Method for installing a mobile bottom-supported platform

Abstract

A kind of installation method of mobile bottom sitting platform, bottom sitting platform includes platform main body and multiple temporary box, platform main body includes upper box and lower box, the outer contour line of lower box is closed, the outer dimension of lower box is greater than the outer contour dimension of upper box, lower box is connected and supports upper box by multiple first columns, multiple temporary box is vertical column and can be detachably set to the outside of upper box;When installing platform, platform main body and multiple temporary box are assembled into one, platform is migrated to target sea area by wet dragging mode;Water is injected into the ballast tank of temporary box and lower box by ballast system, so that the gravity received by platform main body and multiple temporary box is greater than buoyancy and sinks bottom sitting;The connection between temporary box and platform main body is released;Temporary box is lifted and transferred out of water surface by lifting equipment on upper box, the problem of poor stability in platform installation process is solved, and the ability to resist wind, wave, flow load after platform installation is also improved.

Description

Technical Field

[0001] This invention relates to the field of marine engineering technology, and in particular to a method for installing a mobile bottom-mounted platform. Background Technology

[0002] A hull-mounted platform is a type of offshore platform. Depending on its configuration and equipment, it can be used for long-term offshore construction support, tourism, emergency rescue, observation, communication, and scientific research. During operation, hull-mounted platforms are subjected to wind, wave, and current loads. According to the China Classification Society's "Classification Rules for Offshore Mobile Platforms (2023)," taking the current load calculation formula as an example: F = 1 / 2·CpPwV′A, this load is directly related to the platform's vertical projected area A.

[0003] Mobile seabed platforms typically use multiple pillars for support at the bottom, with a short box at the bottom of each pillar. The platform sits firmly on the seabed by contacting the seabed through the box. However, the friction generated by the multiple short boxes in contact with the seabed is limited.

[0004] In addition, mobile bottom-mounted platforms are usually transported at sea by wet towing during installation. Due to the limited cross-sectional area of ​​the columns, the stability of the platform is poor during wet towing and sinking. Summary of the Invention

[0005] In response to the shortcomings of the existing production technology, the applicant provides an installation method for a mobile platform, which solves the problem of poor stability during platform installation and improves the platform's ability to resist wind, waves, and current loads after installation.

[0006] The technical solution adopted in this invention is as follows:

[0007] A method for installing a mobile platform, the platform comprising a platform body and multiple temporary boxes, the platform body comprising an upper box and a lower box, the outer perimeter of the lower box being closed, the outer perimeter of the lower box being larger than the outer perimeter of the upper box, and also comprising multiple first columns, the lower box being connected to and supporting the upper box via the first columns, the multiple temporary boxes being detachably mounted on the outside of the upper box, the multiple temporary boxes being vertical columns;

[0008] Installation methods include:

[0009] Installation platform:

[0010] The main platform and multiple temporary containers are assembled into one unit, and the platform is moved to the target sea area by wet towing. At this time, the horizontal plane is located outside the lower end of the temporary containers.

[0011] Water is injected into the ballast tanks of the temporary tanks and the lower hull through the ballast system, so that the gravity received by the platform main body and the plurality of temporary tanks is greater than the buoyancy, and the platform sinks and sits on the seabed;

[0012] Disconnecting the connection between the temporary tanks and the platform main body;

[0013] Through the hoisting equipment installed on the upper hull, the temporary tanks are hoisted and then transferred out of the water surface.

[0014] A further technical solution is:

[0015] The middle part of the lower hull is provided with a hollow structure penetrating through the upper and lower surfaces of the lower hull.

[0016] The cross section of the lower hull is in a shape of a Chinese character 'hui' (a hollow square) or a Chinese character 'tian' (grid).

[0017] The first column has a truss structure.

[0018] It further comprises a second column, which is a vertical column, configured to connect the upper hull and the lower hull, and serve as a passage for entering and exiting the upper hull and the lower hull.

[0019] The installation method further comprises:

[0020] Disassembly and installation:

[0021] Transferring the plurality of temporary tanks to one side of the platform main body, and hoisting the temporary tanks to enter the water through the hoisting equipment;

[0022] Water is injected into the ballast tanks of the temporary tanks through the ballast system, so that the hoisting equipment always provides hoisting force during the water entering process of the temporary tanks until the lower end of the temporary tanks is connected with the lower hull;

[0023] Then connecting the upper end of the temporary tanks with the upper hull;

[0024] The water in the ballast tanks of the temporary tanks and the lower hull is drained outwards simultaneously through the ballast system, so that the platform floats up until the water surface is located outside the lower end of the temporary tanks;

[0025] The platform is towed in wet condition to the next destination.

