Method for assembling concrete prefabricated segments of floating body foundation of floating type fan platform

Abstract

The invention discloses a floating type fan platform floating body foundation concrete prefabricated segment assembling method which is characterized in that multiple waterproof sealing structures are mounted on a to-be-mounted concrete prefabricated segment splicing surface, and the waterproof sealing performance of the prefabricated segment splicing surface can be ensured. The trial assembly procedure is carried out before formal assembly, if it is found that the assembly precision exceeds the allowable range, correction can be carried out in time, the assembly precision is guaranteed to the maximum extent, the splicing face of the concrete member is restored to be in the matched pouring state, and it is guaranteed that the splicing seam is qualified. And before trial assembly, the spatial position of the concrete prefabricated segment to be installed is adjusted, and the success rate of trial assembly can be increased. In the step A2, after the splicing surface is uniformly coated with the structural adhesive, the three-dimensional adjusting and assembling trolley carries the concrete prefabricated segment to be installed to move forwards along a forward retreating route, and the retreating axis and the forward moving axis of the three-dimensional adjusting and assembling trolley are kept unchanged; and the spatial position of the to-be-mounted concrete prefabricated segment does not need to be adjusted again even when the structural adhesive is uniformly scraped and coated on the splicing surface.

Description

Technical Field

[0002] The invention relates to the technical field of assembling a floating foundation of a floating wind turbine platform, and in particular to an assembling method of prefabricated concrete segments of a floating foundation of a floating wind turbine platform. Background Art

[0003] As floating wind farms gradually move to deep sea and units become larger, a technology has emerged to obtain floating buoy foundations by splicing prefabricated concrete segments, such as the Chinese patent (publication number: CN116280050A, title: A waterproof foundation structure for offshore assembled concrete floating wind turbines), which includes two downwind short arm segments (OA, OB), an upwind long arm segment (OC) and a center piece. The three concrete arm segments are all prestressed concrete structures, and each concrete arm segment is spliced ​​by several prefabricated concrete segments, which can not only save costs, but also ensure the hardness of the floating buoy foundation.

[0004] There are many commonly used methods for splicing precast segmental beams of bridges. According to the different splicing surfaces of precast segmental beams, the treatment measures can be divided into three types: adhesive bonding, wet bonding, and dry bonding. According to the different segment spatial positioning measures before the prestressing of the precast segmental beams is established, it can be divided into: cantilever assembly method and whole-span assembly method, among which the whole-span assembly method can also be divided into bracket splicing and bridge-building machine splicing method. However, the splicing of precast concrete segments of floating foundations is different from the splicing of precast segmental beams of bridges. It is necessary to consider the structure of the floating foundation and the ultra-high sealing and waterproof performance requirements of the splicing surface. In addition, the assembly accuracy cannot be guaranteed. The above-mentioned splicing methods cannot meet the splicing requirements of precast concrete segments of floating foundations. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method for assembling prefabricated concrete segments of a floating foundation of a floating wind turbine platform that can meet the requirements for splicing prefabricated concrete segments.

[0006] To achieve the above purpose, the technical solution provided by the present invention is: A method for assembling prefabricated concrete segments of a floating foundation of a floating wind turbine platform, comprising: Position the center piece; The precast concrete segment to be installed of the first boom section is hoisted onto the corresponding support bracket fixture, and the transport vehicle then enters the bottom of the support bracket fixture, and after transporting the precast concrete segment to be installed to the center piece splicing surface on the outermost surface or just in front of the splicing surface of the installed precast concrete segment, the transport vehicle exits; Install multiple waterproof sealing structures on the joint surfaces of the precast concrete segments to be installed; Place the precast concrete segment to be installed and its supporting bracket tooling close to the joint surface of the center piece on the outermost surface or the joint surface of the installed precast concrete segment; A temporary tensioning device is used to symmetrically tension the precast concrete segment to be installed and the center piece on the outermost surface or the precast concrete segment that has been installed to the designed preload value for anchoring; After the temporary tensioning is completed, the weight of the precast concrete segment to be installed is borne by the supporting bracket tooling; Apply epoxy sealant to the inner ring rubber groove formed at the joint surface; This cycle is repeated continuously to complete the splicing of all precast concrete segments to be installed in the first boom section; After completing the splicing of all the prefabricated concrete segments to be installed of the first boom section, proceed with the splicing of the prefabricated concrete segments to be installed of the second boom section and the third boom section; After the prefabricated concrete sections to be installed of the first arm section, the second arm section and the third arm section are all spliced, waterproof sealant caulking construction is finally performed on the outer ring rubber grooves formed by all adjacent prefabricated concrete sections to be installed in the first arm section, the second arm section and the third arm section.

