Frp-concrete structure, floating unit, floating platform and construction method

Abstract

In order to overcome the poor durability problem faced by the existing reinforced concrete components used for offshore floating structures, the application provides a FRP-concrete structure, a floating unit, a floating platform and a construction method thereof; the FRP-concrete structure comprises an FRP component, a plurality of shear pin assemblies and a concrete layer, the plurality of shear pin assemblies are arranged in the FRP component, the concrete layer is filled in the FRP component, the shear pin assembly comprises a shear pin and a fiber bundle, one end of the fiber bundle is arranged in the interior of the shear pin, and the end of the fiber bundle away from the shear pin extends out of the shear pin and is connected with the FRP component. The FRP-concrete structure provided by the application has high strength, strong bearing capacity and good durability.

Description

Technical Field

[0001] This invention belongs to the field of marine engineering technology, specifically relating to an FRP-concrete structure, a floating unit, a floating platform, and a construction method thereof. Background Technology

[0002] Currently, humanity faces severe environmental degradation problems such as global warming, rising sea levels, and a shortage of land resources. The development of marine space resources and new marine energy sources has become a key strategic focus for countries worldwide. With the rapid economic development and continuous population growth of my country's coastal cities, the problems of land resource shortages and energy scarcity are becoming increasingly severe. Therefore, coastal cities are forced to turn their attention to the ocean for spatial development.

[0003] The development of floating marine structures holds promise as an effective solution for addressing climate change, resolving urban spatial development issues in coastal areas, and developing marine resources. The marine environment is one of the harshest natural corrosive environments, posing significant challenges to the durability of traditional engineering materials. Existing floating marine structures are typically reinforced concrete components. Seawater, rich in chloride ions, corrodes the reinforcing steel and causes cracks in the concrete layers, resulting in short maintenance cycles and severely impacting the durability of floating marine structures. Therefore, there is an urgent need to develop a more durable floating marine structure. Summary of the Invention

[0004] To address the poor durability of existing reinforced concrete components used in offshore floating structures, this application provides an FRP-concrete structure, a floating unit, a floating platform, and a construction method thereof.

[0005] To address the aforementioned issues, this application provides an FRP-concrete structure comprising an FRP member, a plurality of shear stud assemblies, and a concrete layer. The plurality of shear stud assemblies are disposed within the FRP member, and the concrete layer fills the FRP member. Each shear stud assembly includes a shear stud and a fiber bundle. One end of the fiber bundle is disposed inside the shear stud, and the end of the fiber bundle away from the shear stud extends out of the shear stud and connects to the FRP member.

[0006] Preferably, the FRP component includes a first FRP plate and a second FRP plate, the shear stud is J-shaped, the shear stud includes a bent portion, one end of the bent portion is provided with a straight portion, the bent portion abuts against the first FRP plate, the end of the straight portion away from the bent portion abuts against the second FRP plate, one end of the fiber bundle is disposed inside the straight portion, the end of the fiber bundle away from the straight portion extends out of the straight portion and connects with the second FRP plate; the concrete layer fills the space between the first FRP plate, the second FRP plate and the plurality of shear stud assemblies.

[0007] Preferably, the fiber bundle includes a first part and a second part, the first part being disposed inside the straight portion, the second part extending radially out of the straight portion, and the second part being connected to the second FRP plate;

[0008] The length of the second part is less than the distance between two adjacent shear studs.

[0009] Preferably, the cross-section of the curved portion is arc-shaped, and the diameter of the arc is 4 to 6 times the outer diameter of the straight portion.

[0010] Secondly, this application provides a floating unit, including a planar float and a columnar float, wherein the columnar float is disposed on one side of the planar float, and both the planar float and the columnar float include the FRP-concrete structure described above.

[0011] Thirdly, this application provides a floating platform comprising a plurality of the aforementioned floating units.

