A deepwater modular adaptive submerged construction platform and construction method thereof

Abstract

The present invention provides a deepwater modular adaptive submerged construction platform and a construction method thereof. The platform structure includes: a bottom module, a blade foot for facilitating the insertion of the bottom module into the seabed soil, a pumping and drainage pipeline, a pumping and drainage device for extracting water and gas substances in the cavity of the bottom module, a number of standard modules, a sluice, a lifting fulcrum, a self-lifting bracket, a work surface, and a crane. The platform structure of the present invention can be used as a construction platform for underwater structures of large offshore projects. The height of the crane can be adjusted by self-moving the self-lifting bracket, reducing dependence on lifting vessels, especially reducing the tonnage demand for lifting equipment, and greatly saving equipment expenses; the method is applicable to different water depths and has a wide range of applications; most of the platform structure can be recycled after the construction is completed for reuse, saving resources.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater foundation construction of large offshore structures, and in particular to a deepwater modular self-adaptive sinking construction platform and a construction method thereof. Background Art

[0002] In the construction of underwater foundation structures of large offshore projects, due to the distance from land, many construction equipment and construction materials cannot be transported by land machinery by setting up temporary piers, etc. In the existing technology, floating cranes, barges, etc. are mainly used for on-site construction and material turnover. Therefore, the construction method of on-site hoisting of prefabricated components is more common in offshore engineering construction.

[0003] Normally, fully revolving floating cranes with high flexibility and the ability to lift large components are often used, but the rental and manufacturing costs of the ships are high. In the sea where weather conditions are changeable, the construction window is extremely rare, and large ships cannot guarantee effective working hours, which also greatly increases the equipment costs of the project. At the same time, offshore structures are greatly affected by meteorological conditions such as ocean currents during construction, and a highly stable structure must be formed as soon as possible to resist the intrusion of complex hydrological factors. This also requires that the safety and reliability of the constructed parts of the offshore structure should be considered during the construction process when construction is forced to be interrupted. Summary of the invention

[0004] The present invention aims to solve the deficiencies of the prior art and provides a deep-water modular self-adaptive submersible construction platform and a construction method thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A deepwater modular adaptive submerged construction platform, comprising:

[0007] The bottom module is a box-shaped structure without a top or a bottom, and a cavity opening downward is provided in the side wall of the bottom module;

[0008] The blade foot facilitates the insertion of the bottom module into the seabed soil, and the blade foot is fixedly connected to the bottom of the bottom module;

[0009] An exhaust pipe connected to the cavity of the bottom module;

[0010] The extraction device is connected to the extraction pipeline and is used to extract the substances in the cavity of the bottom module;

[0011] A plurality of standard modules, wherein the standard modules are box-shaped structures without top and bottom, wherein the plurality of standard modules are stacked together and the bottom standard module is placed on the bottom module, and the two adjacent standard modules and the standard module and the bottom module are all connected in an airtight manner, and a through hole is provided in the standard module for the passage of the extraction and exhaust pipe;

[0012] A water gate is provided on the bottom module or the standard module to control the connection and disconnection between the space enclosed by the bottom module and the standard module and the external space;

[0013] Lifting fulcrum, the lifting fulcrum is located inside the standard module;

[0014] Self-lifting bracket, the self-lifting bracket includes at least two layers of support frames, two adjacent layers of support frames are connected by hydraulic jacks, and each layer of support frames is equipped with a joint in cooperation with the lifting fulcrum;

[0015] The working table is set up on the top of the self-lifting bracket, and pile holes are provided on the working table to facilitate the piling operation;

[0016] Hoist, the hoist is located on the work surface.

[0017] Furthermore, a cavity opening downward is provided in the side wall of the standard module, and partitions for dividing the cavity into a plurality of cells are provided in the cavities of the bottom module and the standard module, and the exhaust pipe is connected to the inner cavity of each cell through a hole at the top of each cell.

[0018] Furthermore, the extraction pipeline includes a horizontally arranged annular pipe, the bottom of the annular pipe is connected to each unit cell respectively, the top of the annular pipe is connected to the extraction equipment through a plurality of lead-out pipes, and the standard module is provided with a through hole for the lead-out pipe to pass through.

