Construction method of tidal current energy power station structure

Abstract

The invention relates to a construction method of a tidal current energy power station structure. The construction method comprises the following steps that S1, a jacket is installed and positioned through a floating crane; s2, the steel casing is hoisted into the positioning hoop in a floating mode, holes are drilled in the steel casing to reach the designed elevation, a pile foundation is poured, and a steel-concrete composite pile structure is formed; s3, a bearing platform is prefabricated on land, a steel sleeve is preset at the bottom of the bearing platform, and a double-arm steel cofferdam is arranged on the periphery of the upper portion of the bearing platform; s4, the floating crane integral prefabricated part is moved to the designed position, and the steel sleeve is in butt joint with the top end of the steel casing; s5, the air bags are inflated to form a closed water blocking system, and water in the double-arm steel cofferdam is pumped and drained to form a dry operation area; s6, the part, exceeding the pile foundation, of the top of the steel casing is cut in the dry operation area, and a hollow structure of the bearing platform is poured; s7, the double-arm steel cofferdam and the jacket are dismantled, and a working platform is constructed; and S8, integrally hoisting the turbine unit assembly platform and the construction working platform. The construction process of the tidal current energy power station is optimized, and the stability and durability of the structure are improved.

Description

Technical Field

[0001] The invention belongs to the field of tidal energy power generation, and in particular relates to a construction method of a tidal energy power station structure. Background Art

[0002] As a cutting-edge new energy technology, tidal power generation technology has received extensive attention and research around the world in recent years. In China, tidal power generation technology has become one of the world's leading new energy technologies. At present, the LHD ocean tidal power generation project is the only megawatt-level continuous power generation and grid-connected operation in the world, and it maintains stable operation across four seasons. The first few phases of the LHD ocean tidal power generation project (including Phase I, Phase II and Phase III) used steel conductor frames as motor assembly platforms. This platform design has certain advantages in ensuring the installation and operation of the equipment, and provides the necessary structural support and rigid foundation for the entire system.

[0003] However, in the prior art, the main structure of tidal power stations mostly adopts steel conductor frames, which has certain advantages in the initial construction, but faces problems of corrosion and durability in long-term operation, especially in the marine environment, where the service life of steel structures is short and the maintenance cost is high. In addition, the unit platform of the tidal power station is generally located at a depth of 30 to 40 meters underwater, which makes construction difficult, especially how to safely and efficiently complete the installation and fixation of the structure in the seabed environment. At present, there are no cases of tidal power stations in the form of concrete structures that have been successfully converted into commercial use worldwide. Therefore, how to find a simple, reliable and highly efficient construction method to realize the construction of tidal power stations in the form of concrete structures is still a key technical problem that needs to be solved urgently in the industry. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a construction method for a tidal energy power station structure, aiming to optimize the construction process of the tidal energy power station, improve the stability and durability of the structure, and promote the sustainable development of tidal energy power generation projects.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A construction method for a tidal power station structure comprises the following steps:

[0007] S1, after prefabricating the jacket on land, transport it to the designed sea area, complete the installation and positioning of the jacket by floating crane, fix the jacket with anchors, and install a positioning hoop on the top of the jacket;

[0008] S2, floating the steel casing into the positioning hoop, re-measure the coordinates and verticality, and then drive the steel casing into the seabed rock layer below the seabed stratum plane, drill holes in the steel casing to the designed elevation and cast the pile foundation to form a steel-concrete composite pile structure;

[0009] S3, prefabricating a cap on land, prefabricating a steel sleeve at the bottom of the cap, and setting a double-arm steel cofferdam on the periphery of the upper part of the cap, wherein the double-arm steel cofferdam forms an integral prefabricated component with the cap through a temporary connector;

[0010] S4, floating the whole prefabricated component to the designed position, the steel sleeve is butted with the top of the steel casing, the steel casing passes through the steel sleeve, the whole prefabricated component is lifted downward to the designed height, an air bag is preset between the steel sleeve and the steel casing, and the whole prefabricated component is fixed to the conductor frame by a temporary connection device;

[0011] S5, the airbag is inflated to form a closed water-blocking system between the steel sleeve and the steel casing, and the water in the double-arm steel cofferdam is pumped out to form a dry working area;

[0012] S6, cutting the portion of the top of the steel casing that exceeds the pile foundation in the dry working area, and casting the hollow structure of the cap, and setting columns above the cap;

[0013] S7, dismantling the double-arm steel cofferdam and the conductor frame;

[0014] S8, hoist the turbine assembly platform as a whole, construct the working platform on the top of the column and other auxiliary structures, and finally complete the installation.