[0012] Preferably, the floating platform includes multiple prestressed FRP cables, and multiple reserved holes are provided on both the first FRP plate and the second FRP plate in the planar floating body. Multiple reserved pipes are provided between the first FRP plate and the second FRP plate in the planar floating body. The reserved pipes connect two of the reserved holes, and the prestressed FRP cables pass through the reserved holes and the reserved pipes to connect multiple floating units.

[0013] Fourthly, this application provides a construction method for the aforementioned floating platform, comprising the following steps:

[0014] Obtain multiple second FRP plates with injection holes and reserved holes, obtain multiple first FRP plates with reserved holes, and obtain the shear nail assembly and concrete grout.

[0015] Multiple shear nail assemblies are arranged between the first FRP plate and the second FRP plate, and then concrete grout is injected through the injection hole to obtain multiple columnar floats and multiple planar floats to form a floating unit.

[0016] By using prestressed FRP cables to pass through the reserved holes of the multiple planar floats, the multiple floating units are connected to form a floating platform.

[0017] Preferably, the step of placing the plurality of shear stud assemblies between the first FRP plate and the second FRP plate specifically includes the following steps: positioning the second FRP plate with the shear studs and the fiber bundles and the first FRP plate at a preset position; bonding the bent portion of the shear studs to the first FRP plate; bonding the straight portion of the shear studs to the second FRP plate; and simultaneously bonding the fiber bundles extending from the straight portion and arranged radially to the second FRP plate.

[0018] Preferably, the step of using prestressed FRP cables through the reserved holes of multiple planar floats further includes the following steps: in the preparation of a single planar float, using multiple reserved tubes to connect the reserved holes on opposite sides; using the prestressed FRP cables to pass through the reserved holes and the reserved tubes of the multiple planar floats.

[0019] Compared with existing technologies, the FRP-concrete structure provided in this application has the following main advantages: First, FRP is a material with high specific strength, corrosion resistance, and excellent fatigue performance. Filling the FRP member with a concrete layer fully utilizes the fact that the FRP member is wrapped around the concrete layer on both sides, giving it good corrosion resistance. Second, the shear stud assembly is set inside the FRP member. The shear studs and fiber bundles can better connect the FRP member and the concrete layer. The shear studs replace stirrups, improving the shear resistance of the structure. At the same time, the absence of steel reinforcement avoids the corrosion problem of stainless steel. Third, the FRP member, concrete layer, and shear stud assembly together constitute the load-bearing structure. The FRP-concrete structure has high strength, high load-bearing capacity, and good durability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of an FRP-concrete structure;

[0021] Figure 2 This is a schematic diagram of the second FRP board and shear stud assembly structure;

[0022] Figure 3 This is a schematic diagram of a floating unit structure;

[0023] Figure 4 This is a schematic diagram of a floating platform structure.

[0024] Among them, 1. FRP component; 101. First FRP plate; 102. Second FRP plate; 2. Shear stud; 201. Straight section; 202. Bending section; 3. Fiber bundle; 4. Concrete layer; 5. Floating unit; 501. Planar float; 502. Columnar float; 6. Floating platform. Detailed Implementation

[0025] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0026] like Figure 1-2 The present invention provides an FRP-concrete structure, including an FRP member 1, a plurality of shear stud assemblies and a concrete layer 4. The plurality of shear stud assemblies are disposed within the FRP member 1, and the concrete layer 4 fills the FRP member 1. Each shear stud assembly includes a shear stud 2 and a fiber bundle 3. One end of the fiber bundle 3 is disposed inside the shear stud 2, and the other end of the fiber bundle 3 away from the shear stud 2 extends out of the shear stud 2 and is connected to the FRP member 1.

[0027] It is understood that the concrete layer 4 provided in this application includes at least one of ordinary concrete layer 4, high-performance concrete layer 4, and sea sand self-compacting concrete layer 4. Sea sand self-compacting concrete layer 4 is preferred.