[0019] Furthermore, a manhole is provided on the partition of the standard module to facilitate the passage of construction workers.

[0020] Furthermore, at least one sealed door is provided on the inner side of the standard module to facilitate construction workers to enter the inner cavity of the side wall of the standard module.

[0021] Furthermore, each standard module is provided with two layers of lifting fulcrums, and the lifting fulcrums include an upper fulcrum and a lower fulcrum.

[0022] Furthermore, a track is provided on the work surface, a moving plate is slidably provided on the track, a driving mechanism for driving the moving plate to move and stop on the track is provided on the moving plate, and the crane is located on the moving plate.

[0023] Furthermore, the driving mechanism includes a motor, and an output end of the motor is connected to the track wheel of the moving plate through a reducer.

[0024] A construction method of a deepwater modular adaptive submerged construction platform, the specific steps are as follows:

[0025] Step 1: transport the components of the construction platform structure to the construction site by floating or shipping;

[0026] Step 2: Splice the blade foot, the pumping and drainage pipes and the bottom module on the barge, install a standard module on the bottom module, close the sluice gate between the standard module and the bottom module, and hoist the installed hanging box structure into the water as a whole. Float it with the buoyancy provided by the standard module, and temporarily position the hanging box structure on the water by squeezing it with a tugboat;

[0027] Step 3: Use floating crane to install the second standard module, and install the self-lifting bracket, work surface, moving plate and crane;

[0028] Step 4: Use a crane to coordinate the installation and continue to install standard modules on the existing hanging box structure until the bottom module cuts into the seabed to a certain depth and the top standard module is higher than the height of one bottom module above the high tide level of the sea surface or higher than the depth of the bottom module cutting into the seabed plus 3m above the high tide level of the sea surface. During this period, the buoyancy is adjusted by injecting water into the inner cavity of the standard module. For each layer of standard modules installed, the self-lifting bracket automatically climbs up one section;

[0029] Step 5: Install an exhaust device on one side of the through hole of the top standard module. The exhaust device is connected to the outlet pipe with a curved pipe. After the connection, test run the exhaust device to ensure good air tightness of the pipeline.

[0030] Step 6: Open the sluice gate to connect the space enclosed by the bottom module and the standard module with the external space, start the pumping equipment to pump out the air and water in the cavity of the bottom module to make it a quasi-vacuum state, so that the bottom module continues to cut into the seabed due to the pressure;

[0031] Step 7: close the sluice gate and disconnect the pumping equipment from the outlet pipe, connect the outlet pipe to the grouting equipment, start the grouting equipment to grout, so as to reinforce the soil around the blade foot;

[0032] Step 8: After the grouting is completed, the table cover covering the pile hole on the work table is removed, and the pile driving equipment is hoisted by a crane to carry out underwater pile driving construction;

[0033] Step nine, after the underwater pile foundation construction is completed, the underwater bottom sealing concrete is poured by hanging the concrete pouring conduit with a crane;

[0034] Step 10: After the underwater bottom seal concrete solidifies, use a pump to drain the seawater in the platform structure;

[0035] Step 11, using the inner wall of the standard module as the supporting surface, using a crane to hoist the components, and supporting the base template through the support rods;

[0036] Step 12: Use a crane to lower the concrete pouring conduit and pour the cap concrete in the cap template;

[0037] Step 13: After the cap concrete is cured, the cap formwork is removed and lifted away from the platform by a crane, and then seawater is injected into the platform structure to make the water level inside and outside the platform structure level;

[0038] Step 14: inject seawater into the standard module cavity, and release the bolts connecting the standard module and the bottom module;

[0039] Step 15: drain the seawater in the standard module cavity, float the platform to the sea surface by the buoyancy of the standard module, use a tugboat to temporarily squeeze and fix the platform structure, and use a crane to cooperate with a floating crane to remove the standard modules one by one from top to bottom. After each layer of standard modules is removed, the self-lifting bracket moves down one layer;

[0040] Step 16, when the last layer of standard modules is dismantled, a floating crane is used to dismantle the crane, movable plate, work surface, and self-lifting bracket in sequence, and the last layer of standard modules is lifted onto a barge and transported away from the construction site by a floating crane.