[0015] Preferably, in step S1, the anchoring piece is an anchor pile or an anchor cable.

[0016] Preferably, in step S6, the columns are formed by cast-in-place concrete using formwork in the dry working area.

[0017] Preferably, in step S6, the columns are prefabricated on land together with the cap, and hoisted together with the double-arm steel cofferdam.

[0018] Preferably, in step S6, the prefabricated parts of the columns and the pedestals are both concrete structures or steel structures.

[0019] Preferably, in step S6, columns are respectively provided on both sides above the support platform, and a plurality of detachable transverse connection systems are arranged between the columns on both sides from top to bottom to increase the wave resistance between the columns.

[0020] Preferably, the double-arm steel cofferdam is circular and consists of inner and outer double-layer steel plates, with reinforcing ribs arranged between the double-layer steel plates.

[0021] Preferably, in step S2, the top of the steel casing is flush with the top of the pile foundation, the embedding depth of the lower end of the steel casing in the seabed rock formation is less than the embedding depth of the lower end of the pile foundation in the seabed rock formation, and the embedding depth of the steel casing in the rock formation is the most unfavorable position determined according to force calculation.

[0022] Preferably, the support platform is circular, streamlined or other planar shape that can reduce tidal energy loss.

[0023] Preferably, the airbag is an annular airbag.

[0024] Preferably, the annular airbag is connected to an automatic inflation system and is equipped with a pressure sensor to automatically adjust the inflation degree of the airbag according to real-time ocean pressure changes.

[0025] Preferably, in step S5, a water pump system is used to pump out the water in the double-arm steel cofferdam, and a water level monitoring sensor is used to detect the water level in the dry working area in real time to ensure the formation of a stable dry working area.

[0026] Preferably, the turbine unit comprises a nacelle, blades and a turbine jacket, and the turbine jacket is fixedly arranged in a vertical direction between the support platform and the working platform.

[0027] Preferably, the surface of the steel casing is coated with an anti-corrosion coating to improve durability in a marine environment.

[0028] Preferably, the pile foundation is provided with a reinforcing steel mesh in the concrete.

[0029] Compared with the prior art, the advantages of the present invention are as follows: the present invention provides an innovative construction method for a tidal power station structure. The tidal power station structure constructed by the construction method of the present invention not only significantly improves the bending and shear bearing capacity of the overall structure of the tidal power station by combining a steel-concrete composite pile foundation with an integral prefabricated cap, but also effectively prolongs the service life in a marine environment; a series of processes such as onshore prefabrication, floating crane installation, on-site positioning, anchoring, drilling and pouring are adopted to achieve precise construction of complex underwater concrete structures under deep water conditions (e.g., 30-40 meters and above), significantly reducing the construction risks and difficulties brought by traditional underwater construction methods; in addition, by pre-setting air bags to form a closed water-blocking system during the construction process, and using a double-arm steel cofferdam to construct a dry working area, the concrete pouring quality and the stability of the construction environment are effectively guaranteed, thereby improving the efficiency and safety of the engineering construction; at the same time, the present invention also provides a flexible construction method combining cast-in-place and prefabrication, which can be optimized and selected according to actual engineering conditions, reduces the construction cost, has good promotion and demonstration significance, and has important technical value for promoting the industrialization development of marine new energy projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a construction schematic diagram of step S1 of the construction method of the tidal energy power station structure of the present invention;

[0031] Figure 2 It is a construction schematic diagram of step S2 of the construction method of the tidal power station structure of the present invention;

[0032] Figure 3 It is a construction schematic diagram of step S3 of the construction method of the tidal energy power station structure of the present invention;