[0028] Specifically, the concrete layer 4 includes a sea sand self-compacting concrete layer 4. When the floating unit 5 formed by the FRP-concrete structure is used in the field of marine engineering, the concrete layer 4 can use natural sea sand instead of river sand to prepare the sea sand self-compacting concrete layer 4, so as to realize the local use of materials for marine engineering construction and solve the problem of severe shortage of river sand.

[0029] Fiber-reinforced polymer (FRP) is a high-performance material with high specific strength, corrosion resistance, and excellent fatigue performance. Constructing a new type of high-performance floating marine structure using FRP and a self-compacting concrete layer (4) made of sea sand will ensure the safety and long service life of my country's marine infrastructure, and is of great significance and engineering value for promoting the green development of my country's marine economy. The FRP material used in FRP component 1 has good durability and can solve the corrosion problems of traditional marine engineering structures.

[0030] Compared with existing technologies, the FRP-concrete structure provided in this application has the following main advantages: First, FRP is a material with high specific strength, corrosion resistance, and excellent fatigue performance. The concrete layer 4 is filled inside the FRP member 1, which fully utilizes the good corrosion resistance of the FRP member 1 wrapped around the concrete layer 4. Second, the shear stud assembly is set inside the FRP member 1. The shear studs 2 and fiber bundles 3 can better connect the FRP member 1 and the concrete layer 4. The shear studs 2 replace the stirrups, improving the shear resistance of the structure. At the same time, the absence of steel reinforcement can avoid the corrosion problem of stainless steel. Third, the FRP member 1, the concrete layer 4, and the shear stud assembly together constitute the load-bearing structure. The FRP-concrete structure has the advantages of high strength, high load-bearing capacity, and good durability.

[0031] The fiber bundle 3 extends from the shear stud 2 at one end away from the shear stud 2 and connects to the FRP member 1. This structure can enhance the connection strength between the FRP member 1 and the concrete layer 4 and prevent relative slippage between the concrete layer 4 and the FRP member 1.

[0032] The FRP-concrete structure provided in this application has the following main applications: First, in marine engineering structures: it can be used in marine engineering for floating structures at sea and infrastructure construction in nearshore engineering. Seawater is directly used to prepare the self-compacting concrete layer of sea sand. The application of FRP ensures the load-bearing capacity and good durability of the composite structure. Second, in promoting engineering technology progress: the research has clear application prospects in marine engineering, and innovation in structural technology can expand the application fields of composite materials.

[0033] It is understood that the materials used in FRP component 1 and shear stud 2 include at least one of GFRP (glass fiber reinforced composite), AFRP (aramid fiber reinforced composite), BFRP (basalt fiber reinforced composite), and CFRP (carbon fiber reinforced composite).

[0034] In some embodiments, the FRP component 1 includes a first FRP plate 101 and a second FRP plate 102, the shear stud 2 is J-shaped, the J-shaped shear stud 2 includes a bent portion 202, one end of the bent portion 202 is provided with a straight portion 201, the bent portion 202 abuts against the first FRP plate 101, the end of the straight portion 201 away from the bent portion 202 abuts against the second FRP plate 102, one end of the fiber bundle 3 is disposed inside the straight portion 201, the end of the fiber bundle 3 away from the straight portion 201 extends out of the straight portion 201 and connects with the second FRP plate 102; the concrete layer 4 fills the space between the first FRP plate 101, the second FRP plate 102 and the plurality of shear stud assemblies.

[0035] like Figure 1As shown, the FRP component 1 includes a first FRP plate 101 and a second FRP plate 102, which are arranged opposite to each other. A plurality of J-shaped shear studs 2 are disposed between the oppositely arranged first FRP plates 101 and 102. It can be understood that the opposite arrangement of the first FRP plates 101 and 102 can be vertically opposite each other with a space between them, or horizontally opposite each other with a space between them. The opposite arrangement of the first FRP plates 101 and 102 can be symmetrical or asymmetrical; this application preferably prefers a symmetrical arrangement of the first FRP plates 101 and 102.

