Rotation penetration method of rotation penetration steel pipe pile and rotation penetration steel pipe pile

摘要

Disclosed is a supporting force and circumferential surface frictional force effectively available steel pipe pile from the ground, can be realized by a simple structure, is intended to enable significantly reduced and thus production costs. The apparatus includes a cylindrical pile body 11, the lower end disk-shaped end plate 12 which is composed is fixed to the said pile body 11, a pair of rectangular steel block body in the end plate 12 the bottom, above a digging blade 13 made is fixed spaced apart from one another so as to be substantially point symmetrical to the axis N of the pile body 11, said digging blade 13, the shaft of the corner portion of the steel block body corner portion S which is located farthest to the Mind N, together with the positioned directly below the outer periphery of the end plate 12 bottom side 14 of the long side of the steel block body, the end plate 12 above steel at the bottom a side surface 15 of the short side of the block body manufactured by a parallel is characterized by being arranged so as to cross the virtual plane Q1 passing through the axis N. [Selection Figure] Figure 2