[0033] Figure 4 It is a construction schematic diagram of step S4 of the construction method of the tidal energy power station structure of the present invention;

[0034] Figure 5 It is a construction schematic diagram of step S5 of the construction method of the tidal power station structure of the present invention;

[0035] Figure 6 It is a construction schematic diagram of step S6 of the construction method of the tidal power station structure of the present invention;

[0036] Figure 7 It is a construction schematic diagram of steps S7-S8 of the construction method of the tidal energy power station structure of the present invention;

[0037] Figure 8 It is a schematic diagram of the double-arm steel cofferdam structure of the tidal energy power station structure of the present invention.

[0038] Explanation of the reference numerals: 1- conductor frame; 2- anchor; 3- positioning hoop; 4- steel casing; 5- pile foundation; 6- cap; 7- steel sleeve; 8- double-arm steel cofferdam; 9- temporary connection piece; 10- air bag; 11- temporary connection device; 12- column; 13- working platform; 14- turbine unit; 15- transverse connection system. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the present invention.

[0040] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0041] like Figure 1-7 As shown, this embodiment discloses a construction method of a tidal power station structure, comprising the following steps:

[0042] S1, after prefabricating the jacket 1 on land, transport it to the designed sea area, complete the installation and positioning of the jacket 1 by floating crane, fix the jacket 1 by anchor 2, and install the positioning hoop 3 on the top of the jacket 1;

[0043] In this step, the jacket 1 is prefabricated on land to achieve high-quality component manufacturing in a controlled environment. After being transported to the sea area, a floating crane is used to ensure the precise positioning of the jacket 1. The anchor 2 is used to firmly fix the jacket 1, and the positioning hoop 3 provides an accurate reference for subsequent operations. The anchor 2 adopts an anchor pile or an anchor cable. The anchor pile provides a higher fixing force and is suitable for working conditions that need to withstand a large tensile force, while the anchor cable is easy to install and adjust, and can be flexibly selected according to the specific conditions on site, thereby ensuring that the jacket 1 can be stably positioned in the sea area.

[0044] S2, floating the steel casing 4 into the positioning hoop 3, re-measure the coordinates and verticality, and then drive the steel casing 4 to the seabed rock layer below the seabed stratum plane, drill holes in the steel casing 4 to the designed elevation and cast the pile foundation 5 to form a steel-concrete composite pile structure;

[0045] In this step, the steel casing 4 is used as a construction guide and reinforcement member, and the accurate position is ensured by repeated measurement and adjustment. The concrete pouring of the pile foundation 5 is realized by drilling holes in the steel casing 4, thereby forming a steel-concrete composite pile structure with high bearing capacity; and the top of the steel casing 4 is flush with the top of the pile foundation 5, and the embedding depth of the lower end of the steel casing 4 in the seabed rock layer is less than the embedding depth of the lower end of the pile foundation 5 in the seabed rock layer. This arrangement ensures that continuous and stable force transmission can be achieved between the steel casing 4 and the pile foundation 5, while allowing the pile foundation 5 to obtain deeper anchoring, thereby improving the stability of the overall structure. The embedding depth of the steel casing 4 in the rock layer is the most unfavorable position determined according to the force calculation. This depth parameter is obtained through detailed force analysis to ensure that the steel casing 4 can play the best reinforcement role under the most severe working conditions, thereby achieving the optimal force performance of the entire steel-concrete composite pile structure.

[0046] S3, prefabricate a cap 6 on land, preset a steel sleeve 7 at the bottom of the cap 6, set a double-arm steel cofferdam 8 on the outer periphery of the upper part of the cap 6, and form an integral prefabricated component with the cap 6 through a temporary connector 9;

[0047] In this step, the cap 6 is prefabricated on land as the upper key platform, and the steel sleeve 7 is preset at the bottom and the double-arm steel cofferdam 8 is set at the upper periphery, and the temporary connector 9 is used to realize the formation of the overall prefabricated component, which is convenient for rapid installation on site;

