KR101015059B1 - Concrete wall type artificial reef - Google Patents

Abstract

PURPOSE: A wall type concrete fish reef is provided, which can protect aquatic living creature more safely by regularly and harmoniously arranging spaces. CONSTITUTION: A wall type concrete fish reef comprises: fours inner walls(1) linked and formed into the cross shape; a wall type fish reef which is formed in order to have the Srivatsalksana shape by the exterior wall(2) being bent at 90 degrees at each inner wall outer end; and an opening(3) which is formed in the inner wall and exterior wall forming the wall type fish reef and makes aquatic living creature and seawater come in and out.

Description

Concrete wall type artificial reef}

The present invention forms a swastika-shaped wall-shaped reef by an inner wall connected in a cross shape and an outer wall bent at an angle of 90 degrees from the inner wall in a predetermined direction. Correspondingly forming openings on the wall of the wall, a single reef with a relatively simple structure can express a three-dimensional feeling sufficient for the visual attraction of the fish, and induces a variety of seawater flow to create a good growth environment, negative Labyrinth-type passages can be arranged in a regular and harmonious manner to harmonize the space and the quantitative space to collect various kinds of aquatic life, while protecting the aquatic life more securely from indiscriminate capture by fishing, netting, or catching fish. To a walled concrete reef that has been provided.

In general, artificial reefs are artificial structures installed in the sea to provide habitats for aquatic life such as various fish, shellfish, and algae. B. It is used for the purpose of fostering fish stocks by laying nests and hiding places for shellfish.

Such artificial reefs can be roughly divided into submerged type for installing the structure on the seabed and buoy type reefs for mooring the structure in the sea. Several types of reefs have been used, including prefabricated reefs with a uniform back, but waste reefs and waste car reefs. However, the use of waste resources in relation to marine environmental problems is on the decline.

Among the various artificial reefs described above, the most widely used as a submerged reef is a typical example of a rectangular artificial reef formed by using a concrete and reinforcing barbed frame, and the rectangular artificial reefs are loaded on a barge. They were then transported to the waters, and submerged artificial reefs on the seabed using cranes installed on the barge to provide spawning and hiding places for fish and shellfish.

However, the conventional rectangular artificial reefs have a very simple shape, and various shellfish and seaweeds easily adhere to the surface of the reefs at the stage of seeding, making it difficult to grow into a large number of fish. There is very little space for the young clam to hide from the eyes of natural enemies, and if the direct sunlight shines through the water, these hides are easily exposed, creating an environment in which fry and pulp can live more safely. There was a problem that could not be created.

In addition, since a single reef can hardly expect the three-dimensional and effective reef functions necessary for the visual attraction of fish, a very large number of square artificial reefs should be stacked along the sea floor. In addition, much of the time and expense of the facility of the eocho, there was a problem that the facility work of the eocho very difficult.

In addition, by submerging the conventional rectangular artificial reefs in the sea, even if the primary formation of the shelter and spawning ground of the fry or chipping, the actual means of hiding of the fry or chipping and the various seaweeds to be fed are very slow and the population As it becomes very poor, there is a problem that it is difficult to achieve the increase of fish resources even after a long time after the settlement of artificial reefs, which makes no contribution to the profit business of coastal sea fishing industry or coastal ranching business. It is true.

On the other hand, as another submerged reef, it is possible to include a steel reef made of a multi-layer frame structure having a height of about 10m around the steel frame, such a steel reef is a smooth steel frame As it is manufactured with, the structure is not suitable for the swelling and growth of algae or algae than the rectangular artificial reef made of concrete material, due to which the reef itself has a complicated structure, the actual reef function is difficult to properly manifest there was.

In addition, in the case of forced reefs, there is a problem that the manufacturing cost of artificial reefs is expensive because it becomes a large frame structure in which the steel frame is assembled into a complicated shape, and the fixability to grow on the bottom of the sea as the height of the artificial reefs is about 10 m Fishes and protective purposes fishes and migratory fishes that swim in the middle and upper layers could be distributed evenly along the height direction, but simple frame structure makes it difficult to expect more efficient and practical fish weaving. When considering the cost of the facility and the function of the fish at the same time there was a very uneconomic problem.

On the other hand, in the case of artificial reefs, various kinds of fishes, such as shellfishes and seaweeds and fishes, are being developed according to the type of aquatic life. It was only developed for the purpose of fostering a single species, and the development of artificial reefs to achieve excellent ecological colonies and coastal ranches is very low due to the effective abundance of various aquatic organisms centering on artificial reefs.

