JPH0724527B2 - Artificial reef - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an artificial fish reef, and in particular, a fish reef installed on the seabed naturally changes over time to activate the fish reef, thereby cultivating marine plants. The present invention relates to an artificial reef that has a positive effect on fish reef function and achieves the perpetuation of fish reef function.

[Conventional technology]

Today, the installation of artificial reefs is important and essential from the perspective of expanding coastal fisheries. From this point of view, artificial fish reefs of various shapes and structures have been proposed in the past.
The effect has been confirmed and put to practical use. However, conventional artificial fish reefs use waste (for example, old tire automobiles) after achieving the original purpose of use, or secondary processed products (for example, cement and cement) that use inexpensively available primary products. It is also a concrete block that uses gravel, etc., and it was not always satisfactory when the cost-effectiveness was calculated over the useful life (5 to 10 years).

[Problems to be solved by the invention]

For various conventional artificial fish reefs, 2 ~
It exerts a remarkable fish reef effect for three years, but then the ecology of marine flora and fauna around the fish reef deteriorates, and the fish reef function tends to gradually disappear.

Therefore, the object of the present invention is to change the fish reef morphology with age, to constantly change the direction of the ocean current, activate the ecological cycle of marine flora and fauna in the fish reef environment, and provide a suitable living environment for fish over a long period of time. It is in providing artificial reefs that can.

[Means for solving problems]

The artificial fish reef according to the present invention is a polygonal prismatic body having a horizontal bottom suitable for stationary installation on a horizontal plane and a vertical side at one side edge of the bottom to form a gently sloping surface above the horizontal bottom. A base framework consisting of, and when the base framework is installed on the sea bottom with a single body or a plurality of combinations, it is crushed to a predetermined size on the inclined upper surface part and its peripheral part of the single or a plurality of combinations of the base framework. A large number of split stones are piled up to form a space in which the marine flora and fauna are easily proliferated by the basic framework and the split stone piles stacked on it, and further, the sloped upper surface part is deteriorated due to secular change and a part of the split stones is formed. It is characterized in that it is connected in a grid pattern with receiving beam members that have a relatively short service life to the foundation framework that collapses inside the foundation framework and changes the ocean current to the foundation framework.

In the above artificial fish reef, the foundation framework forms a steep slope portion and a reverse slope portion adjacent to the gently sloping surface portion provided above the horizontal bottom portion and the vertical side portion, and further the vertical side portion. It is possible to extend a triangular protrusion that forms a stone stopper of split stones on the side edge of the boundary between the sloping surface and the gentle slope.

It is also possible to assemble the basic frameworks having the same structure by assembling the horizontal bottom portion and the gently sloping surface portion on the same surface or the relative surface to assemble in a mountain shape.

[Action]

In the artificial fish reef according to the present invention, the bridge beam material is connected to the split stones piled up on the foundation framework in a grid shape, and a net material having a relatively short life is stretched on each of these grid portions. By supporting this, a part of the split stones will fall into the inside of the basic framework due to aging, and the fish reef environment can be activated for many years.

〔Example〕

Next, embodiments of the artificial fish reef according to the present invention will be described in detail below with reference to the accompanying drawings.

1 to 3 show a unit structure as an embodiment of the artificial fish reef of the present invention. FIG. 1 shows a basic framework 10 which is a basic constituent element of the artificial fish reef of the present invention. The basic beam member 12, the column member 14, and the beam member 16 constitute a gently sloping triangular base frame 18. The triangular base frame 18 is reinforced by appropriately providing stud members 20 and bracing members 22. The base frames 18 configured in this way are arranged with a predetermined gap therebetween, and these are connected by the basic connecting beam member and the connecting beam member 26 to form a horizontal bottom portion A, a vertical side portion B, and a gently inclined surface portion C. To form a basic framework 10, and further, the inclined surface portions between the receiving beam members 16 are assembled in a lattice shape by the receiving beam members 28 and a receiving net material 30 is stretched on the upper part thereof. In addition,
When actually constructing this type of basic framework 10, the length of the inclined surface is about 18 m, the width w is about 25 m, and the height h is about 10 m.
The size of the grid is about 4m x about 1.5m, and the diameter is about
This is a pile of stones that are made from artificially crushed 1m natural rocks 32.

However, in the present invention, the durability years of the respective constituent members of the basic framework 10 are weakened in the following order.