[0026] A plurality of lower bases corresponding to the temporary tanks one by one are fixedly installed on the lower hull, an upper base is connected to the upper hull through a base driving mechanism, the upper end of a single temporary tank is matched with the upper base, and the lower end of the single temporary tank is matched with the lower base;

[0027] When disconnecting the connection between the temporary tanks and the platform main body:

[0028] The base drive mechanism drives the upper base to move upward, disconnecting the upper base from the upper end of the single temporary box. Then, the base drive mechanism drives the upper base to rotate and enter the base recovery compartment outside the upper box.

[0029] When the upper end of the temporary housing is connected to the upper housing:

[0030] After the lower base is connected to the lower end of the temporary container, the base drive mechanism drives the upper base to rotate from inside the base recovery compartment to the outside of the upper base;

[0031] The base drive mechanism drives the upper base to move downward, so that the upper base connects with the upper end of the temporary box, and then connects the temporary box to the platform body.

[0032] The structure of the upper base is as follows: it includes a first base body, which is a shell structure with the opening facing downwards. A first buffer sand box is provided at the bottom of the first base body, a first buffer pad is provided on the inner side wall of the first base body, and a first conical guide ring with the opening facing downwards is provided at the lower part of the first base body. The first conical guide ring cooperates with the upper end of a single temporary box.

[0033] The structure of the lower base is as follows: it includes a second base body, which is a shell structure with an upward opening. A second buffer sand box is provided at the bottom of the second base body, a second buffer pad is provided on the inner side wall of the second base body, and a second conical guide ring with an upward opening is provided at the upper part of the second base body. The second conical guide ring cooperates with the lower end of a single temporary box.

[0034] The base drive mechanism comprises a steering shaft installed in the base recovery compartment and a connecting arm, one end of which is connected to the steering shaft and the other end of which is mounted on the upper base.

[0035] It also includes a hydraulic drive mechanism installed on the base recovery compartment, the hydraulic drive mechanism being used to drive the steering shaft to rotate about its own axis and to move up and down along its own axis.

[0036] The structure of a single temporary container is as follows: it includes a hollow columnar container structure, with an upper connector installed at the upper end of the container structure and a lower connector installed at the lower end of the container structure;

[0037] The upper connector mates with the upper base, and the lower connector mates with the lower base.

[0038] The beneficial effects of this invention are as follows:

[0039] This invention features a compact and reasonable structure, and is easy to operate. By setting up a lower box in the overall structure, the contact area between the platform and the seabed is increased. Multiple temporary boxes can be detached and installed on the main body of the platform, which improves the stability of the platform during wet towing and sinking to the bottom, and enhances the platform's ability to resist wind, wave, and current loads after installation.

[0040] Furthermore, the present invention also has the following advantages:

[0041] (1) The hollow structure in the middle of the lower box avoids the upward force caused by the low pressure area formed by the water flow bypassing the column from acting on the platform structure, thereby avoiding the decrease of the wet weight of the platform, maintaining a large friction force when the platform is on the bottom, and making it more resistant to slippage.

[0042] (2) The lower box is connected to and supports the upper box through the first truss-type column, which reduces the horizontal thrust of waves on the platform and greatly improves the platform's anti-slip ability, making the platform more stable. In addition, the truss-type column also prevents waves from climbing up the column, reduces the possible impact force of waves on the upper box, and improves the structural safety of the platform. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of the mounting platform of the present invention.

[0044] Figure 2 This is a side view of the mounting platform of the present invention.

[0045] Figure 3 This is a schematic diagram (a) illustrating the installation process of the platform of the present invention.

[0046] Figure 4 This is a schematic diagram (II) illustrating the installation process of the platform of the present invention.

[0047] Figure 5 This is a schematic diagram (III) illustrating the installation process of the platform of the present invention.

[0048] Figure 6 This is a schematic diagram (IV) illustrating the installation process of the platform of the present invention.

[0049] Figure 7 This is a schematic diagram (V) illustrating the installation process of the platform of the present invention.

[0050] Figure 8 This is a front view of the mounting platform of the present invention.

