POLLUTED WATER DIFFUSION PREVENTIVE METHOD AT TIME OF RECLAMATION WORK AND POLLUTED WATER DIFFUSION PREVENTIVE DEVICE

摘要

PROBLEM TO BE SOLVED: To simplify movement of a sand-flash box during work execution to make a polluted water diffusion preventive effect not influenced by waves and tidal currents by grounding the sand-flash box a bottom surface of which only is opened on a water bottom, settling and accumulating sediment by injecting slurry into the inside of the sand-flash box and discharging polluted water from the inside of the sand-flash box. ;SOLUTION: A collar piece 3 is provided all over an outer surface of a bottom surface by opening only the bottom surface of a steel-made sand-flash box 2. Additionally, an injection pipe 4 to inject sediment slurry into the inside of the sandflash box 2 is provided on an upper surface of the sand-flash box 2, and it is connected to a slurry delivery pipe 5. Additionally, a drainpipe 6 to suck up and drain the polluted water produced at the time when the sediment slurry is injected into the inside of the sand-flash box 2 is provided on an upper surface of the sand-flash box 2, and it is connected to a polluted water delivery pipe 7. Thereafter, the sand-flash box 2 is constituted so that it can be moved by a crane by hooking it on a hook 9 by connecting a rope 8 for lifting it to an upper surface of the sand-flash box 2. As a polluted water diffusion preventive device 1 constituted in this way is made of steel, even when it grounds on a water bottom, it is not influenced by waves and tidal currents.;COPYRIGHT: (C)1998,JPO