The present invention has been made to solve the conventional problems as described above, the wall-shaped concrete reef of the present invention, the inner wall connected in a cross shape (十) shape and the angle of 90 degrees along a predetermined direction from the inner wall By forming a swastika-shaped wall-shaped reef by the outer wall bent into a shape, and by forming openings on the outer wall and the inner wall correspondingly, the visual attracting function of the fish with a single simple fish with a relatively simple structure The three-dimensional feeling necessary for the expression is sufficiently expressed, and the flow of seawater through the reefs is induced in various forms to create a better growth environment, and the negative space by the inner edge and the quantitative effect by the outer edge By allowing spaces to be arranged regularly and harmoniously, they prefer aquatic and bright areas that prefer narrow, dark places. And that such aquatic organisms is wijip same time evenly distributed into each wall of the first aspect.

In addition, the present invention by installing the algae attachment plate on the upper side of each of the inner wall and the corresponding outer wall, while installing a perforated pipe between each of the inner wall and the corresponding outer wall, it is natural By securing the maximum surface area necessary for the fixation of the cultivation of the cultivated working line with algae or algae germinated spores, a large number of seaweeds can be grown on the reefs. At the same time, the perforated tube provides a function of strengthening the strength of the wall, and also provides enough space for stealth and larvae to hide and grow from the eyes of natural enemies. The spawning grounds, feeding grounds and growing spaces of the larvae and larvae for the colonization It is a 2nd technical subject to make it possible to arrange | position.

On the other hand, when each wall-like reef is installed on the sea floor at regular intervals, the fishing area itself is formed by a complex maze passage by the inner wall and the outer wall which form a swastika shape. It also helps to protect aquatic organisms more securely from indiscriminate capture by nets or traps, and thus various kinds of aquatic organisms including shellfish and fish from the seaweeds that are the basis of the aquatic colony are confined to the facility area of the reefs. In addition, by ensuring that these aquatic organisms are safely protected and grown from indiscriminate capture, the coastal waters with artificial reefs can be formed into excellent fishing grounds in a very short period of time. Can contribute substantially to the coastal ranching project. And that in the third aspect.

The present invention as a means for solving the above technical problem, by the four inner walls are formed in the form of a crisscross, and by the outer wall bent at a 90 degree angle in a predetermined direction at the outer end of each inner wall A wall-shaped reef having a swastika shape is provided, and an inner wall and an outer wall of the wall-shaped reef are formed with openings that become flow paths of seawater and aquatic organisms.

In addition, the algae attachment plate is installed across the upper side of the outer wall of the position facing the inner wall from the upper side of each of the inner wall is characterized in that the installation, the opening is formed in the lower end of the inner wall and the outer wall to provide a foot bridge A plurality of the corresponding openings are formed along the height direction of each wall, including a lower opening, wherein the openings formed along the height direction of each wall include a circular opening, between an inner wall and an outer wall at a position facing the wall. It is characterized in that the hole pipe connecting the circular opening is installed.

According to the present invention as described above, a single three-dimensional reef is required to express a sufficient three-dimensional feeling required for the visual attraction function of the fish, while the flow of seawater through the reefs by the flow interference of the seawater provided by each wall is very diverse It is effective to create an excellent growth environment required for aquatic communities, and to prefer a narrow and dark negative space corresponding to the connection between the inner wall and the bend of the outer wall and the inner edge of the opening. The abundance of aquatic organisms, even a single herbaceous organism, is distributed evenly between each wall by aquatic organisms that favor living organisms and bright and exposed quantitative spaces corresponding to the upper side of the wall and the outer side of the outer wall. This has the possible effect, and to achieve this function through a simple wall arrangement structure It has the effect of providing a more economical and practical stand eocho.

In addition, when the lower opening, the bird attachment plate and the perforated pipe are applied, the inner side of the lower opening and the lower side of the bird attachment plate and the inside of the perforated pipe are added to the negative space, and the upper side of the bird attachment plate is added to the quantitative space. On the other hand, by the part where the algae attachment plate and the perforated pipe are connected to the wall, a narrow edge space suitable for the shelling and growth of shellfish is also added, thus enabling more efficient aquatic living, and reinforcing the wall by the perforated pipe. Along with its function, sufficient space is required for the attachment of algae and the hiding and growth of fry and tooth plaques. It has the effect of making the arrangement.