[0036] The shear stud 2 is J-shaped, including a curved portion 202 and a straight portion 201, as shown below. Figure 1 As shown, one end of the curved portion 202 is connected to the straight portion 201, and the arc segment of the curved portion 202 abuts against the first FRP plate 101. The end of the straight portion 201 away from the curved portion 202 abuts against the second FRP plate 102. The shear stud 2 abuts between the first FRP plate 101 and the second FRP plate 102. The shear stud 2 replaces the stirrups, improving the shear resistance of the structure. The curved portion 202 in the shear stud 2 mainly enhances the bond between the shear stud 2 and the concrete layer 4, effectively preventing the shear stud 2 from being pulled out of the concrete layer 4.

[0037] One end of the fiber bundle 3 is disposed inside the straight section 201, and the other end extends out of the straight section 201 and is connected to the second FRP plate 102. The arrangement of the fiber bundle 3 improves the connection strength between the concrete layer 4 and the second FRP plate 102.

[0038] The concrete layer 4 is filled between the first FRP plate 101, the second FRP plate 102 and the plurality of shear stud assemblies, that is, the concrete layer 4 is filled between the first FRP plate 101, the second FRP plate 102, the plurality of shear studs 2 and the plurality of fiber bundles 3, thereby improving the load-bearing capacity of the FRP-concrete structure.

[0039] In some embodiments, the fiber bundle 3 includes a first portion and a second portion, the first portion being disposed inside the straight portion 201, the second portion extending radially out of the straight portion 201, and the second portion being connected to the second FRP plate 102;

[0040] The length of the second part is less than the distance between two adjacent shear studs 2.

[0041] like Figure 2As shown, the first part of the fiber bundle 3 is disposed inside the straight section 201. Preferably, the first part is fixed inside the straight section 201. The fixing method can be bonding or integral curing. In this application, it is preferred that the first part is first placed inside the straight section 201 and then integrally cured to obtain this structure. The second part extends radially out of the straight section 201 and is connected to the second FRP plate 102. That is, the second part is radially arranged on the side of the second FRP plate 102 near the first FRP plate 101. The connection between the second part and the second FRP plate 102 is a fixed connection, such as bonding, or other fixing methods. For bonding, epoxy resin adhesive can be used to increase the connection strength between the fiber bundle 3 and the second FRP plate 102. The radial connection of the second part to the second FRP plate 102 increases the contact area between the fiber bundle 3 and the second FRP plate 102, thereby improving the connection strength between the concrete layer 4 and the FRP plate.

[0042] The length of the second part is less than the distance between two adjacent shear studs 2, which facilitates the radial connection of the second part of the fiber bundle 3 to the second FRP plate 102, while ensuring the connection strength between the shear studs 2 and the FRP plate and reducing costs.

[0043] In some embodiments, the cross-section of the curved portion 202 is arc-shaped, and the diameter of the arc is 4 to 6 times the outer diameter of the straight portion 201.

[0044] like Figure 1 As shown, the cross-section of the curved part 202 is an arc-shaped structure. The curved part 202 is an arc-shaped segment, and the diameter of the arc is the same as the diameter of the arc segment. The diameter of the arc is 4 to 6 times the outer diameter of the straight part 201. The large arc increases the contact area between the curved part 202 and the concrete layer 4, which makes the shear nail 2 bond better to the concrete layer 4 and effectively prevents the shear nail 2 from being pulled out of the concrete layer 4.

[0045] In some embodiments, the second FRP plate 102 is provided with a plurality of injection holes.

[0046] The second FRP plate 102 is provided with multiple injection holes, with two or more injection holes, mainly used for injecting concrete layer 4.

[0047] In some embodiments, the height of the shear stud 2 is equal to the distance between the first FRP plate 101 and the second FRP plate 102; this can effectively maintain the spacing between the first FRP plate 101 and the second FRP plate 102, thereby improving the stability of the spacing between the first FRP plate 101 and the second FRP plate 102.

