JP2660499B2 - Manufacturing method of concrete fishing reef - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a concrete reef, and more particularly, to a method for producing a reef close to a natural reef, although it is made of concrete.

[0002]

2. Description of the Related Art An enormous amount of crushed stone waste is generated nationwide. The amount generated tends to increase sharply. This is because the collection of natural aggregate such as gravel and sand, which is necessary for constructing a concrete structure, is restricted. When it becomes impossible to collect natural aggregate, it is necessary to crush crushed stones to produce gravel and sand. In the process of crushing crushed stone to produce gravel, a large amount of crushed stone is generated. Crushed stone waste is fine particles that cannot be used as gravel. Crushed stones cannot be crushed to a certain particle size. When crushed, large particles and small particles are formed. Those smaller than a certain particle size cannot be used as gravel and will be crushed stone waste. Crushed stone waste is generated in greater amounts when producing sand of smaller particles than gravel. If the crushed stone is crushed to a smaller size, fine particles that cannot be used as sand are considerably generated.

[0003]

The inability to effectively use crushed stone waste has increased the cost of gravel and sand.
The only way to dispose of crushed stone waste is to dump it in mountains. It has unfavorable properties as landfill sand and cannot be used for this purpose. This is because the average particle diameter is extremely small because the particles of gravel and sand are separated. This is because when used for landfill, drainage is extremely poor, and when water is included, it becomes extremely soft. To complicate matters, waste of crushed stone waste is huge, and it costs a lot of money to dispose of it. Nevertheless, gravel and sand need to be produced at low cost. This is because the amount of use is extremely large. Thus, how to treat crushed stone waste is the biggest issue for crushed crushed stone and gravel and sand producers, and this is the biggest factor determining whether the industry is profitable. It has become.

[0004] A first object of the present invention is to eliminate this adverse effect, that is, to reduce the cost of gravel and sand produced from crushed stone by effectively recycling waste crushed stone.

[0005] In addition, concrete fishing reefs have a shape that makes it difficult for spores of seaweed to adhere thereto in order to make the surface smooth. In addition, the fact that concrete has a strong alkalinity hinders the propagation of seaweed and the like. For this reason, the conventional concrete reef has a drawback that it cannot provide an environment suitable for the propagation of seaweed and the inhabitation of marine organisms. Such a concrete reef has a significantly different environment from natural rock reefs, and it is difficult to realize an important near-nature environment as a reef where marine organisms can coexist.

[0006] In order to make the surface of the concrete reef an environment suitable for the inhabitation of marine organisms, an artificial reef provided with a surface layer of a ceramic sintered body or a sprayed body is disclosed in Japanese Patent Publication No. 3-54538.
No. in the official gazette. Further, a fishing reef in which charcoal is buried so as to be exposed on the surface is described in Japanese Utility Model Laid-Open No. 3-10841. In addition, fishing reefs commonly called “gabions” in which natural rocks and the like are placed in water-permeable bags have been developed.

However, it is difficult to efficiently and inexpensively manufacture the concrete fishing reefs described in these publications and to make the habitat of marine organisms comfortable over a large area of the fishing reef surface. Artificial reefs provided with a surface layer of a ceramic sintered body or a sprayed body cannot prevent the surface from becoming strongly alkaline. When the cement is mixed with water, the pH can quickly reach 12
~ 13, and alkali metal ions such as K ⁺ , Na ⁺ , Ca ⁺⁺ elute. Concrete hardens while increasing the amount of alkali metal ions eluted. After curing, the fine voids of the concrete, the alkali metal ions and (OH) ^- it is a solution containing the remaining. Subsequent changes in the composition of the solution are small, making the concrete surface a strong alkali, which adversely affects marine organisms. The surface layer of the ceramic sintered body or the sprayed body or the charcoal buried in the surface cannot effectively prevent the strong alkaline property of the concrete surface.
This is because the solution containing alkali metal ions or (OH) ⁻ easily penetrates the surface because the ceramic surface layer and the charcoal layer cannot be thickened.

