Porous artificial reef construction method based on oyster reef repair

Abstract

The invention relates to a porous artificial reef construction method based on oyster reef repair. Comprising the following steps: collecting fresh, complete and pollution-free oyster shells, cleaning, treating, removing impurities, dirt and attached organisms on the surfaces, disinfecting, and airing for later use; a multi-layer staggered cylinder structure is manufactured to serve as a reef body mold, the reef body mold is of a hollow structure, and a steel bar frame is bound in the reef body mold; the stirred concrete is poured into a reef body mold, curing and demolding are carried out, and a formed reef body main body structure is obtained; a layer of special binder is smeared on the surface of the formed reef body main body structure, the air-dried oyster shells are inlaid on the binder on the surface of the reef body one by one, the oyster shells are slightly pressed to make full contact with the binder, and it is ensured that the oyster shells are firmly pasted; after the reef body is constructed, the biological adhesiveness of the reef body is debugged; and transporting the reef body which is debugged to be qualified to a preset oyster reef repairing sea area by using a barge or a crane.

Description

Technical Field

[0001] The invention belongs to the technical field of artificial reefs, and in particular to a method for constructing a porous artificial reef based on oyster reef restoration. Background Art

[0002] Oyster reefs are an aggregate of living oysters, dead oyster shells and other reef organisms, and are one of the important coastal habitats. While providing shelter, foraging, reproduction and growth environments for many marine organisms, oyster reefs also play the role of marine "ecosystem engineers", effectively purifying water quality, reducing shoreline erosion, alleviating marine disasters, and playing an important role in carbon fixation and protecting biodiversity.

[0003] In recent years, due to large-scale overfishing, the drastic decline in the number of oysters has disrupted the balance of the local marine ecosystem, and related fishery resources have also been implicated. The sharp decline in oysters, degraded reefs, reduced fisheries, and unbalanced ecology have formed an interlocking chain reaction. Therefore, my country's oyster reef system is indeed facing serious challenges, and the protection and restoration of oyster reefs is a long way to go. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method for constructing a porous artificial reef based on oyster reef restoration to solve a series of ecological problems caused by the current oyster reef degradation, achieve effective recovery of marine biological resources and balanced reconstruction of the ecosystem.

[0005] The present invention solves the technical problem by adopting the following technical solutions:

[0006] A method for constructing a porous artificial reef based on oyster reef restoration comprises the following steps:

[0007] S1. Collect fresh, complete and uncontaminated oyster shells, wash and process them, remove impurities, dirt and attached organisms on the surface, disinfect them, and dry them for later use;

[0008] S2, making a multi-layer staggered cylindrical structure as a reef mold, wherein the reef mold is a hollow structure, and a steel bar frame is tied inside the reef mold;

[0009] S3, pouring the mixed concrete into the reef body mold, curing, demoulding, and obtaining the formed reef body main structure;

[0010] S3. Apply a layer of special adhesive on the surface of the formed reef main structure, and inlay the dried oyster shells one by one on the adhesive on the surface of the reef, gently press them to make full contact with the adhesive, and ensure that the oyster shells are firmly attached;

[0011] S4. After the reef is constructed, the biological adhesion of the reef is debugged;

[0012] S5. Transport the reefs that have passed the debugging process to the designated oyster reef restoration area by barge or crane.

[0013] Furthermore, the oyster shells are sterilized by ultraviolet irradiation.

[0014] Moreover, when pouring the mixed concrete into the reef mold, the layered pouring and vibration method is adopted to ensure that the concrete is dense inside and free of bubbles and holes. The pouring thickness of each layer is 30-50 cm, and a vibrating rod is used for sufficient vibration to ensure that the concrete is evenly distributed and tightly wraps the steel bars.

[0015] Moreover, the hollow structure of the reef body is made by drilling and cutting to form pores on the wall of the cylinder. The diameter of the pores is 10-50 cm and the spacing between the pores is 30-80 cm.

[0016] Moreover, when curing the reef mold, cover it with a wet cloth or spray water to keep it moist, and keep the concrete surface moist for at least 7 days.

[0017] Furthermore, the adhesive includes epoxy adhesive, polyurethane adhesive or acrylate adhesive.

[0018] Moreover, the density of the inlaid oyster shells is 50-80 oyster shells per square meter of reef surface.

