Lattice hoop plate for offshore jack-up platform and installation method thereof

Abstract

The present invention proposes a lattice hoop plate and installation method for an offshore jack-up platform. The lattice hoop plate comprises a hoop plate assembly and a lifting assembly. The hoop plate assembly is provided with leg clearance holes and is detachably connected to the legs of the offshore jack-up platform. One end of the lifting assembly is transmission-connected to the hoop plate assembly, while the other end extends upward from the hoop plate assembly and is connected to the platform body of the offshore jack-up platform to drive the hoop plate assembly to move up and down along the length of the lifting assembly. The technical solution of this application can reduce the risk of settlement of the legs of the offshore jack-up platform and improve the load-bearing capacity of the legs.

Description

Technical Field

[0001] The present invention relates to the technical field of marine engineering, and in particular to a lattice hoop plate for an offshore jack-up platform and an installation method thereof. Background Art

[0002] An offshore jack-up platform is a mobile marine platform consisting of a platform body and retractable legs. During operation, the legs primarily secure the platform to the seabed, while the legs support the platform body, like a ship's hull, above the sea. These platforms can be used for offshore field surveys, offshore drilling, and offshore wind farm construction. Because the legs' contact area with the seabed is relatively small, they are not suitable for soft soil formations. Furthermore, when the formation is hard on top and soft on the bottom, the legs need to be driven into the seabed to meet the required bearing capacity. However, during this process, the legs can easily pierce the hard upper formation, causing the pile shoes to rapidly settle. Furthermore, each leg independently bears the load, resulting in poor overall stability. Summary of the Invention

[0003] The main purpose of the present invention is to provide a lattice hoop plate for an offshore jack-up platform and an installation method thereof, aiming to reduce the settlement risk of the pile legs of the offshore jack-up platform and improve the bearing capacity of the pile legs.

[0004] To achieve the above-mentioned purpose, the present invention proposes a lattice hoop plate, comprising:

[0005] A hoop assembly, wherein the hoop assembly is provided with a pile leg avoidance hole, and the hoop assembly is used to be detachably connected to the pile leg of the offshore jack-up platform; and

[0006] A lifting assembly, one end of which is transmission-connected to the hoop assembly, and the other end of which extends upward from the hoop assembly, is used to connect to the platform body of the offshore jack-up platform to drive the hoop assembly to move up and down along the length direction of the lifting assembly.

[0007] Optionally, the hoop plate assembly comprises:

[0008] A frame body, the frame body being provided with the pile leg avoidance holes and being transmission-connected to the lifting assembly, the frame body being used for detachable connection with the pile legs; and

[0009] The hoop plate is detachably provided on the frame body so as to move up and down along the length direction of the lifting assembly with the frame body.

[0010] Optionally, the hoop assembly further comprises a connecting member, one end of which is rotatably connected to the frame body, and the other end of which is movably arranged relative to the frame body for detachable connection with the pile leg.

[0011] Optionally, a slot is provided at one end of the connector away from the frame for snap-fitting with the pile leg.

[0012] Optionally, the frame is provided with a plurality of hoop plate mounting holes;

[0013] The hoop plate includes a plurality of hoop plate units, and each of the hoop plate units is embedded in a hoop plate installation hole.

[0014] Optionally, one end of the hoop plate unit is rotatably connected to the frame to cover or open the hoop plate mounting hole.

[0015] Optionally, the hoop plate unit is provided with a plurality of through holes.

[0016] Optionally, the pile leg avoidance hole is arranged in a regular hexagon.

[0017] Optionally, a plurality of the pile leg avoidance holes are provided, and the plurality of the pile leg avoidance holes are arranged at intervals along the circumference of the lattice hoop plate.