[0048] S4, the whole prefabricated component is hoisted to the designed position, the steel sleeve 7 is connected with the top of the steel casing 4, the steel casing 4 passes through the steel sleeve 7, and the whole prefabricated component is hoisted downward to the designed height, an air bag 10 is preset between the steel sleeve 7 and the steel casing 4, and the whole prefabricated component is fixed to the conductor frame 1 by a temporary connection device 11;

[0049] In this step, the whole prefabricated component is accurately hoisted to the designed position by floating crane, and the steel sleeve 7 and the steel casing 4 are accurately docked. The inner diameter of the steel sleeve 7 is slightly larger than the outer diameter of the steel casing 4, and a docking space is reserved. An air bag 10 is preset between the two as a buffer and water blocking device. At the same time, a temporary connection device 11 is used to ensure the stable connection between the whole component and the jacket 1.

[0050] S5, the airbag 10 is inflated to form a closed water-blocking system between the steel sleeve 7 and the steel casing 4, and the water in the double-arm steel cofferdam 8 is pumped out to form a dry working area;

[0051] In this step, the inflated airbag 10 forms a closed water-blocking system between the steel sleeve 7 and the steel casing 4, and a dry working area is established by pumping out the water in the double-arm steel cofferdam 8, providing a good environment for subsequent construction; the airbag 10 is an annular airbag, and the annular airbag 10 can form an annular continuous and closed water-blocking system after being inflated;

[0052] S6, cutting the portion of the top of the steel casing 4 that exceeds the pile foundation 5 in the dry working area, and casting the hollow structure of the cap 6, and setting a column 12 above the cap 6;

[0053] In this step, the portion of the steel casing 4 that exceeds the pile foundation 5 is cut in the dry working area, and the hollow structure of the cap 6 (the casting part of the cap 6) is cast, and the cap 6, the steel casing 4, and the pile foundation 5 are cast into an integrated structure, and a column 12 is set above the cap 6 to provide support;

[0054] In some embodiments, the column 12 is cast in situ by using a template in the dry working area. The cast-in-situ method uses the on-site template to ensure the good combination of concrete and the surrounding environment, forming a continuous whole, and improving the structural resistance and sealing performance. In other embodiments, the column 12 is prefabricated on land together with the pedestal 6 and hoisted together with the double-arm steel cofferdam 8. This prefabrication method ensures the quality of the components under a controlled environment. The overall hoisting not only shortens the on-site construction time, but also reduces the uncertainty and risk caused by on-site casting. The prefabricated parts of the column 12 and the pedestal 6 are both concrete structures or steel structures. The prefabricated concrete structure utilizes the excellent compressive strength and durability of concrete. Especially in the marine environment, its corrosion resistance is good, and it can operate stably for a long time. At the same time, the quality can be better controlled during the construction process, the cost is relatively low, and the fire resistance is excellent; while the prefabricated steel structure has high tensile and bending strength, light weight, convenient precision processing and rapid installation, and can achieve higher prefabrication accuracy, but anti-corrosion treatment measures need to be taken to ensure durability.

[0055] S7, dismantling the double-arm steel cofferdam 8 and the jacket 1;

[0056] In this step, the double-arm steel cofferdam 8 and the jacket 1 are removed to clear the auxiliary construction structure, thereby providing sufficient space and safety conditions for the subsequent overall lifting operation;

[0057] S8, hoisting the turbine unit 14 assembly platform as a whole, constructing the working platform 13 on the top of the column 12 and other auxiliary structures, and finally completing the installation;

[0058] In this step, the turbine unit 14 assembly platform, the working platform 13 on the top of the column 12 and other auxiliary structures are installed in place at one time through overall lifting, ensuring the precise docking and structural integrity between the components, and finally realizing the assembly and installation of the entire tidal power station equipment.

[0059] Furthermore, columns 12 are respectively provided on both sides above the pedestal 6, and multiple detachable transverse connection systems 15 are provided between the columns 12 on both sides from top to bottom to increase the wave resistance between the columns 12. By providing multiple detachable transverse connection systems 15, the load can be effectively dispersed under the action of waves, the lateral stability of the entire structure is enhanced, and maintenance or replacement is convenient when necessary.

