Fabricated cement-based material thin-wall structure net cage and construction method thereof

Abstract

The invention discloses a fabricated cement-based material thin-wall structure net cage and a construction method thereof.The fabricated cement-based material thin-wall structure net cage comprises a floating body, a netting and a supporting structure, the floating body is of a hollow structure made of a laminated cement base material, the laminated cement base material comprises cement mortar, a three-dimensional synthetic fiber mesh A and a metal mesh B, and the three-dimensional synthetic fiber mesh A and the metal mesh B are preset in a mold; the three-dimensional synthetic fiber mesh A is located on the side, close to the outer surface, of the interior of the laminated cement thin wall in a single-layer mode, the metal mesh B is located on the side, close to the interior, of the interior of the laminated cement thin wall in a multi-layer mode, a mold is filled with the cement mortar in the forming process, the cement mortar and the three-dimensional synthetic fiber mesh A are compounded into a whole, and therefore the protective layer is formed. The supporting structure is arranged at the bottom of the floating body, the netting is fixed on the supporting structure, and a stable culture area can be maintained under ocean current so as to ensure that the net cage can maintain enough culture water under large ocean current. The method has excellent marine environment durability and aquaculture water body stability.

Description

Technical Field

[0001] The present invention relates to the technical field of marine aquaculture, and in particular to an assembled cement-based material thin-wall structure cage and a construction method thereof. Background Art

[0002] At present, the cages widely used in my country's marine ranches are gravity-type high-density polyethylene plastic (HDPE) cages. The cages are flexible in form, easy to install, economical, heat-resistant, cold-resistant, flexible and wear-resistant. The float of the cage is also the main structural component, providing buoyancy for the entire cage, and the aquaculture water of the cage is surrounded by the net and weight block at the bottom of the high-density polyethylene float by gravity. In an environment with a large current velocity, the aquaculture water of this cage has a weak ability to resist deformation. The net in the ocean current is prone to slanting, curling, and wrinkling when impacted by the ocean current, which in turn causes the aquaculture water to shrink, the activity space of the aquaculture organisms to be limited, and the crowding and collision between marine organisms to increase, resulting in a decrease in marine aquaculture yields.

[0003] In recent years, cement-based materials have been gradually used to build aquaculture cages due to their low cost and good durability. However, cement-based cages have not been widely used. The main reasons are: ordinary reinforced concrete or FRP reinforced concrete cages are bulky and difficult to carry out aquaculture operations such as towing and lifting; and cages built with ultra-high performance concrete (UHPC) are very common because of the chopped steel fibers used in UHPC. In addition, the steel fibers inside UHPC easily form a connected network. Therefore, this type of cement-based cage using chopped steel fibers also has durability risks due to electrochemical corrosion.

[0004] In order to make full use of the abundant high-velocity marine aquaculture resources in my country's coastal areas, and at the same time, better solve the problems of bulky cement-based cage structures and surface corrosion, it is urgent to develop thin-walled, lightweight cement-based cages that are suitable for high-velocity marine environments and have excellent durability in marine environments. Summary of the invention

[0005] In view of the above-mentioned prior art, the present invention provides an assembled cement-based material thin-wall structure cage and a construction method thereof, which has excellent durability in marine environment and stability of aquaculture water.

[0006] To achieve the above object, the technical solution of the embodiment of the present invention is implemented as follows: A fabricated cement-based thin-walled structure cage comprises a buoy, a net and a supporting structure, wherein the buoy is a hollow structure made of a laminated cement substrate, the laminated cement substrate comprises cement mortar and a three-dimensional fiber mesh A and a metal mesh B cast inside the cement mortar, the three-dimensional fiber mesh A is located on the outer side of the laminated cement substrate, and the metal mesh B is located on the inner side of the laminated cement substrate; during the molding process, the cement mortar fills the mold and is composited with the three-dimensional fiber mesh A to form a protective layer for the metal mesh B; the supporting structure is arranged at the bottom of the buoy, the net is fixed on the supporting structure, and can maintain a stable aquaculture area under the ocean current.

[0007] Furthermore, the three-dimensional fiber mesh A is a three-dimensional synthetic fiber fabric mesh, and the metal mesh B includes at least a first metal mesh and a second metal mesh, and the mesh number of the first metal mesh is smaller than the mesh number of the second metal mesh.

