基礎の耐震 (2)

[I-228] Examination of repair method at the time of pile head damage restoration

*高橋 佑斗¹、岩田 秀治¹、鈴木 亨¹ (1. 東海旅客鉄道株式会社)

Keywords:Pile structure, damage control structure, Recoverability, Dense band reinforcement, Deformation performance

The response is less than the yield strength until the L1 earthquake, and the structure is not damaged. If an earthquake larger than L1 occurs, reinforcement and repair may be necessary. If the ground part is damaged, it is relatively easy to confirm and repair the damage, but it is difficult if the underground part is damaged. This time, the displacement of L2 earthquake was loaded to the test piece of pile head model, minimum repair was performed on the pile head where severe damage occurred, and the load test was conducted again and again, and the repair method was examined. Carried out. It was confirmed that the performance was restored to the same level as before the disaster.