FOOTING INTEGRATED FOUNDATION PILE STRUCTURE AND FOOTING INTEGRATED FOUNDATION PILE CONSTRUCTION METHOD

摘要

PROBLEM TO BE SOLVED: To enable a footing to be easily constructed on a foundation pile using a concrete-based precast pile.SOLUTION: A concrete pile body 2 is covered with a steel pipe 10. The steel pipe 10 above the pile body 2 is a projection 12. A precast pile 1 is constructed by disposing a low strength concrete 16 in the projection 12. (a) A pile hole 32 is bored from the ground surface 31 to bury a lower pile 33 and the precast pile 1. (b) The concrete 16 in the projection 12 is removed. (c) Outer peripheral side of the projection 12 of the steel pipe 10 is covered with a lower part 23 of a cylindrical attachment 20, and first open holes 13, 13 of the precast pile 1 and second open holes 26, 26 of the attachment 20 are communicated, and the steel pile 10 and the attachment 20 are fixed with bolts 38 and nuts 39 to construct a footing integrated foundation pile structure 50. (d) One end of an underground beam 41 for footing is fixed on a side face 25 of the attachment 20. The footing is constructed by arranging other necessary bars and installing concrete.SELECTED DRAWING: Figure 4