[0008] Furthermore, the laminated cement substrate also includes a three-dimensional fiber mesh C, which is a three-dimensional synthetic fiber fabric mesh sheet. The three-dimensional fiber mesh C is attached to the inner surface of the hollow structure made of the laminated cement substrate, and the three-dimensional fiber mesh C is dipped in a waterproof material, which is polyurea.

[0009] Furthermore, the inner cavity of the floating body is provided with reinforcing ribs, and the reinforcing ribs include a metal mesh D located inside the metal mesh B and steel bars, and the steel bars are located between the metal mesh B and the metal mesh D.

[0010] Furthermore, the supporting structure includes a supporting frame fixed below the floating body, the net is fixed on the supporting frame, the supporting frame is made of glass fiber reinforced plastic or carbon fiber reinforced plastic, and the net encloses a breeding area.

[0011] Furthermore, the support frame includes a support rod and a counterweight block, the upper end of the support rod is inserted into a hole reserved at the bottom edge of the floating body to be fixed, and the counterweight block is provided at the lower end of the support rod; the bottoms of the support rods are connected to each other by transverse connecting rods, and the connecting rods are connecting rods made of glass fiber reinforced plastic or carbon fiber reinforced plastic; the net surrounds the support frame therein; the floating body and / or the supporting structure is provided with an anchoring rope, and the anchoring rope is connected to a fixed anchor.

[0012] Furthermore, the floating body is composed of a plurality of prefabricated cylinders made of laminated cement substrate, both ends of the prefabricated cylinders are open, the tops of two adjacent prefabricated cylinders are interconnected by a bent first prefabricated plate, a prefabricated ring beam is provided at the bottom of the floating body, the prefabricated ring beam is connected to the prefabricated cylinders, the bottoms of two adjacent prefabricated cylinders are interconnected by a bent second prefabricated plate, the second prefabricated plate is connected to the prefabricated ring beam, and the first prefabricated plate and the second prefabricated plate cover the joints of the two adjacent prefabricated cylinders.

[0013] A method for constructing an assembled cement-based thin-walled structure box comprises the following steps: S1. Fix the three-dimensional fiber mesh A and the metal mesh B into a fiber mesh cage using plastic cards according to a preset order and interval, and then fill the fiber mesh cage into a mold; S2, pouring the prepared cement mortar into the mold, and with a certain vibration, so that the cement mortar fills and penetrates into the gap between the mold and the fiber mesh cage to form a prefabricated cylinder; S3, sealing both ends of the prefabricated cylinder, and connecting the ends of the prefabricated cylinder one by one to form a closed quadrilateral or polygonal floating body composed of multiple compartments; S4. Install the support structure and the net below the floating body.

[0014] Furthermore, in the step S2, the ends of the steel bars extending from the ends of adjacent prefabricated cylinders are overlapped with each other, and the ends of the overlapping steel bars are welded, and finally covered with cement mortar in a wet connection manner; the tops of the two adjacent prefabricated cylinders are connected by using a bent first prefabricated plate, and the bottoms of the two adjacent prefabricated cylinders are connected by using a bent second prefabricated plate.

[0015] Furthermore, in the step S2, after the prefabricated cylinder is formed, the three-dimensional fiber mesh C impregnated with polyurea waterproof coating is pasted to the inner surface of the cavity of the prefabricated cylinder, smoothed and dried, and then the prefabricated cylinders are spliced ​​to form the floating body.

[0016] The beneficial effects of the present invention are: (1) During the cement mortar molding process, a "micro-protective layer" is formed at the location of the three-dimensional fiber mesh A, which can prevent chloride ions in seawater from diffusing and penetrating into the thin-walled structure, protect the steel fiber mesh and steel bars inside the structure, control the formation of surface micro-cracks, and prevent the exposure of the steel fiber mesh. This structure has better durability in the marine environment than the existing high-density polyethylene material.

[0017] (2) Metal mesh with variable mesh size is used for stacking reinforcement to obtain a high-strength and high-toughness cement-based thin-walled floating body, which has the characteristics of matching the structural force with the distribution of the reinforcement body and higher reinforcement efficiency. Therefore, it has greater advantages in mechanical properties than the existing high-density polyethylene structure.

