APPARATUS FOR TREATING EARTH AND SAND SLURRY

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PROBLEM TO BE SOLVED : To provide an apparatus for treating earth and sand slurry which can continuously perform classification and recovery of sand components by an open channel system for a long period of time without deteriorating a recovery rate or classifying precision. SOLUTION : A plurality of sand storages 17 with cross sections of V shapes which sink at an angle exceeding the angle of repose of sand over the portions from adjacent to an inflow part 11 to adjacent to an outflow part 12 are continuously installed on the bottom of an open channel 13 allowing a dredged slurry (earth and sand slurry) 25 to flow from the inflow part 11 at one end side to the outflow part 12 at the other end side, and sand discharge openings 19 for discharging the sand 26 accumulated in the sand storages 17 and valves 20 opening or closing the sand discharge openings 19 are installed at the bottom parts of the respective sand storages 17. The dredged slurry 25 fed by a pump pressure from a pumping and dredging ship is downwardly fed to the inflow part 11 to flow at a constant flow rate through the open channel 13, the sand 26 is subjected to sedimentation and accumulation in the sand storages 17 to be classified, an amount of accumulation is monitored by level sensors 21A, 21B, and the accumulated sand 26 is discharged by operation of the valve 20. COPYRIGHT : (C)2009, JPO&INPIT