[0018] The present invention further provides an installation method, which is applied to the lattice hoop plate as described above, and the installation method comprises the following steps:

[0019] Loading a lattice hoop plate below the platform body of an offshore jack-up platform;

[0020] Driving the pile legs of the offshore jack-up platform to sink and pass through the pile leg avoidance holes of the hoop assembly until the pile legs are installed on the seabed formation;

[0021] The lifting assembly is started to lower the hoop assembly to the seabed along the height direction of the pile legs, and the hoop assembly and the pile legs are fixed.

[0022] According to the technical solution of the present invention, the lattice hoops can be driven by the lifting assembly to lower the hoop plate assembly to the seabed, and the hoop plate assembly and the pile legs can be detachably connected to form an integral structure. Such an arrangement, compared with the technical solution in which the platform body is fixed to the seabed only by the pile legs, not only increases the contact area between the overall structure of the bottom of the offshore self-elevating platform and the seabed, thereby effectively preventing the risk of uneven settlement of the pile legs, making it applicable to various seabed strata working conditions such as soft soil, hard upper and soft lower, and uneven soil, but also allows the lattice hoops and the pile legs to share the load, thereby improving the bearing capacity of the pile legs, and enhancing the structural stability and load transmission performance of the overall structure. 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 the structures shown in these drawings without paying any creative work.

[0024] Figure 1 This is a structural schematic diagram of an embodiment of a lattice hoop plate for an offshore jack-up platform according to the present invention;

[0025] Figure 2 for Figure 1 Side view of the middle lattice hoop plate;

[0026] Figure 3 for Figure 1 Schematic diagram of the installation process of the medium lattice hoop plate;

[0027] Figure 4 for Figure 3 A schematic structural diagram of a middle lattice hoop plate in an installed state;

[0028] Figure 5 for Figure 4 Side view of the middle lattice hoop plate;

[0029] Figure 6 for Figure 1 Schematic diagram of part of the structure of the middle lattice hoop plate;

[0030] Figure 7 for Figure 1 Schematic diagram of the installation of the connecting parts of the medium lattice hoop plate.

[0031] Description of Figure Numbers:

[0032] Label name Label name 100 Offshore jack-up platform 1121 Stud plate unit 10 Lattice hoop plate 1122 through-hole 11 Hoop plate assembly 113 Connectors 111 frame 12 Lifting components 1111 Pile leg avoidance hole 20 Platform 1112 Hoop plate mounting hole 30 pile legs 112 hoop plate

[0033] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0037] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] The present invention provides a lattice hoop plate 10 , an offshore jack-up platform 100 , and a corresponding installation method, which can reduce the settlement risk of the pile legs 30 of the offshore jack-up platform 100 and improve the bearing capacity of the pile legs 30 .

[0039] The solution of this application will be described below with reference to specific embodiments.

[0040] Please refer to Figures 1 to 5 In some embodiments of the lattice hoop plate 10 for an offshore jack-up platform 100, the lattice hoop plate 10 comprises:

[0041] A hoop assembly 11, wherein the hoop assembly 11 is provided with a pile leg avoidance hole 1111, and the hoop assembly 11 is used to be detachably connected to the pile leg 30 of the offshore jack-up platform 100; and

[0042] The lifting assembly 12 has one end that is transmission-connected to the hoop assembly 11 and the other end that extends upward from the hoop assembly 11 and is used to connect to the platform body 20 of the offshore jack-up platform 100 to drive the hoop assembly 11 to move up and down along the length direction of the lifting assembly 12.

[0043] In this embodiment, the lattice hoop plate 10 can be applied to an offshore jack-up platform 100. The hoop plate assembly 11 of the lattice hoop plate 10 is used to be installed below the platform body 20 of the offshore jack-up platform 100, wherein the platform body 20 can be, but is not limited to, a hull structure. The hoop plate assembly 11 is provided with a pile leg avoidance hole 1111, so that the pile legs 30 connected to the platform body 20 can be extended downward through the pile leg avoidance hole 1111 and fixed to the seabed to support the platform body 20 above the sea surface; one end of the lifting assembly 12 is transmission-connected to the hoop plate assembly 11, and the other end extends toward the top of the hoop plate assembly 11 for connecting and fixing the platform body 20, and the lifting assembly 12 extends along the height direction of the pile legs 30. With this arrangement, the lifting assembly 12 can drive the hoop plate assembly 11 to move up and down along the length direction of the lifting assembly 12, that is, the hoop plate assembly 11 can move toward or away from the seabed along the height direction of the pile legs 30.