[0018] (3) The present invention provides a new type of cage structural support system made of glass fiber reinforced plastic or carbon fiber reinforced plastic, which is both rigid and flexible. It has both supporting and buffering functions, so that the cage has the ability to maintain the necessary aquaculture water in high-velocity sea areas and carry out normal marine aquaculture. The buoyancy generated by the float of the present invention is sufficient to bear the dead weight of each component and the load of temporary loads such as operating personnel and fish feed, maintenance items, etc., and can also provide buoyancy reserves for leisure activities such as fishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of an assembled cement-based thin-walled structure box in an embodiment of the present application; Figure 2 This is a schematic diagram of the cross-sectional structure of the floating body in the embodiment of the present application; Figure 3 This is a schematic diagram of the partial structure of the floating body in the embodiment of the present application; Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of AA; Description of Figure Numbers: 1. Floating body; 3. Three-dimensional fiber mesh A; 4. Metal mesh B; 5. First metal mesh; 6. Second metal mesh; 7. Three-dimensional fiber mesh C; 8. Waterproof material; 9. Metal mesh D; 10. Steel bars; 12. Net; 13. Support rod; 14. Counterweight; 15. Connecting rod; 16. Anchor rope; 17. Fixed anchor; 18. Prefabricated cylinder; 19. First prefabricated board; 20. Prefabricated ring beam; 21. Second prefabricated board; 22. Strengthening ribs. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further elaborated in detail below in conjunction with the drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. In the following description, the expression "some embodiments" is related to a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0021] It should be further noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "inner", "outer", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0022] Please refer to the attached Figures 1 to 4 The present application provides an assembled cement-based material thin-walled structure net cage, including a floating body 1, a netting 12 and a support structure. The floating body 1 is a hollow structure made of laminated cement base material. The laminated cement base material includes cement mortar and three-dimensional fiber mesh A3 and metal mesh B4 cast inside the cement mortar. The three-dimensional fiber mesh A3 is located on the outer side of the laminated cement base material in a single-layer form, and the metal mesh B4 is located on the inner side of the laminated cement base material. During the molding process of the cement mortar, a protective layer is formed at the position where the three-dimensional fiber mesh A3 is located. During the molding process of the cement mortar, the mold is filled and combined with the three-dimensional fiber mesh A3 to form a protective layer for the metal mesh B. The support structure is arranged at the bottom of the floating body 1, and the netting is fixed on the support structure and can maintain a stable aquaculture area under ocean currents.

[0023] The floating body 1 is a hollow structure made of laminated cement base material, and its overall shape is a rectangle with a hole in the middle. The thickness of the four walls of the floating body 1 is about 5-8 cm thin wall. The laminated cement base material includes cement mortar and three-dimensional fiber mesh A3 and metal mesh B4 cast inside the cement mortar. The three-dimensional fiber mesh A3 is located on the outer side of the laminated cement base material, and the metal mesh B4 is located on the inner side of the laminated cement base material. During the molding process of the cement mortar, a "micro-protective layer" is formed at the position where the three-dimensional fiber mesh A3 is located, which can prevent the diffusion and penetration of chloride ions in seawater into the thin-walled structure, control the formation of surface micro-cracks, and also block the exposure of the steel fiber mesh.

[0024] Preferably, the metal mesh B4 can be made of a wire mesh or a steel fiber mesh. The metal mesh B4 inside the thin wall can be arranged in multiple layers, and the spacing between the multiple layers of metal mesh B4 can be adjusted according to the stress condition of the thin wall and fixed with plastic cards. The bidirectional tension near the inner surface of the support structure and the thin wall of the floating body 1 is relatively large, so a relatively dense laminated wire mesh is arranged there. In the middle position in the thickness direction of the thin wall, that is, near the neutral plane, fewer wire meshes are arranged, and it will be very convenient to pour and form the subsequent high-strength mortar mixture from this place.

[0025] The synthetic fiber mesh fabric and the steel wire mesh can be formed by overlapping, separating and fixing, which can not only improve the fiber reinforcement efficiency, but also provide a protective layer for the steel wire mesh to avoid exposure of the steel fiber. This high-strength and high-toughness cement-based material thin-walled float 1 can reduce the structural weight while improving durability. The present invention not only provides a new type of cage structure system that is both rigid and flexible, so that it can adapt to normal marine aquaculture in high-velocity waters; it also manufactures a strong and ultra-thin float 1 through new micro-structure reinforcement technology to improve the load-bearing capacity and structural durability of the float 1. The buoyancy generated by the float 1 of the present invention is sufficient to bear the dead weight of each component and the load of temporary loads such as operating personnel and fish feed, maintenance items, etc., and can also provide buoyancy reserves for leisure activities such as fishing.

