PROBLEM TO BE SOLVED: To provide a sand compaction pile material, sand compaction pile and sand compaction pile developing method, which can restrict adverse effect on surrounding environment while maintaining effect of compacting surrounding ground.;SOLUTION: A sand pile compaction pile material according to this invention is a sand compaction pile material developed underground by a sand compaction pile method and is made of steel slag or recycled concrete with particle diameter of 5 mm or larger and 40 mm or smaller. A sand compaction pile 10 according to this invention is a sand compaction pile 10 developed underground by the sand compaction pile method and is made of two layers or more of vertically laminated particulate material in which a lower layer is made of steel slag and an upper layer is made of the sand compaction pile material.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2017,JPO&INPIT
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