METHOD OF GATHERING SOIL AND SAND BY DREDGER AND ITS DREDGER

摘要

PROBLEM TO BE SOLVED: To effectively utilize soil and sand while selecting soil and sand on a dredger.;SOLUTION: A selecting net for a selector M on the dredger S is installed at a plurality of stages 2a, 2b, the selected grain size is reduced gradually towards the lower stage, and the selected soil and sand are recovered by chutes 3, 12, 15 respectively. When the gathered soil and sand are selected previously, they are of advantage to post-treatment. When sucked-up soil and sand are all recovered in this case, soil and sand are utilized effectively while the increase of the turbidity of an underwater section can be inhibited by disused soil and sand. The selected soil and sand are forwarded into a pit in the dredger and recovery boats 13, 14 in both neighbors of the dredger by each chute 3, 12, 15. The chutes 12, 15 are bent freely.;COPYRIGHT: (C)2001,JPO