A gabion in which a large number of natural stones and the like are placed in a net basket does not have such a disadvantage, and provides a comfortable environment for marine organisms. However, the artificial reef of this structure has a disadvantage that the whole cannot be formed into a specific large shape.
For this reason, it cannot be installed on the sea floor to provide a large gap. Further, it is not possible to provide a void having a specific shape. Some concrete reefs are required to have a shape that allows shrimp and shellfish to breed and also allows the fish and shellfish bred here to be easily captured. Gabions are a comfortable environment for marine organisms, but it is difficult to easily capture bred fish and shellfish. This is because the seafood is hidden between the natural stones and the like in the bag.

A second object of the present invention is to eliminate this adverse effect, that is, to realize a comfortable environment for marine organisms,
An object of the present invention is to provide a method for manufacturing a concrete reef that can be formed into an ideal shape as a reef.

[0010]

According to the method for manufacturing a concrete fishing reef of the present invention, a concrete fishing reef is manufactured as described below to achieve the above-mentioned object. The manufacturing method of the present invention is to manufacture a crushed stone slab using a crushed stone waste soil having no effective disposal method as a raw material. The crushed stone sintered plate 1 is manufactured by the following steps. The crushed stone waste soil is adjusted to the moisture content that can be formed to make crushed clay. The crushed stone waste soil containing a large amount of water is adjusted to a value at which the water can be formed by, for example, pressing using a filter press. Crushed stone waste soil with low water content is added with water so that it can be formed. Crushed stone waste with moisture suitable for forming can be made into crushed clay without adding moisture. Crushed clay is formed into a shape along the surface of the fishing reef. The shape formed in this step is generally plate-like. However, it is not always necessary to form the plate. For example, it can be formed in a square shape. Square shaped crushed stone sintered plate is
Like an interlocking block, it lays down and covers the surface of the reef. The formed crushed stone clay is sintered to obtain a crushed stone sintered plate 1. Since the crushed stone sintered plate 1 is obtained by sintering inorganic powder that is crushed stone waste soil, it has properties close to those of natural stone. Unlike concrete, the surface does not become strongly alkaline.

The sintered crushed stone plate 1 is fixed to the surface of the concrete fishing reef 11 as described below. The crushed stone slab 1 is temporarily fixed to a concrete form 2 for forming a concrete fishing reef 11. The crushed stone plate 1 is temporarily fixed to a position covering the surface of the concrete fishing reef 11. The entire surface of the concrete fishing reef 11 can be covered with the crushed stone sintered plate 1. In this concrete reef, a crushed stone slab is temporarily fixed to the entire inner surface of the formwork. However, it is not always necessary to cover the entire surface of a concrete reef with a crushed stone sinter. For example, a crushed stone sinter may be fixed only to the top and side surfaces of a concrete fishing reef, and the bottom surface may be a concrete surface.

[0012] The formwork 2 on which the crushed stone sintered plate 1 is temporarily fixed is
The ready-mixed concrete 10 is cast. Fresh concrete 10
Is in close contact with the back surface of the crushed stone plate 1 temporarily fixed to the formwork 2 and fixes it. After hardening the ready-mixed concrete 10, the concrete fishing reef 11 is removed from the formwork 2. The demolded concrete fishing reef 11 has a crushed stone sintered plate 1 inserted and fixed on the surface. In the method of using the immediate release concrete for the ready-mixed concrete filled in the formwork, the immediate release concrete is released before the concrete hardens. Immediate demolding concrete has a slump value of 0 and has no fluidity.
Pressing is performed on the formwork, and if necessary, vibration is applied during the driving.

Furthermore, the method for manufacturing a concrete fishing reef according to claim 2 of the present invention is different from the method for fixing the crushed stone slab 1 to the fishing reef. In this manufacturing method, the crushed stone sintered plate 1 manufactured by the above-described method is used to adhere to the surface of a fishing reef having concrete in a predetermined shape using an adhesive 12 or fixed via a fixture. I do.

[0014]

The concrete fishing reef of the present invention is covered with a crushed stone sinter obtained by sintering crushed stone waste soil. Concrete reefs are large because they are installed in a very large sea, and the number of used reefs is considerably large. Crushed stone sinters fixed to large concrete reefs require large amounts of waste crushed stone. This is very important as a use for effectively utilizing crushed stone waste soil. This is because the amount of waste crushed stone is extremely large. The method of the present invention, which can effectively reuse a huge amount of crushed stone waste soil, is an ideal use of crushed stone waste soil.

