JPH055309A - Method and float apparatus for constructing mound-like underwater structure - Google Patents

Abstract

PURPOSE:To quickly construct a mound-like underwater structure with good accuracy by preventing the diffusion of mound material to be charged into water. CONSTITUTION:A float device 10 having an opening 12 through which a mound material is charged and a guide part 14 to be hung down from the opening 12 into water by a given length, which is opened in a given shape on its tip, is moored to a given position. A mound material 21 transported to near the float 10 is charged into the opening 12 by a bucket 20. While adjusting the length of the guide 14 and the position of the float 10, a desired shape of mound- like underwater structure is constructed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a mound-like underwater structure and a floating body device used in the method.

[0002]

2. Description of the Related Art Mound-shaped underwater structures, which are formed by stacking materials for building a mound such as stones and blocks in water, have been constructed as a base for placing caisson of a breakwater. , Was not constructed as an upwelling structure. When a mound-like underwater structure is constructed as an upwelling generation structure to enhance the fish reef effect, etc., the upwelling action varies depending on its shape, arrangement, etc., and therefore it is desirable to construct it accurately in a predetermined shape.

The conventional mound-like underwater structure has been constructed by using an open-bottom earth carrier, a grab ship, or the like. That is, the bottom open soil transport method opens the bottom of the soil transport vessel loaded with the mound material and drops the mound material into the water, and the grab boat method uses a grab bucket that holds the mound material and a crane. Is used to insert the material at a predetermined position.

[0004]

However, in such a conventional method for constructing a mound-like underwater structure, in the above-mentioned bottom-opening earth transport ship, the mound material to be input easily diffuses until it reaches the sea floor, It was difficult to accurately build a mound-shaped underwater structure into a predetermined shape. On the other hand, with a grab boat, it is possible to build a mound-like underwater structure with high accuracy by lowering the grab bucket to the seabed, but since the amount of mound material gripped by the grab bucket is small, the grab bucket can be raised and lowered multiple times. Therefore, there is a problem that it is not possible to carry out a quick loading operation.

Therefore, the present invention has been made to solve the above-mentioned problems, and it is possible to prevent the diffusion of the mound material to be introduced and to construct a mound-like underwater structure with high accuracy, and to introduce it in a short time. A method for constructing a mound-like underwater structure capable of performing work and a floating body device used in the method are provided.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and its gist is to provide a mound material charging opening and a predetermined length at the tip of the mound material for suspending it in water for a predetermined length. A step of mooring a floating body device having a shape-opening, for example, a tubular guide member at a predetermined position by a mooring line, and a mound material transported by a gut ship, various earth transport ships, etc. in the vicinity of the floating body device. It is characterized by comprising a step of throwing into the opening by a bucket, a belt conveyor or the like of a grab ship, and sequentially moving and adjusting the position of the floating body device and the length of the guide member to construct a structure of a desired shape. It is in the method of constructing a mound-like underwater structure.

Another aspect of the present invention is to tension and moor the floating body device to a predetermined water depth, move a bottom-opening type soil carrier loaded with a mound material above the floating body device, and move the bottom of the ship. A method for constructing a mound-like underwater structure, which comprises a step of opening a floating body device toward a charging opening and charging a mound material.

Still another subject matter of the present invention is a floating device used in the method for constructing a mound-like underwater structure,
A floating body having a charging opening in the center, a tubular guide member that can be expanded and contracted vertically from the charging opening so as to open in a predetermined shape at the tip, and the floating body is held at a predetermined position on water or in water. And a mooring member.

Here, the tubular guide member is not particularly limited as long as it is made of a material having sufficient strength and specific gravity for suspending in water. In order not to be affected by the flow, for example, steel rod,
It is preferable to use a member that is processed into a net-like shape by a wire, a chain, or the like at intervals such that the charged mound material does not pass through. Further, the expansion and contraction of the guide member can be performed, for example, by sliding a plurality of unit cylindrical bodies that are overlapped with each other at the time of contraction.

As the mound material, it is preferable to use stone or various blocks such as coal ash concrete blocks.

[0011]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

In the embodiment of the present invention shown in FIG. 1, first, the floating body device 10 is towed by another ship or is made to travel by itself by a power means equipped to the floating body device 10, for example, a conical mound-shaped underwater structure 11. Move to the sea area to be constructed and mooring line 15
Moored at a predetermined position. The floating body device 10 includes a floating body 13 as a frame having a mound material charging opening 12 in the center, and a cylindrical shape that is suspended from the charging opening 12 in the water while reducing its diameter, and has a circular opening at the lower end. Body 1
4 and a mooring line 15 attached to the floating body 13.
In addition, a fender 18 is attached to the periphery of the floating body 13 to prevent damage to the floating body 13 and the hull when a ship such as a grab boat 16 is horizontally mounted. Further, the bottom surface of the floating body 13 and the periphery of the charging opening 12 are reinforced by an iron plate 17. On the other hand, the tubular body 14 is formed by stacking two unit tubular bodies 19 of a funnel shape, which are processed into a plate shape or a net shape using a steel plate, a steel rod or the like, and whose diameter is reduced downward, and the upper unit tubular shape. The body 19 is welded and fixed to the lower end of the charging opening 12, and the lower unit tubular body 19 is slid up and down along the same to expand and contract the tubular body 14. The slide of the lower unit tubular body 19 can be performed, for example, via a wire attached to the unit tubular body 19. An ultrasonic probe 26 is attached near the lower end of the lower unit tubular body 19, and the mound-shaped underwater structure 1 is constructed by this.
Manage the outcome of 1.