[0007] In this technical solution, multiple waterproof sealing structures are installed on the joint surfaces of the prefabricated concrete segments to be installed, which can ensure the waterproof sealing performance of the joint surfaces of the prefabricated segments.

[0008] Further, the centerpiece positioning includes: Conduct ground sample line measurement and drawing; Transport the centerpiece to the designated location; Adjust the center piece axis position, horizontality and elevation according to the ground sample line; Secure the adjusted center piece.

[0009] The center piece is the foundation of the entire floating pontoon foundation. This technical solution can adjust the position of the center piece in combination with the horizontality and elevation by measuring and drawing the ground sample line.

[0010] Further, a waterproof sealing structure is installed on the joint surface of the prefabricated concrete segment to be installed, including a plurality of prestressed pipes, a stop seal gasket, an epoxy structural adhesive, and a waterproof sealing gasket; A plurality of prestressed pipes are evenly distributed along the edge of the precast concrete segment to be installed, and one end of each prestressed pipe is connected to the splicing surface of the precast concrete segment to be installed; The epoxy structural adhesive is laid on the joint surface of the prefabricated concrete segments to be installed and placed on the periphery of the prestressed pipe; The adhesive stop seal washer is sleeved on the prestressed pipe to separate the prestressed pipe from the epoxy structural adhesive; The waterproof sealing pad is arranged between the epoxy structural adhesive and the waterproof sealing adhesive.

[0011] Furthermore, the three-dimensionally adjustable assembly trolley enters the bottom of the support bracket tooling of the precast concrete segment to be installed, and uses the footwork of the three-dimensionally adjustable assembly trolley to push the cylinder to move the precast concrete segment to be installed and its support bracket tooling close to the splicing surface of the center piece on the outermost surface or the splicing surface of the installed precast concrete segment.

[0012] Furthermore, a temporary tensioning device is used to symmetrically tension the precast concrete segments to be installed and the precast concrete segments that have been installed to the designed preload value before anchoring, and trial assembly is also included; The trial assembly process includes: A1. Use a temporary tensioning device to temporarily tension and fix the precast concrete segment to be installed with the precast concrete segment or center piece on the surface, and check whether the joint is qualified. If qualified, the trial assembly is completed. If not, proceed to the next step; A2. The three-dimensionally adjusted assembly trolley carrying the prefabricated concrete segments to be installed moves backward longitudinally. After the splicing surface is evenly coated with epoxy structural adhesive, the three-dimensionally adjusted assembly trolley carrying the prefabricated concrete segments to be installed moves forward.

[0013] In this technical solution, a trial assembly process is carried out before formal assembly. If it is found that the assembly accuracy exceeds the allowable range, it can be corrected in time to ensure the assembly accuracy to the greatest extent, so that the splicing surface of the concrete component is restored to match the state during pouring, ensuring that the splicing is qualified.

[0014] Furthermore, before the trial assembly is carried out, the spatial position of the prefabricated concrete segments to be installed is adjusted to help improve the success rate of the trial assembly.

[0015] Furthermore, the top coordinates of the precast concrete segment to be installed are measured, and combined with the theoretical values ​​of the coordinates, the spatial position of the precast concrete segment to be installed is adjusted by three-dimensionally adjusting the assembly trolley.

[0016] Furthermore, in step A2, after the structural adhesive is evenly applied to the joint surface, the three-dimensionally adjusted assembly trolley carrying the prefabricated concrete segment to be installed moves forward along the previous retreat route, and the axis of the three-dimensionally adjusted assembly trolley for retreating and moving forward remains unchanged, so that the structural adhesive can be evenly applied to the joint surface without the need to adjust the spatial position of the prefabricated concrete segment to be installed again.

[0017] Furthermore, the temporary tensioning device includes a temporary tensioning support and a temporary tensioning rod.

[0018] Furthermore, before the precast concrete segment to be installed and its supporting bracket tooling are brought close to the center piece splicing surface on the outermost surface or the splicing surface of the installed precast concrete segment, a temporary tensioning support is installed into the inner cavity of the corresponding precast concrete segment to be installed.

