| 摘要 |
PROBLEM TO BE SOLVED: To provide a ground improving negative pressure drive unit capable of efficiently converting a drive water of an ejector to water absorbing force and improving water absorbing efficiency.SOLUTION: A ground improving negative pressure drive unit comprises: a water reservoir 10 which reserves water absorbed through a water absorbing pipe 5 liking to a drain material 2; an ejector pump 11 which uses the water in the water reservoir as drive water; and a drainage pump 28 which discharges the water in the water reservoir 10. A water absorbing pipe 5 is communicated with an absorption port of the ejector pump 11. The absorbed water is discharged in the water reservoir 10 by depressurizing the water absorbing pipe 5 by the ejector pump 11. The water in the water reservoir 10 is recycled as the drive water of the ejector pump 11. An absorption port 27 of the ejector pump 11 is positioned under the water surface in the water reservoir 10 and a drainage port is opened above the water surface.SELECTED DRAWING: Figure 1 |
