DRAIN MATERIAL EMBEDDING METHOD AND DRAIN MATERIAL EMBEDDING APPARATUS

PROBLEM TO BE SOLVED: To provide a drain material embedding method and apparatus in which a distal end member for excavation of a casing can be surely left underground after excavation, and the casing can be connected/disassembled without using an installation machine with a leader.SOLUTION: A drain material embedding apparatus 10 comprises: a construction machine including a boom 13 of which the distal end position can be moved in three-dimensional directions by a joint or an elongation/contraction mechanism; a rotary drive mechanism 14 including a vertical rotary shaft which is drooped at a distal end of the boom 13; a first casing 20 for drain material embedding in an elongated, hollow and cylindrical shape provided at a lower side of the rotary shaft of the rotary drive mechanism 14 and including a scoop member 22 protruding from a circumferential surface in a diameter direction; and a distal end member 31 which is engaged with an attachment 21 provided at a lower end of the casing in a removable manner. The drain material embedding apparatus 10 is configured such that the distal end member includes an excavation part for excavating soil, the casing 20 is rotationally driven by the rotary drive mechanism 14, thereby also rotationally driving the distal end member 21 integrally with it, and the excavation part excavates soil below it.