[0051] Figure 9 This is a top view of the mounting platform of the present invention.

[0052] Figure 10 This is a schematic diagram (top view) of the base drive mechanism of the present invention.

[0053] Figure 11This is a schematic diagram (front view) of the base drive mechanism of the present invention.

[0054] Figure 12 This is a schematic diagram of the temporary housing structure of the present invention.

[0055] Figure 13 This is a schematic diagram of the structure of the base of the present invention.

[0056] Figure 14 This is a schematic diagram of the structure of the lower base of the present invention.

[0057] in:

[0058] 1. Upper housing; 11. Upper base; 111. First conical guide ring; 112. First buffer sand box; 113. First buffer pad; 12. Base recovery compartment; 13. Base drive mechanism; 131. Steering shaft; 132. Connecting arm; 14. Lifting equipment;

[0059] 2. First column; 3. Second column;

[0060] 4. Lower housing; 41. Lower base; 411. Second conical guide ring; 412. Second buffer sandbox; 413. Second buffer pad;

[0061] 5. Temporary enclosure; 51. Upper connector; 52. Lower connector. Detailed Implementation

[0062] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0063] Example 1:

[0064] like Figure 1 As shown, the mobile platform in this embodiment includes a platform body and multiple temporary boxes 5. The platform body includes an upper box 1 and a lower box 4. The outer perimeter of the lower box 4 is closed. The outer perimeter of the lower box 4 is larger than the outer perimeter of the upper box 1. It also includes multiple first columns 2. The lower box 4 is connected to and supports the upper box 1 through the first columns 2. Multiple temporary boxes 5 are detachably set on the outside of the upper box 1. The multiple temporary boxes 5 are vertical columns.

[0065] like Figures 3-7 As shown, the installation method of the mobile platform includes:

[0066] Installation platform:

[0067] The main body of the platform and multiple temporary containers 5 are assembled into one unit, and the platform is moved to the target sea area by wet towing. At this time, the horizontal plane is located on the lower outer side of the temporary container 5.

[0068] Water is injected into the ballast tanks of the temporary container 5 and the lower container 4 through the ballast system, so that the gravity of the main body of the platform and the multiple temporary containers 5 is greater than the buoyancy, and the platform sinks and sits on the bottom.

[0069] Disconnect the temporary container 5 from the main platform;

[0070] The temporary container 5 is lifted and moved out of the water using the lifting equipment 14 installed on the upper container 1.

[0071] The upper box 1 provides living, work, and meeting spaces for staff. While conventional platform columns support multiple short boxes that are discontinuous, the lower box 4 in this embodiment has a closed outer contour, meaning it is a continuous support structure, forming a single, large unit. Compared to existing technologies, the lower box 4 in this embodiment increases the contact area between the platform and the seabed, improving the platform's anti-slip capability. Furthermore, the continuous structure of the lower box 4 allows for the installation of sufficient ballast tanks, enabling the platform to sit on the seabed without relying on anchoring or piling, allowing it to operate even in hard seabed areas where piling and anchoring are difficult, thus broadening its applicability.

[0072] The temporary container 5 is a cylindrical or polyhedral column with ballast tanks inside. The temporary container 5 increases the waterline area during platform relocation, providing stability. After relocation, it is unloaded and recycled, not connected to the platform. The outer perimeter of the lower container 4 is larger than that of the upper container 1. A lifting device 14 is installed on the upper deck of the upper container 1, and the temporary container 5 is located on the outside of the upper container 1. This structure facilitates loading and unloading of the temporary container 5 on the platform, making operation more convenient. The temporary container 5 can be lifted using its own lifting device 14 without the need for a large floating crane, thus reducing construction costs. During platform installation, a small waterline area will result in low stability and a risk of capsizing. By setting up the temporary container 5, which is only used during installation, the platform's waterline area is increased, ensuring construction safety during the platform installation phase. To prevent the temporary container 5 from colliding with the main platform and damaging the structure during installation and dismantling, the outer perimeter of the temporary container 5 is wrapped with flexible materials such as rubber.

[0073] By setting up the lower box 4 of the overall structure, the contact area between the platform and the seabed is increased. Multiple temporary boxes 5 can be detached and installed on the main body of the platform, which improves the stability of the platform during wet towing and sinking to the bottom, and enhances the platform's ability to resist wind, wave and current loads after installation.

