TLP tension tendon supporting device and tension leg platform

Abstract

The utility model discloses a TLP tension tendon supporting device and tension leg platform, it includes from top to bottom assembly locking mechanism, split structure, mooring anchoring mechanism, split structure includes top deck, outer bulkhead, first bulkhead, bottom deck, central tube, top deck, bottom deck and outer bulkhead enclose the shell, and the outer bulkhead is equipped with the outer bulkhead. The center pipe is arranged in the middle of the split structure in the middle, and the multiple first bulkheads are distributed between the outer bulkhead and the center pipe in the radial direction of the center pipe. The mooring anchoring mechanism comprises a top universal joint shackle, a top anchor chain section, a mooring rope, a bottom anchor chain section, a bottom shackle and a seabed anchor pile which are sequentially connected from top to bottom. The tension tendon system can be prevented from being directly installed on the floating body foundation, the design and construction of the fan floating body are not affected by the tension tendon, the displacement of the floating body can be increased, the size of the floating body can be reduced, on one hand, the heaving damping of the floating body is increased, the heaving motion response is reduced, and on the other hand, the construction, installation, operation and maintenance cost of the floating body is reduced.

Description

Technical Field

[0001] The utility model relates to deep - sea and far - sea offshore wind power, in particular to a TLP (Tension Leg Platform) tension tendon support device and a tension leg platform. Background Technique

[0002] At present, with the significant reduction of near - shore wind power resources, offshore wind power projects are gradually developing towards deep - sea and far - sea areas. The structural form of offshore wind turbine foundations is constantly changing with the increase of water depth. Fixed monopile or jacket foundation structural forms can be used in waters with a water depth of about 60 meters or less near the shore. For waters with a water depth above 60 meters, a floating foundation structural form is required. Tension - leg type wind turbine foundations are gradually being adopted in waters with a water depth above 60 meters due to their advantages such as small motion response, good stability, high power generation efficiency, simple floating - body steel structure and low weight. A tension - leg wind turbine platform generally consists of a wind turbine system, a floating - body structure, a tension tendon and a mooring and anchoring system. The tension - leg platform has a drainage volume much larger than the buoyancy, and the excess part is used as the pre - tension of the mooring chain (cable) and acts on the tension tendon to ensure that the tension tendon is in a tensioned state, always keeping the connection between the wind turbine platform and the seabed anchoring foundation to maintain the stability of the tension - leg wind turbine platform. Thus, it can be seen that the tension tendon, as a key link in the mooring and anchoring of the wind turbine platform, is related to the stability and safety of the entire wind turbine system, and the design of the tension tendon is particularly important.

[0003] The traditional tension tendon design is installed on the floating - body structure (floating - body foundation) of the wind turbine platform, and local strengthening is designed for the structure at the installation position of the tension tendon to ensure structural strength and safety, and the ballast and buoyancy are provided by the floating - body structure itself. Such a design form has been widely used in the oil and gas field and introduced into the deep - sea and far - sea floating wind power field. However, this type of design also brings some problems, such as: installing the tension tendon on the floating - body structure will have a greater impact on the design and overall strength of the floating - body structure. It is necessary to conduct local design and strengthening on the floating - body structure at the installation position according to the working conditions and loads of the tension tendon, especially the calculation and evaluation of fatigue strength. Once the tension tendon design is changed, it will have a series of chain effects on the relevant design cycle, construction cycle, etc.; the buoyancy of the tension - leg platform, the tension tendon, the mooring tension, etc. are all adjusted by the configuration and ballast of the floating - body structure of the tension - leg platform itself. The main dimensions of the floating - body structure need to be designed according to different water depths and loads, which are generally large, resulting in a relatively large steel structure weight of the floating - body structure; the procurement cycle and installation of the tension tendon system and the construction cycle of the floating - body structure need to be reasonably planned and well coordinated to ensure the construction plan of the floating - body structure and the later launching and towing plan; when the tension tendon and the surrounding structure are damaged under extreme accidental loads, it may affect the safety of the floating - body structure, and even local damage of the floating - body may occur, requiring the floating - body structure to be towed back for repair, increasing the operation and maintenance construction cost, etc.