[0044] In some embodiments, the lifting assembly 12 can be configured as a linear guide rail and a driving member, wherein the linear guide rail extends along the height direction of the pile leg 30, and the driving member is provided at one end of the linear guide rail, for driving the hoop plate assembly 11 to move linearly along the length direction of the linear guide rail; the lifting assembly 12 can also be configured as a telescopic assembly, which drives the hoop plate assembly 11 connected to the lifting assembly 12 to move up and down along the height direction of the pile leg 30 by telescopic movement along the height direction of the pile leg 30; of course, the lifting assembly 12 can also be configured as other driving structures that can drive the hoop plate assembly 11 to move in a linear direction. The specific implementation method can be set according to actual needs and is not limited here.

[0045] It should be noted that the offshore jack-up platform 100 is a mobile marine platform consisting of a platform body 20 and retractable legs 30. During operation, it is primarily secured to the seabed by the legs 30. The platform body 20, like a ship hull, is supported above the sea surface by the legs 30. It can be used for offshore field surveys, offshore drilling, offshore wind farm construction, and the like. Because the legs 30 of the offshore jack-up platform 100 have a relatively small contact area with the seabed, they are not suitable for soft soil formations. Furthermore, when the formation is hard on top and soft on the bottom, the legs 30 need to be pressed into a certain depth to meet the bearing capacity requirements. However, during the pressing process, the legs 30 can easily pierce the upper hard formation, causing the pile shoes to sink rapidly. Furthermore, each leg 30 bears the load independently, resulting in poor overall stability.

[0046] Therefore, it can be understood that the technical solution of the present invention applies the lattice hoop plate 10 to the installation and fixation of the existing offshore self-elevating platform 100, drives the hoop plate assembly 11 to be lowered to the seabed through the lifting assembly 12, and makes the hoop plate assembly 11 and the pile legs 30 detachably connected to form an integral structure. Compared with the technical solution in the existing related art that fixes the platform body 20 to the seabed only by the pile legs 30, it not only increases the contact area between the bottom overall structure of the offshore self-elevating platform 100 and the seabed, thereby effectively preventing the risk of uneven settlement of the pile legs 30, making it applicable to various seabed strata working conditions such as soft soil, hard upper and soft lower, and uneven soil, but also enables the lattice hoop plate 10 and the pile legs 30 to share the load, thereby improving the bearing capacity of the pile legs 30 and improving the structural stability and load transmission performance of the overall structure.

[0047] Please refer to Figure 1 or Figure 2 In some embodiments of the inventive lattice hoop plate 10, the hoop plate assembly 11 includes:

[0048] A frame 111, wherein the frame 111 is provided with the pile leg avoidance hole 1111 and is transmission-connected to the lifting assembly 12, and the frame 111 is used for detachable connection with the pile leg 30; and

[0049] The hoop plate 112 is detachably mounted on the frame 111 so as to move up and down along the length direction of the lifting assembly 12 along with the frame 111 .

[0050] In this embodiment, the hoop assembly 11 includes a frame 111 and hoop plates 112. Specifically, the frame 111 is a lattice-type component, that is, a stable support structure composed of several components with smaller cross-sections, which is light in weight and has good structural strength, and serves as the skeleton structure of the hoop assembly 11; the hoop plates 112 are detachably mounted on the frame 111, so as to move up and down along the length of the lifting assembly 12 with the frame 111, thereby being able to abut the seabed and increase the contact area between the bottom structure of the offshore jack-up platform 100 and the seabed, thereby greatly improving the bearing capacity of the offshore jack-up platform 100 and effectively reducing the impact of seawater scouring. Among them, the hoop plates 112 can be set as an integrated component, or can be formed by combining multiple hoop plate units 1121 as in the following embodiment. The specific implementation method can be set according to actual needs and is not limited here.

