JP2789535B2 - Creating artificial reefs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of forming an artificial reef capable of forming a fish reef in a breaking wave region, applicable to the restoration of a natural reef, and further capable of forming a seaweed cultivation substrate. About.

[Conventional technology]

The shallow sea area is a place for laying and feeding fish and a place where seaweeds breed, and is considered to be extremely important for organisms. Rocks such as abalone and spiny lobster are relatively shallow and inhabit large breaking waves.

Even if an artificial reef is submerged in this wave breaking area, it will not stabilize due to the effects of the waves, and will slide and fall and be launched onto the land. No artificial fish reef in the breaking wave area
Development of an inexpensive and stable installation method is awaited.

Natural rock reefs are also destroyed under the influence of waves and the like, and are gradually reduced in size, and their functions as fish reefs are deteriorating. Inhabitants of abalone and lobster, which are isone resources, are gradually decreasing.

A method for restoring the function of a natural reef as a fish reef has not been known so far, and its development is desired.

In addition, natural good places where seaweed such as rock glue can be collected are limited, and the quantity that can be collected is small,
There is a demand for easy formation of a cultivation substrate for seaweed such as rock paste.

[Problems to be solved by the invention]

An object of the present invention is to provide a method for creating an artificial reef that can easily and inexpensively and stably install a fish reef in a breaking wave area, can easily restore a natural reef, and can easily create a seaweed cultivation substrate. And

[Means for solving the problem]

In order to solve the above technical problems, the artificial rock reef creation method of the present invention installs a reinforced concrete fish reef so as to surround the natural rock reef, and then, in a gap between the natural rock reef and the reinforced concrete fish reef, The means is to inject and cast an adhesive component to make them into an integrated structure.

In the method of forming an artificial reef of the present invention, a steel fiber reinforced mortar may be further sprayed on the surface of the integrated structure to create an appearance similar to a natural reef.

As the adhesive component, for example, underwater concrete,
Epoxy resin or the like is used, and in particular, underwater concrete is preferable.

〔Example〕

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 are sectional views of artificial reefs formed by the artificial reef creation method according to the present invention, respectively.

FIG. 1 shows an example in which a natural rocky reef is used in the breaking wave area to create a fishing ground for abalone, lobster and other fish and shellfish.

When constructing an artificial reef in the breaking wave area by the method of the present invention, first, the sea area is surveyed prior to the construction, and an appropriate natural reef 1 is selected.

Next, a fish reef 2 made of reinforced concrete is manufactured so as to be adapted to the size of the natural reef 1 and is installed so as to surround the periphery of the natural reef 1.

Further, underwater concrete 3 as an adhesive component is poured into the gap between the natural reef 1 and the reinforced concrete fish reef 2, and the natural reef 1 and the reinforced concrete fish reef 2 are solidified with the underwater concrete 3 to form an integrated structure. Things. At this time, the reinforced concrete fish reef 2
Also serves as a formwork. Reinforced concrete fish reef 2
The shape of, for example, abalone, lobster, sea urchin, ishidai,
It is freely designed and manufactured according to the ecology of each organism such as red sea bream. The reinforced concrete fish reef 2 may have a hollow central portion.

Thus, according to the method of the present invention. It is possible to easily and inexpensively and stably install a fish reef in the wave breaking region, which was considered to be impossible at all, so that a suitable fishing ground can be created.

FIG. 2 shows an example of repairing a natural reef that has been destroyed and reduced by the influence of waves and the like.

When restoring a natural reef by the method of the present invention, a fish reef 2 made of reinforced concrete is manufactured so as to be adapted to the size of the natural reef 1 to be restored, and is installed so as to surround the periphery of the natural reef 1.

Next, the natural reef 1 and the reinforced concrete fish reef 2
The underwater concrete 3 as an adhesive component is poured and cast into the gap between them to form an integrated structure. At this time, a steel fiber reinforced mortar may be further sprayed on the surface of the integrated structure so as to resemble the appearance of a natural reef. This spraying treatment may be performed by directly spraying the surface of the integrated structure or by spraying the reinforced concrete fish reef 2 on land in advance.

As described above, according to the method of the present invention, it is possible to easily repair a natural rock reef that has been destroyed by a wave or the like in a place where a wave is large and has become small, restore the function as a fish reef, and restore the natural environment. be able to.

FIG. 3 shows an example of forming a seaweed cultivation substrate on which seaweed such as rock glue is propagated.

When the seaweed cultivation substrate is formed according to the present invention, the sea area is first surveyed before the formation, and an appropriate natural reef 1 is selected.

Next, a fish reef 2 made of reinforced concrete is manufactured so as to be adapted to the size of the natural reef 1 and installed so as to surround the periphery of the natural reef 1.

Further, underwater concrete 3 as an adhesive component is injected into the gap between the natural reef 1 and the reinforced concrete fish reef 2 to form an integrated structure. At this time, steel fiber reinforced mortar is further sprayed on the surface of the integrated structure for the purpose of imitating the appearance of a natural reef and facilitating the growth of seaweed. At the time of this spraying, by adding an inorganic pigment, for example, it can be made to resemble the color of abalone, turtle shell, and the like to match the natural environment.

In the method of the present invention, an integrated structure may be provided for each natural reef, or a plurality of natural reefs may be integrated to form an integrated structure as shown in FIG.

When the artificial reef of the present invention is constructed so that the surface of the integrated structure thus sprayed with the steel fiber reinforced mortar is located in the intertidal zone, the seaweed cultivation substrate 4
Is created.

As described above, according to the method of the present invention, a seaweed cultivation substrate such as rock paste can be freely and safely formed in a safe place, and can contribute to an increase in production of seaweed such as rock paste.

〔The invention's effect〕

The artificial reef creation method according to the present invention is capable of stably installing a fish reef in the breaking wave region at a low cost and without any outflow, loss, etc. of the artificial reef due to the rough waves, and being broken down and reduced in size. The natural reef can be easily restored to restore its function as a fish reef, and a seaweed cultivation substrate can be easily formed. As described above, according to the artificial reef creation method of the present invention, the habitat of fish and shellfish is newly or recreated, and the survival rate of fish and shellfish is increased and multiplied, and the destroyed natural environment is restored. be able to.

[Brief description of the drawings]

1 to 3 are cross-sectional views of an artificial reef created by the artificial reef creation method according to the present invention. 1 Natural rock reef 2 Reinforced concrete fish reef 3 Underwater concrete 4 Seaweed cultivation substrate

Claims (3)

(57) [Claims] A reinforced concrete fish reef is provided so as to surround the periphery of a natural reef, and then an adhesive component is injected into a gap between the natural rock reef and the reinforced concrete fish reef to form an integrated structure. A method of creating an artificial reef, characterized by: 2. A method for creating an artificial reef according to claim 1, wherein a steel fiber reinforced mortar is further sprayed on a surface of said integrated structure. 3. The method of claim 1, wherein underwater concrete is used as the adhesive component.