JP2006067952A - Algae reef/fish reef and method for installing algae reef/fish reef in sea bed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for installing many algae reef/fish reef-blocks on the sea bed, as capable of easily translocating them in the sea bed with divers, and also arranging many algae reef/fish reef blocks in lengthwise and breadthwise directions on the sea bed so as not to be moved. <P>SOLUTION: This algae reef/fish reef is equipped with joining bodies 3 for joining in a plurality of algae reef/fish reef blocks 1 with in the plurality of the algae reef/fish reef blocks 1. The algae reef/fish reef block 1 is formed as a block form by porous concrete, and fixing rings 2 are fixed at its periphery. The joining body 3 is equipped with joining rings 4 to be joined with the fixing rings 2 of the algae reef/fishing reef blocks 1, at its both ends. By joining the joining rings 4 at the both ends with the fixing rings 2 of the algae reef/fish reef blocks 1, joining the adjacent algae reef/fish reef blocks 1 by a prescribed distance while making them in a state of capable of moving in up and down direction relatively. The algae reef/fish reef is provided by joining the algae reef/fish reef blocks 1 arranged along their outer periphery as a closed ring state by the joining bodies 3, also joining the algae reef/fish reef blocks 1 arranged at the inside by the joining bodies 3 in a prescribed distance, and further, joining with the outer peripheral algae reef/fish reef blocks 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for installing algae reefs / fishing reefs and algae reefs / fishing reefs on the seabed, and more particularly to a method for installing algae reefs / fishing reefs on the seabed by connecting a number of algae reefs / fishing reef blocks to the seabed. .

Several tons of large reefs made of concrete into large blocks need to be suspended from a large crane ship and placed on the seabed. For this reason, installation cost becomes high. In addition, because it cannot be easily transported on land, it is manufactured on the coast so that it can be transported by ship. For this reason, there is a defect that the manufacturing place is also restricted and cannot be manufactured efficiently and inexpensively at the factory. In order to eliminate this drawback, a structure in which a large number of natural stones are connected to form one fishing reef has been developed (see Patent Document 1).
JP 2002-330661 A

  The fishing reef described in Patent Literature 1 includes a plurality of natural stones provided with through holes, a connecting member that is inserted through the through holes of these natural stones to connect the plurality of natural stones, and is coupled to both ends of the connecting member. And a bowl-shaped member. Furthermore, this document also describes a technique in which a tubular member is arranged between each natural stone so that the interval between the natural stones is constant.

  When used as an artificial fish reef, a fishing reef with this structure is easy to attach algae and the like, has a high fish collection effect, has little secular change, and can be easily transported and installed. When used as a subsidence, it can be used without replacement for a long period of time. When used as a fishway, a fishway can be provided at a low cost by short-term construction. The revetment can be set up in a short period of time and at low cost.

  However, since the fishing reef with this structure has many natural stones inserted and connected to a connecting member such as a stainless steel rod, the overall weight increases when natural stones are enlarged. This is because many natural stones are connected together by one connecting member. For this reason, since this fishing reef is installed by a submarine on the seabed, it is necessary to make one natural stone small and light in order to lift it and move it to a predetermined position. Small natural stone fishing reefs cannot be placed on the seabed sand. This is because it is buried in the sand in a short time. Therefore, when a fishing reef having this structure is installed on the seabed, it is necessary to place it on a large fishing reef as described in Patent Document 1. However, if installed in this state, large fishing reefs are installed together, making it difficult to install all reefs.

  Furthermore, since the reef with this structure connects natural stones, it is difficult to make the surface easily adhere to seaweed and seaweed spores. Many natural stones have a smooth surface. Some of them have irregularities, but the irregularities are large, and it is not in a state where seaweed floating in the sea and spores of seagrasses are not easily attached. For this reason, it takes time for seaweeds and seaweeds to flourish.

  Furthermore, since this fishing reef is provided with a through hole in a natural stone, and a connecting member such as a metal rod is inserted and connected thereto, it takes much time to manufacture. This is because hard natural stones cannot be easily provided with through holes. In addition, natural stones provided with through holes are liable to break from this portion, and have a drawback that they are easily destroyed by large wave energy such as typhoons.

