STEEL ROD PILE FOR PILE FOUNDATION AND PILE FOUNDATION METHOD USING THE SAME

PROBLEM TO BE SOLVED: To provide a steel rod pile which facilitates the construction of a pile foundation and which can be established on the ground stably.SOLUTION: A steel rod pile 10 comprises a pile body 12 formed like a rod and made of a steel material, a plurality of plate springs 14 equally disposed around the pile body and of which base end parts are fastened to the tip part of the pile body so as to widen in the tip direction of the pile body, a sheath pipe 16 with the length equal to that of the pile body having an engaging hole 24 with which a lifting up tool is engaged, formed in the upper end and having the pile body inserted inside and housing the plate springs so that the tip sides of the plate springs are pressed against the pipe inner wall surface and are closed, and a cap 26 which is mounted on the upper end opening part of the sheath pipe and which constitutes a striking part when the pile body is struck into the ground together with the sheath pipe.SELECTED DRAWING: Figure 1 【課題】簡易に杭基礎の施工を行うことができ、地盤に安定して定着させることができる鋼棒杭を提供する。【解決手段】鋼材料で棒状に形成された杭本体１２と、杭本体の先端部に、その周囲に等配され杭本体の先端方向に向かって拡開するように基端部が固着された複数枚の板バネ１４と、杭本体と同等の長さを有し上端部に引き上げ用具が係合する係合孔２４が形設され管内部に杭本体が装入されるとともに板バネを、その先端側が管内壁面に圧接して閉じられるように収納する鞘管１６と、鞘管の上端開口部に装着され鞘管と共に杭本体を地盤に打ち込むときの打撃部をなすキャップ２６とを備えて鋼棒杭１０を構成した。【選択図】図１