[0051] Please refer to Figure 6 or Figure 7 In some embodiments of the lattice hoop plate 10 of the invention, the hoop plate assembly 11 further includes a connecting member 113, one end of the connecting member 113 is rotatably connected to the frame body 111, and the other end is movably arranged relative to the frame body 111 for detachable connection with the pile leg 30.

[0052] In this embodiment, the truss plate assembly 11 further includes a connector 113. One end of the connector 113 is rotatably connected to the frame 111, and may be, but is not limited to, hingedly connected to the frame 111. The other end of the connector 113 is movably disposed relative to the frame 111, so as to be placed flat on the frame 111 or detachably connected to the pile leg 30, thereby securing the truss plate assembly 11 and the pile leg 30 to each other. Specifically, a connector 113 rotator is provided at the end of the connector 113 facing the frame 111. The connector 113 rotator can drive the connector 113 to swing back and forth relative to the frame 111, thereby controlling the connector 113 to freely switch between a connected state and a detached state relative to the pile leg 30 according to actual usage requirements. The connector 113 can be detached to facilitate the truss plate structure to be lowered along the height of the pile leg 30, and can also be fixedly connected to the pile leg 30 after the truss plate assembly 11 is lowered to the seabed, thereby improving the overall structural stability. Furthermore, in a feasible embodiment, each pile leg 30 can be connected to the frame 111 via a plurality of connectors 113 , and the plurality of connectors 113 can be arranged at intervals around the circumference of the pile leg 30 . Such an arrangement is conducive to improving the connection stability between the hoop plate assembly 11 and the pile leg 30 .

[0053] It is understandable that the connector 113 is detachably mounted on the frame 111 , which facilitates separate maintenance or replacement of the connector 113 when it is damaged or destroyed, thereby helping to reduce the maintenance cost of the hoop assembly 11 .

[0054] In some embodiments, when the hoop plate assembly 11 is raised or lowered, the connector 113 lies flat above the frame 111. When the hoop plate assembly 11 is lowered to the seabed, the connector 113 connects to the legs 30, thereby connecting the lattice hoop plate 10 and the legs 30 into a single unit. Furthermore, in one feasible embodiment, when the connector 113 connects the legs 30 and the frame 111, it is tilted at 45° relative to the plane of the frame 111. This allows the connector 113, the frame 111, and the legs 30 to enclose a triangular structure, providing excellent support and fixing effects.

[0055] In some embodiments of the lattice hoop plate 10 of the present invention, a slot is provided at one end of the connector 113 away from the frame 111 for snap-fitting with the pile leg 30 .

[0056] In this embodiment, a slot is provided at the end of the connecting member 113 away from the frame 111, and the slot is a ring structure with one end open, thereby allowing the end of the connecting member 113 away from the frame 111 to be buckled on the pile leg 30, so that the hoop plate assembly 11 can be snap-connected with the pile leg 30, thereby fixing the hoop plate assembly 11 and the pile leg 30 as a whole, thereby improving the stability and load transmission performance of the overall structure, and effectively preventing uneven settlement of the pile leg 30.

[0057] Please refer to Figures 1 to 5 , in some embodiments of the inventive lattice hoop plate 10 , the frame 111 is provided with a plurality of hoop plate mounting holes 1112 ;

[0058] The hoop plate includes a plurality of hoop plate units 1121 , and each of the hoop plate units 1121 is embedded in one of the hoop plate mounting holes 1112 .