[0048] Secondly, this application provides a floating unit 5, including a planar float 501 and a columnar float 502, wherein the columnar float 502 is disposed on one side of the planar float 501, and both the planar float 501 and the columnar float 502 include the FRP-concrete structure described above.

[0049] like Figure 3 As shown, the planar float 501 and the columnar float 502 constitute the floating unit 5, with the planar float 501 positioned on the top surface of the columnar float 502. The columnar float 502, located below in the floating unit 5, is designed with compartments to provide sufficient buoyancy to support the planar float 501 above it during construction; furthermore, if the columnar float 502 is damaged, it can be repaired and reused.

[0050] The compartmentalized design during construction refers to dividing the columnar float 502 structure into sections for pouring concrete layers 4, with each section being called a compartment. The compartmentalized design is adopted during construction primarily because if a compartment of the columnar float 502 is damaged, it can be directly repaired, reducing maintenance costs.

[0051] The floating unit 5, planar float 501 and columnar float 502 provided in this application all use the FRP-concrete structure described above. The floating unit 5 has the advantages of good durability, high structural bearing capacity and low construction cost.

[0052] The floating unit 5 is applied to marine engineering and can be used for offshore floating structures and near-shore engineering infrastructure construction. It can directly use seawater to prepare the sea sand self-compacting concrete layer 4, realizing the local use of materials for marine engineering construction and solving the problem of severe shortage of river sand. The application of FRP ensures the load-bearing capacity and good durability of the components, which can solve the problem of poor durability in traditional marine engineering.

[0053] The columnar float 502 in the floating unit 5 has a columnar structure, such as a cylinder or prism. To prevent the structure from sinking due to damage, the planar float 501 and the columnar float 502 can be arranged in separate compartments. This structural arrangement improves the hydrodynamic performance of the floating unit 5, enabling it to float at sea. The planar float 501 can have a cross-section that is square, rectangular, triangular, pentagonal, circular, or hexagonal, among other polygonal structures. In this application, the planar float 501 preferably has a square or rectangular cross-section.

[0054] Thirdly, this application provides a floating platform 6, which includes a plurality of the aforementioned floating units 5.

[0055] The floating platform 6 provided in this application is composed of multiple floating units 5. The floating platform 6 formed is applied in the marine field and has advantages such as good durability, high structural load-bearing capacity and low construction cost.

[0056] The floating platform 6 provided in this application has the following main applications: First, in marine engineering structures: it can be used in marine engineering for offshore floating structures and near-shore engineering infrastructure construction. Seawater is directly used to prepare the self-compacting concrete layer 4 made of sea sand, and the application of FRP ensures the load-bearing capacity and good durability of the composite structure. Second, in promoting engineering technology progress: the research has clear prospects for marine engineering applications, and innovation in structural technology can expand the application fields of composite materials.

[0057] In some embodiments, the floating platform 6 includes multiple prestressed FRP cables, and multiple reserved holes are provided on the first FRP plate 101 and the second FRP plate 102 in the planar floating body 501. Multiple reserved pipes are provided between the first FRP plate 101 and the second FRP plate 102 in the planar floating body 501. The reserved pipes connect two of the reserved holes, and the prestressed FRP cables pass through the reserved holes and the reserved pipes connect to multiple floating units 5.

[0058] Specifically, the floating platform 6 includes multiple floating units 5, each floating unit 5 including a planar float 501 and a columnar float 502, both of which are FRP-concrete structures. Multiple pre-drilled holes and pipes are provided on the first FRP plate 101 and the second FRP plate 102 of the planar float 501, with the pipes connecting two pre-drilled holes. Prestressed FRP cables pass through these pre-drilled holes and pipes in the multiple planar floats 501, connecting them to form the floating platform 6. It is understood that the number and arrangement of the floating units 5 in each floating platform 6 can be set according to actual needs, and this application does not impose any limitations.

[0059] Fourthly, this application provides a construction method for the aforementioned floating platform 6, comprising the following steps:

[0060] A second FRP plate 102 with multiple injection holes and reserved holes is obtained, a first FRP plate 101 with multiple reserved holes is obtained, and shear nail assembly and concrete layer 4 grout are obtained.

