JPS5974936A - Algae field bank prevented from wash digging - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] This invention relates to the sandy sea area σ) which is most necessary for promoting the development of coastal fisheries in Japan. 1-4) also relates to scouring prevention seaweed bed reefs that are indispensable for the creation of lice beds σ) Hello, Lee.

Nowadays, it is no exaggeration to say that the only way to stabilize the catch of fish in Japan is to promote coastal fishing, which has become a reality with 200 seawater loading and ocean loading (・1).
All of Japan's coasts are suitable habitats for fish and shellfish and cannot be called fishing grounds. Of course, it is true that the traditional fishing grounds along the coasts of industrial areas are not habitats for fish and shellfish, but the sandy beaches found throughout the Japanese archipelago are also considered barren waters for fishing. Of course, there are some small fish and shellfish that live there,
The amount is worth mentioning as a numerical value of the catch.
It is. In order to improve the catch of coastal fisheries, it is necessary to utilize this sandy sea area, known as the desert of the sea, as a habitat for useful aquatic life.

In order to develop a sandy beach as a good fishing ground, first of all, those σ)
Plant and animal plankton proliferate actively in the sandy sea area, and the larvae of marine animals feed on these θ) plants and grow by feeding on these θ) plants. The aim is to artificially create an environment that is fundamental to the cycle of life. In other words, if we are trying to reproduce fish and shellfish in the sandy sea area, the larvae of protozoa and plants that are necessary for the life support and growth of these fish and shellfish will live in the sandy seabed. We need to change our environment.

Protozoan larvae floating in the ocean can easily feed on phytoplankton and diatoms, and during intermediate growth and maturity (1-4), diatoms belonging to the yellow algae species are present. It becomes a feeding ground for protozoa only when it attaches to underwater objects, and it becomes a habitat for fish and shellfish only when dinoflagellate cyanobacteria or green algae and brown algae, which belong to the pyrophytes, begin to inhabit in large quantities. Therefore, in order to create a good fishing ground in the sandy sea area, it is necessary for algae to reproduce through photosynthesis and life respiration, and therefore it is necessary to install scours (σ) and reefs (σ) in the sandy sea area. come.

In general, there is a lot of drifting sand in sandy sea areas (conventionally, σ).If an artificial reef is made of concrete, stone, etc. and is made of vertical type to ensure stability, even if the artificial reef is installed in a sandy sea area, it will be washed away and buried. The development of duck breeding in sandy sea areas has been difficult (・) Also, the creation of seaweed beds for the purpose of creating fishing grounds is indispensable for raising young (・Since it is an environment creation, the water depth to be created is 3m~1
Since it is shallow at 0m, the motion of the waves acts all the way to the seabed, and the sand particles move back and forth in the direction of wave travel, so the first part of the song θ)A2) is likely to be rubbed by the sand particles.

This invention does not take into account the above-mentioned points.
The internal hollow part of the artificial reef, which is made of concrete 1 and has a bowl structure with two sides closed and the bottom open, which is hollow inside VCi4, collects water and sinks into the sandy surface of the ocean floor, and collects P water inside the reef. The purpose of the present invention is to provide a scouring-preventing seaweed bed reef that prevents scouring by obtaining fluid buoyancy from seawater. DESCRIPTION OF THE PREFERRED EMBODIMENTS A detailed description of the invention will be given below based on the drawings.

Fig. 1 is a perspective view showing the overall structure of a scour prevention line) which constitutes an embodiment of the present invention, Fig. 2 is a top view, and Fig. 3 is a
It is a sectional view taken along the line AA' in the figure.

In the same figure, I is composed of a reed on the main body and a flattened shape with a closed top and an open bottom, which will be described later. As you do,
A porous oxide layer 1a is formed with ferrous sulfate to allow diatoms to propagate well.

On the outer periphery of the reef body 1, there is also a 1 made of concrete material.
The two footnotes 2 are formed in one piece.

This pillar 2 extends downward from the bottom surface of the reef body 1, and maintains the stability of the reef by being buried in the sand. The scales of the above artificial reefs are 2.5m, 3m, 5m in height,
It is best to have a diameter of about 3 m, 5 m, or 8+-n, and the top of the reef body 1 and the top and bottom of the pillars 2 should be rounded to reduce frictional resistance. stomach)
. In addition, the interior of the reef body 1 has a shape that obtains fluid buoyancy from seawater, so any shape of hollow hole can be used.