[0059] In this embodiment, the frame 111 is provided with a plurality of hoop plate mounting holes 1112, and the hoop plate includes a plurality of hoop plate units 1121. Each hoop plate unit 1121 is embedded in a hoop plate mounting hole 1112 to connect with the frame 111 to form an integral hoop plate assembly 11. It will be appreciated that the hoop plate is composed of a plurality of detachable hoop plate units 1121, which facilitates individual maintenance or replacement of each panel unit when it is damaged or destroyed, thereby reducing hoop plate maintenance costs.

[0060] Among them, the shape of the hoop plate unit 1121 can be but is not limited to being set to a quadrilateral symmetrical structure, a hexagonal symmetrical structure or a structure of other shapes. The specific implementation method can be adaptively adjusted according to the position, size and shape of the hoop plate mounting hole 1112 on the frame 111, and is not limited here.

[0061] Please refer to Figures 1 to 5 In some embodiments of the lattice hoop plate 10 of the present invention, one end of the hoop plate unit 1121 is rotatably connected to the frame 111 to cover or open the hoop plate mounting hole 1112.

[0062] In this embodiment, one end of the hoop plate unit 1121 is rotatably connected to the frame body 111, so that the hoop plate unit 1121 can rotate toward the hoop plate mounting hole 1112 to cover the hoop plate mounting hole 1112, or rotate away from the hoop plate mounting hole 1112 to open the hoop plate mounting hole 1112. Specifically, a hoop plate rotator is provided at the end of the hoop plate unit 1121 facing the frame body 111. The hoop plate rotator can drive the hoop plate unit 1121 to swing back and forth relative to the frame body 111, so as to control the hoop plate unit 1121 to freely switch between a covering state and an open state relative to the hoop plate mounting hole 1112 according to actual usage requirements.

[0063] In some embodiments, when the hoop plate assembly 11 is raised and lowered, the hoop plate units 1121 are in an open state, with both ends of the hoop plate mounting holes 1112 connected. When the hoop plate assembly 11 is lowered to the seabed, the hoop plate units 1121 rotate toward the hoop plate mounting holes 1112 to cover the hoop plate mounting holes 1112. This configuration can reduce the resistance encountered by the hoop plate assembly 11 during its raising and lowering movement, thereby facilitating the sinking installation of the lattice hoop plate 10. Furthermore, in a feasible embodiment, when the hoop plate units 1121 are in an open state, they extend along the raising and lowering direction of the hoop plate assembly 11, thereby reducing the cross-sectional area of ​​the hoop plate assembly 11 in a plane perpendicular to the raising and lowering direction, thereby reducing the resistance encountered by the hoop plate assembly 11 during the raising and lowering process, thereby facilitating the sinking installation of the lattice hoop plate 10.

[0064] Please refer to Figures 1 to 5 In some embodiments of the lattice hoop plate 10 of the present invention, the hoop plate unit 1121 is provided with a plurality of through holes 1122 .

[0065] In this embodiment, a plurality of through holes 1122 are provided on the hoop plate unit 1121, and the plurality of through holes 1122 are evenly arranged in an array, thereby reducing the resistance encountered by the hoop plate unit 1121 during rotation, so as to facilitate the switching of the hoop plate unit 1121 between the closed state and the open state.

[0066] In some embodiments of the lattice hoop plate 10 of the present invention, the leg avoidance holes 1111 are arranged in a regular hexagonal shape.

[0067] In this embodiment, the pile leg avoidance hole 1111 is arranged in a regular hexagon. Such an arrangement enables the hoop plate assembly 11 to be suitable for the placement of pile legs 30 of various shapes such as triangles, quadrilaterals, regular hexagons, and circles, thereby improving the applicability of the lattice hoop plate 10.

[0068] Please refer to Figures 1 to 5 In some embodiments of the lattice hoop plate 10 of the present invention, a plurality of pile leg avoidance holes 1111 are provided, and the plurality of pile leg avoidance holes 1111 are arranged at intervals along the circumference of the lattice hoop plate 10 .

