JPH041814B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sand scattering boat used for spreading sand in a water transport method employed when covering soft ground.

[Prior art]

In recent years, when covering soft ground, a water transport method has been used in which the target area is surrounded by an embankment, water is introduced into the embankment, and a slurry of sand is spread from a sand discharge boat. There is.

The conventional sand scattering boat used for the above method has a horizontal scattering pipe installed at the bow of the ship, and the scattering pipe releases sand directly under the bow of the ship. If there is a protrusion on the soft ground, there is a problem that the sand dumping boat cannot reach the top of the protrusion, so sand is dumped from directly below the scattering pipe onto the ground that the sand dumping boat cannot access. In order to do this, it was necessary to increase the amount of water introduced into the embankment and deepen the water depth, which was extremely uneconomical.

[Purpose of the invention]

Therefore, the present invention has been made to solve the above-mentioned conventional problems, and is to minimize the amount of water introduced into the embankment when covering soft ground with the water transport method using sand dumping boats. The purpose of this project is to carry out economical soil covering work.

[Structure of the invention]

The present invention provides a sand discharge ship with a slurry supply pipe, a scattering pipe for discharging sand downward, and a jump pipe for discharging sand in the horizontal direction, and connecting the scattering pipe and the jump pipe to the slurry supply pipe, The scattering pipe and the jump pipe are each provided with on-off valves, and the sand dumping boat is constructed such that sand is discharged from each or both of the scattering pipe and the jump pipe by operating the on-off valves.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan view of a sand dumping ship in an example of the present invention, and FIG. FIG. 3 is an enlarged perspective view of the tube.

First, this sand dumping ship floats in water introduced onto soft ground surrounded by an embankment using the water transport method, and spreads sand in the form of slurry from a slurry supply pipe 2 to a scattering pipe installed at the bow of the ship. 3 and jump pipe 4 to sprinkle sand onto the soft ground to be covered with soil.

This slurry supply pipe 2 is installed almost horizontally on the ship's hull, and as shown in FIG.
and a jump pipe 4, and a plurality of sand discharge ports 6 are provided on the lower surface of the scattering pipe 3 so as to enable sand to be discharged directly under the vicinity of the bow of the ship. The ship is equipped with a force-reducing enclosure 7 as shown in FIG. 3, so that the sand discharged from the sand outlet 6 is covered with soil directly under the bow of the ship.

Further, the jump pipe 4 has a protrusion 8 that can discharge sand horizontally from the hull, making it possible to forcefully discharge sand in the horizontal direction in front of the hull.

Incidentally, the scattering pipe 3 and the jump pipe 4 provided in the sand dumping ship 1 of the present invention are usually installed near the bow, but are not particularly limited to the bow.
It is also possible to discharge sand from the scattering pipe 3 and the jump pipe 4 at the same time, or from only one of them.

Moreover, the shape of the force-reducing enclosure 7 provided at the sand discharge port 6 of the scattering pipe 3 can be varied depending on its purpose.

〔Effect of the invention〕

Therefore, in the sand scattering boat of the present invention, the sand scattering pipe is equipped with a force reducing enclosure, so that the sand can be spread within a certain range without being dispersed in the water, and the efficiency can be improved. This has the effect of allowing better work to be done and making it easier to manage the sand removal work.

In addition, a jump pipe is installed that blows sand forward from the bow of the ship, making it possible to spread sand in areas where the water is shallow and cannot be accessed by a sand dumping ship.
The amount of water introduced into the embankment is smaller than before,
It has the advantage of being economical.

In particular, in the present invention, since both the scattering pipe and the jump pipe are provided, and on-off valves are provided for each, each on-off valve is simply operated while the dispersion pipe and the jump pipe are in the same position, that is, without moving them at all. By simply doing this, you can freely and easily release sand only from the scattering pipe, only from the jump pipe, or even from both the scattering pipe and the jump pipe. It is characterized by the effect that the sand release ratio and sand release amount can be changed freely and easily.

[Brief explanation of drawings]

Fig. 1 is a schematic plan view of a sand dumping ship according to an example of the present invention, Fig. 2 is an enlarged perspective view of the scattering pipe and jump pipe provided at the bow of the ship shown in Fig. 1, and Fig. 3 is an energy reducing vessel shown in Fig. 2. FIG. 3 is an enlarged perspective view of the enclosure. 1...Sand dumping ship, 3...Scatter pipe, 4...Jump pipe,
6...Sand discharge port, 7...Lowering enclosure, 8...Protrusion part.

Claims (1)

[Claims] 1 A sand dumping ship is equipped with a slurry supply pipe, a scattering pipe that releases sand downward, and a jump pipe that releases sand horizontally, and these scattering pipes and jump pipes are connected to the slurry supply pipe, and the scattering pipe and jump pipe are connected to the slurry supply pipe. Each jump pipe is provided with an on-off valve, and sand is discharged from each or both of the scattering pipe and the jump pipe by operating the on-off valves.