[0026] Compared with the prior art, which simply places steel bars or steel mesh in the cement matrix, there is an essential difference. The prior art simply sets steel bars to reinforce the components, and the cement matrix is ​​still brittle. Although its overall bearing capacity will increase for a period of time, it is easy to break locally under the action of wind and wave currents in the ocean, which then causes the internal steel bars to rust and then cause structural damage. The metal mesh B4 of the present invention changes the properties at the micro-structure level and the material level. The application of other fiber meshes also has specific significance and functional expectations, which is aimed at improving the flexibility of the cement matrix, thereby greatly improving the impact resistance.

[0027] Near the surface of the laminated cement-based component of the present invention, a dense "micro-protective layer" is formed by overlapping a three-dimensional fabric with a steel mesh, and then filled with cement slurry. This micro-protective layer is used to isolate and protect the steel mesh or steel fiber, which is beneficial to the durability of marine components and has good anti-seepage, anti-cracking and anti-corrosion effects. This is an important innovation in the field of ultra-high performance cement-based material systems for marine engineering in terms of improving structural durability. The traditional protective layer is for steel bars, usually with a thickness of several centimeters, while the "micro-protective layer" here is only a few millimeters thick, achieving a true thin-wall effect.

[0028] The grid sheet of the present invention does not follow a fixed equidistant arrangement pattern, but is flexibly set according to the specific stress distribution and marine engineering protection requirements. This design idea aims to achieve a more scientific and reasonable structural layout and improve the fiber reinforcement efficiency to meet the performance requirements in different application scenarios.

[0029] Specifically, the three-dimensional fiber mesh A3 is a three-dimensional synthetic fiber fabric mesh, and the metal mesh B4 includes at least a first metal mesh 5 and a second metal mesh 6, and the mesh number of the first metal mesh 5 is smaller than the mesh number of the second metal mesh 6. Preferably, the metal mesh B4 includes several layers of metal meshes, which are the first metal mesh B1, the second metal mesh B2, the third metal mesh B3, ... the Nth metal mesh B4 from the inside to the outside.n , Nth metal mesh B n The mesh number is smaller than that of the N+1th metal mesh B n+1 The number of meshes.

[0030] In the side wall, the "synthetic fiber mesh + dense steel wire mesh + sparse steel wire mesh" superimposed structure is parallel to the surface. The synthetic fiber mesh is in the outermost layer of the cement thin wall. The surface thin layer formed by the synthetic fiber mesh and the cement mortar is equivalent to the "micro-protective layer" of the steel wire mesh in the thin-wall structure, which can prevent the chloride ions in the seawater from diffusing and penetrating into the thin-wall structure, control the formation of surface micro-cracks, and prevent the steel fiber mesh from being exposed. The water-facing surface of the side wall of the floating body 1 is susceptible to the pressure and impact of the seawater. In the present invention, the back of the water-facing surface of the floating body 1 is subjected to tensile stress, that is, the inner surface is subjected to tensile stress. The present invention can effectively resist the stress damage borne by the center position of the surface.

[0031] Specifically, the laminated cement substrate further includes a three-dimensional fiber mesh C7, which is a three-dimensional synthetic fiber fabric mesh sheet. The three-dimensional fiber mesh C7 is located on the inner surface of the hollow structure made of the laminated cement substrate, and the three-dimensional fiber mesh C7 is dip-coated with a waterproof material 8, which is polyurea. A layer of 2-5 mm thick three-dimensional fiber mesh C7 can be pasted on the inside, or the three-dimensional fiber mesh C7 can be fixed in other ways, and then polyurea waterproof coating is applied thereon, so that the coating completely penetrates into the interior of the three-dimensional fiber mesh C7, thereby forming a waterproof layer with a certain thickness, and the waterproof layer has excellent bonding force and deformation ability.