[0004] Therefore, there is an urgent need to develop a new type of TLP tendon support device to solve the above existing problems. Summary of the Utility Model

[0005] The problem to be solved by the present utility model is as follows: Aiming at the deficiency that the tendons of a tension leg wind turbine platform are directly installed on the floating body structure, a TLP tendon support device and a tension leg platform are provided. It can not only be used as an independent design module, independently designed and built, and has basically no influence on the design, strength, construction, etc. of the floating body structure of the wind turbine platform; it can also assist in expanding the drainage of the floating body structure, reducing the main dimensions and steel structure weight of the floating body structure, facilitating the construction, launching, towing, installation, operation and maintenance of the floating body structure, effectively reducing the design and construction operation and maintenance costs, and providing a practical and efficient assembly connection mooring solution for the tension leg platform.

[0006] To solve the above technical problems, the present utility model adopts the following technical solutions:

[0007] A TLP tendon support device includes an assembly locking mechanism, a split structure and a mooring anchoring mechanism connected in sequence from top to bottom, wherein:

[0008] The assembly locking mechanism includes a connecting pipe mechanism and a connecting pipe locking and assembling mechanism, and the connecting pipe locking and assembling mechanism is installed on the connecting pipe mechanism;

[0009] The split structure includes a top deck, an outer bulkhead, a first bulkhead, a bottom deck and a central pipe. The top deck and the bottom deck are arranged opposite to each other up and down. The upper end of the central pipe is connected to the lower end of the connecting pipe mechanism, and the central pipe is centrally arranged in the middle of the top deck and the bottom deck. The outer bulkhead is vertically arranged around the top deck and the bottom deck. A plurality of the first bulkheads are radially distributed between the outer bulkhead and the central pipe along the central pipe, and a plurality of ballast tanks are formed by enclosing the first bulkhead, the central pipe and the outer bulkhead;

[0010] The mooring anchoring mechanism includes a top universal shackle, a top anchor chain section, a mooring cable, a bottom anchor chain section, a bottom shackle and a subsea anchor pile connected in sequence from top to bottom. The top universal shackle is hinged and installed at the lower end of the central pipe, and the subsea anchor pile is used to connect with the seabed surface to complete the positioning and fixing of the entire tension leg mooring system.

[0011] When the utility model is in use, only a connecting mechanism cooperating with the assembly locking mechanism needs to be arranged on the floating body structure serving as the floating body foundation at the upper part, so as to realize the connection and fixation with the floating body foundation. During the design and construction stage of the utility model, the utility model can be used as an independent design module, independently designed and independently constructed, and has basically no influence on the design, strength, construction, etc. of the floating body structure of the wind turbine platform. Moreover, the split structure of the utility model can assist in expanding the drainage of the floating body structure, reducing the main dimensions and steel structure weight of the floating body structure, facilitating the construction, launching, towing and installation, operation and maintenance of the floating body structure, effectively reducing the design and construction, operation and maintenance costs of the floating body structure, and providing a practical, feasible and efficient assembly connection and mooring scheme for the tension leg platform.

[0012] Preferably, the connecting pipe mechanism is a threaded pipe, and the connecting pipe locking and assembling mechanism is a nut matching with the threaded pipe.

[0013] Preferably, all the outer bulkheads are welded to the toe ends of all the first bulkheads, and the distance that the toe ends of the first bulkheads exceed the outer bulkheads is not less than 10 mm, and the distances that the top deck and the bottom deck protrude from the outer bulkheads are not less than 10 mm respectively.

[0014] Preferably, a plurality of flexible gusset plates are evenly distributed between the bottom of the central pipe and the bottom deck. The height of the gusset plates is 0.8 m - 1.5 m, and the bottom surface of the gusset plates is set to be arc-shaped, and the radius of the arc is consistent with the height of the gusset plates to eliminate local structural stress concentration.

[0015] Preferably, second bulkheads are arranged between adjacent first bulkheads, and a plurality of ballast tanks and empty tanks serving as operation rooms are enclosed by the first bulkheads, the second bulkheads and the central pipe.

[0016] Preferably, a watertight manhole is opened on the first bulkhead.

[0017] Preferably, the lengths of the top anchor chain section and the bottom anchor chain section are 4 m - 6 m, and the mooring cable is made of high-strength and lightweight composite materials.

