REINFORCING METHOD FOR EXISTING CONCRETE PILE OF EXISTING BUILDING

摘要

PROBLEM TO BE SOLVED: To improve the aseismatic performance of existing concrete piles of an existing building with a good execution property at a low cost by spirally winding a material having tension resistance performance on the reinforcement object portions of the existing concrete piles of the existing building, then spraying mortar or concrete. ;SOLUTION: When aseismatic reinforcement is to be applied to hollow existing concrete piles 3, 3 already driven in the ground as the foundation piles of the foundation 2 of an existing structure 1, the ground below the foundation 2 is excavated until the pile head sections 3A, 3A of the existing concrete piles 3, 3 are completely exposed. When an excavation bottom 5 becomes a level lower than the reinforcement object portions of the existing concrete piles 3, 3, multiple spacers 6 are installed along the axial direction on the surfaces of the pile head sections 3A, 3A after cleaning. A PC steel stranded wire 7 is spirally wound on the pile head sections 3A, 3A from above the spacers 6, mortar or concrete 8 is sprayed, and the pile head sections 3A, 3A are back- filled.;COPYRIGHT: (C)1998,JPO