JPS6036249B2 - Artificial reef manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an artificial reef made of concrete.

In general, a fish reef is an artificial reef that targets general fish, and a rocky shore is an artificial reef that targets spiny lobsters, turban shells, etc. that live on rocky reefs in shallow waters, but in this specification, for convenience, the term fish reef includes construction equipment. do.

Conventionally, when manufacturing concrete artificial fish reefs, a well-located site was chosen near the site of submersion, a solid frame was formed on-site with reinforcing steel, and a wooden reef chamber form was used as the internal space. After connecting to the reinforcement and surrounding the park with weir boards on the outside, concrete is poured. As weir plates, metal forms made of steel plates are generally used to improve dimensional accuracy and construction efficiency. However, transporting and storing this metal form to the site, processing and assembling the reinforcing bars on site, manufacturing the reef chamber formwork and connecting it to the reinforcement, assembling the metal form, applying concrete release oil, and pouring the concrete. , disassembly and maintenance of metal foam after curing,
It takes a lot of effort, money, and days to go through processes such as removing the reef chamber formwork. Furthermore, the shape of the woodcutter's room is designed to suit the ecology of fish and shellfish, that is, for feeding, as can be seen in Utility Application No. 56-121078 (publication of Utility Model Publication No. 58-54934), which was already devised by the inventor of the present application. It is complex, with a suitable reef entry area, a wave-dissipating area to enhance the wave-dissipating effect of Gekiro, and a shelter to protect against waves and natural enemies. Therefore, it was difficult to remove the formwork after concrete was poured and cured. Here, the object of the present invention is to solve the above-mentioned drawbacks, to replace the metal form with a net formwork that has the function of reinforcing the key body, and to leave it on the inner surface of the concrete, and to make the outer surface rough and to form seaweeds. This is an artificial fish reef that promotes the appearance and growth of the reef, and also allows the complicated shape of the reef chamber to be easily molded using a water-soluble mold, and after curing and hardening of the concrete, the reef chamber part is decomposed by water to form a hollow part. The purpose is to provide a manufacturing method, the gist of which is to manufacture an artificial fish reef consisting of concrete fly bodies that is submerged in the sea to collect, settle, and multiply flies on seafood such as spiny lobster and plank fish. , the process of molding most of the surrounding area with net molds, the process of fixing the mold in the shape of a reef chamber that will be a habitat for fish and shellfish and decomposing in water within the net formwork, and the pouring of concrete into the formwork. This method is characterized in that, after the concrete has hardened, the mold is decomposed by water to form a reef chamber.

The present invention will be explained in detail based on illustrated embodiments.

Figures 1 and 2 show, for example, the framework 1 of the Iseyebi Reef after completion, which is made of concrete, and the entrance at the front of the reef is part of the framework 1.
These are the reef entry parts 4 and 5 of the spiny lobster reef chamber 2 and the moray eel reef chamber 3 provided therein, and are arranged in multiple rows and multiple stages.

At the top of the front part, an eaves 6 having a predetermined thickness and overhang length is formed within the same body 1, and the reef part 4,
It is designed to block direct sunlight from entering 5. On the upper surface of the frame 1, hanging fittings 7 are provided at the four corners for sinking the structure into the seabed using a crane or the like. The outer surface, except for the bottom, has a rough finish, which is effective for the rooting and growth of seaweeds. The reason why moray eel reef chamber 3 was established on the spiny lobster reef is that moray eel, which is the natural enemy of octopuses, has a habit of coexisting with spiny lobsters, and they enter the moray eel reef chamber 3, which is an auxiliary reef chamber, to carry out feeding activities for their grandchildren. This is because it can prevent feeding damage caused by octopuses, which are the natural enemy of spiny lobsters.

Experiments conducted in waters where many octopuses live have shown that the number of spiny lobsters on reefs inhabited by moray eels is stable and the reef entry rate is good. Even on natural reefs, areas where moray eels inhabit large numbers of spiny lobsters, and their numbers are stable throughout the year. In addition, as shown in Fig. 2, the spiny lobster reef chamber 2 has a wave-dissipating section 9 at the back of the reef entry section 4, an evacuation row 0 extending downward from the reef entry section 4, and a resting room 11 and a lobster reef chamber 11 at the back. There is a shrimp fishing row 2.