In addition, the part of the poncho bridge provided by the lower opening is penetrated through the seabed ground, thereby enabling the facility of a more robust fish reef, as well as openings formed corresponding to each wall including the lower opening to smoothly communicate the seawater and fish. By providing the flow path necessary for the movement of the reefs, the reefs installed on the sea floor are prevented from being overturned by strong algae resistance, so that the height of the reefs is also secured to the required level. There is an effect that it is possible to counterfeit various species, from the main fishes inhabiting to the fishes, including the protection-purpose fish, to the middle-sized inhabitants.

In particular, when each wall-shaped reef is installed on the sea floor at regular intervals, the facility area of the reef forms a complicated labyrinth-type passage by the inner wall and the outer wall which form a swastika shape. Various kinds of aquatic organisms, including various shellfish and fishes, from the underlying seaweeds are confined to the plant area of the reefs, while these aquatic organisms are effectively protected and grown from indiscriminate capture. By making the coastal waters equipped with artificial reefs with excellent fishing grounds within a very short period of time, it has a very useful effect such as more efficient promotion of the profit business of coastal fishing villages such as sea fishing and coastal ranching business.

1 is a perspective view of a wall type reef according to a first embodiment of the present invention.
2A and 2B are perspective views of a wall type reef in accordance with a second embodiment of the present invention.
3 is a plan cross-sectional view of the reefs shown in FIGS. 1 and 2;
4 is a perspective view of a wall type reef according to a third embodiment of the present invention.
5 is a perspective view of a wall type reef according to a fourth embodiment of the present invention.
6 is a perspective view of a wall type reef according to a fifth embodiment of the present invention;
FIG. 7 is a plan sectional view of the fish reef shown in FIGS. 5 and 6;
8 is a perspective view of a wall type reef according to a sixth embodiment of the present invention;
9 is a perspective view of a wall type reef according to a seventh embodiment of the present invention.
10 is a plan view showing a schematic facility state of the wall-shaped reefs according to the present invention.

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

As shown in FIG. 1, the wall-shaped reef 10 according to the first embodiment of the present invention has four inner walls 1 connected to each other in a cross shape, and the respective inner walls 1. ) Has a swastika shape by the outer wall 2 bent at an angle of 90 degrees along a predetermined direction at the outer end.

In addition, an opening 3 is formed in the inner wall 1 and the outer wall 2 constituting the wall-shaped reef 10 as a flow passage for communication of seawater and movement of aquatic organisms. Although one rectangular opening 3 is shown for each wall 1 and 2, the shape and number of the openings 3 can be arbitrarily adjusted.

In addition, the openings 3 may be formed in the same shape in each of the walls 1 and 2, and the openings 3 in different shapes may be formed in each of the walls 1 and 2. Considering the design and the arrangement of reinforcing bars and the fabrication of the reefs 10, the appearance and the three-dimensional appearance of the reefs 10 more prominently, and the seawater to communicate smoothly, Is more preferred.

In addition, a lower end cutout 4 having a substantially trapezoidal shape is formed at the lower ends of the inner wall 1 and the outer wall 2, while the inner wall 1 and the outer wall are formed by the lower cutout 4. Reefs 5 are provided for installation of the walled reef 10 over both lower ends of 2).

When the reef leg 5 is equipped with the wall-shaped reef 10 of the present invention on the sea bottom, each reef leg 5 penetrates into the undersea ground, and, of course, enables a robust facility of the reef 10. By providing a narrow passage by the lower opening 4 between the sea bottom and the bottom of the reef 10, it provides an advantageous advantage in terms of seawater communication and aquatic life.

As described above, in the wall-shaped reef 10 according to the present invention, the inner wall 1 and the outer wall 2 having a predetermined height are arranged in a swastika shape, and each wall 1 and 2 are disposed. The rectangular opening 3 is provided at the inside, so that the three-dimensional feeling necessary for the visual attraction function of the fish can be sufficiently expressed, and through the flow interference of the seawater by the respective walls 1 and 2, It is possible to induce the flow of seawater generated in the more various forms.

As described above, the flow interference of seawater by each wall (1) (2) and the resulting seawater flow within the reef (10) may appear in a variety of complex forms, but briefly summarized as follows. .

First, when the flow of seawater hits one side of the wall-shaped reef 10, a part of the flow is space and opening 3 between the inner wall 1 and the outer wall 2 opened in a "c" shape. Induced into the inside of the reef (10), the remaining flow hits the outer wall (2) is to turn the reef (10).