  In addition, since this fishing reef inserts a plurality of natural stones into a connecting member such as a metal rod and connects both ends of the connecting member, as shown in FIG. It is necessary to connect the connecting member 12 and the connecting member 12. When the connecting member 12 and the connecting member 12 are connected, the connecting portion and the natural stone 11 are easy to move, and it is difficult to stop all the natural stones 11 at a certain position. Further, there is a drawback that the connecting member 12 is easily detached.

  The present invention has been developed for the purpose of solving such drawbacks. An important object of the present invention is to make a single alga reef / fishing reef block larger while allowing the diver to move easily on the sea floor by making the entire body lighter, and also providing unevenness and susceptibility to seaweed and seaweed spores on the surface. Algae reefs and fishing reefs and alga reefs can be installed on the sea floor so that seaweeds and seaweeds can be efficiently propagated in a short period of time by providing gaps, and they are easy to manufacture and do not move many algae reefs and fishing reef blocks side by side -To provide a method for installing a reef on the seabed.

The algal reef and fishing reef of the present invention have the following configuration in order to achieve the above-described object.
The algae reef / fishing reef includes a plurality of algae reef / fishing reef blocks 1 and a connecting body 3 that connects the plurality of algae reefs / fishing reef blocks 1 vertically and horizontally.
The alga reef / fishing reef block 1 is made of porous concrete in order to make it large and light, and to provide fine irregularities and voids on the surface. Further, the alga reef / fishing reef block 1 is formed in a block shape having a weight of 10 kg or more and 300 kg or less so that a diver can move when installed on the seabed. Further, the algae reef / fishing reef block 1 connects adjacent ones, and a plurality of fixing rings 2 are fixed around the periphery at a predetermined interval so as to form a single algae reef / fishing reef.
The connection body 3 is provided with connection rings 4 connected to the fixing ring 2 of the alga reef / fishing reef block 1 at both ends. The connecting rings 4 at both ends are connected to the fixing ring 2 of the algal reef / fishing reef block 1, and the adjacent alga reef / fishing reef blocks 1 are connected at a predetermined interval. The connecting body 3 is connected in a state where the alga reef / fishing reef block 1 can move up and down relatively.
The above algae reefs / fishing reefs are arranged with a plurality of algae reefs / fishing reef blocks 1 arranged vertically and horizontally. The algae reef / fishing reef block 1 arranged in a ring shape along the outer periphery is connected in a ring shape closed by a connecting body 3, and the algae arranged inside the outer algae reef / fishing reef block 1. The reef / fishing reef block 1 is connected to the adjacent algae reef / fishing reef block 1 by a connecting body 3 at a predetermined interval, and further connected to the outer algae reef / fishing reef block 1.

  The alga reef / fishing reef according to claim 2 of the present invention has a plurality of algae reef / fishing reef blocks 1 located at the intersections of the grid lattice, and a plurality of algae reefs / fishing reef blocks 1 arranged in a plurality of columns and rows. ing. Adjacent algal reef / fishing reef blocks 1 are connected to each other by a connecting body 3 in a vertical and horizontal posture. The algae reef / fishing reef of this structure has the connected body 3 extending in the vertical and horizontal directions along the grid grid, and the alga reef / fishing reef block 1 is arranged at the intersection of the grids. The arrangement of the reef block 1 is not specified in this state. The present invention does not arrange the algae reef / fishing reef block 1 in a line, but arranges a plurality of algae reef / fishing reef blocks 1 in a predetermined width and length, that is, in the vertical and horizontal directions. , All the arrangements in which a plurality of algal reef / fishing reef blocks 1 are arranged in a region occupying a predetermined area can be adopted.

  In the alga reef / fishing reef of claim 3 of the present invention, the fixing ring 2 is fixed to the four surrounding surfaces with the alga reef / fishing reef block 1 as a rectangular parallelepiped. The rectangular parallelepiped algae reef / fishing reef block 1 is arranged in a plurality of rows and a plurality of columns in a posture in which the opposing surfaces are parallel to each other, arranged in the vertical direction and the horizontal direction. The connecting body 3 connects these algal reef / fishing reef blocks 1 vertically and horizontally.

  Further, in the algal reef / fishing reef according to claim 4 of the present invention, the weight of the alga reef / fishing reef block 1 is 20 kg to 80 kg. The alga reef / fishing reef according to claim 5 uses the connecting body 3 as a shackle.