[0019] Compared with the prior art, the principles and advantages of this technical solution are as follows: 1. Installing multiple waterproof sealing structures on the joint surface of the prefabricated concrete segments to be installed can ensure the waterproof sealing performance of the joint surface of the prefabricated segments.

[0020] 2. A trial assembly process should be carried out before formal assembly. If it is found that the assembly accuracy exceeds the allowable range, it can be corrected in time to ensure the assembly accuracy to the greatest extent, restore the joint surface of the concrete component to match the state during pouring, and ensure that the joints are qualified.

[0021] 3. Before trial assembly, the spatial position of the prefabricated concrete segments to be installed is also adjusted to improve the success rate of the trial assembly.

[0022] 4. In step A2, after the structural adhesive is evenly applied to the joint surface, the three-dimensionally adjusted assembly trolley carrying the precast concrete segment to be installed moves forward along the previous retreat route, and the axis of the three-dimensionally adjusted assembly trolley for retreating and moving forward remains unchanged, so that the structural adhesive can be evenly applied to the joint surface without adjusting the spatial position of the precast concrete segment to be installed again. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the services required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a principle flow chart of a method for assembling prefabricated concrete segments of a floating foundation of a floating wind turbine platform according to the present invention; Figure 2 This is a schematic diagram of the floating foundation of a floating wind turbine platform (A1 is the center piece, A2 is the first arm section, A3 is the second arm section, and A4 is the third arm section); Figure 3 A schematic diagram of a method for assembling precast concrete segments of a floating wind turbine platform buoy foundation of the present invention, wherein a precast concrete segment to be installed and its supporting bracket tooling are placed close to a splicing surface of an installed precast concrete segment (A5 is a precast concrete segment to be installed, A6 is an installed precast concrete segment, A7 is a supporting bracket tooling, A8 is a temporary tensioning support, A9 is a temporary tensioning rod, and A10 is a three-dimensional adjustment assembly trolley); Figure 4 for Figure 3 Sectional view at AA in the middle; Figure 5 for Figure 4A partial enlarged view of point B in the middle (A11 is waterproof sealant, A12 is epoxy sealant, A13 is epoxy structural sealant, A14 is prestressed pipe, A15 is glue-stopping sealing gasket, and A16 is waterproof sealing pad); Figure 6 This is a schematic diagram of splicing the precast concrete segments to be installed with the installed precast concrete segments. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with specific embodiments: like Figures 1 to 6 As shown, a method for assembling prefabricated concrete segments of a floating wind turbine platform buoy foundation described in this embodiment includes the following steps: S1. Position the center piece. The process includes: S1-1. Conduct ground sample line measurement and drawing; S1-2, transport the center piece to the designated location; S1-3. Adjust the center piece axis position, horizontality and elevation according to the ground sample line; S1-4. Fix the adjusted center piece.

[0026] S2, hoisting the first prefabricated concrete segment to be installed of the first arm segment onto the corresponding support bracket fixture, and then the transport vehicle enters the bottom of the support bracket fixture, transports the first prefabricated concrete segment to be installed to the front of the center piece splicing surface on the outermost surface, and then the transport vehicle exits; S3, installing a multiple waterproof sealing structure on the joint surface of the first prefabricated concrete segment to be installed, the multiple waterproof sealing structure comprising multiple prestressed pipes, glue-stopping sealing gaskets, epoxy structural adhesive, and waterproof sealing pads; The plurality of prestressed tubes are evenly distributed along the edge of the first precast concrete segment to be installed, and one end of each prestressed tube is connected to the splicing surface of the first precast concrete segment to be installed; The epoxy structural adhesive is laid on the joint surface of the first precast concrete segment to be installed and placed on the periphery of the prestressed tube; The glue-stopping sealing gasket is put on the prestressed pipe to separate the prestressed pipe from the epoxy structural adhesive; The waterproof sealing pad is arranged between the epoxy structural adhesive and the waterproof sealing adhesive.

[0027] S4, installing a temporary tension support into the inner cavity of the first precast concrete segment to be installed; S5. The three-dimensionally adjustable assembly trolley enters the bottom of the first prefabricated concrete segment support bracket tooling to be installed, and uses the three-dimensionally adjustable assembly trolley's step push cylinder to move the first prefabricated concrete segment to be installed and its support bracket tooling close to the center piece splicing surface.

