SAND LAYING EXECUTION METHOD OF LARGE WATER DEPTH WEAK GROUND

摘要

PROBLEM TO BE SOLVED: To execute sand laying on the sea bottom weak ground of large water depth in an accurately rational cost by simultaneously using a plurality of sand pile reclamation hollow pipes to spray sand in a wide range and attaching a blade to the edge part of the hollow pipe.;SOLUTION: Sand pile reclamation hollow pipes 6 are continuously mounted on the ship of a sand pile reclamation ship 1 at prescribed pitches, and erected along a leader ship respectively to be vertically ascended and descended. A hopper is provided upward of the hollow pipe 6. A blade 9 of constitution having a leveling angle is attached to the lower end of each hollow pipe 6 to be rearward of the advancing direction of the hollow pipe 6. A weight type sand surface meter 10 is attached to the lower end of the hollow pipe 6 through a support pipe further rearward of the blade 9. The sand surface meter constitutes a depth measuring system by combination of a depth indicator on the ship, depth surveying is executed, and the lower end position of the hollow pipe is adjusted by the result. Thereby scattering of material sand can be prevented to improve the spray precision of sand laying.;COPYRIGHT: (C)2000,JPO