  The algae / fishing reef according to claim 6 of the present invention is connected to an anchor nut 2B in which the fixing ring 2 is buried in porous concrete and fixed to the algae / fishing reef block 1 and screwed into the anchor nut 2B. A ring screw 2A connecting the ring 2b to the screw portion 2a is used. This fixing ring 2 is a process of molding the algal reef / fishing reef block 1 with porous concrete. The anchor nut 2B is embedded and fixed, and after the porous concrete is hardened, a ring screw 2A is screwed into the anchor nut 2B. 2 can be fixed to the algae / fishing reef block 1.

Further, according to the method of installing the algal reef / fishing reef on the seabed according to claim 7 of the present invention, on the land, porous concrete is filled into a mold and molded into a block shape having a weight of 10 kg or more and 300 kg or less. A manufacturing process for forming the alga reef / fishing reef block 1 by molding and fixing a plurality of fixing rings 2 around the periphery at predetermined intervals;
A sedimentation step of sinking a plurality of algae reef / fishing reef blocks 1 produced in the production process to the seabed;
Algae reefs / fishing reefs that have been submerged in the bottom of the seabed are moved along the seabed so that the distance between adjacent algae reefs / fishing reef blocks 1 is a predetermined interval. The block 1 is connected to the fixing ring 2 of the alga reef / fishing reef block 1 and the connecting rings 4 provided at both ends of the connecting body 3 to connect the adjacent alga reef / fishing reef block 1 to each other. A plurality of algal reef / fishing reef blocks 1 are installed in a predetermined state on the seabed in a state where they are connected to each other in the arrangement connecting step of connecting them in a state where they can move up and down.

  The method of installing the algae reef / fishing reef on the seabed according to claim 8 of the present invention is that the plurality of algae reef / fishing reef blocks 1 are arranged in a plurality of columns and a plurality of rows so as to be located at the intersections of the grid grid in the arrangement connecting step. The adjacent algae / fishing reef blocks 1 are connected to each other in the longitudinal direction and the lateral direction by the connecting body 3.

The method of installing the algae reef / fishing reef according to claim 9 of the present invention on the sea floor, in the manufacturing process, the porous concrete is molded into a rectangular parallelepiped with a mold, and the fixing ring 2 is fixed to four surfaces around the rectangular parallelepiped,
In the arrangement connecting step, the rectangular parallelepiped algae reef / fishing reef block 1 is in a posture in which the opposing surfaces are parallel to each other, arranged so as to be arranged in a plurality of rows in the vertical direction and a plurality of columns in the horizontal direction. The body 3 is connected in the vertical and horizontal directions.

  The method for installing the algae reef / fishing reef on the seabed according to claim 10 of the present invention is to manufacture the algae reef / fishing reef block 1 having a weight of 20 kg to 80 kg in the manufacturing process. The method of installing a fishing reef on the seabed uses a shackle as the connecting body 3 in the arrangement connecting step.

  The method of installing the algae reef / fishing reef and the algae reef / fish reef on the seabed of the present invention makes it possible for a diver to move easily on the seabed despite the fact that one algae reef / fishing reef block is enlarged, further simplifying production. However, it has the feature that it can be installed on the seabed so that many algae reefs and fishing reef blocks do not move side by side. That is, the alga reef / fishing reef of the present invention and its installation method are formed into a block shape with porous concrete, and a plurality of fixing rings are fixed around the algae reef / fishing reef block, This is because it is a connecting body having connecting rings at both ends, and a plurality of algae reef / fishing reef blocks are connected vertically and horizontally and installed on the seabed. The algae reef / fishing reef and its installation method of the present invention move a plurality of algae reefs / fishing reef blocks submerged on the seafloor instead of connecting a plurality of algae reefs / fishing reef blocks on land and sinking to the seabed. Then, connect the connecting ring of the connected body to the fixed ring of the algae reef / fishing reef block and connect the adjacent algae reef / fishing reef block with the connecting body to connect the plurality of algae reef / fishing reef blocks to each other. To do. Therefore, individual algae reef / fishing reef blocks can be enlarged so that divers can move easily on the sea bottom, and many algae reefs / fishing reef blocks set on the sea bottom can be easily and easily connected vertically and horizontally. It can be installed on the sea floor.