[0060] like Figure 8As shown, further, the double-arm steel cofferdam 8 is circular, composed of inner and outer double-layer steel plates, and reinforcing ribs are arranged between the double-layer steel plates. This design enables the double-arm steel cofferdam 8 to evenly distribute the external load. The structure of the inner and outer double-layer steel plates provides excellent rigidity, and the arrangement of the reinforcing ribs further enhances its overall stability and wave resistance. In addition, the pedestal 6 is a circular or streamlined or other planar shape (top view) that can reduce tidal energy loss. This design helps to achieve uniform load distribution under the action of ocean currents, reduce flow resistance, and thus improve energy capture efficiency. At the same time, it optimizes the stress condition of the structure in a dynamic water flow environment, reduces local stress concentration caused by wave impact, and prolongs the overall service life.

[0061] Furthermore, the annular airbag is connected to the automatic inflation system and is equipped with a pressure sensor, which automatically adjusts the inflation level of the airbag according to real-time changes in ocean pressure. This design ensures that the airbag can automatically adjust the inflation volume under various sea conditions, maintain the stability of the closed water-blocking system, effectively prevent seawater infiltration and ensure the stability of the construction area environment.

[0062] In addition, in step S5, the water in the double-arm steel cofferdam 8 is pumped out by a water pump system, and the water level in the dry working area is detected in real time by a water level monitoring sensor to ensure the formation of a stable dry working area; this measure ensures the dryness of the construction area by continuously monitoring the water level changes, thereby providing a reliable environment for subsequent concrete pouring and structure installation.

[0063] The turbine unit 14 includes a nacelle, blades and a turbine jacket. The turbine jacket is fixedly arranged vertically between the pedestal 6 and the working platform 13. This arrangement ensures a stable mechanical connection between the various parts of the turbine unit, which can effectively capture the kinetic energy of the ocean and ensure the installation accuracy and operational stability of the equipment. The surface of the steel casing 4 is coated with an anti-corrosion coating to improve durability in the marine environment; the anti-corrosion coating effectively prevents seawater and salt from corroding the steel, prolongs the service life of the components, and reduces the cost of subsequent maintenance. The pile foundation 5 is provided with a reinforced steel mesh in the concrete. The provision of the reinforced steel mesh improves the compression and crack resistance of the concrete and enhances the overall structural stability and bearing capacity of the pile foundation.

[0064] In summary, the present invention discloses a construction method for a tidal power station structure, which realizes efficient and accurate installation of the tidal power station structure in the sea area by prefabricating key components such as the conductor frame 1, steel casing 4, pedestal 6, column 11 and working platform 13 on land, and adopting a series of steps such as floating hanging, anchoring, positioning, drilling and casting, and hoisting of the overall prefabricated components. This construction method not only simplifies the complex underwater operation process, ensures the good connection between the concrete structure and the steel structure, but also significantly improves the bending and shear bearing capacity and wave resistance of the structure. At the same time, it can also construct a closed water-blocking system in a deep-water environment to ensure safe and reliable engineering construction. Therefore, this technical solution greatly shortens the construction period, reduces construction risks and costs, and has important demonstration and promotion significance for improving the construction quality of tidal power stations and promoting the industrialization development of marine new energy projects.