[0069] In this embodiment, a plurality of pile leg avoidance holes 1111 are provided, and the offshore jack-up platform 100 is provided with a plurality of pile legs. Each pile leg avoidance hole 1111 is provided corresponding to a pile leg 30 of the offshore jack-up platform 100, and the plurality of pile leg avoidance holes 1111 are provided on the inner periphery of the lattice hoop plate 10 and are arranged at intervals along the circumference of the lattice hoop plate 10. With such an arrangement, the plurality of pile legs 30 of the offshore jack-up platform 100 can be combined through the lattice hoop plate 10 to form an integral structure, so that the plurality of pile legs 30 and the lattice hoop plate 10 can jointly bear the load, thereby improving the bearing capacity of the offshore jack-up platform 100 and the structural stability of its overall structure, and reducing the risk of uneven settlement of the pile legs 30.

[0070] The present application also provides an installation method, which is applied to the lattice hoop plate 10 as described above, and the installation method comprises the following steps:

[0071] Step S10, loading the lattice hoop plate 10 below the platform body 20 of the offshore jack-up platform 100;

[0072] The installation method proposed in this application is applied to a lattice hoop plate 10, and the lattice hoop plate 10 can be applied to an offshore jack-up platform 100 that relies on a stable seabed foundation to bear its own weight and working load in the existing related technology. Specifically, the offshore jack-up platform 100 includes a hoop plate assembly 11, a platform body 20, and pile legs 30. The hoop plate assembly 11 is assembled by assembling the hoop plate, a frame 111, and a connector 113. One end of the lifting assembly 12 is connected to the platform body 20, and the other end extends downward and is fixed to the hoop plate assembly 11, so that the lattice hoop plate 10 is installed below the platform body 20.

[0073] In some embodiments, the hoop plate includes a plurality of hoop plate units 1121 as described in the above embodiments, and each hoop plate unit 1121 is rotatably connected to the frame 111 via a hoop plate rotator. One end of the connector 113 is rotatably connected to the frame 111 via the connector 113 rotator, and the other end is movably disposed relative to the frame 111. When the lattice hoop plate 10 is fully loaded, the hoop plate units 1121 are in an open position, connecting the two ends of the hoop plate mounting holes 1112 on the frame 111. The hoop plate units 1121 extend along the lifting direction of the hoop plate assembly 11, and the connector 113 is placed flat above the frame 111, thereby reducing the resistance encountered by the hoop plate assembly 11 during its lifting movement.

[0074] Step S20, driving the pile legs 30 of the offshore jack-up platform 100 to sink and pass through the pile leg avoidance holes 1111 of the hoop assembly 11 until the pile legs 30 are installed on the seabed formation;

[0075] Furthermore, after the lattice hoop plate 10 is installed, the pile legs 30 are driven downward to be inserted into the seabed, thereby supporting the platform body 20 above the sea surface by the pile legs 30. Specifically, in some embodiments of the installation method of the offshore jack-up platform 100 of the present invention, the step of driving the pile legs 30 downward to pass through the pile leg avoidance holes 1111 of the hoop plate assembly 11 until the pile legs 30 are installed into the seabed stratum includes:

[0076] Step S21: Install the pile legs 30 on the platform body 20 and drive the pile legs 30 through the pile leg avoidance holes 1111 of the lattice hoop plates 10 until the bottom of the pile legs 30 touches the seabed;

[0077] Step S22: the platform body 20 is lifted along the height direction of the pile legs 30 until it leaves the horizontal plane and reaches a preset height;

[0078] Step S23, driving the water pump to pump liquid into the platform body 20 to preload the pile legs 30;

[0079] In step S24 , the pile legs 30 are preloaded and installed on the bottom layer of the seabed, and the liquid pumped by the water pump is discharged from the platform body 20 .

[0080] At this time, by driving the pile legs 30 down and passing through the pile leg avoidance holes 1111 of the hoop plate assembly 11, and pressing each pile leg 30 connected to the platform body 20 into the seabed to a preset depth to meet the bearing capacity requirements, each pile leg 30 can bear the load independently, and the platform can initially rely on the stable foundation on the seabed to bear its own weight and working load, and provide an assembly basis for the further installation of the lattice hoop plate 10.

