GROUND IMPROVEMENT COMPOSITE PILE FOUNDATION, INDEPENDENT FOOTING FOUNDATION COMBINED WITH GROUND IMPROVEMENT COMPOSITE PILE, AND METHOD OF DESIGNING INDEPENDENT FOOTING FOUNDATION COMBINED WITH GROUND IMPROVEMENT COMPOSITE PILE

摘要

To provide a ground improvement composite pile foundation with improved horizontal resistance, an independent footing foundation combined with a ground improvement composite pile, and a method of designing the independent footing foundation combined with the ground improvement composite pile.SOLUTION: A ground improvement composite pile foundation 1A comprises: an improved body 7 provided on a surface layer part of a ground 11 and formed of soil and sand of the surface layer part and a solidifying material mixed and stirred with the soil and sand; and one or more piles 9 sunk inside the improved body 7. The surface layer part of the ground 11 is composed of a clay ground. When an outside diameter of the pile 9 is Dp and a distance from the center of the pile 9 to an outer edge of the improved body 7 or a polygon circumscribing the improved body 7 is Lpi, the distance Lpi satisfies the relationship represented by the following formula: 2.6DpLpi3.4Dp.SELECTED DRAWING: Figure 2