Nippon Steel & Sumikin Metal Products Co., Ltd.

Sakae Maruyama

Takeshi Sawada

Masatoshi Wada

Masamichi Sawaishi

Kimihiro Nakazawa

Tomoyuki Shohji

Tomonori Yagishita

This rotary press-in steel pipe pile includes: a steel pipe; a first blade which is formed in a substantially helical shape on the steel pipe so as to be positioned close to the distal end the steel pipe and in which a first sectorial gap having a central angle is formed in a circumferential direction thereof; and a second blade which is formed in a substantially helical shape on the steel pipe so as to be positioned close to the rear end of the steel pipe with respect to the first blade and in which a second sectorial gap having a central angle is formed in a circumferential direction thereof. The first sectorial gap of the first blade and the second sectorial gap of the second blade are disposed at positions that do not overlap in a circumferential direction, and the central angle of the second sectorial gap is set to be smaller than the central angle of the first sectorial gap.

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Tokyo, Japan

Sakae Maruyama