| 摘要 |
PROBLEM TO BE SOLVED: To prevent a mounted structure from being settled unevenly, by remaining a perpendicular degree of a pile even when liquefaction occurs.SOLUTION: According to an underground reinforcement construction method, a number of piles are installed in the ground around an existent structure. The method includes a penetration step, a tilting step and a connecting step. In the penetration step, pile members 10 and steel members 12 are installed in the ground as an integrated body by using the perpendicular pile members 10 which are installed at predetermined intervals around the existent structure as piles and one or more orthogonal steel members 12 which are connected to lower portions of the pile members 10 in such a manner that the lower end side thereof is rotatable via a support shaft, and disposed along side portions of the pile members. In the tilting step, the steel member 12 installed together with the pile member 10 in the penetration step is rotated while directing the upper portion side of that steel member toward an upper portion of an adjacent pile member which is installed separately, with a support shaft 14 as a fulcrum. In the connecting step, the upper side of the steel member 12 tilted at a predetermined angle in the tilting step is connected to the upper portion of the adjacent pile member 10. |