[0018] Preferably, stiffeners and horizontal ring frame beams are arranged on all the bulkheads of the split structure to resist the action of water pressure and wave loads. On the top deck, mainly centered on the central pipe, stiffeners are evenly arranged in the direction parallel to the outer bulkhead, and for the part with too long span of the stiffeners in the peripheral area, a main beam is designed in the middle to reduce the span of the stiffeners, thereby reducing the scale of the stiffeners.

[0019] Based on the same inventive concept, the utility model also provides a tension leg platform, which includes a floating body foundation, a connecting mechanism is arranged on the floating body foundation, and the upper end of the assembly locking mechanism of the tension tendon support device is integrally connected with the connecting mechanism.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] (1) In the TLP tendon support device of the present utility model, the tendon is designed and installed on the split structure as an independent module, which is convenient for independently designing the tendon foundation structure and strengthening. Avoiding directly installing the tendon system on the floating body foundation reduces the design difficulty of the floating body foundation structure, enabling the tendon support device and the floating body foundation to be separately and independently constructed. The design and construction of the wind turbine floating body foundation are not affected by the delivery cycle and design changes of the tendon.

[0022] (2) The TLP tendon support device of the present utility model, as an independently designed module, is fixedly assembled with the floating body foundation to form an integrated model, which can increase the displacement of the floating body and reduce the scale of the floating body. On the one hand, it increases the heave damping of the floating body, reduces the heave motion response of the wind turbine platform, and improves the power generation efficiency of the wind turbine. On the other hand, it can adjust the size of the split structure of the support device and the scale of the floating body foundation according to the size of the wind turbine capacity. The design is flexible, facilitating the construction, launching, and towing of the floating body foundation, etc., and reducing the construction and installation costs.

[0023] (3) The TLP tendon support device of the present utility model is provided with a ballast tank, which is convenient for tendon installation. At the same time, in the event of damage to the tendon and its surrounding structures under extreme accidental loads, the tendon support device can be separately disassembled and returned to the factory for repair and construction. The tendon and the auxiliary structure can be replaced on the ground, avoiding underwater operation to replace the tendon on the floating body foundation or even towing the entire floating body foundation back, saving the operation and maintenance construction costs after the operation of the wind turbine system.

[0024] (4) The connection structure between the tendon of the TLP tendon support device of the present utility model and the mooring and anchoring system is simple, and it is easier to adjust and control the horizontal offset of the wind turbine floating body. It can be widely applied to deep-sea floating wind farms, and quickly realize the commercialization of large-capacity deep-sea floating wind power projects in China. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is the general schematic diagram of the TLP tendon support device of the present utility model.

[0027] Figure 2 It is the structural schematic diagram of the split structure of the present utility model.

[0028] Figure 3 This is a top view structural schematic diagram of the split structure of the present utility model.

[0029] Figure 4 This is a sectional view structural schematic diagram at the first bulkhead of the split structure of the present utility model.

[0030] Figure 5 This is a typical structural schematic diagram of the outer bulkhead of the present utility model.

[0031] In the figure: 1 - Assembly locking mechanism, 1-1 - Connecting pipe mechanism, 1-2 - Connecting pipe locking and assembling mechanism; 2 - Split structure, 2-1 - Top deck, 2-1-1 - Top deck stiffener, 2-1-2 - Top deck girder, 2-2 - Outer bulkhead, 2-2-1 - Outer bulkhead stiffener, 2-2-2 - Outer bulkhead horizontal frame beam, 2-3 - First bulkhead, 2-3-1 - First bulkhead stiffener, 2-3-2 - First bulkhead horizontal frame beam, 2-3-3 - Watertight door opening, 2-4 - Bottom deck, 2-5 - Second bulkhead, 2-6 - Central pipe, 2-7 - Brackets, 2-8 - Bottom of the central pipe; 3 - Mooring and anchoring mechanism, 3-1 - Top universal shackle, 3-2 - Top anchor chain section, 3-3 - Mooring cable, 3-4 - Bottom anchor chain section, 3-5 - Bottom shackle, 3-6 - Submarine anchor pile, 3-7 - Seabed surface. Detailed implementation mode

[0032] The following further describes the present utility model in conjunction with specific and preferred embodiments, but does not limit the protection scope of the present utility model thereby.

