TSUNAMI/TIDAL-WAVE RESISTANT REINFORCING CONSTRUCTION METHOD FOR EXISTING GRAVITY-TYPE STRUCTURE

摘要

PPROBLEM TO BE SOLVED: To reduce uplift pressure acting on a bottom face of a gravity-type structure. PSOLUTION: A tsunami/tidal-wave resistant reinforcing construction method is for a breakwater 11 placed on a rubble mound 13 built on the ground 12 of a harbor bottom. A foot-protection block 14 is disposed on the harbor exterior end of the rubble mound 13, and then a gap-filler 15 is laid on a sloped portion of the rubble mound 13 on which the foot-protection block 14 is disposed. Subsequently, a water-sealing plate 16 is disposed over the harbor exterior side of the rubble mound 13, the gap filler 15, and the foot-protection block 14. As a result, sea water inflow to the harbor exterior side of the rubble mound and to the gap filler is reduced, which enables to reduce the uplift pressure caused by incoming waves without accompanying an increase in the weight of the gravity-type structure such as an existing breakwater, or the like. Since the construction method requires merely disposing the foot-protection block, the gap filler, and the water-sealing plate on the harbor exterior side of the rubble mound, the construction work is facilitated. PCOPYRIGHT: (C)2010,JPO&INPIT