[0074] Furthermore, such as Figure 1 As shown, a hollow structure is provided in the middle of the lower box 4, running through the upper and lower surfaces of the lower box 4. Specifically, the cross-section of the lower box 4 can be set to be a square or a grid shape.

[0075] The hollow structure in the middle of the lower box 4 prevents the upward force caused by the water flow bypassing the low pressure area formed by the column from acting on the platform structure, thereby preventing the platform's wet weight from decreasing, maintaining a large friction force when the platform is on the bottom, and making it more resistant to slippage.

[0076] Furthermore, such as Figure 1 As shown, the first column 2 has a truss structure.

[0077] The lower box 4 is connected to and supports the upper box 1 through the truss-type first column 2, which reduces the horizontal thrust of waves on the platform and greatly improves the platform's anti-slip ability, thus making the platform more stable. In addition, the truss-type column also prevents waves from climbing up the column, reduces the possible impact force of waves on the upper box 1, and improves the structural safety of the platform.

[0078] The first column 2 of the truss type is made of steel pipes with a relatively small diameter, which makes the stability of the platform body worse during wet towing and bottoming. However, the temporary box 5 that can be detached and installed on the platform body in this embodiment can make up for the lack of stability caused by the truss type column. A sufficient number of temporary boxes 5 can be used to increase the waterline area of ​​the platform and achieve the optimization of the platform structure.

[0079] Furthermore, such as Figures 1-2 As shown, it also includes a second column 3, which is a vertical column used to connect the upper box 1 and the lower box 4, and serves as a passage for entering and exiting the upper box 1 and the lower box 4.

[0080] Specifically, the second column 3 is a cylindrical or polyhedral column with an internal maintenance passage that connects to the openings reserved at corresponding positions in the lower housing 4 and the upper housing 1, facilitating personnel to descend into the lower housing 4 for maintenance.

[0081] Preferably, the temporary enclosure 5 is located near the first column 2 to compensate for the small waterline area at the first column 2. The number and distribution of the first column 2 and the second column 3 should be adapted to the overall shape and center of gravity of the platform, such as... Figure 9 As shown, the outer contours of the lower box 4 and the upper box 1 are both squares. The first column 2 and the second column 3 are set diagonally. There are four temporary boxes 5, with two temporary boxes 5 set on the outside of each first column 2.

[0082] In addition, the installation methods for mobile seating platforms also include:

[0083] Uninstall:

[0084] Multiple temporary containers 5 were transferred to one side of the main platform, and the temporary containers 5 were lifted into the water using the lifting equipment 14.

[0085] Water is injected into the ballast tank of the temporary container 5 through the ballast system, so that the lifting equipment 14 continuously provides lifting force during the water entry process of the temporary container 5 until the lower end of the temporary container 5 is connected to the lower container 4.

[0086] Then connect the upper end of the temporary box 5 to the upper box 1;

[0087] The ballast tanks of the temporary container 5 and the lower container 4 are simultaneously drained outward by the ballast system, so that the platform floats to the water surface and is located on the lower outer side of the temporary container 5.

[0088] The platform is moved to its next destination using a wet mopping method.

[0089] Specifically, during the installation and dismantling of the mobile bottom platform, the water surface located at the lower outer side of the temporary container 5 means that when floating at sea, the waterline area is the sum of the cross-sectional areas of the temporary container 5, the first column 2, and the second column 3.

[0090] Example 2:

[0091] In Embodiment 1, the temporary container 5 is detachably connected to the platform body. This can be achieved in various ways, such as by using a pin structure to connect the upper and lower ends of the temporary container 5 to the upper container 1 and lower container 4 respectively. Alternatively, a combination of horizontal and vertical limiting structures on the platform body can be used to detachably connect the temporary container 5 to the platform body. Specific implementations are as follows:

[0092] like Figures 8-10 As shown, the upper box 1 is box-shaped, and two square base recovery compartments 12 are opened on the side of the truss-type first column 2. Each base recovery compartment 12 is equipped with two base drive mechanisms 13. The number of base drive mechanisms 13 is the same as the number of temporary boxes 5. Lifting equipment 14 is installed on the deck above the base recovery compartment 12.

[0093] Multiple lower bases 41, each corresponding to a temporary box 5, are fixedly installed on the lower box 4. An upper base 11 is connected to the upper box 1 via a base drive mechanism 13. The upper end of a single temporary box 5 engages with the upper base 11, and the lower end of a single temporary box 5 engages with the lower base 41.

