| 摘要 |
PURPOSE:To make easier the levelling work of seabed by a method in which a square frame is horizontally hung down in movable manner in every direction from a girder provided on paired rectangular floats by means of a winch and then landed on the seabed, and broken stones are dropped from the tank of the floats onto the square frame. CONSTITUTION:A winch 6 runing vertically and a wire 7 are provided to a vertical girder 5 running sidewards on a cross truss beam 4 connecting both ends of paired rectangular floats 1'. Also, a levelling square frame 8 having expandable legs is hung down horizontally by the winch, and a broken stone tank on the floats 1' is connected with the levelling square frame 8, the primary conveyer 19 for feeding broken stones, a hopper 20, and the secondary conveyer 21. The square frame 8 is landed on the seabed, a screed box 10 is moved, broken stones on the floats 1' are dropped onto the screed box 10 to fill up the square frame 8 with broken stones, and the square frame 8 is moved to the landing position for leveling work. |
