Earthquake-proof additional strength manner and earthquake-proof reinforcement structure of existing building

摘要

PROBLEM TO BE SOLVED: To provide an aseismic reinforcing method for an existing building, which minimizes a deformation amount of an existing building by preventing an existing foundation from floating due to an earthquake, and prevents high axial force due to tensioning force applied to an anchor from causing an affection on the existing building.SOLUTION: New foundations 6 are provided at a required interval on at least one side face of an existing foundation 2 in an existing building 1. In the new foundation, joint bars 9 are provided in advance on a side facing the existing foundation 2 while being projected, and a ground anchor 7 extending into and anchored in a bearing ground is provided. After the ground anchor 7 is tension-anchored, the ground anchor 7 is provided in the existing foundation 2 and/or a column 5 within a required interval, and thereafter construction anchor bars 8 and the joint bars 9 of the new foundation 6 are connected together as reinforcing-bar lap joints. Concrete 10 is placed within the required interval and/or on the upper part of the existing foundation 2 to integrate the new foundation 6 with the existing foundation 2, and/or the column 5.