Furthermore, the crushed stone waste soil realizes an ideal environment as a fishing reef, even in a used state. This is because the crushed stone sinter obtained by sintering the crushed stone waste is a fired product, not a concrete molded product. Most of the crushed stone waste is an inorganic powder composed of silica and alumina. A fired product obtained by molding and firing an inorganic powder exhibits properties close to those of a natural rock reef. Natural reefs are also made by firing volcanic activities of inorganic materials mainly composed of silica and alumina. The surface of the thus-produced crushed stone slab does not show strong alkalinity unlike concrete. For this reason,
Strong alkali does not adversely affect marine organisms.
Furthermore, since the crushed stone sintered plate is formed by crushing crushed clay and firing, the rugged clay can be easily provided with irregularities on the surface when the crushed clay is formed. Further, it can be formed into various complicated shapes. It is not limited to a smooth surface like a concrete reef. This also has the effect that it can be shaped into a shape close to a natural reef. That is, the method of the present invention can produce a concrete reef having an ideal environment as a reef close to a natural rock reef by effectively utilizing a huge amount of crushed stone waste soil.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. However, the following examples illustrate a method of manufacturing a concrete fishing reef for embodying the technical idea of the present invention, and the manufacturing method of the present invention uses the following materials and shapes of the concrete fishing reef. It is not something specific to the thing.

Further, in this specification, in order to make it easy to understand the claims, the numbers corresponding to the members shown in the embodiments will be referred to as “claims”, “action”, and “action”. In the column of "Means for solving the problem". However, the members shown in the claims are
It is by no means specific to the members of the embodiment.

FIG. 1 is a perspective view of a concrete reef 11 manufactured by the method of the present invention. The concrete fishing reef 11 shown in this figure has a square tube shape as a whole. The concrete reef 11 has the crushed stone slab 1 fixed to the entire outer surface. The concrete fishing reef 11 in this figure is
Even if it is turned upside down, the state of the surface covered with the crushed stone sintered plate 1 does not change. For this reason, when installing on the seabed, there is no need to specify the upper and lower sides, and it can be installed with any surface facing up. However, the concrete fishing reef may have a shape in which the crushed stone slab is not fixed to the bottom surface when installed on the sea floor. Further, the concrete fishing reef may have a structure in which a crushed stone sinter is not fixed to a part of the surface. In this concrete fishing reef 11, the crushed stone sintered plate 1 is not fixed to the inner surface of the rectangular tube. However, the ideal concrete reef has crushed stone slabs fixed on as large a surface as possible. This is because the crushed stone slab provides an ideal environment as a fishing reef rather than concrete.

Further, in the production method of the present invention, the shape of the concrete fishing reef 11 is not specified as the rectangular tube shape shown in FIG. It can be any shape that is already manufactured or will be developed now. This is because the method for producing a concrete reef of the present invention is characterized by fixing a crushed stone slab on the surface of the reef, instead of making the shape of the reef unique.

The crushed stone sinter 1 fixed to the surface of the concrete fishing reef 11 is manufactured as follows. [Step of Converting Crushed Stone to Crushed Clay] Crushed stone waste obtained when crushed crushed stone is crushed into coarse aggregate or crushed crushed stone is formed into fine aggregate is inorganic powder of fine particles. The crushed stone waste soil is separated from the aggregate by washing the crushed coarse aggregate and fine aggregate with water. Therefore, the crushed stone waste soil separated from the aggregate contains a large amount of water. Rather, it is a mixture of a large amount of waste crushed stone in water. The crushed stone waste soil is squeezed by, for example, a filter press to separate water. The crushed stone waste soil from which water has been separated is added with water or dried to further remove water, and adjusted to a moisture content that can be formed to obtain crushed clay.

