To provide a technique capable of easily performing the work for coupling and connecting joint parts of adjacent columnar bodies and improving the support strength of the whole columnar body by increasing the engaging force of the outer-periphery surface of the joint part and soil cement.
The joint parts T mounted respectively on the main bodies of the adjacent columnar bodies are coupled together at the shaft core X of the main body thereof for the purpose of being sunk. A joint part 1 of a cylindrical part or a joint part 2 of a shaft part is mounted on one end part of the main body of the columnar body, and the joint part 2 or the joint part 1 is mounted on the other end part thereof. The joint parts 1, 2 of the main bodies of the adjacent columnar bodies are composed in a freely fitted manner. Coupling mechanisms R for coupling the fitted joint parts 1, 2 mechanically are mounted on both of the joint parts T, and recessed and projecting parts O are formed in the outer-periphery surfaces of both of the joint parts T.
SAIKAI KENJI
OTSUKI MITSUGI
SOUWA AKIO
AOKI ISAO
HORIKIRI SETSU
KUBOTA KK