[0065] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the above embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the above embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A construction method for a tidal power station structure, characterized in that: The following steps are involved: S1, after prefabricating the jacket (1) on land, transport it to the designed sea area, complete the installation and positioning of the jacket (1) by floating crane, fix the jacket (1) by anchoring (2), and install a positioning hoop (3) on the top of the jacket (1); S2, floating the steel casing (4) into the positioning hoop (3), re-measure the coordinates and verticality, and then drive the steel casing (4) into the seabed rock layer below the seabed stratum plane, drill holes in the steel casing (4) to the designed elevation and cast the pile foundation (5), so as to form a steel-concrete composite pile structure; S3, prefabricating a cap (6) on land, prefabricating a steel sleeve (7) at the bottom of the cap (6), and arranging a double-arm steel cofferdam (8) on the periphery of the upper part of the cap (6), wherein the double-arm steel cofferdam (8) is connected to the cap (6) via a temporary connector (9) to form an integral prefabricated component; S4, floating the whole prefabricated component to the designed position, the steel sleeve (7) is butted with the top end of the steel casing (4), the steel casing (4) passes through the steel sleeve (7), the whole prefabricated component is lifted downward to the designed height, an air bag (10) is preset between the steel sleeve (7) and the steel casing (4), and the whole prefabricated component is fixed to the conductor frame (1) by a temporary connection device (11); S5, the airbag (10) is inflated to form a closed water-blocking system between the steel sleeve (7) and the steel casing (4), and the water in the double-arm steel cofferdam (8) is pumped out to form a dry working area; S6, cutting the portion of the top of the steel casing (4) that exceeds the pile foundation (5) in the dry working area, and casting the hollow structure of the cap (6), and setting a column (12) above the cap (6); S7, dismantling the double-arm steel cofferdam (8) and the conductor pipe frame (1); S8, hoisting the turbine unit (14) assembly platform as a whole, constructing the working platform (13) on the top of the column (12) and other auxiliary structures, and finally completing the installation.

2. The construction method of the tidal power station structure according to claim 1, characterized in that: In the step S1, the anchoring piece (2) is an anchoring pile or an anchoring cable.

3. The construction method of a tidal power station structure according to claim 1, characterized in that: In the step S6, the column (12) is formed by casting concrete in situ in the dry working area through a formwork.

4. The construction method of a tidal power station structure according to claim 1, characterized in that: In the step S6, the columns (12) are prefabricated on land together with the bearing platform (6), and hoisted together with the double-arm steel cofferdam (8).

5. The construction method of the tidal power station structure according to claim 4, characterized in that: In the step S6, the prefabricated parts of the columns (12) and the support (6) are both concrete structures or steel structures.

6. The construction method of a tidal power station structure according to claim 1, characterized in that: In the step S6, columns (12) are respectively arranged on both sides above the support platform (6), and a plurality of detachable transverse connection systems (15) are arranged at intervals from top to bottom between the columns (12) on both sides to increase the wave resistance between the columns (12).

7. The construction method of a tidal power station structure according to claim 1, characterized in that: The double-arm steel cofferdam (8) is circular and is composed of inner and outer double-layer steel plates, with reinforcing ribs arranged between the double-layer steel plates.

8. The construction method of a tidal power station structure according to claim 1, characterized in that: In step S2, the top of the steel casing (4) is flush with the top of the pile foundation (5), the embedding depth of the lower end of the steel casing (4) in the seabed rock formation is less than the embedding depth of the lower end of the pile foundation (5) in the seabed rock formation, and the embedding depth of the steel casing (4) in the rock formation is the most unfavorable position determined according to force calculation.

9. The construction method of a tidal power station structure according to claim 1, characterized in that: The support platform (6) is circular, streamlined or other planar in shape to reduce tidal energy loss.

10. The construction method of a tidal power station structure according to claim 1, characterized in that: The airbag is an annular airbag.

11. The construction method of a tidal power station structure according to claim 10, characterized in that: The annular airbag is connected to an automatic inflation system and is equipped with a pressure sensor to automatically adjust the inflation degree of the airbag according to real-time ocean pressure changes.

12. The construction method of a tidal power station structure according to claim 1, characterized in that: In step S5, the water in the double-arm steel cofferdam (8) is pumped out by a water pump system, and the water level in the dry working area is detected in real time by a water level monitoring sensor to ensure the formation of a stable dry working area.

13. The construction method of a tidal power station structure according to claim 1, characterized in that: The turbine unit (14) comprises a nacelle, blades and a turbine jacket, and the turbine jacket is fixedly arranged in a vertical direction between the support platform (6) and the working platform (13).

14. The construction method of a tidal power station structure according to claim 1, characterized in that: The surface of the steel casing (4) is coated with an anti-corrosion coating to improve durability in a marine environment.

15. The construction method of a tidal power station structure according to claim 1, characterized in that: The pile foundation (5) is provided with a reinforcing steel mesh in concrete.

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