[Step of Forming Crushed Stone Clay]
Forming a crushed stone slab by shaping it into a shape that follows the surface of a concrete fishing reef. Concrete fishing reef 11 shown in FIG.
As shown in FIG. 2, a crushed stone sintered plate 1 formed into a rectangular plate shape is fixed on the surface. The base 16 is a crushed stone sinter 1
It is formed in the same shape as. Therefore, the base 16 of the crushed stone sintered plate 1 fixed to the concrete fishing reef 11 shown in FIG.
Is formed into a plate shape. The plate-shaped base body 16 is formed in a square shape having a side of 5 to 50 cm, for example, and is formed as thick as possible to be fired. This is because a thick base material, that is, a thick crushed stone plate can more reliably prevent the permeation of the solution containing alkali metal ions on the concrete surface. Therefore, the thickness of the substrate is formed, for example, to 5 cm. However, the thickness of the base should be 1 to 1 in consideration of the overall size and the like.
It can be 0 cm. The crushed stone plate can also be made into a block shape. The base material of the crushed stone sintered plate is formed into a block shape. The crushed stone slab in the form of a block covers the surface of the fishing reef by laying down without gaps like an interlocking block laying down on the road surface.

Although one surface of a concrete fishing reef can be covered with one crushed stone sinter, generally one surface of the fishing reef is covered with a plurality of crushed stone sinters. One of the big reefs
This is because the surface is covered with a small crushed stone plate. The crushed clay is placed in a mold and pressed to form a certain shape. The substrate preferably has a textured surface, as shown in FIGS. The substrate 16 of FIG.
7 are provided. The substrate of FIG. 4 has random irregularities 18. A crushed stone sinter having an uneven surface is easy for spores and the like of seaweed to adhere thereto, which is convenient for growing seaweed. Also, a comfortable habitat for small animals can be provided. Furthermore, by making the surface of the crushed stone sintered board porous, it is possible to provide a living space for even smaller microorganisms. In order to make the surface of the crushed stone sintered plate porous, the surface of the base material is mixed with sawdust or the like which is burned off during firing and formed.

The base is provided with a through hole 3 for temporarily fixing the crushed stone plate 1 to the formwork 2. As shown in FIG. 5, the crushed stone sintered plate 1 having the through-holes 3 can be temporarily fixed to a fixed position of the formwork 2 by inserting a locking pin 4 here.

[Step of firing the base] The base obtained by forming the crushed clay is placed in a firing furnace and fired. The fired base material becomes a crushed stone sintered plate. The firing temperature of the substrate is about 900 ° C. However, the firing temperature of the green body may be 800 to 1000 ° C.

Using the crushed stone sintered plate manufactured in the above steps, a concrete fishing reef is manufactured as follows. [Step of Temporarily Fixing Crushed Stone Sintered Plate to Formwork] As shown in FIG. 6, the crushed stone sintered plate 1 is temporarily fixed to the inner surface of the formwork 2. The crushed stone plate 1 is temporarily fixed to the entire inner surface of the forming chamber 2 </ b> A of the mold 2. The crushed stone slabs 1 adjacent to each other are temporarily fixed to the formwork 2 in such a manner that the crushed stone sintered plates 1 are brought into close contact with each other and the gap is reduced as much as possible. The crushed stone sintered plate 1 obtained by firing the crushed clay is temporarily fixed to the mold frame 2 with the stopper pins 4 inserted into the through holes 3 as shown in the cross-sectional view of FIG. The stop pin 4 has a flange 5 at the tip. The flange 5 is in close contact with the inner surface of the crushed stone plate 1 and closes the through hole 3, and also prevents the locking pin 4 from coming out of the through hole 3 of the crushed stone plate 1. Further, the retaining pin 4 is provided with a break groove 6 at a portion to be inserted into the through hole 3 of the crushed stone slab 1 so as not to hinder the concrete fishing reef from being removed from the formwork 2. The breaking groove 6 is provided so that when the locking pin 4 is bent, it is easily cut from this portion. further,
The stop pin 4 has a slit 8 for inserting a wedge 7. The locking pin 4 of this structure is inserted through the through hole 3 of the crushed stone sintered plate 1 and the temporary fixing hole 9 provided in the mold 2, and the wedge 7 is driven into the slit 8 to move the crushed stone sintered plate 1 to the mold. Temporarily fix to the inner surface of 2. The formwork 2 has a temporary fixing hole 9 at a position opposite to the through hole 3 of the crushed stone sintered plate 1. Crushed stone sintered plate 1
One or more places are temporarily fixed to the formwork 2 with the fixing pins 4.

