JPH06136757A - Sand spreading method over bottom of water - Google Patents

Abstract

PURPOSE:To efficiently spread sand over a specified area. CONSTITUTION:Sand 2, 2,... is filled up in a container 1. The container 1 is lowered down directly above a specified area while the upper end sections of hoisting belts 3, 3,... are being hoisted down by a crane 5 and the like. In this case, sand 2, 2,... within the container 1 will never be scattered around into water. The container 1 thus coming down to the bottom of water is turned over with a turn-over rope 6 pulled up from the crane 5 side, so that let sand 2, 2,... within the container 1 drop down to the specified area so as to be efficiently spread.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for spraying sand on the bottom of a water, and more particularly to prevention of foundation overturning of offshore structures.

[0002]

2. Description of the Related Art As a conventional device for spraying sand onto this type of water bottom, a device described in Japanese Utility Model Laid-Open No. 1-111743 is known. In this device, the umbrella-shaped member is fixedly mounted on the yagura-shaped frame projecting at the tip of the ship, the umbrella-shaped member is provided in opposition to the inner surface of the umbrella-shaped member, and the pumping pipe is opened upward. Is a device for sending a slurry consisting of sand and water under pressure and spraying the sand from above the water surface toward the bottom of the water.

[0003]

According to the above conventional example,
Since the sand is scattered from above the water surface toward the bottom of the water, the scattered sand is swept away by the ocean current when reaching the water and scattered around. Thus, it is impossible to efficiently spread the sand thus spread on the target site.

Therefore, there arises a technical problem to be solved in order to sprinkle the sand toward a specific place on the bottom of the water so that the spread sand can be efficiently spread to the specific place on the bottom of the water. The present invention aims to solve the problems.

[0005]

The present invention has been proposed in order to achieve the above-mentioned object, and after the sand-filled container hung by a crane or the like is lowered to a position right above a specific land on the water bottom, Pull the inversion rope extending from the bottom of the sand-filled container to the side of the container to invert the container directly above the specific site so that the sand in the container can drop to the specific site. It is intended to provide a method for sprinkling sand on the water bottom.

[0006]

When the sand-filled container suspended by a crane is lowered, the sand loaded in the container is not scattered by the water flow or the like into the water, and is dropped to a position right above the specific ground. Therefore, by pulling the reversing rope for the container that has reached directly above the specific ground, the container is reversed about the mouth as the center of rotation,
The sand filled in the container is dropped onto a specific area. Therefore, the sand is not washed away by a water stream,
It will be spread efficiently on the specific area.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a front view of the container 1. The upper surface of the container 1 is opened, and sand 2, 2, ... Is loaded through the opening. After the sands 2, 2, ... Are loaded, the opening may be closed 1a. However, when the container 1 is closed, the closed portion 1a must be easily opened when the container 1 is inverted.

The suspension belts 3, 3, ... Are attached to the container 1 at a predetermined interval from each other. The hanging belts 3, 3 ... Are close to each other at the bottom 1b of the container 1, and the ends 3a, 3a ... and the vicinity thereof are fixed to the bottom 1b of the container 1 respectively 3b, 3b. Further, the hanging belts 3, 3 ... Are extended upward from the peripheral portion of the bottom portion 1b of the container 1 toward the side portion 1c of the container 1.
At this time, the suspension belts 3, 3 provided on the side portion 1c of the container 1 are passed through the insertion portions 4, 4, ... The other hanging belts 3, 3 ... Which oppose each other are coupled to each other so that they can be hung from the crane 5, for example. Of course, the method of suspension by the crane 5 should not be limited to the configuration described above, and various methods are envisioned.

Further, at the bottom portion 1b of the container 1, the end portions 3 of the hanging belts 3, 3 ... Arranged to face each other.
a, 3a ... Are respectively attached to one side of the bottom portion 1b of the container 1 to a ring-shaped tip portion 6a of a reversing rope 6 arranged along the bottom portion 1b, and the reversing rope 6 is Bent upward at the peripheral edge of the bottom 1b of the container 1,
Further, it extends upward along the side portion 1c of the container 1 and the upper end portion thereof projects upward from the upper surface of the container 1. Further, the reversing rope 6 is fixed to the container 1 with a stopper 7 at the upper part of the container 1. However, as will be described later, when the container 1 is lowered into the water, the fixed state is fixed. It is released so that the inversion rope 6 can be freely pulled upward. Incidentally, one end of the stopper 7 is fixed to the container 1 and the other end is formed so as to be fixed by a velvet fastener. Then, the upper end of the inverting rope 6 is attached to the crane 5 side.

Sand 2, in the container 1 configured as described above
2, and then, as shown in FIG. 3, for example, the rope 5a on one side of the crane 5 installed on the crane ship 8 on the water is attached to the hanging belts 3, 3 of the container 1.
, The upper end of the reversing rope 6 is locked by the other rope 5b of the crane 5, and both the ropes 5a and 5b are loosened, so that the container 1
To drop into the water.

On the other hand, the earth and sand on one side of the foundation 9 of an underwater structure (not shown) may be scraped off by a sudden change in water flow caused by a typhoon or the like, and a large hole 10 may be formed on one side of the foundation 9. . Then, the foundation 9 cannot maintain the stationary state due to the hole 10, and falls down in the direction of the hole 10. Therefore, the holes 10 must be filled with sand. The present invention is mainly used to fill the hole 10. However, as described above, the sand-filled container 1 relaxes the ropes 5a and 5b of the crane 5 and sinks them into the water.
Then, it is made to reach directly above the hole 10. Then, while the container 1 is descending, the sand 2, 2 ...
Will not be scattered in the water. Therefore, if the other rope 5b of the crane 5 locked to the reversing rope 6 is pulled right above the hole 10, the container 1 will be inverted around the upper end of the container 1 as the center of rotation. . In that case, the sands 2, 2 ... In the container 1 fall directly into the holes 10 and are sprinkled, so that the spreading work of the sands 2, 2 ... Is most efficiently performed.

The present invention can be modified in various ways without departing from the spirit of the present invention, and it goes without saying that the present invention extends to such modifications.

[0013]

As described in detail in the above-mentioned one embodiment of the present invention, the sand-filled container is suspended by, for example, a crane and settled down to a specific site on the bottom of the water. Then, when the container reaches the specific place, the container is pulled up by the crane for the inversion rope and inverted, and the sand in the container falls from directly above the specific place and is sprinkled. Therefore, unlike the prior art, the sand sprinkled as in the past does not scatter by being washed away by the water flow while falling in the water, and the sand is sprinkled on a specific place in the water very efficiently.

[Brief description of drawings]

FIG. 1 is a front view of a container.

FIG. 2 is a bottom view of FIG.

FIG. 3 is an explanatory view showing a state where the container is submerged in water.

FIG. 4 is an explanatory diagram showing a state in which the container is submerged just above a specific site on the bottom of the water and inverted.

[Explanation of symbols]

 1 Container 2 Sand 3 Hanging Belt 5 Crane 6 Inversion Rope 9 Foundation 10 Holes

Claims (1)

[Claims] 1. A sand-filled container suspended by a crane or the like is lowered to a position just above a specific surface of the water bottom, and then a reversing rope extending laterally from the bottom of the sand-filled container is pulled. A method for sprinkling sand to the bottom of the water, characterized in that the container is turned over immediately above the specific place so that the sand in the container is dropped onto the specific place.