[0019] Moreover, in step S4, the reef is placed in a simulated water pool environment, and plankton, algae spores, and bacteria are added to the simulated water pool. An underwater microscope is used to determine whether the biological attachment positions on the reef surface are uniform. If the attached organisms are unevenly distributed, the surface roughness of the areas without attached organisms or with fewer attached organisms is determined to be lower.

[0020] Furthermore, if the surface roughness of a certain area is determined to be low, the area is polished to increase the roughness or a coating containing a bio-inducing substance is applied to the area to promote the attachment of organisms.

[0021] The advantages and positive effects of the present invention are:

[0022] 1. The present invention uses a carefully designed multi-layer staggered cylindrical structure combined with an internal steel frame to ensure the structural stability of the reef in a complex marine environment and to resist external forces such as water flow impact and wave beating. It also provides a diverse habitat for marine life and promotes the improvement of species richness and diversity.

[0023] 2. The present invention utilizes fresh oyster shells that have been cleaned and disinfected to be embedded on the surface of the reef, giving full play to the characteristics of the rough surface and large surface area of ​​the oyster shells, creating an ideal attachment matrix for oysters and other attached organisms, which is conducive to the rapid repair and reconstruction of oyster reefs, and also provides a certain vertical space for larvae to protect them from sediments and predators.

[0024] 3. The innovative porous structure design of the present invention has scientifically optimized pore size and spacing, allowing water to flow smoothly through the reef, which is not only conducive to removing metabolic waste and maintaining water cleanliness, but also provides fish with suitable spawning and hatching grounds, which has a positive role in promoting the recovery of fishery resources.

[0025] 4. During the construction process, the present invention has strict and reasonable operating requirements for key steps such as concrete pouring, maintenance, and oyster shell inlay, ensuring the quality and performance of the reef. The biological attachment debugging link carried out after the construction is completed can timely discover and solve problems such as uneven biological attachment. Through targeted surface treatment measures, such as grinding to increase roughness or applying biological induction coatings, the reef's attractiveness and carrying capacity for organisms are greatly improved, further enhancing the effect of marine ecological restoration. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention.

[0027] Reference numerals

[0028] 1-main structure of the fish reef, 2-base of the fish reef, 3-oyster shell on the surface of the fish reef, 4-porous structure of the first fish reef, 5-porous structure of the second fish reef. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below through specific examples. The following examples are only illustrative and not restrictive, and the protection scope of the present invention cannot be limited thereto.

[0030] A method for constructing a porous artificial reef based on oyster reef restoration comprises the following steps:

[0031] S1. Collect fresh, complete and uncontaminated oyster shells, wash and process them, remove impurities, dirt and attached organisms on the surface, disinfect them, and dry them for later use;

[0032] S2, making a multi-layer staggered cylindrical structure as a reef mold, wherein the reef mold is a hollow structure, and a steel bar frame is tied inside the reef mold;

[0033] S3, pouring the mixed concrete into the reef body mold, curing, demoulding, and obtaining the formed reef body main structure;

[0034] S3. Apply a layer of special adhesive on the surface of the formed reef main structure, and inlay the dried oyster shells one by one on the adhesive on the surface of the reef, gently press them to make full contact with the adhesive, and ensure that the oyster shells are firmly attached;

[0035] S4. After the reef is constructed, the biological adhesion of the reef is debugged;

[0036] S5. Transport the reefs that have passed the debugging process to the designated oyster reef restoration area by barge or crane.

[0037] The embodiment of the present invention relates to a method for constructing a porous artificial reef based on oyster reef restoration, such as Figure 1 As shown, it includes a fish reef base 2, a fish reef main structure 1, oyster shells 3 on the fish reef surface, a first fish reef porous structure 4, and a second fish reef porous structure 5. The fish reef base 2 is a circular or elliptical structure, the fish reef main structure 1 is a multi-layer cylindrical concrete structure, the fish reef surface 3 is an inlaid oyster shell structure, and the first fish reef porous structure 4 and the second fish reef porous structure 5 are hollow porous structures.

[0038] In view of the specific shallow sea environment of the Bohai Bay and the settlement of fish reefs, the overall structural height of the porous artificial reef body does not exceed 2 meters, and the pore size of the porous structure of the fish reef is approximately between 150 and 800 mm, and the pore size can be randomly designed.