The floating device 10 moored at a predetermined position.
From the grab boat 16 that was installed next to this, the loading opening 1
A mound material 21 such as a stone material or a coal ash concrete block is charged into the container 2 by the bucket 20. The charged mound material 21 drops along the charging path defined by the tubular body 14 without diffusing, and reaches the bottom of the sea through the circular tip opening 22 of the tubular body 14. That is, since the distance from the tip opening 22 to the seabed is short, the mound material 21 can be accurately introduced into a planned place. Moreover, since it is not necessary to lower the bucket 20 of the grab boat 16 to the seabed, the loading operation can be performed quickly.
In this embodiment, the conical mound-shaped underwater structure 11
The cylindrical body 14 having a circular opening at the tip was used to construct the above, but by changing the tip opening 22 into a predetermined shape,
It is also possible to construct a mound underwater structure having any other shape such as a semi-cylindrical shape. It should be noted that by further moving the mooring position sequentially by the positioning means and the power means of the floating body device 10 before or after the charging of the mound material, or by sequentially adjusting the length of the tubular body 14, it is possible to more accurately. Mound structure 1 in the desired shape
1 can be built. That is, for example, when the conical mound-shaped underwater structure 11 is constructed from the cylindrical body 14 having the circular cross section, its length is adjusted so that the tip end opening 22 of the cylindrical body 14 is always located immediately above the mound. By doing so, the position of the top of the mound is stabilized, and the angle of repose (1: 1.
The mound-shaped underwater structure 11 can be constructed so as to be in a state close to (5: 1: 3.0).

FIG. 2 shows another embodiment of the present invention. In this embodiment, the floating device 10 is moored by the mooring lines 15 to a water depth at which the earthmoving ship 23 can pass above. Then, the open-bottomed clay carrier 23 loaded with the mound material 21 is moved above the floating body device 10, and the bottom of the ship is opened to directly charge the mound material 21 into the charging opening 12. According to this method, even a large-scale mound-like underwater structure 25 that requires a large amount of mound material 21 can be quickly and accurately constructed.

In the present invention, it is not always necessary to use the mooring cable 15 to moor the floating body device 10. For example, as shown in FIG.
As shown in FIG. 4, it may be attached to the crane pontoon 24 or the like for mooring, or a jacket type structure or the like may be assembled from the seabed and fixed thereto.

[0016]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, the floating body device provided with the mound material charging opening and the guide member having a predetermined shape at the tip is moored at a predetermined position, and the mound material is attached via the floating body device. Since the material is charged by a bucket or the like, the mound material to be charged is prevented from diffusing, and the position of the floating device and the length of the guide member are sequentially moved and adjusted to accurately obtain a mound-shaped underwater structure having a desired shape. And it can be built quickly. In addition, by tensioning the floating body device to a predetermined water depth, moving the bottom-opening type soil transport ship above it, and directly inserting the mound material,
Even a large-scale mound-shaped structure can be quickly and accurately constructed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing another embodiment of the present invention.

FIG. 3 is an explanatory diagram showing still another embodiment of the present invention.

[Explanation of symbols]

 10 Floating body device 11,25 Mound-shaped underwater structure 12 Input opening 13 Floating body 14 Cylindrical body (guide member) 15 Mooring line 16 Grab ship 20 Bucket 23 Bottom-opening type earthmoving ship

Claims (1)

Claim: What is claimed is: 1. A floating body device, comprising: a mound material charging opening; and a guide member that is suspended from the opening in water for a predetermined length and opens at a tip in a predetermined shape. A mound that comprises a step and a step of charging the mound material conveyed near the floating body device into the opening, and moving and adjusting the position of the floating body device and the length of the guide member to construct a structure having a desired shape. Method for constructing water-like structures. 2. A step of tensioning and mooring the floating body device to a predetermined water depth, and a bottom-opening type earthmoving vessel loaded with mound material is moved above the floating body device and the bottom of the ship is opened to insert the mound material. A method of constructing a mound-like underwater structure comprising a process and a process. 3. A floating body having a charging opening in the center, a vertically-extendable and contractible tubular guide member suspended in a funnel shape from the charging opening so as to open in a predetermined shape at the tip, and the floating body above or below water. The floating body device used in the method for constructing a mound-like underwater structure according to claim 1 or 2, comprising a mooring member which is held at a predetermined position.