In addition, remove the cap 13 of the catch row 2 and open the catch port 12.
By attaching a silk bag to the net and pushing in the young shrimp using built-in fishing gear from the reef entry section 4, the young shrimp and young shrimp can be netted into the silk bag and bare seedlings can be produced. Figure 3 shows a mold 15 for forming the spiny lobster reef chamber 2, which is made by kneading sawdust, wood chips, wood wool, etc. with a water-soluble glue, such as complex acid vinyl adhesive.
This is an external view of the reef inlet section 4, wave dissipating section 9, evacuation row 0, and rest room 11, which are integrated, and a synthetic resin pipe with a cap 13 is connected as the juvenile shrimp fishing row 2. ing.

FIG. 4 shows the external appearance of a mold 16 for the moray eel reef chamber 3, which is manufactured in the same manner as the mold 15 and is composed of a reef entry section 5 and a habitat chamber 17. In order to manufacture the molds 15 and 16 for the spiny lobster reef chamber 2 and the moray eel reef chamber 3, the reef chamber 2 with the internal dimensions must be
, 3, the raw material is pressurized and
The mixture is injected and heated slightly to accelerate the reaction, and once the reaction is complete, the mold is dismantled.

Assembling the mold, pouring, completing the reaction, and dismantling the mold are sequentially repeated to produce the required number of molds 15 and 16 in the factory. Note that it is preferable that the surfaces of the molds 15 and 16 be coated with waterproof paint. Also, this type 15, 16
may be manufactured by using plywood that easily decomposes in water, for example, lauan plywood of class 3 water resistance, and joining them with an adhesive that easily dissolves in water. In this case, supports may be provided inside as necessary to withstand the concrete filling pressure. FIG. 5 shows the manufacturing process of the key body 1.

At the manufacturing site, as a first step, a net frame 20 as shown in FIG. 6, for example, cut into predetermined dimensions by factory processing, is used to form a predetermined frame by connecting the intersection points with bolts and nuts. The net frame 20 is a channel-shaped steel plate or an angle-shaped steel plate, and rectangular protrusions 21 are formed outwardly on the side surface thereof at predetermined intervals at right angles to the longitudinal direction by press punching. The part of the frame 1 corresponding to the ground surface is made substantially flat, a curing sheet or a curing board is laid, and the frame of the net frame 20 is arranged. As a second step, reinforcing bars made of round steel of different diameters are arranged inside the framework of the net frame 20.

The order of the vinegar reinforcement is to place the smoother on the curing sheet according to the specified dimensions, arrange and tighten the lowest X-direction reinforcing bars 22 and Y-direction reinforcing bars 23, and then raise the Z-direction reinforcing bars 24 and temporarily fasten them.
The mold 16 of the moray eel reef chamber 3 is placed in a predetermined position, and is tightly attached using existing reinforcements nearby. It is necessary to secure the mold 16 sufficiently to prevent it from floating when concrete is poured, which will be described later. Next, from the bottom, the second row of X
Directional reinforcing bars 22 and Y-directional reinforcing bars 23 are arranged and connected to the existing Z-directional reinforcing bars 24. Next, type 15 of spiny lobster reef chamber 2
Place it in a predetermined position and tighten it using the existing reinforcement nearby. By repeating this, the desired placement of the molds 15 and 16 and reinforcement except for the top row are completed. Further, although the hanging fittings 7 are not shown, the reinforcing bars are bent into a V-shape and tightly attached to the existing reinforcing bars. As a third step, a net 25 made of wire mesh, such as the one shown in FIG. 7, is attached from the outside of the net frame 20 to the outer peripheral side surface.

This net 25 is made by punching out a metal plate, and has large and small reinforcing ribs 26 arranged at predetermined positions. The net 25 is cut to a predetermined size by factory processing, and this is attached to the protrusion 21 of the net frame 20 with ribs 2.
6, and the net 25 is stretched using a separator (not shown). It is necessary to sufficiently reinforce the net 25 using separators so as not to cause deformation during concrete pouring. Then,
The net frame 20 for the top and eaves 6 is framed and reinforced. These net frame 20 and net 25 are generally commercially available as net forms and are easily available. As the fourth step, concrete is poured, but since the net 25 is used, the inside can be seen through the gap, and the surroundings of the molds 15 and 16,
Wave-dissipating section 9 of Ise-ebi Reef 2, which is particularly difficult to fill with concrete
The concrete filling situation between the building and the rest room 11 is ascertained, and if necessary, it is possible to fill the area with concrete, etc.