[0033] For the convenience of description, the relative position relationships of each component, such as: up, down, left, right, etc., are described according to the layout direction of the drawings in the specification, and do not limit the structure of this patent.

[0034] Please refer to Figure 1 , an embodiment of a split TLP tension tendon support device of the present utility model includes an assembly locking mechanism 1, a split structure 2, and a mooring and anchoring mechanism 3 that are connected in sequence from top to bottom.

[0035] The assembly locking mechanism 1 includes a connecting pipe mechanism 1-1 and a connecting pipe locking and assembling mechanism 1-2. The connecting pipe locking and assembling mechanism 1-2 is installed on the connecting pipe mechanism 1-1. In this embodiment, the connecting pipe mechanism 1-1 is a threaded pipe, and the connecting pipe locking and assembling mechanism 1-2 is a nut matching the threaded pipe. Obviously, the connecting pipe mechanism 1-1 and the connecting pipe locking and assembling mechanism 1-2 of the present utility model can also be other structures that can achieve quick connection, such as quick-insert interfaces, etc. The connecting pipe mechanism 1-1 is welded to the center of the upper deck of the split support structure and continues to the bottom center pipe to ensure the structural strength of the center pipe.

[0036] The mooring and anchoring mechanism 3 includes a top universal shackle 3-1, a top anchor chain section 3-2, a mooring cable 3-3, a bottom anchor chain section 3-4, a bottom shackle 3-5, and a seabed anchor pile 3-6. The top universal shackle 3-1 is hinged and installed at the bottom 2-8 of the center pipe of the split structure 2 (see Figure 4 ), to allow the bottom mooring system composed of the top anchor chain section 3-2, the bottom anchor chain section 3-4, and the mooring cable 3-3 to move in all directions. The upper end of the top anchor chain section 3-2 is connected to the top universal shackle 3-1, the lower end is connected to one end of the mooring cable 3-3, the other end of the mooring cable 3-3 is connected to the upper end of the bottom anchor chain section 3-4, the lower end of the bottom anchor chain section 3-4 is connected to the bottom shackle 3-5 by hanging the chain, and the bottom shackle 3-5 is installed on the seabed anchor pile 3-6 to complete the positioning and fixing of the entire tension leg mooring system. The top anchor chain section 3-2 and the bottom anchor chain section 3-4 are respectively metal anchor chain sections with a length of about 5m, and the mooring cable 3-3 is made of high-strength lightweight composite materials. In this embodiment, the mooring and anchoring mechanism 3 may further include a top mooring support mechanism. The upper end of the top mooring support mechanism is welded to the center of the bottom deck of the split structure 2 and connected to the center pipe to ensure the connection structural strength. At the same time, the lower end of the top mooring support mechanism is hinged to the top universal shackle 3-1.

[0037] As Figure 2As shown, the split structure 2 includes a top deck 2-1, an outer bulkhead 2-2, a first partition bulkhead 2-3, a bottom deck 2-4, a second partition bulkhead 2-5, a central pipe 2-6, a bracket 2-7, and a bottom of the central pipe 2-8. Among them, the top deck 2-1 and the bottom deck 2-4 are regular hexagons. The top deck 2-1, the bottom deck 2-4, and the hexahedron-shaped outer bulkhead 2-2 are fully penetrated and welded to form the overall outer shell of the split structure 2. The hexahedron-shaped outer bulkhead 2-2 and the second partition bulkhead 2-5 form a double-hull structure. All the outer bulkheads 2-2 are welded to the toes of all the first partition bulkheads 2-3. The toes of the first partition bulkheads 2-3 should exceed the outer bulkhead 2-2 by 10 mm to facilitate the construction of the outside fillet weld. Similarly, the top deck 2-1 and the bottom deck 2-4 should protrude from the outer bulkhead 2-2 by 10 mm. The central pipe 2-6 is located at the center of the split structure, passes through the top deck 2-1 and continuously passes downward through the bottom deck 2-4 and extends to the bottom of the central pipe 2-8. Four flexible brackets 2-7 are designed between the bottom of the central pipe 2-8 and the bottom deck 2-4. The adjacent brackets 2-7 are spaced 90° apart and are fully penetrated and welded between the bottom deck 2-4 and the central pipe 2-6, with a height of 0.8 m - 1.5 m. The bottom surface of the bracket 2-7 is designed to be arc-shaped, and the arc radius is the same as the height to eliminate the local structural stress concentration phenomenon here. The first partition bulkhead 2-3 connects the diagonals of the regular hexagon and converges to the internally empty central pipe 2-6 and is fully penetrated and welded to the central pipe 2-6 to ensure the overall strength of the split structure 2. To improve the overall internal strength of the entire split structure 2, a hexahedron-shaped second partition bulkhead 2-5 is added. The second partition bulkhead 2-5, the outer bulkhead 2-2, and the outer section of the first partition bulkhead 2-3 enclose multiple ballast tanks. At the same time, the second partition bulkhead 2-5, the central pipe 2-6, and the inner section of the first partition bulkhead 2-3 enclose multiple ballast tanks and empty tanks used as operation rooms. The design of multiple ballast tanks of the split structure 2 can assist the floating body foundation to increase ballast, not only can reduce the main dimensions of the floating body foundation, but also can increase the heave damping together with the floating body foundation, reduce the heave motion response, improve the wind turbine power generation efficiency, and is also convenient for the installation and construction of the mooring cables and the launching, towing, and installation after the reduction of the main dimensions of the floating body foundation. Generally, typical watertight manholes 2-3-3 will be opened on the first partition bulkhead 2-3, and the opening positions of the manhole covers should be reasonably arranged in the low-stress area according to the structural stress distribution. The opening sizes are 400 mm x 600 mm, 600 mm x 800 mm, etc., to ensure that each compartment can have a path for entry for the detection of the compartment.