  In particular, according to the present invention, the algal reef / fishing reef block is made of porous concrete and shaped into a block having a weight of 10 kg or more and 300 kg or less. Sometimes it has the feature that divers can move easily. In addition, algal reefs and fishing reef blocks formed from porous concrete have features on the surface that form fine irregularities and voids that can easily adhere to seaweed and seaweed spores. is there.

  Embodiments of the present invention will be described below with reference to the drawings. However, the examples shown below exemplify the algae reef / fishing reef and its installation method for embodying the technical idea of the present invention, and the present invention describes the algae reef / fishing reef and the installation method as follows. Not specified.

  Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  In the alga reef / fishing reef shown in FIGS. 2 to 4, a plurality of algae reef / fishing reef blocks 1 are connected by a connecting body 3. FIG. 4 is a cross-sectional view showing a state where a plurality of algae reef / fishing reef blocks 1 are connected by a connecting body 3 and installed on the seabed.

  The alga reef / fishing reef block 1 is manufactured by molding with porous concrete. Porous concrete reduces the amount of water to be added and hardens the cement so that innumerable voids are formed between the aggregates, thereby producing the algal reef / fishing reef block 1. The algae / fishing reef block 1 made of porous concrete is manufactured as follows.

  A mortar is mixed with the aggregate to form a void aggregate paste. Aggregates are natural stone, crushed aggregate obtained by crushing natural stone into granules, one obtained by molding and sintering inorganic powder, and one obtained by molding and sintering inorganic powder into a predetermined size. is there. The aggregate obtained by sintering the inorganic powder can be made light by making the aggregate itself porous. The size of the aggregate determines the size of the gap. When a large aggregate is used, the gap becomes large. On the other hand, when the aggregate is made smaller, a large number of small voids can be formed. The size of the air gap should be such that the seaweed and seaweed floating on the seafloor are likely to adhere, the attached spores are difficult to flow out, and the seaweed and seaweed rhizome can adhere firmly. In order to realize this, it is preferable to provide a lot of fine voids, so the aggregate to be used is made small. Moreover, the voids in the porous concrete can also be used as habitats for fry and small animals. To achieve this, a relatively large aggregate is used to increase the gap. Considering this, the average particle diameter of the aggregate is, for example, 2 to 30 mm, preferably 3 to 20 mm, more preferably 3 to 15 mm, and most commonly 5 to 10 mm.

  The mortar added to the aggregate joins the aggregate so that a gap is formed between the aggregates by joining the aggregates at the contact points. Mortar is made by adding water to cement. However, a water-resistant synthetic resin can be added to the mortar. If the amount of mortar added to the aggregate is too large, the voids in the aggregate are closed and the porosity becomes low, and if it is too small, the aggregate cannot be bonded with sufficient strength. The amount of mortar added is adjusted to an optimum value in consideration of the bond strength of the aggregate and the required porosity. The addition amount of mortar is set to, for example, 3 to 50 parts by weight, preferably 5 to 30 parts by weight, and more preferably 5 to 20 parts by weight with respect to 100 parts by weight of the aggregate.

  The void aggregate paste is filled into a mold and becomes an algal reef / fishing reef block made of porous concrete. Since the alga reef / fishing reef block 1 shown in the figure is a rectangular parallelepiped, the void form paste is filled in a square form having a closed bottom and opened upward, and is hardened to form a porous concrete alga reef.・ Use reef blocks.

  In porous concrete, zeolite powder is added to mortar to which aggregates are bonded. The most suitable zeolite powder is an artificial zeolite produced by the following process. However, natural zeolite can be used instead of or in addition to artificial zeolite.