As described above, part of the flow of seawater guided into the inside of the reef 10 also passes through the opening 3 and flows in a straight direction, and the rest of the flow hits the inner wall 1 so as to turn back. Likewise, the flow of seawater turning the reef 10 along the outer wall 2 is likewise partly led to the inside of the reef 10 along the outer wall 2, while the rest of the flow is the reef 10. It is directed to the flow in the straight direction via).

Due to the above-described method, the straight stream, the swirling flow and the reverse flow of the seawater coexist in the wall-shaped reef 10, and the various and complicated seawater flows are supplied with oxygen. Not only does it promote the discharge of foreign substances, but also consider that most aquatic organisms piggyback on the flow of seawater, thus creating a very good aquatic environment.

In particular, in the wall-shaped reef 10 of the present invention, since the inner wall 1 and the outer wall 2 form a swastika shape, a negative space which is a narrow and dark space and a quantitative space which is a bright and exposed space are one. A regular and harmonious arrangement is made on the reef 10, which allows the aquatic organisms that prefer negative spaces and the aquatic organisms that prefer quantitative spaces to be evenly distributed on each wall (1) (2). will be.

In the wall-shaped reef 10 according to the present invention, the portion corresponding to the negative space is connected between the inner wall 1 and the inside of the bent portion of the outer wall 2 and the inner edge and lower opening of the opening 3. It becomes the inner space of 4), and the part corresponding to a quantitative space becomes the upper surface of the inner wall 1 and the outer wall 3, and the outer surface of the outer wall 2. As shown in FIG.

While ensuring a sufficient visual inducement effect due to the three-dimensional feeling expressed from the eocho (10) as described above, to induce a variety of seawater flow through the eocho (10) to create an excellent growth environment, harmony of yin and yang space Through a variety of aquatic organisms can be gathered (complex: crowded), and to achieve this function through a simple wall (1) (2) arrangement structure can provide a more economical and practical fishery. .

2A and 2B show a wall-shaped reef 10 according to a second embodiment of the present invention, which extends from the upper side of each inner wall 1 to the upper side of the outer wall 2 at a position opposite thereto. The algae attachment plate 6 is installed to be connected horizontally, and the rest of the configuration is the same as the first embodiment described above.

The algae attachment plate 6 is to be formed integrally with each of the walls (1) (2) in the process of placing and curing concrete for the manufacture of the wall-shaped reef (10), while the upper surface of the reef (10) The algae attachment plate 6 and the wall (1) are formed so that both ends of the algae attachment plate 6 are embedded into the upper side of the walls 1 and 2 without protruding from the algae attachment plate 6. The upper surface of the (2) to make the same plane is most preferable in terms of ensuring the durability of the bird attachment plate (6).

If necessary, by placing the reinforcing bar of the "a" shape along the formwork at the connection part of each wall (1) (2) and the bird attachment plate (6), the concrete pouring for the manufacture of the wall-shaped reef (10) The reinforcing bar may be embedded along the connection part of the bird attachment plate 6 and the wall 1 and 2, and additionally, the reinforcing bar may be embedded in the inside of the bird attachment plate 6. Of course.

However, it is also possible to assemble the algae attaching plate 6 separately from the upper surface of the wall type reef 10 using steel or other material such as polycone (polyvinyl concrete), and install the algae attaching plate 6. The number can also be adjusted within the range of 1 to 3 in consideration of the width of each wall (1) (2), the working string along the surface of the algae attachment plate 6 ( Or an installation groove for fixing the rope).

The material that can be optimally applied to the present invention as the algae attachment plate 6 is a porous concrete plate (6a), the porous concrete is added to the crushed aggregate with water and admixture to the membrane of the mixed solution on the surface of the crushed aggregate It is a known material that has a large amount of pores in the interior of the composition by forming it, and then additionally adding cement, mixing it, and then pouring it into a mold.

The porous concrete is used to infiltrate moisture and large amounts of nutrients or adsorb and remove various contaminants by using pores provided in the composition itself, as well as to easily settle down the roots of various plants as well as on land. Since it can be made, it is a material currently widely applied to a raft block, an artificial reef, etc. in recent years.

However, the porous concrete has a disadvantage in that it is difficult to apply the reinforcing bars due to the fear of corrosion due to the penetration of seawater, so as shown in Figure 2b along the outer periphery of the porous concrete plate (6a) reinforcement by general concrete It is most preferable to form a frame so that the reinforcing frame portion is embedded in the upper end of the wall 1, 2, and is porous in all four algae attachment plates 6 installed in the wall-shaped reef 10. The concrete plate 6a may be applied, and the porous concrete plate 6a may be applied only to a part of the algae attachment plate 6.

