| 摘要 |
PROBLEM TO BE SOLVED: To place a large amount of land-fill material while suppressing water contamination to a minimum extent. SOLUTION: An angle of oscillation of a tube 30 is adjusted, and when the lower end of a cylindrical member 54 reaches a sea bed B, the lower end of the cylindrical member 54 sinks into floating mud deposited on the sea bed B. The land-fill material is pushed ahead inside the tube 30 by a screw blade 34 in a cohesive state. The land-fill material pushed out of a lower end 3010 of the tube 30 hits a rectifying member 52, and it is directed toward the inside of the cylindrical member 54. Then the land-fill material hits the inside of the cylindrical member 54, whereby the inside of the cylindrical member 54 is filled upward from below. Further, the land-fill material with attenuated momentum (flow rate) overflows from the upper end of the cylindrical member 54 to the outside of the same, and the land-fill material with attenuated momentum (flow rate) is sequentially deposited on the sea bed B around the cylindrical member 54 in a spreading manner, so that the land-fill material may be placed. COPYRIGHT: (C)2011,JPO&INPIT
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