[0032] Specifically, the inner cavity of the floating body 1 is provided with reinforcing ribs 22, and the reinforcing ribs 22 include a metal mesh D9 located inside the metal mesh B4 and steel bars 10, and the steel bars 10 are located between the metal mesh D9 and the metal mesh B4. A plurality of vertical reinforcing ribs 22 are added to the inner wall of the floating body 1, and steel bars 10 are arranged in the reinforcing ribs 22; near the inner surface of the thin wall, multiple layers of laminated metal mesh D9 with smaller spacing are arranged to resist horizontal tensile stress; the tensile stress near the "neutral plane" of the thin wall surface is smaller, so the spacing of the configured steel wire mesh is larger, so that high-strength and high-fluidity cement mortar can be poured in through the gap near the "neutral plane" and fill the internal gaps. Preferably, the metal mesh D9 is a plurality of layers, for example, including a first metal mesh D1, a second metal mesh D2, a third metal mesh D3...the Nth metal mesh D n A single layer of three-dimensional fiber mesh A, several layers of metal mesh B, steel bars and several layers of metal mesh D are formed on the side wall of the reinforcing rib from outside to inside.

[0033] Specifically, the support structure includes a support frame fixed below the floating body 1, the net 12 is wrapped around the support frame, the support frame is made of glass fiber reinforced plastic or carbon fiber reinforced plastic, glass fiber reinforced plastic is called GFRP, carbon fiber reinforced plastic is called CFRP, and the net 12 encloses a breeding area. Marine organisms and the like can be cultured in the breeding area.

[0034] Specifically, the support structure includes a support rod 13 and a counterweight 14. The upper end of the support rod 13 is connected to the bottom of the floating body 1. The lower end of the support rod 13 is provided with the counterweight 14. The net 12 is connected to the support rod 13. The support rod 13 is made of fiber reinforced plastic (FRP) and is cylindrical or cylindrical in shape. The cross-sectional diameter generally does not exceed 5 cm. The upper half of the rod is within a range of about 1m. It is a variable diameter rod with a rod diameter variation range of about 1 cm. The thickness of the rod corresponds to the size of the reserved holes at the edge of the buoy and the edge of the bottom plate ring beam. The rod is fixed to the buoy structure in a wedge-shaped interlocking manner. The support frame is pulled downward by the counterweight 14, so that the support frame is opened to form a stable support structure, thereby fixing the net 12 to form a stable breeding area. The support system constructed by the FRP support rods 13 introduced in the present invention cleverly combines the dual characteristics of rigidity and flexibility, especially in high-velocity sea areas, showing a unique advantage of "buffering" against the impact of ocean currents, greatly improving the stability of the aquaculture cages.

[0035] Specifically, the support structure also includes a connecting rod 15, and the bottom of the support rod 13 is interconnected through a transverse connecting rod 15, and the connecting rod is a connecting rod made of glass fiber reinforced plastic or carbon fiber reinforced plastic; the vertical support rod 13 made of FRP material and the transverse connecting rod 15 made of FRP material at the bottom of the support structure are connected to each other, and together form a net support system. Compared with the rigid support system, the flexible frame has good structural coordination. When impacted by high-speed ocean currents, it can provide a certain buffering effect while ensuring that the aquaculture water body is not lost, thereby ensuring the stability of the main structure of the pontoon. The floating body 1 and / or the support structure are provided with an anchor rope 16, and the anchor rope 16 is connected to the fixed anchor 17; the anchor rope 16 and the fixed anchor 17 are used to fix the support structure to prevent it from being carried away by the water flow. The top of the floating body 1 is provided with a top plate, and the bottom of the floating body 1 is provided with a bottom plate to improve the strength of the floating body 1.

[0036] Specifically, the floating body 1 is composed of a plurality of prefabricated cylinders 18 made of laminated cement substrate, both ends of the prefabricated cylinder 18 are open, the tops of two adjacent prefabricated cylinders 18 are connected to each other through a bent first prefabricated plate 19, a prefabricated ring beam 20 is provided at the bottom of the floating body 1, the prefabricated ring beam 20 is connected to the prefabricated cylinder 18, the bottoms of two adjacent prefabricated cylinders 18 are connected to each other through a bent second prefabricated plate 21, the second prefabricated plate 21 is connected to the prefabricated ring beam 20, and the first prefabricated plate 19 and the second prefabricated plate 21 cover the joints of the two adjacent prefabricated cylinders 18. The prefabricated cylinder 18, the first prefabricated plate 19 and the second prefabricated plate 21 can all be prefabricated in the factory, and after all kinds of prefabricated components are prepared, they enter the assembly station for assembly and connection. The assembly station can be selected to be carried out on a workbench, and the clearance height of the stand should be above 1.5m. If the assembly and connection is carried out on a dry dock, the structure can be floated by releasing water into the dry dock; if the assembly and connection is carried out on the seashore, an airbag roller is required to assist the structure in launching. The assembly and connection process follows the principle of bottom-up and is carried out step by step. The connection between the components is processed by pre-embedded steel bars 10 welding, fiber cement mortar wrapping, and waterproof glue brushing at the joints. After the cement-based material prefabricated parts are assembled, they need to be left to stand for more than 7 days and the air tightness of the cavity should be tested.