When the bird attachment plate 6 is additionally applied as described above, the lower side and the upper side of the bird attachment plate 6 provide additional negative and quantitative spaces, and the bird attachment plate 6 and the wall 1 (2) provides additional narrow edge space suitable for shelling and growth, while allowing sufficient shadows to be cast in the inner space of the reefs 10, making the aquatic more efficient. The exile of the creature becomes possible.

In addition, the algae attached plate (6) can secure a wider surface to which the various algae are attached and grow, and if necessary, each algae attached plate (6) germinated spores cultured Since the rope may be wound, it is possible to prepare a foundation for forming a colony of aquatic organisms by allowing a large number of seaweeds to serve as spawning grounds and feeding grounds of various aquatic organisms.

In particular, when the porous concrete plate (6a) is applied to the algae attachment plate (6), it is possible to provide an optimal algae structure that can be quickly grown by various seaweeds attached more easily, and thus, Figure 2b The wall-shaped reef 10 shown in may be most suitably used as a shellfish algae.

FIG. 3 is a cross-sectional plan view of the wall-shaped reef 10 shown in FIGS. 1 and 2 with respect to the opening 3, with the end of the outer wall 2 slightly lowered relative to the inner wall 1. Inwardly, the end of the outer wall 2 may extend in line with the inner wall 1, or the end of the outer wall 2 may extend to the position beyond the inner wall 1. .

4 shows a wall-shaped reef 10 according to a third embodiment of the present invention, the height of which is somewhat higher than that of the wall-shaped reef 10 according to the first and second embodiments. The wall-shaped reef 10 according to the first and second embodiments has a width and height of about 1: 0.5, and the wall-shaped reef 10 according to the third embodiment has a width and a height. The ratio is about 1: 1 to 1.5.

In addition, since the inner wall 1 and the outer wall 2 are formed in a rectangular shape, the wall-shaped reef 10 according to the third embodiment is formed along the height direction of each wall 1, 2. Preferably, about two openings 3 are formed correspondingly, one opening 3 located on the upper side in the figure is formed in a square shape, and the other opening 3a located on the lower side is circular. Consists of

However, even in the wall-shaped reef 10 according to the third embodiment, the number, shape and arrangement of the openings 3 can be changed arbitrarily, and the main purpose of forming the circular opening 3a is the main purpose. By connecting each circular opening 3a to the perforated tube 7 as in the fourth embodiment shown in FIG. 5, the wall-shaped reef 10 according to the present invention has a better structural strength, To achieve a more reasonable structure.

In the case of the perforated pipe (7) is made of a separate part from the wall-shaped reef (10) using concrete, and after the production of the wall-shaped reef (10) is completed, each of the inner wall (1) and facing this It is most preferable to apply a method of inserting and fixing the perforated tube 7 by fitting along the circular opening 3a formed corresponding to the outer wall 2 at the position.

However, if necessary, the perforated pipes 7 are formed together with the walls 1 and 2 at the time of pouring and curing concrete for the manufacture of the wall type reef 10 as with the algae attachment plate 6. Alternatively, the hole tube 7 may be formed of other materials such as steel or polycone (polyvinyl concrete), and the hole formed through the hole tube 7 may have a pomace less than 10 cm. A circular hole having a small diameter of is preferable.

When the perforated pipe 7 is installed in the above manner, the wall (1) (2) is provided with an optimal space in which the fry or the tooth can hide and grow away from the eye of the natural enemy along with the strength reinforcement of the wall (1) (2) ( 2) can be provided between the inner space and the outer surface of the perforated pipe (7) provides additional negative and quantitative space, while the part where the perforated pipe (7) is connected to the wall (1) (2) is also shellfish It is a narrow corner space suitable for lubrication and growth.

6 shows a wall-shaped reef 10 according to a fifth embodiment of the present invention, which corresponds to an optimal embodiment of the present invention to which both the algae attachment plate 6 and the perforated pipe 7 are applied, and FIG. The wall-shaped reef 10 shown in Figs. 5 and 6 is cut in the center of the opening 3, so that the arrangement state of the perforated pipe 7 is more clearly shown.

8 shows a wall-shaped reef 10 according to a sixth embodiment of the present invention, in which the width and height of the reef 10 have a ratio of about 1: 2, and the inner wall 1 and The openings 3 formed in the outer wall 2 are also formed correspondingly to the height of each of the walls 1 and 2, and two rectangular openings 3 in the drawing are formed in the walls 1 and 2. It is formed on the upper and lower sides of the, respectively, and the circular opening 3a is formed therebetween.