[0028] S6, measuring the top coordinates of the first precast concrete segment to be installed, and adjusting the spatial position of the first precast concrete segment to be installed by three-dimensionally adjusting the assembly trolley in combination with the theoretical coordinate values; S7, trial assembly, the process includes: S7-1, using a temporary tensioning device (temporary tensioning support and temporary tensioning rod) to temporarily tension and fix the first prefabricated concrete segment to be installed with the center piece, and check whether the joint is qualified. If qualified, the trial assembly is completed and the process directly proceeds to step S8. If unqualified, the process proceeds to S7-2; S7-2, the three-dimensionally adjusted assembly trolley carrying the first prefabricated concrete segment to be installed moves back longitudinally, and after the splicing surface is evenly coated with epoxy structural adhesive, the three-dimensionally adjusted assembly trolley carrying the first prefabricated concrete segment to be installed moves forward along the previous retreat route, and the axis of the three-dimensionally adjusted assembly trolley's retreat and forward movement remains unchanged; S8. Use a temporary tensioning device (temporary tensioning support and temporary tensioning rod) to symmetrically tension the first precast concrete segment to be installed and the center piece to the designed preload value and anchor them; S9, after the temporary tensioning is completed, the weight of the first precast concrete segment to be installed is borne by the supporting bracket tooling; S10, performing epoxy sealant caulking construction on the inner ring rubber groove formed at the joint surface of the first prefabricated concrete segment to be installed; S11, continuously looping steps S2 to S10 (replacing the first precast concrete segment to be installed with other precast concrete segments to be installed), and completing the splicing of all precast concrete segments to be installed of the first arm segment; S12, after completing the splicing of all the prefabricated concrete segments to be installed of the first boom section, the same principle is used to splice the prefabricated concrete segments to be installed of the second boom section and the third boom section; S13, after the prefabricated concrete sections to be installed of the first arm section, the second arm section and the third arm section are spliced, the outer ring rubber grooves formed by all adjacent prefabricated concrete sections to be installed in the first arm section, the second arm section and the third arm section are caulked with waterproof sealant.

[0029] In this embodiment, Installing multiple waterproof sealing structures on the joint surface of the prefabricated concrete segments to be installed can ensure the waterproof sealing performance of the joint surface of the prefabricated segments.

[0030] The center piece is the foundation of the entire floating buoy foundation. In this embodiment, by measuring and drawing the ground sample line, the position of the center piece can be adjusted in combination with the horizontality and elevation.

[0031] A trial assembly process is carried out before formal assembly. If it is found that the assembly accuracy exceeds the allowable range, it can be corrected in time to ensure the assembly accuracy to the greatest extent possible, restore the joint surface of the concrete component to match the state during pouring, and ensure that the joints are qualified.

[0032] After the structural adhesive is evenly applied to the joint surface, the three-dimensionally adjustable assembly trolley carries the prefabricated concrete segment to be installed and moves forward along the previous retreat route. The axis of the three-dimensionally adjustable assembly trolley's retreat and forward movement remains unchanged, so that the structural adhesive can be evenly applied to the joint surface without having to adjust the spatial position of the prefabricated concrete segment to be installed again.

[0033] The supporting bracket tooling adopts double-layer high-rigidity bracket to bear the load, which can achieve no spatial position change of components when the supporting system is converted during the assembly process, completing high-precision splicing construction.

[0034] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all changes made according to the shape and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for assembling prefabricated concrete segments of a floating wind turbine platform buoy foundation, characterized in that: include: Positioning of center piece; The precast concrete segment to be installed of the first boom section is hoisted onto the corresponding support bracket fixture, and the transport vehicle then enters the bottom of the support bracket fixture, and after transporting the precast concrete segment to be installed to the center piece splicing surface on the outermost surface or just in front of the splicing surface of the installed precast concrete segment, the transport vehicle exits; Install multiple waterproof sealing structures on the joint surfaces of the precast concrete segments to be installed; Place the precast concrete segment to be installed and its supporting bracket tooling close to the joint surface of the center piece on the outermost surface or the joint surface of the installed precast concrete segment; A temporary tensioning device is used to symmetrically tension the precast concrete segment to be installed and the center piece on the outermost surface or the precast concrete segment that has been installed to the designed preload value for anchoring; After the temporary tensioning is completed, the weight of the precast concrete segment to be installed is borne by the supporting bracket tooling; Apply epoxy sealant to the inner ring rubber groove formed at the joint surface; This cycle is repeated continuously to complete the splicing of all precast concrete segments to be installed in the first boom section; After completing the splicing of all the prefabricated concrete segments to be installed of the first boom section, proceed with the splicing of the prefabricated concrete segments to be installed of the second boom section and the third boom section; After the prefabricated concrete sections to be installed of the first arm section, the second arm section and the third arm section are all spliced, waterproof sealant caulking construction is finally performed on the outer ring rubber grooves formed by all adjacent prefabricated concrete sections to be installed in the first arm section, the second arm section and the third arm section.

