| 摘要 |
PURPOSE:To improve the efficiency of dredging, by suspending an air lift pipe telescopically from a platform ship, and by providing the lower end of the air lift pipe with a hood. CONSTITUTION:After an air lift pipe 3 is moved upward or downward by a crane device 4 and is kept so that a distance between the edge section of a hood 10 and the bottom 14 of the water may be set to be a specified distance, pneumatic pressure is fed to the inlet 7 of the air lift pipe 3 from a compressor 5. As a result, a great negative pressure is generated in the air lift pipe 3 near the inlet 7, and ascending current is generated in the air lift pipe 3, and sediment 16 is lifted up from the bottom 14 of the water.
|