  In the process of producing Na-type artificial zeolite from inorganic powder composed of silica and alumina, fly ash, which is coal ash generated in large quantities as waste from a coal-fired power plant, can be used as the inorganic powder. Manufactured zeolite, which is a carrier of cation exchange power, is produced from fly ash. In order to make fly ash into artificial zeolite, the fly ash is immersed in an aqueous 1N sodium hydroxide solution for several hours and stirred. The concentration of the aqueous caustic soda solution is 1N to 3N. Thereafter, it is washed with water and dried to obtain a powdered artificial zeolite. The fly ash immersed in the aqueous caustic soda becomes Na-type artificial zeolite in which Si and Al are bonded through O. In the artificial zeolite produced in this way, 4 Os are bonded to Si and Al. Since Si is a positive tetravalent and Al is a positive trivalent, a surplus of one electron is left in the Al portion, and this portion becomes a negatively charged carrier. In the Na-type artificial zeolite, positive ions such as iron, cobalt, and magnesium ions can be bonded to the negatively charged portion of Al. The artificial zeolite thus produced has a cation exchange capacity of about 200 meq / 100 g.

  From Na type artificial zeolite, it can also be mixed with mortar as artificial zeolite carrying metal ions. In this artificial zeolite, artificial zeolite, which is a carrier obtained from fly ash, is immersed in an aqueous solution containing metal ions to allow the artificial zeolite to carry metal ions. Artificial zeolite carrying metal ions can be produced in substantially the same manner regardless of the type of metal ions.

  Hereinafter, a method for producing Fe-type artificial zeolite carrying iron will be described. The artificial zeolite is immersed in an aqueous solution containing iron ions. As the aqueous solution containing iron ions, an aqueous solution of iron chloride having a concentration of 1N is used. The immersion time of the artificial zeolite is about 3 hours. When the artificial zeolite is immersed in an aqueous solution of iron chloride, iron ions are bound to the negatively charged portion to form an Fe type artificial zeolite carrying iron. After iron ions are supported, they are washed with water and dried to obtain a powdery iron carrier.

  In order to allow artificial zeolite to carry cobalt or magnesium instead of iron, artificial zeolite is immersed in an aqueous solution of cobalt or magnesium chloride instead of immersion in an aqueous solution of iron chloride. The concentration and immersion time of the aqueous chloride solution are the same as those for immersion in the aqueous iron chloride solution. In this way, an artificial zeolite sandwiched with cobalt or magnesium can be produced.

  Sodium-type, iron-type, cobalt-type, and magnesium-type artificial zeolite produced in the above steps are mixed at a ratio of 3: 3: 1: 1 and added to the mortar. The reason for adding a large amount of iron-type artificial zeolite is that it can grow more effectively by supplementing seaweed and seaweed with iron. The reason why sodium-type artificial zeolite is mixed is that this type of artificial zeolite can most reduce the production cost. As the zeolite powder added to the mortar, only iron-type artificial zeolite can be used. In the mortar to which the artificial zeolite is added, for example, the addition amount of the zeolite powder is 1 to 50 parts by weight, preferably 5 to 40 parts by weight, more preferably 5 to 100 parts by weight of cement. Part by weight to 20 parts by weight.

  The alga reef / fishing reef block 1 formed of porous concrete is formed into a block having a weight of about 50 kg. The algal reef / fishing reef block 1 made of porous concrete has an apparent specific gravity of 2 to 2.5. The apparent specific gravity of the algae / fishing reef block 1 is adjusted by the type of aggregate and the mixing ratio of aggregate and mortar. The apparent specific gravity can be reduced by using a light aggregate as the aggregate, and the apparent specific gravity can be reduced by increasing the void ratio between the aggregates by reducing the amount of mortar mixed with the aggregate.

  However, according to the present invention, the alga reef / fishing reef block can be made into a block shape having a weight of 10 kg or more and 300 kg or less. The alga reef / fishing reef block that is lighter than 10 kg becomes smaller and its function as algae reef / fishing reef is reduced, and it becomes easy to be buried in sand. Also, algae reef and fishing reef blocks that are heavier than 300 kg cannot be installed on the sea bottom efficiently because the diver cannot move to a predetermined position on the sea floor.

  The alga reef / fishing reef block 1 can have a smaller apparent specific gravity and a larger weight. That is, it can be light and large. However, if the apparent specific gravity is too small, it will be easier to move with wave energy and tidal currents when installed on the ocean floor. Therefore, the apparent specific gravity of the algal reef / fishing reef block is, for example, 1.5 to 3, preferably 1.6 to 2.5, and more preferably 1.7 to 2.