The reason why the height of the wall-shaped reef 10 can be increased to the required level as described above is that the part of the reef foot 5 provided by the lower opening 4 is penetrated through the seabed ground. In addition to enabling a robust installation, the openings (3) (3a) formed to correspond to each of the walls (1) (2) to facilitate the communication of the sea water, the wall-shaped reef (10) installed on the sea bottom is strong This is because the phenomenon of conduction caused by the algae resistance can be prevented in advance.

As described above, the height of the facility of the wall-shaped reef 10 can also be sufficiently secured to the required level, and the protection required for protection due to indiscriminate overfishing and the main fish that lives mainly on the bottom layer or the solid body Various types of fish can be stowed from the sea bottom to the upper end of the wall-shaped reef 10, up to the target fish and the migratory fish swimming in the middle layer.

FIG. 9 shows a seventh embodiment in which the algae attachment plate 6 and the perforated pipe 7 are additionally installed in the wall-shaped reef 10 shown in FIG. 8, which implies all the contents described above. Correspondingly, shown in Figure 10 is a wall-shaped reef 10 according to the present invention shows a state installed at regular intervals along the sea bottom.

As can be seen in FIG. 10, when the wall-shaped reef 10 of the present invention is installed along the sea bottom at regular intervals, the inner wall 1 and the outer wall 2 having a swastika shape are formed. As a result, the facility area itself of the reef 10 forms a complicated labyrinth-type passage, whereby various kinds of aquatic organisms including various shellfish and fish from the seaweeds, which are the basis of the aquatic community, to the facility area of the reef 10. While being exiled, these exalted aquatic organisms can be more safely protected and grown from indiscriminate capture using fishing, nets, or catches.

Therefore, by making the coastal sea area in which the wall-shaped reef 10 of the present invention is installed as an excellent fishing ground within a very fast period, it can not only substantially contribute to the profit business of the fishing village or coastal ranching business, such as sea fishing, It will also contribute greatly to increasing and protecting fisheries resources in the coastal waters, which are being reduced more and more by promoting these projects more efficiently and actively.

Finally, in the above description based on the drawings, four inner walls 1 and two outer walls 2 have a wall-shaped reef 10 of the present invention having a swastika shape. However, the three inner walls 1 are disposed at an angle of 120 degrees, or the five to six inner walls 1 are disposed at an angle of 60 degrees to 70 degrees, and then external to each inner wall 1. The wall type reef 10 may be manufactured by connecting the wall 2.

As described above, the technical deformation of the degree of simply reducing or increasing the number of the internal wall 1 and the external wall 2 and the technical modification of the degree of changing the shape and arrangement of the opening 3 are the present invention. It will be apparent to those skilled in the art having ordinary skill in the art as well as naturally included within the scope of the technical idea to be pursued.

DESCRIPTION OF SYMBOLS 1 Inner wall 2 Outer wall 3 Opening part
3a: circular opening portion 4: lower opening portion 5: the foot bridge
6: algae attachment plate 6a: porous concrete plate 7: perforated pipe
10: wall-shaped reef

Claims (4)

In artificial reefs made of concrete submerged on the sea floor,
The artificial reefs have four inner walls 1 connected to each other in the form of a cross, and an outer wall 2 bent at an angle of 90 degrees along a predetermined direction from the outer end of each inner wall 1. ) Becomes a wall-shaped reef 10 having a swastika shape,
Wall concrete reef, characterized in that the inner wall (1) and the outer wall (2) constituting the wall type reef (10) is formed with an opening (3) for the flow passage of seawater and aquatic life. The wall-shaped concrete according to claim 1, characterized in that the tide attachment plate (6) is horizontally connected from the upper surface of each inner wall (1) to the upper surface of the outer wall (2) at a position opposite thereto. Echo. According to claim 1 or 2, A plurality of openings 3 are formed correspondingly along the height direction of the inner wall (1) and the outer wall (2),
The opening 3 has a wall-shaped concrete reef, characterized in that it comprises a lower opening (4) formed at the lower end of the inner wall (1) and the outer wall (2) to provide the upper leg (5). According to claim 3, wherein the opening (3) formed along the height direction of the inner wall (1) and the outer wall (2) comprises a circular opening (3a),
Wall-shaped concrete reefs, characterized in that between the inner wall (1) and the outer wall (2) of the position facing the hollow hole (7) connecting the circular opening (3a) is installed horizontally.

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