Further, if the concrete has a hardness below the slump 15c, the cement mortar containing pongee aggregate overflowing from the voids of the net 25 will not flow and fall, but will remain stationary in the overflowing state from the net 25. Therefore, if the surface of the concrete 27 is lightened with a brush or the like while checking the degree of water withdrawal, unevenness will inevitably be formed on the outer surface, and the net frame 20 and the net 25 will also maintain the required cover thickness of the concrete 27. Is possible. When the concrete filling reaches approximately the top surface, a net 25 is attached to the top surface, and concrete is poured to a required thickness to manufacture the eaves 6 and the ceiling. At this time, the upper surface is also lightly smoothed with a brush to form a phase surface. Also, as a work procedure, molds 16 and 15
It is practical to repeat the application of the net 25 and the pouring of the concrete 27 every time one layer of the concrete is laminated.

Furthermore, for convenience of explanation, the upper part of the frame 1 was manufactured with the upper part facing upward as shown in FIG.
It is also easy to fill the spaces between 16 and 16 with concrete. If the frame 1 manufactured in this way is submerged in the sea, the molds 15, 1
6 is broken down and fragmented relatively quickly due to ocean current action and the movement of fish, and flows out from the reef entry parts 4 and 5 to the reef chambers 2 and 3.
is formed naturally.

In addition, after completion of the frame 1, the molds 15 and 16 can be melted by injecting high-pressure water on land. In this way, as shown in FIG. 1, the body 1 has a spiny lobster reef 2 and a moray eel reef chamber 3 formed therein according to the molds 15 and 16, and can be used as a fish reef for seafood.

Furthermore, even if all of the decomposed molds 15 and 16 are not released, they will hardly have any adverse effect on fish and shellfish in the reef. Although spiny lobster reefs have been described in the examples, it goes without saying that reefs of other fish and shellfish species can also be manufactured using similar steps. As explained above, the method for manufacturing an artificial fishing reef according to the present invention does not use a weir plate such as a metal foam.
You can save costs for transportation, storage, handling, etc., and
Due to the synergistic effect of the net frame and the net, the strength can be significantly increased compared to the strength of reinforcing bars alone, and the assembly of the net frame does not require any special skills.

Furthermore, even reef chambers with complicated shapes can be easily manufactured to have homogeneous and uniform dimensions. The rough finish on the outer surface that promotes the rooting of seaweeds can also be created using conventional concrete chisels with little effort required compared to the vine method. A rough finish is required for the outer surface of a fish reef.
It is suitable for the attachment and growth of seaweeds that are essential for fish reefs, and it has already been proven that rooting is effective for Geki Musume. In this way, there are great advantages in producing artificial fishing reefs, such as cost savings, shortened processes, reliability, and ease of construction.

[Brief explanation of the drawing]

The drawings show an embodiment of the artificial reef manufacturing method according to the present invention, in which FIG. 1 is a perspective view of a spiny lobster reef cut away, FIG. 2 is a sectional view, and FIGS. 3 and 4 are cross-sectional views. FIG. 5 is a perspective view of the mold forming the reef chamber, FIG. 5 is a perspective view showing the construction process, FIG. 6 is a perspective view of the net frame, and FIG. 7 is a plan view of the net. Reference numeral 1 is the frame, 2 and 3 are reef chambers, 15 and 16 are molds, 2 rivers and net frames, 22, 23 and 24 are reinforcing bars, 25 is a net, and 27 is concrete. Figure 1 Figure 2 Figure 3 Figure 4 Figure 7 Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1. In the case of manufacturing an artificial fish reef consisting of a concrete frame to be submerged in the sea to collect, colonize, propagate, etc. seafood such as spiny lobster and root fish, the surrounding area may be surrounded by a net formwork. The process includes a molding process, a process of fixing a mold in the shape of a reef chamber that will become a habitat for fish and shellfish and disintegrating with water in a net formwork, and a process of pouring concrete into the formwork. A method for manufacturing an artificial reef, characterized in that after the mold is cured, the mold is decomposed with water to form a reef chamber. 2. The method for manufacturing an artificial fishing reef according to claim 1, wherein the mold is made of sawdust, wood chips, wood wool, etc., solidified with a water-soluble adhesive. 3. The artificial reef manufacturing method according to claim 1, wherein the mold is made of plywood that is easily decomposed by water and assembled using a water-soluble adhesive. 4. The artificial reef manufacturing method according to claim 1, wherein in the step of placing concrete, concrete is allowed to overflow from gaps in the net formwork.