As shown in FIG. 5, the alga reef / fishing reef block 1 is formed into a rectangular parallelepiped (cube) having a side of 30 cm, the total volume is 0.027 m ³ , the weight is about 50 kg, and the apparent specific gravity is 1.85. It is said. The rectangular parallelepiped algae reef / fishing reef block 1 can be stably installed on the seabed, and the fixing ring 2 can be fixed to the four sides of each side so that the adjacent algae reef / fishing reef block 1 can be stably connected by the connector 3. There are features. However, the present invention does not specify the shape of the alga reef / fishing reef block as a rectangular parallelepiped. The alga reef / fishing reef block can be formed into a polygonal column shape, a block shape with an irregular outer shape, a shape obtained by crushing natural stone, a spherical shape, or the like.

  The algae / fishing reef block 1 is installed on the seabed and adjacent ones are connected to each other. In order to connect adjacent algae reef / fishing reef blocks 1, the algae reef / fishing reef block 1 has a plurality of fixing rings 2 fixed around it at a predetermined interval. The alga reef / fishing reef block 1 shown in FIG. 5 has a fixing ring 2 fixed at the center of the four surrounding surfaces. A plurality of algae / fishing reef blocks 1 installed on the seabed are connected vertically and horizontally by a connecting body 3. Therefore, the alga reef / fishing reef block 1 has fixing rings 2 fixed on both sides and up and down in the plan view.

  The alga reef / fishing reef block 1 is settled on the seabed in a state of being separated into pieces. Submarine algae reef / fishing reef block 1 is connected to each other by connecting a connecting body 3 to a fixing ring 2 of an adjacent algae reef / fishing reef block 1 after a diver arranges it at a predetermined position. The fixing ring 2 is fixed to the algae / fishing reef block 1 in the manufacturing process of the algae / fishing reef block.

  FIG. 6 shows a fixing ring 2 fixed to the alga reef / fishing reef block 1. The fixing ring 2 in this figure is composed of an anchor nut 2B that is buried in porous concrete and fixed to the algal reef / fishing reef block 1, and a ring screw 2A that is screwed into and connected to the anchor nut 2B. The anchor nut 2B is temporarily fixed to a mold for forming the alga reef / fishing reef block 1, and is embedded and fixed in porous concrete formed by filling the mold. The ring screw 2A connects the ring 2b to a screw portion 2a that is screwed into the anchor nut 2B. In the ring screw 2A, the screw portion 2a and the ring 2b are made of a metal and have an integrated structure. Since the fixing ring 2 having this structure can fix the anchor nut 2B in the process of forming the algae reef / fishing reef block 1, the fixing ring 2 can be fixed to the algae reef / fishing reef block 1 so that the fixing ring 2 is not easily removed. However, the fixing ring can be fixed to the algae reef / fishing reef block after forming the algae reef / fishing reef block. This fixing ring is provided with a connection hole in the algae reef / fishing reef block and screwed into the connection hole.

  As shown in FIG. 7, the connecting body 3 connects adjacent algal reef / fishing reef blocks 1 to each other. The connection body 3 has a connection ring 4 connected to the fixing ring 2 of the algal reef / fishing reef block 1 at both ends. The connection ring 4 of the connection body 3 is connected to the fixing ring 2 at the seabed. The connection body 3 in the figure is a shackle. As shown in FIG. 8, the shackle has a set screw 3B screwed into the opening of the U-curved metal 3A. The U-curved metal 3A has a through hole 3a through which the set screw 3B is inserted at one end, and a female screw hole 3b into which the set screw 3B is screwed at the other end. The shackle is connected to the U-shaped metal 3A by inserting a set screw 3B into the through hole 3a and screwing a screw 3c at the tip into the female screw hole 3b. The shackle connects the U-shaped metal 3A to the set screw 3B, closes the opening, and connects to the ring. The shackle is connected to the fixing ring 2 by removing the set screw 3B and inserting one end into the fixing ring 2 and then screwing the set screw 3B into the U-curved metal 3A. The connecting body 3 in the figure connects two shackles and connects each shackle to the fixing ring 2 of the adjacent algal reef / fishing reef block 1. The connecting body 3 is connected to the fixed ring 2 by using a U-shaped metal 3 </ b> A as a connecting ring 4. The connecting body can be a single shackle, or three or more shackles can be linearly connected. Moreover, the connection body can also use what connects a shackle to the both ends of string bodies, such as a chain, and connects a shackle to a fixed ring. Furthermore, the algal reef and fishing reef of this invention can be set as all the structures which can be connected with a fixed ring on the sea bottom, without specifying a connection body as a shackle.