[0094] Specifically, after the upper base 11 contacts the upper end of the temporary box 5, it is used to limit the horizontal direction of the temporary box 5. After the lower base 41 contacts the lower end of the temporary box 5, it is used to limit the horizontal direction of the temporary box 5. When the upper base 11 and the lower base 41 are coaxial with the temporary box 5 at the same time, they limit the vertical position of the temporary box 5 from both the upper and lower ends of the temporary box 5, thus connecting the temporary box 5 to the platform body.

[0095] When disconnecting the temporary container 5 from the main platform:

[0096] The base drive mechanism 13 drives the upper base 11 to move upward, disconnecting the upper base 11 from the upper end of the single temporary box 5. Then, the base drive mechanism 13 drives the upper base 11 to rotate and enter the base recovery compartment 12 outside the upper box 1.

[0097] When the upper end of the temporary housing 5 is connected to the upper housing 1:

[0098] After the lower base 41 is connected to the lower end of the temporary container 5, the base drive mechanism 13 drives the upper base 11 to rotate from inside the base recovery compartment 12 to the outside of the upper base 11.

[0099] The base drive mechanism 13 drives the upper base 11 to move down, so that the upper base 11 is connected to the upper end of the temporary box 5, and then the temporary box 5 is connected to the platform body.

[0100] Furthermore, such as Figures 13-14 As shown, the structure of the upper base 11 is as follows: it includes a first base body, which is a shell structure with the opening facing downwards. A first buffer sand box 112 is provided at the bottom of the first base body, a first buffer pad 113 is provided on the inner side wall of the first base body, and a first conical guide ring 111 with the opening facing downwards is provided at the lower part of the first base body. The first conical guide ring 111 cooperates with the upper end of a single temporary box 5.

[0101] The structure of the lower base 41 is as follows: it includes a second base body, which is a shell structure with an upward opening. A second buffer sand box 412 is provided at the bottom of the second base body, a second buffer pad 413 is provided on the inner side wall of the second base body, and a second conical guide ring 411 with an upward opening is provided at the upper part of the second base body. The second conical guide ring 411 cooperates with the lower end of a single temporary box 5.

[0102] Furthermore, such as Figures 10-11 As shown, the base drive mechanism 13 has a structure including a steering shaft 131 installed in the base recovery chamber 12, and a connecting arm 132. One end of the connecting arm 132 is connected to the steering shaft 131, and the other end of the steering shaft 131 is installed on the base 11.

[0103] It also includes a hydraulic drive mechanism installed on the base recovery chamber 12, which is used to drive the steering shaft 131 to rotate around its own axis and to move up and down along its own axis.

[0104] The hydraulic drive mechanism can be implemented by combining two action mechanisms. One is a hydraulic lifting mechanism installed at the bottom of the base recovery chamber 12, and the other is a hydraulic rotating mechanism installed at the movable end of the hydraulic lifting mechanism. The rotating end of the hydraulic rotating mechanism is connected to the steering shaft 131. The hydraulic lifting mechanism is used to drive the hydraulic rotating mechanism, the steering shaft 131, and the connecting arm 132 to lift as a whole. The hydraulic rotating mechanism is used to drive the steering shaft 131 and the connecting arm 132 to rotate. The specific implementation method is the prior art, and will not be described in detail in this embodiment.

[0105] Furthermore, such as Figure 12 As shown, the structure of a single temporary box 5 is as follows: it includes a hollow columnar box structure, with an upper connector 51 installed at the upper end of the box structure and a lower connector 52 installed at the lower end of the box structure.

[0106] The upper connector 51 mates with the upper base 11, and the lower connector 52 mates with the lower base 41.

[0107] For the upper base 11, the first buffer sand box 112 at the bottom of the first base body is used to reduce the upward impact force of the temporary box 5, and the first buffer pad 113 on the side can be rubber or other flexible materials to reduce the lateral impact force of the temporary box 5. The two buffer devices work together to protect the connection structure and extend the service life of the components. The first conical guide ring 111 makes the lower part of the upper base 11 flared, which facilitates the insertion of the upper connector 51 of the temporary box 5 into the first base body.