[0061] Multiple shear stud assemblies are arranged between the first FRP plate 101 and the second FRP plate 102, and then a planar float 501 is arranged on one side of the columnar float 502 to form a floating unit 5;

[0062] Multiple floating units 5 are connected by passing pre-stressed FRP cables through reserved holes in multiple planar floats 501 to form a floating platform 6.

[0063] The construction method of the floating platform 6 provided in this application uses sea sand self-compacting concrete grout for the concrete layer 4, which is easy to obtain, has low construction cost, simple construction process, and shortens the construction period. The resulting floating platform 6 is applied in the marine field and has the advantages of good durability, high structural load-bearing capacity, and low construction cost.

[0064] In some embodiments, the step of obtaining a second FRP board 102 with multiple injection holes and reserved holes specifically includes the following steps: arranging multiple protrusions on a mold and applying a release agent to the mold surface; then sequentially laying a first release cloth, a single layer or multiple layers of fiberglass cloth, and a second release cloth on the release agent surface; cutting off the first release cloth, the second release cloth, and the fiberglass cloth on the surface of the protrusions; using epoxy resin to bond and seal the cut edges and the layers of cloth at the edges of the FRP board; reserving an opening at each end of the board for each injection to connect a vacuum tube and an injection tube respectively; firstly using a vacuum tube to evacuate between the first and second release cloths, and then using the injection tube to inject the matrix material; while injecting the matrix material, ensuring that the vacuum tube on the other side is working simultaneously to ensure that the matrix can be densely injected into the entire board; the matrix is ​​cured and demolded to form a second FRP board 102 with injection holes and reserved holes.

[0065] Specifically, this application does not limit the material and size of the mold. The mold material can be steel, aluminum, iron, or other metals or alloys. Multiple protrusions are arranged on the mold to facilitate the formation of injection holes or pre-drilled holes. It should be noted that this application does not limit the size of the injection holes and pre-drilled holes; different diameters of injection holes and pre-drilled holes can be selected according to specific needs. A release agent is applied to the mold surface to facilitate subsequent demolding.

[0066] On the surface of the release agent, a first release cloth, a single or multiple layers of fiberglass cloth, and a second release cloth are laid sequentially. The first release cloth must be laid flat, smooth, and without wrinkles. The single or multiple layers of fiberglass cloth must be laid with accurate dimensions and direction, and be flat, without deformation or loose fibers. For multiple layers, each layer must be firmly laid. The second release cloth must be dense and flat. After all layers are laid, the total thickness must not exceed the height of the bump.

[0067] The first release cloth, the second release cloth, and the fiberglass cloth on the surface of the bump are removed. The specific removal method can be cutting or other methods. After the release cloth at the bump is removed, the layer must be kept dense.

[0068] A glue-filling tube and a vacuum tube are arranged on both sides of the layup. First, a vacuum is drawn between the first release fabric, the fiberglass cloth, and the second release fabric using the vacuum tube. Then, the matrix material, including epoxy resin and modified epoxy resin, is poured in using the glue-filling tube. After pouring, the matrix is ​​allowed to cure naturally. After curing, the edge hardness of the second FRP board 102 is tested. Once the hardness meets the standard, demolding begins, starting from the edge. The process is slow and gentle to avoid damaging distortion. After demolding, a second FRP board 102 with a glue-filling hole and a pre-drilled hole is formed.

[0069] The first FRP plate 101 is also prepared according to the above process. It should be noted that no injection holes are required in the preparation of the first FRP plate 101.

[0070] The first FRP plate 101 and the second FRP plate 102 can also be obtained by purchase. Then, holes are drilled in the first FRP plate 101 using tools to form reserved holes; similarly, holes are also drilled in the second FRP plate 102 using tools to form reserved holes and injection holes. Drilling with tools is existing technology and will not be described in detail here.

