地盤材料・一般／土質安定処理・地盤改良 (1)

[III-119] Study on repair and reinforcement for pile foundation using jet grouting

*鎌田 敏幸¹、島村 淳¹、土屋 勉¹、二木 幹夫²、久世 直哉²、田井 秀迪² (1. ケミカルグラウト、2. ベターリビング)

Keywords:Jet Grouting, Pile Foundation, Axial Load Test, Lateral Load Test, Seismic Reinforcement

This paper describes a repair and reinforcement method for a pile (normal/damaged) foundation. The effectiveness of repair and reinforcement was examined by a static axial compressive load test or lateral load test of the pile which was repair and reinforced using jet grouting. Result from the static axial compressive load test for the damaged pile proved that it has a performance not less than the allowable bearing capacity in the initial design. On the other hand, results from the lateral load test for the existing pile proved that it has approximately 2times lateral resistance than the normal pile without soil improvement columns.