[0041] Furthermore, the climbing method of the self-lifting support in step 4 is:

[0042] In the initial state, the joints of the two-layer support frame are respectively supported on the upper fulcrums of the two adjacent layers of standard modules. When climbing, the crane stops working and moves to the center of the work surface along the track through the moving plate. The joint of the lower layer support frame is separated from the upper fulcrum of the lower layer standard module and the hydraulic jack is started to lift the lower layer support frame until its joint and the lower fulcrum of the upper layer standard module are at the same height, and then the joint of the lower layer support frame is connected to the corresponding lower layer fulcrum; the joint of the upper layer support frame is separated from the upper fulcrum of the standard module and the hydraulic jack is started to lift the upper layer support frame until its joint and the lower fulcrum of the standard module on the upper layer of the standard module are at the same height, and then the joint of the upper layer support frame is connected to the corresponding lower layer fulcrum, and so on and so forth. The same is also applicable when the initial state is that the joints of the two layers of support frames are respectively supported on the lower fulcrums of the two adjacent layers of standard modules;

[0043] The method for moving the self-lifting bracket downward in step 15 is:

[0044] In the initial state, the joints of the two-layer support frame are respectively supported on the upper fulcrums of the two adjacent standard modules. When moving downward, the crane stops working and moves to the center of the worktable along the track through the moving plate. The joint of the upper support frame is detached from the upper fulcrum of the standard module and the hydraulic jack is started to make the upper support frame descend until its joint is at the same height as the lower fulcrum of the standard module, and then the joint of the upper support frame is connected to the corresponding lower fulcrum; then the joint of the lower support frame is detached from the upper fulcrum of the lower standard module and the hydraulic jack is started to make the lower support frame descend until its joint is at the same height as the lower fulcrum of the standard module, and then the joint of the lower support frame is connected to the corresponding lower fulcrum; this process is repeated, and the same is applicable when the initial state is that the joints of the two-layer support frame are respectively supported on the lower fulcrums of the two adjacent standard modules.

[0045] The beneficial effects of the present invention are as follows: the platform structure of the present invention can be used as a construction platform for underwater structures of large offshore projects, and the height of the crane can be adjusted by self-moving the self-lifting bracket, thereby reducing dependence on lifting vessels, especially reducing the tonnage demand for lifting equipment, and greatly saving ship machinery and equipment expenses; the method is applicable to different water depths and has a wide range of applications; most of the platform structure can be recycled after construction for reuse, saving resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a three-dimensional schematic diagram of the construction platform of the present invention from a top-down perspective;

[0047] Figure 2 It is a structural schematic diagram of the bottom module of the construction platform of the present invention;

[0048] Figure 3 This is a schematic structural diagram of a bottom module of a construction platform of the present invention;

[0049] Figure 4 It is a three-dimensional schematic diagram of a standard module of a construction platform of the present invention from a top view;

[0050] Figure 5 This is a three-dimensional schematic diagram of a standard module of a construction platform of the present invention when viewed from above;

[0051] Figure 6 It is a structural schematic diagram of the self-lifting support of the construction platform of the present invention;

[0052] Figure 7 It is a structural schematic diagram of the working table surface of the construction platform of the present invention;

[0053] Figure 8 It is a partial three-dimensional schematic diagram of the construction platform of the present invention from a top-down perspective;

[0054] Fig. 9It is a three-dimensional cross-sectional view of the construction platform of the present invention from a top-down perspective;

[0055] Fig.10 It is a three-dimensional cross-sectional view of the construction platform of the present invention when viewed from above;

[0056] Fig.11 It is a schematic diagram of the construction method of the present invention;