[0038] To resist the action of water pressure and wave loads and improve the overall structural strength of the split structure 2, as Figure 5 shown, on all the outer bulkheads 2-2, outer bulkhead stiffeners 2-2-1 are arranged vertically and outer bulkhead horizontal frame beams 2-2-2 are arranged horizontally; as Figure 4As shown in the figure, on the first bulkhead 2-3, the first bulkhead stiffeners 2-3-1 are arranged vertically, and the first bulkhead horizontal frame beams 2-3-2 are arranged horizontally. The distance between adjacent outer bulkhead stiffeners 2-2-1 and the first bulkhead stiffeners 2-3-1 is between 600 mm and 800 mm. At a length of 3 to 5 times the distance between the stiffeners, the outer bulkhead horizontal frame beam 2-2-2 or the first bulkhead horizontal frame beam 2-3-2 is designed to control the span of the outer bulkhead stiffeners 2-2-1 or the first bulkhead stiffeners 2-3-1, thereby reducing the size of the outer bulkhead stiffeners 2-2-1 or the first bulkhead stiffeners 2-3-1; such as Figure 3 As shown in the figure, on the top deck 2-1, centered on the central pipe 2-6, the top deck stiffeners 2-1-1 are arranged parallel to the outer bulkhead. For the part of the top deck stiffeners in the peripheral area with an overly long span, the top deck girder 2-1-2 is designed in the middle of the top deck stiffeners 2-1-1 to reduce the span of the top deck stiffeners 2-1-1, thereby reducing the size of the top deck stiffeners 2-1-1.

[0039] The connecting pipe mechanism 1-1 of the assembly locking mechanism 1 is coaxially installed with the central pipe 2-6 of the split structure 2. The entire split structure 2 can be assembled and installed into a whole with the floating body foundation of the corresponding floating wind turbine system through the assembly locking mechanism 1, and then the tension leg wind turbine platform is completed through the mooring and anchoring mechanism 3 at the bottom for the mooring and positioning of the entire wind turbine system.

[0040] The TLP tension tendon support device of the present utility model designs and installs the tension tendon on the split structure 2 as an independent module, which is convenient for the independent design and strengthening of the tension tendon foundation structure, avoids directly installing the tension tendon system on the floating body foundation, reduces the design difficulty of the floating body foundation structure, and can separately disassemble the tension tendon support device and return it to the factory for repair and construction under extreme accidental load conditions. The tension tendon and the auxiliary structure can be replaced through ground operations, avoiding underwater operations to replace the tension tendon on the floating body foundation and even avoiding towing the entire floating body foundation back. The TLP tension tendon support device is separately and independently constructed from the floating body foundation. The design and construction of the wind turbine floating body foundation are not affected by the supply cycle and design changes of the tension tendon; the TLP tension tendon support device is fixedly assembled with the floating body foundation into an integrated model, and a ballast tank is provided inside, which can increase the displacement of the floating body and reduce the size of the floating body. On the one hand, it increases the heaving damping of the floating body, reduces the heaving motion response of the wind turbine platform, and improves the power generation efficiency of the wind turbine. On the other hand, the size of the split structure of the support device and the size of the floating body can be adjusted according to the size of the wind turbine. The design is flexible, which is convenient for the construction of the floating body, such as launching and towing, and reduces the costs of construction, installation, operation and maintenance.