2. A method for assembling prefabricated concrete segments of a floating wind turbine platform buoy foundation according to claim 1, characterized in that: Centerpiece positioning includes: Conduct ground sample line measurement and drawing; Transport the centerpiece to the designated location; Adjust the center piece axis position, horizontality and elevation according to the ground sample line; Secure the adjusted center piece.

3. The method for assembling prefabricated concrete segments of a floating wind turbine platform buoy foundation according to claim 1, characterized in that: Install a waterproof sealing structure on the joint surface of the precast concrete segment to be installed, including multiple prestressed pipes, glue-stopping sealing gaskets, epoxy structural adhesive, and waterproof sealing pads; A plurality of prestressed pipes are evenly distributed along the edge of the precast concrete segment to be installed, and one end of each prestressed pipe is connected to the splicing surface of the precast concrete segment to be installed; The epoxy structural adhesive is laid on the joint surface of the prefabricated concrete segments to be installed and placed on the periphery of the prestressed pipe; The adhesive stop seal washer is sleeved on the prestressed pipe to separate the prestressed pipe from the epoxy structural adhesive; The waterproof sealing pad is arranged between the epoxy structural adhesive and the waterproof sealing adhesive.

4. The method for assembling prefabricated concrete segments of a floating wind turbine platform buoy foundation according to claim 1, characterized in that: The three-dimensionally adjustable assembly trolley enters the bottom of the support bracket tooling of the precast concrete segment to be installed, and uses the footwork of the three-dimensionally adjustable assembly trolley to push the cylinder to move the precast concrete segment to be installed and its support bracket tooling close to the splicing surface of the center piece on the outermost surface or the splicing surface of the installed precast concrete segment.

5. The method for assembling prefabricated concrete segments of a floating wind turbine platform buoy foundation according to claim 3 is characterized in that: Using temporary tensioning devices to symmetrically tension the precast concrete segments to be installed and the installed precast concrete segments to the designed preload value before anchoring, and also including trial assembly; The trial assembly process includes: A1. Use a temporary tensioning device to temporarily tension and fix the precast concrete segment to be installed with the precast concrete segment or center piece on the surface, and check whether the joint is qualified. If qualified, the trial assembly is completed. If not, proceed to the next step; A2. The three-dimensionally adjusted assembly trolley carrying the prefabricated concrete segments to be installed moves backward longitudinally. After the splicing surface is evenly coated with epoxy structural adhesive, the three-dimensionally adjusted assembly trolley carrying the prefabricated concrete segments to be installed moves forward.

6. A method for assembling prefabricated concrete segments of a floating wind turbine platform buoy foundation according to claim 5, characterized in that: Before trial assembly, the spatial position of the precast concrete segments to be installed is also adjusted.

7. A method for assembling prefabricated concrete segments of a floating wind turbine platform buoy foundation according to claim 6, characterized in that: The top coordinates of the precast concrete segment to be installed are measured, and combined with the theoretical values ​​of the coordinates, the spatial position of the precast concrete segment to be installed is adjusted by three-dimensionally adjusting the assembly trolley.

8. The method for assembling prefabricated concrete segments of a floating wind turbine platform buoy foundation according to claim 7, characterized in that: In step A2, after the structural adhesive is evenly applied to the joint surface, the three-dimensionally adjustable assembly trolley carrying the prefabricated concrete segment to be installed moves forward along the previous retreat route, and the axis of the three-dimensionally adjustable assembly trolley for retreating and moving forward remains unchanged.

9. A method for assembling prefabricated concrete segments of a floating wind turbine platform buoy foundation according to any one of claims 1 to 8, characterized in that: The temporary tensioning device includes a temporary tensioning support and a temporary tensioning rod.

10. A method for assembling prefabricated concrete segments of a floating wind turbine platform buoy foundation according to claim 9, characterized in that: Before the precast concrete segment to be installed and its supporting bracket tooling are brought close to the center piece joint surface on the outermost surface or the joint surface of the installed precast concrete segment, a temporary tensioning support is installed into the inner cavity of the corresponding precast concrete segment to be installed.

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