[0071] In some embodiments, the process of placing a plurality of shear stud assemblies between the first FRP plate 101 and the second FRP plate 102, and then injecting concrete grout 4 through the injection holes to obtain a plurality of columnar floats 502 and a plurality of planar floats 501, and then placing the planar floats 501 on one side of the columnar floats 502 to form a floating unit 5, specifically includes the following steps: positioning the second FRP plate 102 with shear studs 2 and fiber bundles 3 and the first FRP plate 101 at a preset position; bonding the bent portion 202 of the shear studs 2 to the first FRP plate 101; bonding the straight portion 201 of the shear studs 2 to the second FRP plate 102; and simultaneously bonding the radially extending fiber bundles 3 extending from the straight portion 201 to the second FRP plate 102. It is understood that adhesives, epoxy resin adhesives, etc., can be used for bonding; epoxy resin adhesive is preferred in this application.

[0072] Afterwards, the concrete layer 4 grout, which has sufficient fluidity, is pre-mixed and then injected through the injection hole on the second FRP plate 102 to form a columnar float 502 and a planar float 501.

[0073] It should be noted that the columnar float 502 and the planar float 501 are constructed in stages. First, the lower columnar float 502 is constructed using a compartmentalized construction method. During this stage, the columnar float 502 has an opening at the top. Concrete grout for the fourth layer is pumped via a pump truck along multiple pipes. These pipes first pass through the upper opening of the columnar float 502, then through the interior of the columnar float 502, and are inserted into the lower grouting holes, dividing the columnar float 502 into multiple compartments. Grouting begins in the bottom compartment and continues from bottom to top. Next, the upper planar float 501 is constructed above the columnar float 502. The grouting of the planar float 501 is the same as that of the columnar float 502, also from bottom to top. It should be noted that... Figure 3 As shown, the columnar float 502 and the planar float 501 share the same FRP plate; after the bottom and sides are poured, the top is poured. After the concrete layer 4 has cured and formed, FRP cloth can be pasted onto the pouring hole to make its inner wall a whole.

[0074] In some embodiments, the step of using prestressed FRP cables through the reserved holes of multiple planar floats 501 specifically includes the following steps: in the preparation of a single planar float 501, multiple reserved tubes are used to connect the reserved holes on opposite sides; then, prestressed FRP cables are used to pass through the reserved holes and the reserved tubes of the multiple planar floats 501.

[0075] During the construction of a single planar float 501, multiple pre-reserved pipes are used on the sides of the planar float 501 to connect the pre-reserved holes of multiple first FRP plates 101 and / or multiple second FRP plates 102 on opposite sides for the passage of prestressed FRP cables. For the fabrication of the floating platform 6, prestressed FRP cables are passed through the pre-reserved holes and pre-reserved pipes of the multiple planar floats 501 to connect the multiple planar floats 501, thereby connecting the multiple floating units 5 to form the floating platform 6. It should be noted that multiple pre-reserved pipes can be set within a single planar float 501 in a single direction parallel to the long side of the top surface of the planar float 501, or multiple pre-reserved pipes can be set in directions parallel to both the long and short sides of the top surface of the planar float 501, or multiple pre-reserved pipes in other directions. This application does not limit the specific direction and the arrangement can be based on actual needs.

[0076] The specific construction method is as follows: Select a period of calm sea conditions, position multiple floating units 5 in the working sea area, and align the holes of adjacent modules with the pre-drilled holes on the opposite sides of the planar float 501 of each floating unit 5. Then, pass the prestressed FRP cable through the pre-drilled holes and pipes, and use jacks to pre-tension the prestressed FRP cable to a sufficient tension so that the adjacent modules can fit tightly together. After all the pre-drilled holes on a plane are installed with prestressed FRP cables and tensioned in place, they are then anchored in sequence to form a stable pre-tension force. Repeat the above operation until the planar float 501 of the floating unit 5 is connected to each side, so that several floating units 5 finally form an integral floating platform 6.

