| 摘要 |
PROBLEM TO BE SOLVED: To provide a sand collecting device in a sedimentation basin capable of not only efficiently flowing sediment piled on the bottom surface of the sedimentation basin to a trough without remaining in the vicinity of the side wall of the sedimentation basin but also washing a side wall surface in the sand collecting device in the sedimentation basin having a nozzle to flow the sediment piled on the bottom surface to the trough by injecting low pressure water to the bottom surface of the sedimentation basin.SOLUTION: In a sand collecting device by a low pressure sand collecting system that low pressure water is injected from a nozzle disposed in the sedimentation basin to the bottom surface of the sedimentation basin in a state of being discharged with water in the sedimentation basin and sediment piled on the bottom surface of the sedimentation basin is flown and collected in a sand collecting pit located at the bottom center of the sedimentation basin, water is injected to the upper part of the side wall surface of the sedimentation basin from the nozzle disposed in the vicinity of the side wall of the sedimentation basin to each region where the bottom surface of the sedimentation basin is divided into a plurality of regions and flown on a wall surface. |
