| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology for charging a stuffing material into the ground efficiently in a method for forming a columnar object by the stuffing material in the ground. SOLUTION: This attachment for forming a crushed stone pile is inserted into the ground to form a space and forms the crushed stone pile in the space while elevating from the underground part. This attachment includes a cylindrical part and an opening and closing lid. The cylindrical part has a hole for charging crushed stones being at least one long hole having a long axis in the direction of central axis formed on a side face. The opening and closing lid can block the hole for charging crushed stones from the direction of the outside of the cylindrical part. COPYRIGHT: (C)2011,JPO&INPIT
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