[0077] Prestressed FRP cables are passed through the reserved tubes in a single floating unit, and then adjacent floating units are tightly attached together. At the same time, prestressed FRP cables are used and tensioned into place before being anchored in sequence to form a stable preload, so that multiple floating units 5 are connected to form an integral floating platform 6. The construction process is simple and easy to implement.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An FRP-concrete structure, characterized in that, The device includes an FRP component, multiple shear stud assemblies, and a concrete layer. The multiple shear stud assemblies are disposed within the FRP component, and the concrete layer fills the FRP component. Each shear stud assembly includes a shear stud and a fiber bundle. One end of the fiber bundle is disposed inside the shear stud, and the other end of the fiber bundle away from the shear stud extends out of the shear stud and connects to the FRP component. The FRP component includes a first FRP plate and a second FRP plate. The shear stud is J-shaped and includes a bent portion. One end of the bent portion has a straight portion. The bent portion abuts against the first FRP plate, and the end of the straight portion away from the bent portion abuts against the second FRP plate. One end of the fiber bundle is disposed inside the straight portion, and the end of the fiber bundle away from the straight portion extends out of the straight portion and connects to the second FRP plate. The concrete layer fills the space between the first FRP plate, the second FRP plate, and the plurality of shear stud assemblies.

2. The FRP-concrete structure according to claim 1, characterized in that, The fiber bundle includes a first part and a second part. The first part is disposed inside the straight portion, and the second part extends radially out of the straight portion. The second part is connected to the second FRP plate. The length of the second part is less than the distance between two adjacent shear studs.

3. The FRP-concrete structure according to claim 1, characterized in that, The cross-section of the curved portion is arc-shaped, and the diameter of the arc is 4 to 6 times the outer diameter of the straight portion.

4. A floating unit, characterized in that, It includes a planar floating body and a columnar floating body, wherein the columnar floating body is disposed on one side of the planar floating body, and both the planar floating body and the columnar floating body include the FRP-concrete structure according to any one of claims 1-3.

5. A floating platform, characterized in that, It includes multiple floating units as described in claim 4.

6. The floating platform according to claim 5, characterized in that, The floating platform includes multiple prestressed FRP cables. Multiple reserved holes are provided on the first FRP plate and the second FRP plate in the planar floating body. Multiple reserved pipes are provided between the first FRP plate and the second FRP plate in the planar floating body. The reserved pipes connect two of the reserved holes. The prestressed FRP cables pass through the reserved holes and the reserved pipes to connect multiple floating units.

7. A construction method for the floating platform according to claim 5 or 6, characterized in that, Includes the following steps: Obtain multiple second FRP plates with injection holes and reserved holes, obtain multiple first FRP plates with reserved holes, and obtain the shear nail assembly and concrete grout. Multiple shear nail assemblies are arranged between the first FRP plate and the second FRP plate, and then concrete grout is injected through the injection hole to obtain multiple columnar floats and multiple planar floats to form a floating unit. By using prestressed FRP cables to pass through the reserved holes of the multiple planar floats, the multiple floating units are connected to form a floating platform.

8. The construction method of the floating platform according to claim 7, characterized in that, The step of placing multiple shear stud assemblies between the first FRP plate and the second FRP plate specifically includes the following steps: positioning the second FRP plate with the shear studs and the fiber bundles and the first FRP plate at a preset position; bonding the bent portion of the shear studs to the first FRP plate; bonding the straight portion of the shear studs to the second FRP plate; and simultaneously bonding the fiber bundles extending from the straight portion and arranged radially to the second FRP plate.

9. The construction method of the floating platform according to claim 7, characterized in that, The step of using prestressed FRP cables through pre-drilled holes in multiple planar floats further includes the following steps: in the preparation of a single planar float, using multiple pre-drilled tubes to connect the pre-drilled holes on opposite sides; and using the prestressed FRP cables to pass through the pre-drilled holes and pre-drilled tubes in the multiple planar floats.

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