[0041] As described above, it is only the specific implementation scheme of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art can make many possible changes and modifications to the technical scheme of the present utility model by using the technical content disclosed above, or modify it into an equivalent embodiment with equivalent changes. Therefore, all content that does not depart from the technical scheme of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model shall fall within the protection scope of the technical scheme of the present utility model.

Claims

1. A TLP tendon support device, characterized in that It includes an assembly locking mechanism, a split structure, and a mooring and anchoring mechanism connected in sequence from top to bottom, where: The assembly locking mechanism includes a connecting pipe mechanism and a connecting pipe locking and assembling mechanism, and the connecting pipe locking and assembling mechanism is installed on the connecting pipe mechanism; The split structure includes a top deck, an outer bulkhead, a first bulkhead, a bottom deck, and a central pipe. The top deck and the bottom deck are arranged opposite to each other vertically. The upper end of the central pipe is connected to the lower end of the connecting pipe mechanism, and the central pipe is centrally arranged in the middle of the top deck and the bottom deck. The outer bulkhead is vertically arranged around the top deck and the bottom deck. A plurality of the first bulkheads are radially distributed between the outer bulkhead and the central pipe along the central pipe. The first bulkheads, the central pipe, and the outer bulkhead enclose and form a plurality of ballast tanks; The mooring and anchoring mechanism includes a top universal shackle, a top anchor chain section, a mooring cable, a bottom anchor chain section, a bottom shackle, and a subsea anchor pile connected in sequence from top to bottom. The top universal shackle is hingedly installed at the lower end of the central pipe, and the subsea anchor pile is used to connect to the seabed surface to complete the positioning and fixing of the entire tension leg mooring system.

2. The TLP tendon support device according to claim 1, characterized in that, The connecting pipe mechanism is a threaded pipe, and the connecting pipe locking and assembling mechanism is a nut matching the threaded pipe.

3. The TLP tendon support device according to claim 1, characterized in that, The outer bulkhead is all welded to the toes of all the first bulkheads, and the distance that the toes of the first bulkheads exceed the outer bulkhead is not less than 10 mm. The distances that the top deck and the bottom deck protrude from the outer bulkhead are not less than 10 mm.

4. The TLP tendon support device according to claim 1, characterized in that, A plurality of flexible gusset plates are evenly distributed between the bottom of the central pipe and the bottom deck. The height of the gusset plates is 0.8 m - 1.5 m, and the bottom surface of the gusset plates is set to be arc-shaped, and the radius of the arc is the same as the height of the gusset plates.

5. The TLP tendon support device according to claim 1, wherein A second bulkhead is arranged between adjacent first bulkheads. The first bulkheads, the second bulkheads, and the central pipe enclose and form a plurality of ballast tanks and empty tanks used as operation rooms.

6. The TLP tendon support device according to claim 1, characterized in that, Watertight manholes are opened on the first bulkheads.

7. The TLP tendon support device according to claim 1, characterized in that, The lengths of the top anchor chain section and the bottom anchor chain section are 4 m - 6 m, and the mooring cable is made of high-strength lightweight composite materials.

8. The TLP tendon support device according to claim 1, characterized in that, Reinforcing ribs and horizontal circular frame beams are arranged on all the bulkheads of the split structure. On the top deck, centering on the central pipe, reinforcing ribs are evenly distributed parallel to the outer bulkhead, and main beams are arranged between the reinforcing ribs in the peripheral area.

9. A tension leg platform, comprising a floating body foundation, characterized in that, A connecting mechanism is arranged on the floating body foundation, and the upper end of the assembly locking mechanism of the tension tendon support device according to any one of claims 1 - 8 is connected to the connecting mechanism as a whole.

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