[Step of placing ready-mixed concrete on a formwork]
As shown in FIG. 7, the ready-mixed concrete 10 is poured into the molding chamber 2A of the formwork 2. The ready-mixed concrete 10 may be a fluid concrete or a 0-slump immediate-release concrete. Generally, fluid ready-mixed concrete is used. Although not shown, the instant-release concrete is press-fitted or vibrated to be pressed into the molding chamber without any gap. After the ready-mixed concrete 10 is cast, the upper surface of the molding chamber 2A is closed with the cover plate 2B, which is the mold 2, as shown in FIG. The cover plate 2B temporarily holds the crushed stone sintered plate 1 on the lower surface.

[Step of Removing Concrete Reef from Mold] After the concrete has hardened, the wedge 7 of the stop pin 4 is removed, and the stop pin 4 is cut by the break groove 6. Thereafter, the cover plate 2B is removed from the mold 2, and the male mold 2C is pulled out as shown in FIG. 9 so that the concrete fishing reef can be released.
In this state, as shown in FIG. 10, the concrete fishing reef 11 is pulled out from the female mold 2D and removed. When the concrete reef 11 is released from the female mold 2D, the female mold 2D can be divided.

The concrete fishing reef manufactured in the steps shown in FIGS. 6 to 10 has a crushed stone sinter buried on the outer surface of the concrete fishing reef. As for the inner surface, the crushed stone slab is not buried and remains concrete. However, in the method for manufacturing a concrete fishing reef of the present invention, needless to say, the crushed stone sintering plate can be buried also on the inner surface of the concrete fishing reef, and as shown in FIG. It can also be covered with 1.

FIGS. 12 to 16 show a manufacturing process of a concrete fishing reef in which a crushed stone slab is embedded on the inner surface in addition to the outer surface of the concrete fishing reef. These steps are almost the same as the steps shown in FIGS. 6 to 10 already described.

[Step of Temporarily Fixing Crushed Stone Plate to Form] As shown in FIG. 12, the crushed stone sintered plate 1 is temporarily fixed to the inner surface of the female mold 2D and the outer surface of the male mold 2C for the mold 2 as shown in FIG. . The crushed stone plate 1 is temporarily fixed to the entire inner surface of the forming chamber 2 </ b> A of the mold 2. The crushed stone slabs 1 adjacent to each other are temporarily fixed to the formwork 2 in such a manner that the crushed stone sintered plates 1 are brought into close contact with each other and the gap is reduced as much as possible. The step of temporarily fixing the crushed stone plate 1 to the mold 2 is the same as that described with reference to FIG. However, since it is necessary to temporarily fix the crushed stone sintered plate 1 on the surface of the male mold 2C, an opening is provided on the upper surface of the male mold 2C.

The crushed stone sintered plate 1 obtained by firing the crushed clay is shown in FIG.
As shown in the cross-sectional view of FIG. The stop pin 4 has a flange 5 at the tip. The flange 5 is in close contact with the inner surface of the crushed stone
Of the crushed stone sintered plate 1
Prevent from falling out. Further, the retaining pin 4 has a breaking groove 6 at a portion inserted into the through hole 3 of the crushed stone slab 1 so as not to be in the way when the concrete fishing reef is removed from the formwork 2. The breaking groove 6 is provided so that when the locking pin 4 is bent, it is easily cut from this portion. Further, the stopper pin 4 is provided with a slit 8 for inserting a wedge 7. The locking pin 4 of this structure is inserted through the through hole 3 of the crushed stone sintered plate 1 and the temporary fixing hole 9 provided in the mold 2, and the wedge 7 is driven into the slit 8 to move the crushed stone sintered plate 1 to the mold. 2
Temporarily fix to the inner surface of. The formwork 2 has a temporary fixing hole 9 at a position opposite to the through hole 3 of the crushed stone sintered plate 1. Crushed stone sintered plate 1
Is temporarily fixed to the formwork 2 at one or a plurality of positions with the stopper pins 4.