(1) Foundation beam member 12, foundation beam member 24 (2) Column member 14, receiving beam member 16, connecting beam member 26 (3) Beam member 20, bracing member 22 (4) Beam beam member 28 (5) ) Receiving material 30 In this way, each of the constituent materials is selected from the same material or different materials so as to have a durable life according to the order. With this structure, as shown in FIG. 3, many split quarts stones 32 are piled up on the net material 30 of the base framework 10 to form an artificial fish reef. In this way, the crushed stones piled up on the inclined surface portion of the base framework 10 and the peripheral portion thereof become a perfect environment for the growth of marine flora and fauna, and can sufficiently exert the function as an artificial fish reef. Further, in the artificial fish reef configured in this manner, the above-described constituent materials are sequentially deteriorated due to aging, and, for example, the receiving net material 30 and the receiving beam member 28 supporting the netting material are partially damaged and dropped. A part of the piled up rubble stones 32 collapses inside the basic framework 10 to change the state of the rubble stone group, a new surface of the rubble stone is exposed, and the flow of the ocean current to the fish reef changes.
In addition, due to changes over time, 20 studs and 2 braces
2. The column member 14, the beam member 16, and the connecting beam member 26 are sequentially damaged, and the state of the split stones group changes with time in the same manner as described above. As a result, the fish reef environment can always activate the ecological cycle of marine plants and animals according to the durability of each component of the basic framework 10 and maintain a suitable living environment for fish for a long period of time. it can.

When actually installing the artificial fish reef according to the present invention,
As shown in Figs. 4a to 4e, first, using the required carrier, the foundation framework 10 and the split stones 32 up to a sea area of about 40 to 100 m on the sea floor.
To carry. Next, the required number of foundation frameworks 10 are connected to the guide ropes 34, respectively, and thrown in from the sea surface.
Properly install 10 in the planned direction, then set each guide rope 34
Moored to buoy 36 [see Fig. 4a].

Then, using the guide rope 34, a splitting stone input net 38 is stretched from above the sea surface toward the upper surface of the foundation framework 10 on the sea floor [see FIG. 4B]. Then, the split stones are placed on the split stone input net 38.
By sequentially dropping 32 [see FIG. 4c], it is possible to realize a suitable pile-up of the crushed stone group on the inclined surface portion of the base framework 10 and its peripheral portion [see FIG. 4d]. After that, the artificial reef can be completed by sequentially removing the split stones input net 38, the guide rope 34, and the buoy 36 [fourth
See FIG. E].

FIG. 6 shows a unit structure which is another embodiment of the artificial fish reef of the present invention. That is, FIG. 6 shows the basic framework 40 which is the basic constituent element of the artificial fish reef of the present invention as in FIG. 1, and the basic beam member 42, the pillar member 44, as in FIG.
The beam member 46 constitutes a polygonal base frame 48. The polygonal base frame 48 is strengthened by appropriately providing bracing members 50 and the like. With the polygonal base frame 48 configured in this way as one side,
The base frame member 40 is formed by connecting the base beam member 52 and the beam members 54 to form a horizontal bottom portion D, a vertical side surface portion E, a gently inclined surface portion F, a steep inclined portion G, and an inverted inclined portion H. . Furthermore, in the base frame 40 configured in this way, when the base frame 40 is used as a single body, the gently-sloping surface portion formed by the receiving beam member 46 and the connecting beam member 54 is formed by a receiving beam member (not shown). After assembling on the lattice, a netting material (not shown) is stretched on the top of the lattice, and the split stones are piled up on it. Further, since the foundation framework 40 of the present embodiment is premised on assembling and using it in a chevron shape, the vertical side surface portion formed by the stud member 44 and the connecting beam member 54 has the same beam receiving structure as the above. Assemble the material in a grid shape and stretch the net over it. In this case, a triangular protrusion 56 is provided on the side edge of the vertical side surface adjacent to the gently inclined surface. The design dimensions of the base framework 40 of this embodiment and the durability years of each component can be set appropriately according to the above embodiment.

Next, FIGS. 7 to 10 show specific examples in which a plurality of basic frameworks 40 having the above-mentioned structure are used to assemble them into a mountain shape to construct an artificial fish reef.

FIG. 7 shows an artificial fish reef having a symmetrical mountain-shaped structure using six basic frameworks 40. In this case, the gently sloping surface portion and the horizontal bottom portion of each base framework 40 are adjacent to each other, and the split stones 32 are stacked on the inclined portion formed by the vertical side surface portions.

FIG. 8 shows an artificial fish reef with a symmetrical mountain-shaped structure using four basic frameworks 40. In this case, the steeply inclined portions of the base framework 40 located at both ends are adjacent to each other to form a stable structure.