[0108] For the lower base 41, the second buffer sand box 412 at the bottom of the second base body is used to reduce the downward impact force of the temporary box 5. The second buffer pad 413 on the side can be rubber or other flexible materials to reduce the lateral impact force of the temporary box 5. The two buffer devices work together to protect the connection structure and extend the service life of the components. The second conical guide ring 411 makes the upper part of the lower base 41 flared, which facilitates the insertion of the lower connector 52 of the temporary box 5 into the second base body.

[0109] The installation method of the mobile platform in this embodiment allows the platform to operate and relocate freely in multiple locations through installation and removal.

[0110] like Figures 3-7 As shown, the installation process includes the following steps:

[0111] 1) After assembling the main platform and multiple temporary containers 5 into one unit, the entire platform is moved to its destination by wet towing;

[0112] 2) Water is injected into the ballast tanks in the lower box 4 and the temporary box 5 through the ballast system, so that the platform sinks and sits on the bottom. When injecting water, the amount of water injected into the temporary box 5 should be relatively large to ensure that it exerts pressure on the lower base 41 and prevents the temporary box 5 from floating up when it moves to the upper base 11, making it difficult to detach from the upper base 11.

[0113] 3) Start the base drive mechanism 13 to drive the upper base 11 to move upward, so that the temporary box 5 is separated from the upper base 11. Then the base drive mechanism 13 drives the upper base 11 to rotate and enter the base recovery compartment 12 outside the upper box 1.

[0114] 4) Connect the temporary container 5 to the lifting equipment 14 with slings. Under the traction of the lifting equipment 14 and with the assistance of drainage of the temporary container 5, lift the temporary container 5 and transfer it to the tugboat or its own deck for storage. The platform installation is now complete.

[0115] Uninstallation is the reverse process of installation, and includes the following steps:

[0116] 1) Connect the temporary container 5 to the lifting equipment 14 with slings on the deck of the tugboat or platform and lift it into the water;

[0117] 2) Open the ballast system to fill the ballast tank of the temporary container 5 with water, and slowly insert it into the lower base 41 under the traction of the lifting equipment 14 and the second conical guide ring 411.

[0118] 3) Continue to inject water into the temporary box 5. The lifting force increases due to the increase in the wet weight of the temporary box 5 until the temporary box 5 is in complete contact with the lower base 41, at which point the lifting force reaches its maximum.

[0119] 4) Lower the hoisting height appropriately, remove the sling tension, and then start the base drive mechanism 13 to rotate the steering shaft 131 to extend the upper base 11. Then, the base drive mechanism 13 drives the steering shaft 131 and the connecting arm 132 to rise and fall as a whole, and guides the upper end of the temporary box 5 to be inserted into the upper base 11 through the first conical guide ring 111, thus completing the fixation of the temporary box 5 to the platform.

[0120] 5) The lower housing 4 and the temporary housing 5 are drained together, causing the platform to float to the required draft for relocation. The installation is then completed, and the platform can be moved to the next destination.

[0121] The installation method of the mobile seabed platform in this embodiment has the advantages of low wind and wave load, convenient maintenance, wide applicability, and low construction cost. Depending on the equipment carried, it can realize functions such as long-term offshore construction support, tourism, emergency rescue, observation, communication and scientific research.

