To provide a placing device capable of easily placing at a desired position, preventing influence on environment and reduction of quality due to jet and separation of an object to be conveyed, and allowing simple moving and installation to increase economical property when conveying dredged sediment by a pneumatic pressure feeding construction method.
The gradually enlarged pipe type placing device 31 is formed by a pipe body which is connected with a pressure feeding pipe 17 for feeding an object to be conveyed under pressure by the pneumatic pressure feeding construction method, whose inside diameter is enlarged more than the inside diameter of the pressure feeding pipe 17 at a connection end and is gradually enlarged along the direction of conveyance, and in which a final end arranged by facing a placing position and discharging an object to be conveyed becomes the maximum. The branched pipe type placing device 33 is formed by a pipe body which has a plurality of branched pipes 33a in which a final end discharging an object to be conveyed through a branched pipe 33b is arranged so as to face a placing position and in which the total of the inside diameter cross sectional area of the branched pipe 33b is larger than the inside diameter cross sectional area of the pressure feeding pipe 17.
OGAWA HAJIME
ITO YASUNARI
ABE TOMONORI
KITAZAWA KENJI
KANAYAMA HIROYUKI
IKEDA MASAHARU
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