaction receiving joist and the pretension tension device is held by the corrugated steel plate and the existing floor slab, the prestress in the direction perpendicular to the bridge axis is applied on the upper floor slab at a time.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2017,JPO&INPIT