Attachment for forming crushed stone piles and crushed stone pile forming device equipped with it

摘要

PROBLEM TO BE SOLVED: To provide an attachment for forming a crushed stone pile which suppresses a defect in a connection structure between a base end side and a tip end side of a shaft. SOLUTION: A crushed stone pile attached to a crushed stone pile forming device for forming a crushed stone pile in a space formed in the ground, inserted into the ground to form a space, and rising from the ground to form a crushed stone pile in the space. It is an attachment for forming, and includes a cylindrical portion, a shaft that can be separated into at least two of a base end side shaft 50 and a tip end side shaft 42, a connection structure, and a cover 70. The shaft is rotatably arranged in the cylindrical portion and is rotated by a driving force from a driving device. The connection structure is arranged in the cylindrical portion, and connects the tip end portion 52 of the proximal end side shaft 50 and the proximal end portion 44 of the distal end side shaft 42. The cover 70 is arranged in the cylindrical portion and covers the periphery of the connection structure. [Selection diagram] Fig. 5