Abstract: A self-sinking, axial passage foundation pile and method are provided. The pile is preformed with an axial bore which is capable of accommodating a rotatable shaft. At one end of the pile a drill bit is affixed to the shaft and at the other end a driving means is attached to the shaft in order to rotate the drill bit. In this configuration the rotational drilling torques are transmitted by the shaft without importing torque to the pile. Accordingly, the pile need not be specially reinforced to accommodate the bore hole drilling torques. Furthermore, the invention encompasses the novel method for installing the unique pile disclosed.

Abstract: A method for establishing an anchor inside of a retaining wall is described; in which an auger bore is excavated through said retaining wall with an earth auger and thereafter by reversing the rotation of said earth auger an enlarged bore is formed at the extreme end portion of said auger bore; and in which an auger head and an auger shaft are separated from each other to leave an anchor plate formed integrally with said auger head as well as a rod connected to said anchor plate within the enlarged bore and the auger bore, and then mortar is filled in these bores to establish an anchor made of concrete in the earth. In one preferred embodiment of the invention, the rod and the anchor plate are connected to each other by fastening with a nut, this connecting portion being enclosed in a box, and also the peripheral surface of said rod is coated with a synthetic resin film, whereby a provision is preliminarily made such that the rod may be easily extracted from the anchor after the use of the anchor has ended.