[0122] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A method for installing a mobile mounting platform, characterized in that: The platform includes a platform body and multiple temporary boxes (5). The platform body includes an upper box (1) and a lower box (4). The outer perimeter of the lower box (4) is closed. The outer perimeter of the lower box (4) is larger than the outer perimeter of the upper box (1). The platform also includes multiple first columns (2). The lower box (4) is connected to and supports the upper box (1) through the first columns (2). Multiple temporary boxes (5) are detachably set on the outside of the upper box (1). The multiple temporary boxes (5) are vertical columns. Installation methods include: Installation platform: The platform body and multiple temporary containers (5) are assembled into one unit, and the platform is moved to the target sea area by wet towing. At this time, the horizontal plane is located outside the lower end of the temporary container (5). Water is injected into the ballast tanks of the temporary container (5) and the lower container (4) through the ballast system, so that the gravity of the platform body and the multiple temporary containers (5) is greater than the buoyancy, and the platform sinks and sits on the bottom. Disconnect the temporary container (5) from the main platform; The temporary container (5) is lifted and moved out of the water using the lifting equipment (14) installed on the upper container (1); The temporary container (5) is a cylindrical or polyhedral column with ballast tanks inside; The first column (2) has a truss structure. The temporary box (5) is located on the side of the first column (2) to compensate for the small waterline area at the first column (2). Two square base recovery compartments (12) are opened on the upper box (1) on the side of the first column (2). Each base recovery compartment (12) is equipped with a base drive mechanism (13). The number of base drive mechanisms (13) is the same as the number of temporary boxes (5). Lifting equipment (14) is set on the deck above the base recovery compartment (12). The lower housing (4) is fixedly equipped with multiple lower bases (41) corresponding one-to-one with the temporary housing (5). The upper housing (1) is connected to the upper base (11) through the base drive mechanism (13). The upper end of a single temporary housing (5) is engaged with the upper base (11), and the lower end of a single temporary housing (5) is engaged with the lower base (41). Installation methods also include: Uninstall: Multiple temporary containers (5) are transferred to one side of the main platform and lifted into the water using lifting equipment (14); Water is injected into the ballast tank of the temporary container (5) through the ballast system, so that the lifting equipment (14) continuously provides lifting force during the water entry process of the temporary container (5) until the lower end of the temporary container (5) is connected to the lower container (4). Then connect the upper end of the temporary box (5) to the upper box (1); The ballast tanks of the temporary container (5) and the lower container (4) are simultaneously drained outward by the ballast system, so that the platform floats to the water surface and is located on the lower outer side of the temporary container (5); The platform will be moved to its next destination using a wet mopping method. When disconnecting the temporary enclosure (5) from the main platform: The base drive mechanism (13) drives the upper base (11) to move upward, disconnecting the upper base (11) from the upper end of the single temporary box (5). Then the base drive mechanism (13) drives the upper base (11) to rotate into the base recovery compartment (12) outside the upper box (1). When the upper end of the temporary housing (5) is connected to the upper housing (1): After the lower base (41) is connected to the lower end of the temporary box (5), the base drive mechanism (13) drives the upper base (11) to rotate from inside the base recovery compartment (12) to the outside of the upper base (11); The base drive mechanism (13) drives the upper base (11) to move down, so that the upper base (11) is connected to the upper end of the temporary box (5), and then the temporary box (5) is connected to the platform body.

2. The installation method of a mobile seating platform as described in claim 1, characterized in that: The lower box (4) is provided with a hollow structure that runs through the upper and lower surfaces of the lower box (4) in the middle.

3. The installation method of a mobile seating platform as described in claim 2, characterized in that: The cross-section of the lower box (4) is shaped like a square or a grid.

4. The installation method of a mobile seating platform as described in claim 1, characterized in that: It also includes a second column (3), which is a vertical column used to connect the upper box (1) and the lower box (4) and to serve as a passage for entering and exiting the upper box (1) and the lower box (4).

5. The installation method of a mobile seating platform as described in claim 1, characterized in that: The structure of the upper base (11) is as follows: it includes a first base body, which is a shell structure with the opening facing downward. A first buffer sand box (112) is provided at the bottom of the first base body, a first buffer pad (113) is provided on the inner side wall of the first base body, and a first conical guide ring (111) with the opening facing downward is provided at the lower part of the first base body. The first conical guide ring (111) cooperates with the upper end of a single temporary box (5). The structure of the lower base (41) is as follows: it includes a second base body, which is a shell structure with an upward opening. A second buffer sand box (412) is provided at the bottom of the second base body, a second buffer pad (413) is provided on the inner side wall of the second base body, and a second conical guide ring (411) with an upward opening is provided at the upper part of the second base body. The second conical guide ring (411) cooperates with the lower end of a single temporary box (5).

6. The installation method of a mobile seating platform as described in claim 1, characterized in that: The base drive mechanism (13) has a structure including a steering shaft (131) installed in the base recovery compartment (12) and a connecting arm (132). One end of the connecting arm (132) is connected to the steering shaft (131), and the other end of the steering shaft (131) is installed on the upper base (11). It also includes a hydraulic drive mechanism installed on the base recovery chamber (12), which is used to drive the steering shaft (131) to rotate about its own axis and to move up and down along its own axis.

7. The installation method of a mobile mounting platform as described in claim 1, characterized in that: The structure of a single temporary box (5) is as follows: it includes a hollow columnar box structure, with an upper connector (51) installed at the upper end of the box structure and a lower connector (52) installed at the lower end of the box structure. The upper connector (51) mates with the upper base (11), and the lower connector (52) mates with the lower base (41).

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