9 and 10 show an artificial fish reef with a left-right asymmetrical mountain structure using three foundation frames 40. With such a configuration, the split stones 32 can be preferably stacked in the same manner as described above.

〔The invention's effect〕

As is apparent from the above-mentioned embodiments, according to the present invention,
The space composed of the basic framework and the crushed stones piled up on it forms an environment where marine flora and fauna can easily grow. Further, the crushed stones piled up in a slanted state will cause the bottom flow (horizontal flow) to rise along the slope, activating the fish reef environment and forming an environment in which marine flora and fauna easily grow.
Furthermore, the gaps between these crushed stones in the crushed stone group also form an environment in which marine plants can easily grow. In this way, the artificial fish reef of the present invention can set an extremely suitable fish reef environment as compared with the conventional artificial fish reef by combining the basic framework and the split stone.

On the other hand, according to the artificial fish reef of the present invention, by causing damage due to partial deterioration due to secular change in the constituent material of the foundation framework, a part of the crushed stone collapses inside the foundation framework and the piled-up state of the crushed stone. Change, the new surface of the split stone and the change of ocean current to the basic framework can promote the new growth of marine plants and animals that activated the fish reef environment. Such activation of the fish reef environment can be slowly progressed in accordance with the durability of the basic framework, so in the past, artificial fish reefs that show a gradual decrease in their effectiveness within a few years after installation are limited in their durability. The fish reef function can be effectively maintained for many years.

Therefore, the artificial fish reef according to the present invention has become a useless long piece in the seabed as in the past, but at the limit of its durability, the foundation framework collapses and the split stones are dispersed on the seabed. However, since it will be restored as a flat seabed, it will be possible to install a new artificial reef again.

Further, the artificial fish reef according to the present invention can be constructed arbitrarily from a large scale to a small scale by constructing a basic framework that can be assembled into a mountain shape, and is suitable for the environment. Can be realized.

Although the preferred embodiments of the present invention have been described above, it goes without saying that various design changes can be made without departing from the spirit of the present invention.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a basic framework constituting an artificial fish reef according to the present invention, FIG. 2 is a plan view of a main part of the basic framework shown in FIG. 1, and FIG. 3 is shown in FIG. Explanatory drawing showing the state of constructing an artificial fish reef by stacking split stones on the basic framework, FIGS. 4 a-e are explanatory views showing the installation work state of the artificial fish reef according to the present invention, and FIG. 5 is an artificial artificial reef according to the present invention. Explanatory drawing showing the secular change state of the fish reef, FIG. 6 is a perspective view showing another embodiment of the basic framework constituting the artificial fish reef according to the present invention, and FIGS. 7 to 10 are the basic framework shown in FIG. FIG. 6 is an assembly explanatory diagram showing different configuration examples in the case where the artificial fish reef is constructed by assembling the mountain shape and stacking the split stones. 10 ... Foundation frame, 12 ... Foundation beam material 14 ... Column material, 16 ... Receiving beam material 18 ... Base frame, 20 ... Strut material 22 ... Brace material, 24 ... Foundation connecting beam material 26 ... Connecting beam material, 28 ... Receiving material Beams 30 ... Recipients, 32… Split stones 34… Guide ropes, 36… Buoys 38… Split stone input nets, 40… Foundation frames 42… Foundation beams, 44… Columns 46… Beams, 48… Polygonal base frame 50 ... Brace material, 52 ... Basic connecting beam material 54 ... Connecting beam material, 56 ... Triangular protrusion A ... Horizontal bottom part, B ... Vertical side part C ... Slowly inclined surface part, D ... Horizontal bottom part E ... Vertical side surface part, F ... gently sloping surface part G ... steeply sloping part, H ... reverse sloping part

Claims (1)

[Claims] 1. A foundation comprising a horizontal bottom suitable for stationary installation on a horizontal surface, and a polygonal columnar body having a vertical side on one side edge of the bottom and a gently sloping surface formed on the upper side of the horizontal bottom. When the framework is constructed and the foundation framework is installed on the seabed in the form of a single body or a combination of a plurality of bodies, a large number of crushed pieces are crushed to a predetermined size on the inclined upper surface portion of the foundation framework or a plurality of combinations of the foundation framework. A space is formed in which marine flora and fauna are easily proliferated by stacking the stones with the basic framework and the group of stones piled up on the basic framework, and further, the inclined upper surface part is deteriorated due to aging and a part of the split stones is the basic framework. An artificial fish reef that is constructed by connecting it to a basic framework that collapses inside and changes the ocean current in a grid pattern with receiving beam members that have a relatively short service life.