  Further, the connecting body 3 connects the connecting rings 4 at both ends to the fixing ring 2 of the algal reef / fishing reef block 1 so that the adjacent alga reef / fishing reef block 1 can move relatively up and down at a predetermined interval. Connect with The plurality of alga reef / fishing reef blocks 1 connected so as to be movable up and down by the connecting body 3 are installed along the seabed ridges as shown in FIG.

The alga reefs and fishing reefs shown in the above figure are installed on the sea floor in the following process.
(1) Manufacturing process Algae / fishing block 1 is manufactured on land. The alga reef / fishing reef block 1 is manufactured by filling a mold with porous concrete. The alga reef / fishing reef block 1 is formed into a block shape having a weight of 10 kg or more and 300 kg or less. Furthermore, the alga reef / fishing reef block 1 has a plurality of fixing rings 2 fixed around it at a predetermined interval.

(2) Sedimentation process A plurality of algae and reef blocks 1 produced in the production process are settled on the seabed. In this process, a plurality of algae reef / fishing reef blocks 1 are mounted on a ship, transported to an installation site, dumped into the sea from the ship, and settled on the seabed. It is not necessary to arrange the alga reef / fishing reef block 1 at a predetermined position in this step.

(3) Arrangement connection process The alga reef / fishing reef block 1 settled on the sea floor is moved on the sea floor by a diver so that the interval between adjacent algae reef / fishing reef blocks 1 becomes a predetermined interval. Thereafter, connecting rings 4 provided at both ends of the connecting body 3 are connected to the fixing rings 2 of the algal reef / fishing reef block 1 arranged at a predetermined interval, and the adjacent algae reef / fishing reef is connected with the connecting body 3. The blocks 1 are connected in a state in which they can move relatively up and down. In this state, the algae reef / fishing reef is installed in a state where a plurality of algae reef / fishing reef blocks 1 are connected to each other in a predetermined region of the seabed.

  In the algal reefs / fishing reefs of FIGS. 2 and 3, a plurality of algae reefs / fishing reef blocks 1 are arranged in a plurality of columns and a plurality of rows so as to be located at intersections of the grid grid. Further, adjacent algae reef / fishing reef blocks 1 are connected in a longitudinal direction and a lateral direction by a connecting body 3.

  The shackle connector 3 is connected to the fixing ring 2 by inserting one end of the U-curved metal 3A into the fixing ring 2 with the set screw 3B removed, and connecting the set screw 3B to the tip of the U-curved metal 3A. . The interval between the algae reef / fishing reef block 1 is adjusted by the length of the connector 3. The algae reef / fishing reef shown in the figure has a coupled body 3 having a length of 20 to 30 cm and is connected to algae reef / fishing reef block 1. The length of the connection body 3 is preferably shorter than, substantially equal to, or slightly longer than the length of one side of the alga reef / fishing reef block 1.

It is a top view which shows an example of the conventional algae reef and fishing reef. It is a top view of algae reef and fishing reef concerning one example of the present invention. It is a perspective view of the algae reef and fishing reef shown in FIG. It is sectional drawing which shows the state which lays the algae reef and fishing reef shown in FIG. 2 on the seabed. It is a perspective view which shows an example of an algal reef and a fishing reef block. It is an exploded sectional view showing an example of a fixing ring. It is a side view which shows the state which connects an adjacent algal reef and fishing reef block with a coupling body. It is a disassembled perspective view which shows an example of a coupling body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Algae reef / fishing reef block 2 ... Fixed ring 2A ... Ring screw 2B ... Anchor nut
2a ... Screw part 2b ... Ring 3 ... Connection body 3A ... U-curved metal 3B ... Set screw
3a ... Through hole 3b ... Female screw hole
3c ... Screw 4 ... Connection ring 11 ... Natural stone 12 ... Connection member

Claims (11)