[0037] A method for constructing an assembled cement-based thin-walled structure box comprises the following steps: S1, fix the three-dimensional fiber mesh A3 and the metal mesh B4 into a fiber mesh cage with plastic cards according to a preset order and interval, and then fill the fiber mesh cage into the mold; when the metal mesh B4 is multi-layered, for example, including the first metal mesh B1, the second metal mesh B2, the third metal mesh B3... the Nth metal mesh B n , then the first metal mesh B1, the second metal mesh B2, the third metal mesh B3...the Nth metal mesh B n , fixed in sequence.

[0038] S2. Pour the prepared cement mortar into the mold with a certain vibration. During the pouring process of the cement mortar, it is accompanied by a small amplitude vibration to expel the bubbles in the mortar. The cement mortar is filled and infiltrated into the gap between the mold and the fiber mesh cage to form a prefabricated cylinder 18, and the prefabricated cylinder 18 is spliced ​​to form the floating body 1; the mold is poured with high-strength and high-fluidity cement mortar, and the cement mortar flows into the gap at the "neutral surface" and diffuses to both sides, and penetrates into the gap of the outermost three-dimensional fabric. The two are combined to form a dense bonding layer, that is, a "micro-protective layer". The spacing between the mesh in the middle part is larger, so the cement mortar can easily enter the mesh cage from the larger gap and penetrate into the gap between the mold and the fiber mesh. After the cement mortar hardens, it is the process of demolding and curing.

[0039] S3, sealing both ends of the prefabricated cylinder 18, and connecting the ends of the prefabricated cylinder 18 one by one to form a closed quadrilateral or polygonal floating body composed of multiple chambers.

[0040] S4. Install the net and the supporting structure below the floating body 1 to form an integral net cage structure.

[0041] Specifically, in the step S2, the ends of the steel bars 10 extending from the ends of adjacent prefabricated cylinders 18 are overlapped with each other, and the ends of the overlapping steel bars 10 are welded, and finally covered with cement mortar in a wet connection manner; the tops of the two adjacent prefabricated cylinders 18 are connected by using a bent first prefabricated plate 19, and the bottoms of the two adjacent prefabricated cylinders 18 are connected by using a bent second prefabricated plate 21, which not only has the function of connecting the floating body 1, but also has the function of improving the load-bearing capacity of the bottom plate.

[0042] Specifically, in the step S2, after the prefabricated cylinder 18 is formed, the three-dimensional fiber mesh C7 impregnated with polyurea waterproof coating is pasted on the inner surface of the cavity of the prefabricated cylinder 18, smoothed and dried, and then the prefabricated cylinder 18 is spliced ​​to form the floating body. The polyurea waterproof coating is applied thereon, and the coating is completely penetrated into the interior of the three-dimensional fiber mesh C7, thereby forming a waterproof layer with a certain thickness, and the waterproof layer has excellent bonding force and deformation ability.

[0043] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. The protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An assembled cement-based thin-walled structure mesh box, characterized in that: The invention comprises a buoy, a net and a supporting structure. The buoy is a hollow structure made of a laminated cement substrate. The laminated cement substrate comprises cement mortar and a three-dimensional fiber mesh A and a metal mesh B cast inside the cement mortar. The three-dimensional fiber mesh A is located on the outer side of the laminated cement substrate, and the metal mesh B is located on the inner side of the laminated cement substrate. During the molding process, the cement mortar fills the mold and is compounded with the three-dimensional fiber mesh A to form a protective layer for the metal mesh B. The supporting structure is arranged at the bottom of the buoy, and the net is fixed on the supporting structure and can maintain a stable breeding area under the ocean current.