[0081] In step S30 , the lifting assembly 12 is started to lower the hoop assembly 11 to the seabed along the height direction of the pile leg 30 , and the hoop assembly 11 and the pile leg 30 are fixed.

[0082] Furthermore, after the platform body 20 is fixed by the pile legs 30, the lifting assembly 12 can be controlled to start operation, so that the hoop plate assembly 11 is driven by the lifting assembly 12 to sink to the seabed along the height direction of the pile legs 30, and is clamped and fixed to the pile legs 30 through the connecting parts 113 of the hoop plate assembly 11. In this way, the lattice hoop plate 10 and the pile legs 30 can be combined into an integral structure, and share the load with the pile legs 30, which can not only improve the overall structural stability and load transmission performance, but also prevent the pile legs 30 from settling unevenly to reduce the risk of overturning of the platform body 20, so that the offshore jack-up platform 100 can be applied to various seabed strata working conditions such as soft soil, hard upper and soft lower soil, and uneven soil, thereby improving the scope of application of the offshore jack-up platform 100.

[0083] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A lattice hoop for an offshore jack-up platform, characterized in that: The lattice hoop plate comprises: A hoop assembly, wherein the hoop assembly is provided with a pile leg avoidance hole, and the hoop assembly is used to be detachably connected to the pile leg of the offshore jack-up platform; and a lifting assembly, one end of which is drivingly connected to the hoop assembly, and the other end of which extends upward from the hoop assembly and is used to connect to the platform body of the offshore jack-up platform to drive the hoop assembly to move up and down along the length direction of the lifting assembly; The hoop plate assembly includes a frame body, a hoop plate and a connecting piece. The frame body is provided with the pile leg avoidance hole and is transmission-connected to the lifting assembly. The frame body is used to be detachably connected to the pile leg; the hoop plate is detachably provided on the frame body so as to move up and down along the length direction of the lifting assembly with the frame body. One end of the connecting piece is rotatably connected to the frame body, and the other end is movably provided relative to the frame body for detachably connecting to the pile leg.

2. The lattice hoop plate for an offshore jack-up platform according to claim 1, wherein: A slot is provided at one end of the connecting piece away from the frame for snap-fitting with the pile leg.

3. The lattice hoop plate for an offshore jack-up platform according to claim 1, wherein: The frame is provided with a plurality of hoop plate mounting holes; The hoop plate includes a plurality of hoop plate units, and each of the hoop plate units is embedded in a hoop plate installation hole.

4. The lattice hoop plate for an offshore jack-up platform according to claim 3, wherein: One end of the hoop plate unit is rotatably connected to the frame body to cover or open the hoop plate installation hole.

5. The lattice hoop plate for an offshore jack-up platform according to claim 3, wherein: The hoop plate unit is provided with a plurality of through holes.

6. The lattice hoop plate for an offshore jack-up platform according to any one of claims 1 to 5, characterized in that: The pile leg avoidance holes are arranged in a regular hexagonal shape.

7. The lattice hoop plate for an offshore jack-up platform according to any one of claims 1 to 5, characterized in that: There are a plurality of pile leg avoidance holes, and the plurality of pile leg avoidance holes are arranged at intervals along the circumference of the lattice hoop plate.

8. An installation method, applied to the lattice hoop plate for an offshore jack-up platform as claimed in any one of claims 1 to 7, characterized in that: The installation method comprises the following steps: Loading a lattice hoop plate below the platform body of an offshore jack-up platform; Driving the pile legs of the offshore jack-up platform to sink and pass through the pile leg avoidance holes of the hoop assembly until the pile legs are installed on the seabed formation; The lifting assembly is started to lower the hoop assembly to the seabed along the height direction of the pile legs, and the hoop assembly and the pile legs are fixed.

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