[Step of placing ready-mixed concrete on a formwork]
As shown in FIG. 13, ready-mixed concrete 10 is poured into the molding chamber 2 </ b> A of the mold 2. The ready-mixed concrete 10 may be a fluid concrete or a 0-slump immediate-release concrete. Generally, fluid ready-mixed concrete is used. Although not shown, the instant-release concrete is press-fitted or vibrated to be pressed into the molding chamber without any gap. After placing the ready-mixed concrete 10, as shown in FIG.
Close with. The cover plate 2B temporarily holds the crushed stone sintered plate 1 on the lower surface.

[Step of Removing Concrete Fishing Reef from Mold] After the concrete has hardened, the wedge 7 of the stop pin 4 is removed, and the stop pin 4 is cut by the break groove 6. Thereafter, the cover plate 2B is removed from the formwork 2 and the male mold 2C is pulled out as shown in FIG. 15, so that the concrete fishing reef can be released. In this state, as shown in FIG. 16, the concrete fishing reef 11 is pulled out from the female mold 2D and removed. When the concrete reef 11 is released from the female mold 2D, the female mold 2D can be divided. A crushed stone sinter 1 is buried on the entire surface of the removed concrete reef.

As described above, a concrete fishing reef having a crushed stone sinter buried on its surface is manufactured. The method for manufacturing a concrete fishing reef of the present invention does not specify a method of embedding a crushed stone slab in concrete. The crushed stone slab 1 can also be bonded and fixed to the surface of the concrete fishing reef 11 with the adhesive 12. As the adhesive, a mortar, epoxy or urethane synthetic resin adhesive can be used. As shown in FIG. 17, the crushed stone sinter 1 bonded with the adhesive 12 preferably has an uneven surface as the bonding surface. This is because they are strongly bonded. The method of bonding the crushed stone slab to the fishing reef surface is also
Adhesive bonding of adjacent crushed stone plates without gaps.

Further, in the concrete fishing reef of the present invention, the crushed stone slab can be fixed to the surface of the fishing reef via a fixture. FIG. 18 shows a structure for fixing a crushed stone slab to the surface of a fishing reef. In this concrete reef, the crushed stone slab 1 is fixed to the concrete reef 11 using an anchor bolt 13 as a fixture. The anchor bolt 13 taps a fixing cylinder 15 made of lead or plastic into a fixing hole 14 opened in the concrete fishing reef 11 and screws it into this.

The method of fixing the crushed stone slab to the surface of the concrete fishing reef with an adhesive or a fixture has the advantage that the surface of the fishing reef manufactured by the current method can be covered with the crushed stone sinter. That is, a concrete fishing reef is manufactured by a conventional method, and thereafter, a crushed stone sinter is fixed to realize ideal characteristics as a fishing reef.

[0037]

The method for producing a concrete fishing reef of the present invention has a feature that an enormous amount of waste crushed stone can be effectively reused. The use of crushed stone waste as a surface covering material for fishing reefs is not only excellent for discarding and reusing crushed stone waste soil, but also making concrete fishing reefs an environment suitable for habitat of marine organisms. Is also excellent. It is excellent for discarding crushed stone waste because it generates a large amount of crushed stone waste and uses it considerably as a concrete fishing reef. Even if there is a use that can effectively use crushed stone waste soil, if its usage is small, it cannot be adopted in practice. Concrete reefs are large in their entirety and are installed on the sea floor. For this reason, when crushed stone waste soil is used for this concrete reef, there is a feature that a huge amount of crushed stone waste soil can be effectively used. Furthermore, advantageously, the thicker the crushed stone slab fixed to the surface of the concrete fishing reef, the more suitable the reef is for the natural environment. There is.