A reef with the above-mentioned shape and structure is deposited on the sandy surface of the ocean floor.Reef body 1
Seawater is collected in the internal cavity of the vessel and the vessel is submerged. At the initial stage of sinking, the pillars 2 are gradually buried in the sand on the seabed, but the reef body 1
/7) When the bottom of the reef comes into contact with the sand surface, the fluid buoyancy of the city water collected in the inner cavity acts as a repulsive force against the 12 pillars 2 and seven reef bodies IJ) gravity. However, the reef body 1 is prevented from being further buried in the sand (. 1 - In other words, the fluid buoyancy of the seawater prevents the reef from scouring. Also, the shape of the pedestal 2 is... The two parts and the lower part are both spherical in shape.
] The pillar 2 also has the function of dispersing wave force and reducing the wave force applied to the center of the cylindrical reef body 1.

FIG. 4 is a perspective view showing the overall configuration of another embodiment.

Fig. 5 is its top view, Fig. 6 is Fig. 5 i11''l B-
It is a sectional view taken along the line B'. In Figures 4 to 6,
The parts with the same symbols as in Figures to Figure 3 are the same parts.
), the explanation will be omitted (the same applies to other drawings). 3 is a cylindrical block made of concrete 1 and lumber, and the outer periphery is also made of concrete. From /, f a) Twelve pillars 2 are integrally formed.

1) Footnote 2 also extends downward from the bottom of the side stand 3, as shown in Fig. 1, and this part is buried in the sand.
It has become so. This is a cylindrical I5Q block made of concrete material that is formed so that it can be stacked on the 4BtiJ Reservoir Battery. 5 is a 7j-shaped reef crest block with two sides closed and the bottom side open θ) which is formed so that it can be stacked on top of the reef block 4. Like the reef block, the reef crest block is made of concrete material. , r. As shown in FIGS. 1 to 3 above, these reef blocks 4 and reef top blocks 5 also have ferrous sulfate on their external surfaces for good propagation of diatoms, similar to the needle body 1 of the first embodiment. A porous oxide layer 4;], 521 is formed. The strings and teeth are connecting members that connect the breakaway 3 and the reef block 4, and the reef block 4 and the reef crest block 5.
) Details are shown in Figures 6 and 7.

? The connecting member 8.9 is shown in FIG. Conc! J -) p Insert the connecting members 8 and 9 from the C plate and tighten and fix them with the nuts 12a that are pulled from the resin material. A hole 15 is formed through a hole 15 made of a resin material, and as shown in FIG. Tighten and fix with 11b. 3
A semicircular concave groove 13 is provided at the two ends of the reef block 4σ).
If a semicircle 6.7 that fits into the concave groove] 3 is inserted into the lower part of the block 4 and the reef top block 5σ, it is possible to prevent seawater from flowing out inside the reef. This airtightness does not need to be so strict as long as it does not interfere with the fluid buoyancy of the seawater inside the reef. The scouring prevention principle is the first
The reef shown in Figure 3 is the same as the reef shown in Figures 4 to 6.
= On a reef, depending on the water depth, increase the number of blocks 4 to 2,
;It is possible to increase it further.

FIG. 10 is a diagram showing another embodiment, and as shown in the figure, the entire reef may be formed into a dome shape.

The above is the construction of ditches for the scouring-preventing seaweed bed that constitutes the embodiment of the present invention. Hereinafter, θ) Propagation of diatoms on the surface of the scouring-preventing seaweed bed reef will be explained. .

1 - The scouring prevention seaweed bed reef shown in the above example is made of concrete material. is 4a
, if 52 were not provided, -j;l+, concrete -1
・The surface will be exposed to seawater. When the concrete surface is exposed, alkaline components are released into the seawater, causing diatoms and
(This can become a hindrance to the settlement and growth of microorganisms, etc., resulting in the death of diatoms.)

When the diatoms die, they become a so-called knotted limestone layer, which is deposited on the surface and the diatoms become attached and no longer live there.

Therefore, as a countermeasure to this problem, there is an artificial reef (Patent No. 109'4127), which is a patent obtained by the present applicant. The outline of this artificial fish reef is that synthetic fiber flocking is applied to the surface of a concrete structure using static electricity. Applying this technology, synthetic wire &1 (111L hair of I) was also considered and experimented on the surface of the seaweed bed reef to prevent force washing in the above example.
In the sandy beach area, due to drifting sand and quicksand σ), the synthetic fiber flocks on the reef surface are cut by friction and lose their semi-permanence. There is a seaweed bed propagation reef that the present applicant previously applied for as an alternative to σ1 (Japanese Patent Application No. 56-172).
No. 6 O).

The outline of this technology is that recesses are formed on the surface of a concrete base, and a compound layer made of ferrous sulfate or the like is formed in these recesses.

When this twisted structure of seaweed bed breeding reef is allowed to settle to the sea floor,
No concrete parts are exposed from the compound layer in the depression, and iron is provided to the growth of diatoms without direct contact with seawater, creating an environment suitable for the growth of diatom feed organisms. Shi de two so I ro.