[0039] Work is carried out according to the porous artificial reef construction method of the present invention. First, collect fresh oyster shells from the local waters, disinfect them with ultraviolet light for 30 minutes, remove surface impurities and attached organisms, and then dry them. Make a multi-layer staggered cylindrical reef mold with a height of 1.5 meters. The mold is processed by drilling holes with a pore diameter of 30 cm and a spacing of 50 cm. The steel frame is tied inside. After the high-performance sulfate-resistant concrete is evenly mixed in proportion, it is poured into the mold in layers, each layer is 40 cm thick, and vibrated with a vibrator for 15 minutes to ensure that the concrete is dense. After pouring, cover with a wet cloth for 8 days, and demold to obtain the main structure of the molded reef. Apply epoxy resin adhesive on the surface of the reef, inlay oyster shells at a density of 60 per square meter, and press gently to make it firm.

[0040] Afterwards, the reef was placed in a pool simulating the local marine environment, and plankton, algae spores, and bacteria were added. Underwater microscope observations revealed that some areas at the bottom of the reef had less biological attachment. Testing showed that the surface roughness was low, so the area was polished and coated with a coating containing bio-inducing substances.

[0041] After the commissioning was qualified, the reef was transported to the restoration sea area by a 50-ton barge, and the reef was accurately placed at the predetermined position with the help of a crane, arranged at intervals of 4 meters. After continuous monitoring after the placement, it was found that the oyster reef biological resources in the area had recovered significantly after 6 months, the oyster attachment increased by 30%, the fish species increased by 5, and the water quality was effectively purified, which verified the good effect of the method of the present invention.

[0042] Although the embodiments of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments.

Claims

1. A method for constructing a porous artificial reef based on oyster reef restoration, characterized in that: The steps include: S1. Collect fresh, complete and uncontaminated oyster shells, wash and process them, remove impurities, dirt and attached organisms on the surface, disinfect them, and dry them for later use; S2, making a multi-layer staggered cylindrical structure as a reef mold, wherein the reef mold is a hollow structure, and a steel bar frame is tied inside the reef mold; S3, pouring the mixed concrete into the reef body mold, curing, demoulding, and obtaining the formed reef body main structure; S3. Apply a layer of special adhesive on the surface of the formed reef main structure, and inlay the dried oyster shells one by one on the adhesive on the surface of the reef, gently press them to make full contact with the adhesive, and ensure that the oyster shells are firmly attached; S4. After the reef is constructed, the biological adhesion of the reef is debugged; S5. Transport the reefs that have passed the debugging to the designated oyster reef restoration area by barge or crane.

2. The method for constructing a porous artificial reef based on oyster reef restoration according to claim 1, characterized in that: Oyster shells are sterilized using ultraviolet light.

3. The method for constructing a porous artificial reef based on oyster reef restoration according to claim 2, characterized in that: When pouring the mixed concrete into the reef mold, the layered pouring and vibration method is adopted to ensure that the concrete is dense inside and free of bubbles and holes. The pouring thickness of each layer is 30-50 cm, and a vibrating rod is used to fully vibrate the concrete so that the concrete is evenly distributed and tightly wraps the steel bars.

4. The method for constructing a porous artificial reef based on oyster reef restoration according to claim 3, characterized in that: The hollow structure of the reef body is made by drilling and cutting to form pores on the wall of the cylinder. The diameter of the pores is 10-50cm and the spacing between the pores is 30-80cm.

5. The method for constructing a porous artificial reef based on oyster reef restoration according to claim 4, characterized in that: When curing the reef mold, cover it with a wet cloth or spray water to keep it moist. The curing time is at least 7 days.

6. The method for constructing a porous artificial reef based on oyster reef restoration according to claim 5, characterized in that: The adhesive includes epoxy resin adhesive, polyurethane adhesive or acrylate adhesive.

7. The method for constructing a porous artificial reef based on oyster reef restoration according to claim 6, characterized in that: The density of the inlaid oyster shells is 50-80 oyster shells per square meter of reef surface.

8. The method for constructing a porous artificial reef based on oyster reef restoration according to claim 7, characterized in that: In step S4, the reef is placed in a simulated water pool environment, plankton, algae spores, and bacteria are added to the simulated water pool, and an underwater microscope is used to determine whether the biological attachment positions on the reef surface are uniform. If the attached organisms are unevenly distributed, the surface roughness of the areas without attached organisms or with fewer attached organisms is determined to be lower.

9. The method for constructing a porous artificial reef based on oyster reef restoration according to claim 8, characterized in that: If the surface roughness of a certain area is determined to be low, the area is polished to increase the roughness or a coating containing a bio-inducing substance is applied to the area to promote the attachment of organisms.

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