Crushed stone pile forming apparatus provided with the attachment and the attachment for crushed stone pile formation

摘要

The present invention provides a method of forming a pillar of a medium filling material in the ground, provides a technique for introducing a medium-filling material effectively. A present invention is inserted into the ground so as to form a space, to provide attachment for the crushed stone pile forming to form a crushed stone piles in the space while rising from the ground. This attachment is, I includes a cylindrical portion, and the opening and closing lid,. The cylindrical portion is crushed on holes are formed on the side surface in the central axis direction is at least one elongated hole having a major axis. Lid is able to close the hole on crushed stone from the outside direction of the cylindrical portion. [Selection Figure] Figure 1