By applying the above technology, in the above embodiment of the present invention, there is a porous oxide layer 1 made of arsenic acid such as ferrous sulfate on the surface of the scour prevention seaweed bed reef. A porous oxide layer made of iron oxide such as ferrous sulfate is formed and prevents ejection of θ)PH13100 alkali from the concrete surface. (・Explain: On land on the coast, prepare a steel formwork of the shape of a reef to be installed in a sandy sea area, A paper sheet attached to the structure is stretched, and then suspension bars are placed.
Further concrete is poured. As a result, the ferrous sulfate is dissolved while the concrete 1. is set, and the ferrous sulfate melt is injected into the concrete 1. surface of the concrete joint, forming a porous oxide layer on the concrete surface.

After that, the steel mold frame is removed and the paper sheet is removed to form a structure that serves as a seaweed reef to prevent scouring of the porous σ) iron oxide concrete surface.

In the above embodiment, the porous acid layer was formed only on the surfaces of the reef block 4 and the reef top block 5, but this is not limited to this. This porous oxide layer may also be formed on the surface of the reef body 1, the detachment 3, and the surface of the reef body 1, detachment 3,
Reef block 4, reef crest block 5 (・Although the displacement is assumed to be cylindrical, it is not limited to a cylindrical shape, and may also be a polygonal tube shape (・.

As explained in detail above, the scour-preventing seaweed bed reef according to the present invention has a concrete reef body in the shape of an upside-down bowl with a closed top and an open bottom.・Multiple pieces σ) Concrete film-forming properties are integrally formed so as to extend to ・11°i5 structure, cylindrical J
) A concrete footnote extending downward from the bottom of the tip Buba battery is integrally formed on the outer periphery of the concrete cannon turret, as well as a concrete sill-shaped reef block and a concrete bowl with a closed top and an open bottom. Since the structure is such that the reef-making top blocks are sequentially stacked on top of the gun turret,
Due to the hydrodynamic buoyancy of the seawater collected within the reef, it has an extremely excellent effect of preventing scouring even when the reef is submerged on the sandy surface of the seabed in a sandy sea area, and it also has the advantage of preventing all or part of the reef surface. Since a porous oxide layer made of iron oxide or the like is formed on the surface, it has the excellent effect of suppressing the epiphytic growth and reproduction of diatoms.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of one embodiment of the present invention, Fig. 2 is a top view thereof, Fig. 3 is a sectional view taken along line A-A' in Fig. 2, and Fig. 4 is a perspective view of another embodiment of the invention. 5 is a top view thereof, FIG. 6 is a sectional view taken along line B-B' in FIG. Fig. 8 is a partially enlarged view showing the installation state of the connecting member, Fig. 9 is a partially enlarged view showing separation and the connection between the reef block and the reef block and the reef crest block, and Fig. 10 is a partially enlarged view showing the connection between the reef block and the reef crest block. FIG. 1 is a side view showing an embodiment. In the figure, ■ is the reef body, 2 pillars, 3 is separation, 1 is the reef block, and 5 is the reef crest block). Agent Patent Attorney Takashi Kumagaya 1st author Zm ￥I+4 times,? Z 15 prisoner 6 yen 7 kou warehouse 8 ki

Claims (3)

[Claims] (1) - A concrete reef body in the shape of a bowl 1 with a closed surface and an open bottom surface, and a plurality of concrete reef bodies formed integrally with the reef body on the outer periphery of the reef body and whose tips extend downward from the bottom surface of the reef body. A scour prevention seaweed bed reef 1゜ characterized by forming a porous oxide layer made of iron oxide etc. on the whole or part of the surface of the base, which has a structure consisting of concrete pillars. (2) The scouring-preventing seaweed bed reef according to claim 1, item (1), wherein the reef body has a circular cross section. (3) The scour-preventing seaweed bed reef according to claim t1+, characterized in that the cross section of the reef body has a polygonal shape. (41 Concrete cylindrical detachment, and a plurality of concrete footnotes formed on the outer periphery of the cannon body and whose tips extend downward from the bottom of the cannon, and a structure that overlaps the cannon. One or more concrete cylindrical reef blocks and a concrete 1 in the shape of an upside-down bowl with a structure that overlaps the reef blocks and has a closed top and an open bottom.
・A scour-preventing seaweed bed reef characterized by forming a porous oxide layer made of iron oxide etc. on the entire or part of the surface of the reef consisting of a reef-making crest block (5) Reef crest block, gun emplacement and a special feature in which the cross section of the reef block is circular. (61) A scour-preventing seaweed bed reef characterized in that the cross sections of the reef crest block, turret, and reef block are polygonal. Wow