2. The assembled cement-based thin-walled structure mesh box according to claim 1, characterized in that: The three-dimensional fiber mesh A is a three-dimensional synthetic fiber fabric mesh, and the metal mesh B includes at least a first metal mesh and a second metal mesh, wherein the mesh number of the first metal mesh is smaller than the mesh number of the second metal mesh.

3. The assembled cement-based thin-walled structure mesh box according to claim 1, characterized in that: The laminated cement substrate also includes a three-dimensional fiber mesh C, which is a three-dimensional synthetic fiber fabric mesh sheet. The three-dimensional fiber mesh C is attached to the inner surface of the hollow structure made of the laminated cement substrate. The three-dimensional fiber mesh C is dipped with a waterproof material, which is polyurea.

4. The assembled cement-based thin-walled structure mesh box according to claim 1, characterized in that: The inner cavity of the floating body is provided with reinforcing ribs, and the reinforcing ribs include a metal mesh D located inside the metal mesh B and steel bars, and the steel bars are located between the metal mesh B and the metal mesh D.

5. The assembled cement-based thin-walled structure mesh box according to claim 1, characterized in that: The supporting structure comprises a supporting frame fixed under the floating body, the net is fixed on the supporting frame, the supporting frame is made of glass fiber reinforced plastic or carbon fiber reinforced plastic, and the net encloses a breeding area.

6. The assembled cement-based thin-walled structure mesh box according to claim 5, characterized in that: The support frame includes a support rod and a counterweight block, the upper end of the support rod is inserted into a hole reserved at the bottom edge of the floating body to be fixed, and the lower end of the support rod is provided with the counterweight block; the bottoms of the support rods are connected to each other by transverse connecting rods, and the connecting rods are connecting rods made of glass fiber reinforced plastic or carbon fiber reinforced plastic; the net surrounds the support frame therein; the floating body and / or the supporting structure is provided with an anchoring rope, and the anchoring rope is connected to a fixed anchor.

7. The assembled cement-based thin-walled structure mesh box according to claim 1, characterized in that: The floating body is composed of a plurality of prefabricated cylinders made of laminated cement substrate, both ends of the prefabricated cylinders are open, the tops of two adjacent prefabricated cylinders are interconnected by a bent first prefabricated plate, a prefabricated ring beam is provided at the bottom of the floating body, the prefabricated ring beam is connected to the prefabricated cylinders, the bottoms of two adjacent prefabricated cylinders are interconnected by a bent second prefabricated plate, the second prefabricated plate is connected to the prefabricated ring beam, and the first prefabricated plate and the second prefabricated plate cover the joints of the two adjacent prefabricated cylinders.

8. The method for constructing a prefabricated cement-based thin-walled structure mesh box according to claim 1, characterized in that: The following steps are involved: S1. Fix the three-dimensional fiber mesh A and the metal mesh B into a fiber mesh cage using plastic cards according to a preset order and interval, and then fill the fiber mesh cage into a mold; S2, pouring the prepared cement mortar into the mold, and with a certain vibration, so that the cement mortar fills and penetrates into the gap between the mold and the fiber mesh cage to form a prefabricated cylinder; S3, sealing both ends of the prefabricated cylinder, and connecting the ends of the prefabricated cylinder one by one to form a closed quadrilateral or polygonal floating body composed of multiple compartments; S4. Install the support structure and the net below the floating body.

9. The method for constructing a prefabricated cement-based thin-walled structure mesh box according to claim 8, characterized in that: In the step S2, the ends of the steel bars extending from the ends of adjacent prefabricated cylinders are overlapped with each other, and the ends of the overlapping steel bars are welded, and finally covered with cement mortar in a wet connection manner; the tops of the two adjacent prefabricated cylinders are connected by using a bent first prefabricated plate, and the bottoms of the two adjacent prefabricated cylinders are connected by using a bent second prefabricated plate.

10. The method for constructing a prefabricated cement-based thin-walled structure mesh box according to claim 8, characterized in that: In the step S2, after the prefabricated cylinder is formed, the three-dimensional fiber mesh C impregnated with polyurea waterproof coating is pasted to the inner surface of the cavity of the prefabricated cylinder, smoothed and dried, and then the prefabricated cylinders are spliced ​​to form the floating body.

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