| 摘要 |
PURPOSE:To save energy required for discharge of soil by a method in which a suction port is provided to a remote-controllable self-propelling vehicle and while deposit sand is spreading into water by an impeller, soil and sand are sucked up, together with water, from the suction port by siphonic action and discharged. CONSTITUTION:A self-propelled vehicle 6 is carried onto the bottom 2 under water, an air hole 17 at the highest position of a flexible suction pipe 11 is opened, and the valve 14a of a discharge port 14 and the valve 8a of a suction port 8 are closed. Water is charged from the hole 17 into suction pipes 8 and 11, residual air is removed, and the hole 17 is closed and the valves 8a and 14a are opened to induce a siphonic action in the water channel leading from the suction port 8 to the discharge port 14. Also, an impeller 16 is turned, and deposit soil 3 is scattered into water, sucked with water 1 into the suction port 8, and discharged from the discharge port 14 to a soil housing 13. A television camera 19 and self-propelling vehicle 6 are operated from an operation section 23 to move the soil to a soil yard. |
