PILE REINFORCEMENT STRUCTURE FOR EXISTING BUILDING, AND CONSTRUCTION METHOD FOR THE PILE REINFORCEMENT STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide a pile reinforcement structure for an existing building and a construction method for the pile reinforcement structure that eliminate a need to install a new footing, simplify the pile reinforcement work for an existing building and curtail the construction period, while preventing reduction of the building space and suppressing horizontal seismic force exerted on a pile head of an additional pile and therefore reducing the pile diameter, and consequently reducing the reinforcement work cost significantly.;SOLUTION: A pile reinforcement structure for an existing building comprises an open hole through a footing beam or a footing slab of the existing building, and a pile head connecting member connected to a pile head of a press-in pile additionally installed that pierces through the open hole and fixed on the footing beam or the footing slab by an anchor installed after concrete curing. A gap is formed to allow horizontal displacement of the pile head between an outer peripheral surface of the pile head of the press-in pile located inside the open hole and a wall surface of the open hole, and the additionally installed press-in pile is connected semi-rigidly with the footing beam or the footing slab of the existing building.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2016,JPO&INPIT