Further, since the crushed stone waste soil used in the method of the present invention is an inorganic powder of fine particles, the crushed stone sinter obtained by firing the same realizes a comfortable environment for marine organisms. Unlike concrete fishing reefs, it does not show strong alkalinity but shows properties similar to natural reefs. Furthermore, the crushed stone sintered plate produced by shaping the crushed stone waste soil and firing it can easily provide innumerable irregularities on the surface when forming. The unevenness of the crushed stone slab makes the surface of the concrete reef more comfortable for marine organisms. Furthermore,
Crushed stone waste soil contains components that are colored when fired, such as iron. Therefore, the crushed stone sintered plate does not become unnatural white like a concrete fishing reef. Colored close to the natural reef.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a concrete fishing reef manufactured by the method of the present invention.

FIG. 2 is a perspective view showing the crushed stone sintered plate shown in FIG. 1;

FIG. 3 is a perspective view showing an example of a base formed from crushed clay.

FIG. 4 is a cross-sectional view showing an example of a base formed from crushed clay.

FIG. 5 is an enlarged sectional view showing a state in which a crushed stone plate is temporarily fixed to a formwork.

FIG. 6 is a sectional view showing a step of temporarily fixing a crushed stone sintered plate to a formwork.

FIG. 7 is a sectional view showing a step of placing ready-mixed concrete on a formwork.

FIG. 8 is a cross-sectional view showing a state in which the upper surface of the molding chamber of the mold is closed with a lid plate.

FIG. 9 is a cross-sectional view showing a step of removing a concrete reef from a formwork.

FIG. 10 is a sectional view showing a step of removing a concrete reef from a formwork.

FIG. 11 is a perspective view showing an example of another concrete fishing reef manufactured by the method of the present invention.

FIG. 12 is a sectional view showing a step of temporarily fixing a crushed stone plate to a mold by a method according to another embodiment of the present invention.

FIG. 13 is a sectional view showing a step of placing ready-mixed concrete into a formwork by a method according to another embodiment of the present invention.

FIG. 14 is a cross-sectional view showing a state where the upper surface of a molding chamber of a mold is closed with a lid plate by a method according to another embodiment of the present invention.

FIG. 15 is a sectional view showing a step of removing a concrete fishing reef from a formwork by a method according to another embodiment of the present invention.

FIG. 16 is a sectional view showing a step of releasing a concrete fishing reef from a formwork by a method according to another embodiment of the present invention.

FIG. 17 is an enlarged cross-sectional view showing a bonding surface of a structure in which a crushed stone slab is bonded to a surface of a concrete fishing reef with an adhesive.

FIG. 18 is an enlarged sectional view of a main part showing a structure for fixing a crushed stone slab to the surface of a concrete fishing reef via a fixture.

[Explanation of symbols]

1 ... crushed stone sintered plate 2 ... formwork 2A ... molding room 2B ...
Cover plate 2C ... male type 2D ... female type 3 ... through hole 4 ... stop pin 5 ... flange 6 ... breaking groove 7 ... wedge 8 ... slit 9 ... locking hole 10 ... fresh concrete 11 ... concrete fishing reef 12 ... adhesive 13 ... Anchor bolt 14 ... Fixing hole 15 ... Fixed cylinder 16 ... Base 17 ... Recess 18 ... Unevenness

Claims (2)

(57) [Claims] 1. A step of forming a crushed clay by adjusting the water content to a value capable of forming waste crushed stone, forming the crushed clay into a shape along the surface of a fishing reef, and sintering the formed crushed clay to sinter the crushed stone. A step of forming a plate (1); a step of temporarily fixing the crushed stone sintered plate (1) to a concrete form (2) for forming a concrete fishing reef (11); and a step of temporarily fixing the crushed stone sintered plate (1). A step of placing ready-mixed concrete (10) on the formed formwork (2) and inserting and fixing the crushed stone slab (1) on the surface of the fishing reef; Removing the reef from the formwork (2). 2. A step of forming a crushed clay by adjusting the moisture content to a value capable of forming the crushed stone waste, forming the crushed clay into a predetermined shape, and sintering the formed crushed clay to form a crushed stone sintered plate (1). ), And the step of bonding the crushed stone slab (1) to the surface of a fishing reef having concrete in a predetermined shape using an adhesive (12), or fixing through a fixture. A method for producing a concrete fishing reef.