A plurality of algae / fishing reef blocks (1) which are made of porous concrete and have a weight of 10 kg or more and 300 kg or less and have a plurality of fixing rings (2) fixed around them at a predetermined interval. ) And a connecting ring (4) connected to the fixing ring (2) of the alga reef / fishing reef block (1) at both ends, and the connecting ring (4) at both ends of the algae reef / fishing reef block (1) It is connected to the fixing ring (2), and is provided with a connecting body (3) that is connected at a predetermined interval while being able to move the adjacent alga reef / fishing reef block (1) relatively up and down,
Multiple algae reef / fishing reef blocks (1) are arranged vertically and horizontally, and the algae reef / fishing reef blocks (1) arranged in a ring along the outer periphery are connected in a ring closed by a connector (3) The algae reef / fishing reef block (1) placed inside the outer algae reef / fishing reef block (1) is connected to the adjacent algae reef / fishing reef block (1) at a predetermined interval by the connector (3). An algae reef / fishing reef characterized by being connected to the outer algae reef / fishing reef block (1).   Multiple algae reef / fish reef blocks (1) are arranged in multiple rows and multiple rows at the intersection of the grid lattice, and adjacent algae reef / fish reef blocks (1) are connected in the vertical and horizontal directions. The algae / fishing reef according to claim 1, which is connected to each other in (3).   The alga reef / fishing reef block (1) is a rectangular parallelepiped, and the fixing ring (2) is fixed to the four surrounding surfaces. The alga reef / fishing reef according to claim 1, wherein the alga reefs are arranged in a plurality of rows in the vertical direction and in a plurality of columns in the horizontal direction, and are connected in the vertical direction and the horizontal direction by a connecting body (3).   The alga reef / fishing reef according to claim 1, wherein the weight of the alga reef / fishing reef block (1) is 20 kg to 80 kg.   The alga reef / fishing reef according to claim 1, wherein the connector (3) is a shackle.   An anchor nut (2B) in which the fixing ring (2) is embedded in porous concrete and fixed to the algae reef / fishing reef block (1), and a threaded portion (2a) that is screwed and connected to the anchor nut (2B) The alga reef / fishing reef according to claim 1 or 5, comprising a ring screw (2A) connecting the ring (2b) to the ring. On land, porous concrete is filled into a mold and molded into a block shape with a weight of 10 kg or more and 300 kg or less, and a plurality of fixing rings (2) are fixed around the periphery at predetermined intervals. Manufacturing process for manufacturing algae reef and fishing block (1),
A subsidence step of sinking a plurality of algal reef and fishing reef blocks (1) manufactured in the manufacturing process to the seabed;
The diver moves on the seabed and is placed at a predetermined interval so that the distance between the adjacent algae reef / fishing reef block (1) is the predetermined interval. Connect the algae reef / fishing reef block (1) to the fixing ring (2) of the algae reef / fishing reef block (1) with the connecting rings (4) provided at both ends of the connecting body (3). 3) With the arrangement connection process where the adjacent algal reef / fishing reef block (1) is connected in a state where it can move relatively up and down,
A method of installing an algal reef / fishing reef on a seabed in which a plurality of algae reef / fishing reef blocks (1) are connected to each other in a predetermined area of the seabed.   In the arrangement connecting step, multiple algae reef / fishing reef blocks (1) are arranged in multiple rows and multiple rows so as to be located at the intersection of the grid grid, and adjacent algae reef / fishing reef blocks (1) are connected. (3) The method of installing the algae reef / fishing reef according to claim 7 connected to the vertical direction and the horizontal direction on the seabed. In the manufacturing process, porous concrete is molded into a rectangular parallelepiped to produce algae reef / fishing reef block (1), and fixing rings (2) are fixed to four surfaces around the rectangular algae reef / fishing reef block (1),
In the arrangement connecting step, the rectangular algae / fishing reef blocks (1) are arranged in such a manner that their opposing surfaces are parallel to each other and arranged in a plurality of rows in the vertical direction and in a plurality of columns in the horizontal direction. The method for installing the algae reef / fishing reef on the seabed according to claim 7, wherein the connection body (3) is connected in the vertical and horizontal directions.   The method for installing the algae reef / fishing reef on the seabed according to claim 7, wherein the algae reef / fishing reef block (1) having a weight of 20 kg to 80 kg is produced in the production process. The method of installing a seaweed reef / fishing reef according to claim 7, wherein a shackle is used as the connection body (3) in the arrangement connection step.

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