[0057] In the figure: 1- bottom module; 2- partition; 3- blade foot; 4- hole; 5- pumping and exhaust pipe; 6- outlet pipe; 7- standard module; 8- manhole; 9- through hole; 10- sealed door; 11- lower support point; 12- upper support point; 13- pumping and exhaust equipment; 14- self-lifting bracket; 15- hydraulic jack; 16- working table; 17- track; 18- pile hole; 19- moving plate; 20- crane; 21- soil; 22- underwater pile foundation; 23- underwater bottom sealing concrete; 24- support rod; 25- cap template; 26- cap concrete;

[0058] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0059] The present invention will be further described below in conjunction with embodiments:

[0060] A deepwater modular adaptive submerged construction platform, comprising:

[0061] Bottom module 1, the bottom module 1 is a box-shaped structure without a top or a bottom, and a cavity with an opening downward is provided in the side wall of the bottom module 1;

[0062] The blade foot 3 is used to facilitate the insertion of the bottom module 1 into the seabed soil, and the blade foot 3 is fixedly connected to the bottom of the bottom module 1;

[0063] A pumping and exhausting pipe 5, the pumping and exhausting pipe 5 is connected to the cavity of the bottom module 1;

[0064] The extraction device 13 is connected to the extraction pipe 5 and is used to extract the substances in the cavity of the bottom module 1;

[0065] A plurality of standard modules 7, wherein the standard modules 7 are box-shaped structures without top or bottom, wherein the plurality of standard modules 7 are stacked together and the bottom standard module 7 is placed on the bottom module 1, and the two adjacent standard modules 7 and the standard module 7 and the bottom module 1 are all connected in an airtight manner, and a through hole is provided in the standard module 7 for the exhaust pipe 5 to pass through;

[0066] A water gate is provided on the bottom module 1 or the standard module 7 to control the connection between the space enclosed by the bottom module 1 and the standard module 7 and the external space;

[0067] A lifting fulcrum, the lifting fulcrum is located inside the standard module 7;

[0068] A self-lifting bracket 14, the self-lifting bracket 14 comprises at least two layers of support frames, two adjacent layers of support frames are connected by a hydraulic jack 15, each layer of support frames is provided with a joint in cooperation with a lifting fulcrum; the joint comprises a jack, one end of the jack is connected to the support frame and the other end is connected to an active head, and the lifting fulcrum is a support groove provided in cooperation with the active head;

[0069] The work surface 16 is set on the top of the self-lifting bracket 14. The work surface 16 is provided with a pile hole 18 for pile driving. The work surface 16 uses dense steel as the main supporting material, and steel plates are used to reinforce the dense steel on both sides and welded into one body.

[0070] The crane 20 is located on the work surface 16 .

[0071] Furthermore, a cavity opening downward is provided in the side wall of the standard module 7, and partitions 2 for dividing the cavity into a plurality of cells are provided in the cavities of the bottom module 1 and the standard module 7, and the exhaust pipe 5 is connected to the inner cavity of each cell through a hole 4 at the top of each cell.

[0072] Furthermore, adjacent standard modules 7 and the standard modules 7 and the bottom module 1 are connected by bolts.

[0073] Furthermore, the extraction pipeline 5 includes a horizontally arranged annular tube, the bottom of which is connected to each cell respectively, and the top of which is connected to the extraction equipment 13 through a plurality of lead-out pipes 6, and the standard module 7 is provided with a through hole 9 for the lead-out pipe 6 to pass through.

[0074] Furthermore, a manhole 8 is provided on the partition of the standard module 7 for construction workers to pass through.

[0075] Furthermore, at least one sealed door 10 is provided on the inner side of the standard module 7 to facilitate construction workers to enter the inner cavity of the side wall of the standard module 7.

[0076] Furthermore, each standard module 7 is provided with two layers of lifting fulcrums, and the lifting fulcrums include an upper fulcrum 12 and a lower fulcrum 11 .

[0077] Furthermore, a track 17 is provided on the work surface 16 , a moving plate 19 is slidably provided on the track 17 , a driving mechanism for driving the moving plate 19 to move and stop on the track 17 is provided on the moving plate 19 , and a crane 20 is located on the moving plate 19 .

[0078] Furthermore, the driving mechanism includes a motor, and an output end of the motor is connected to the track wheel of the moving plate 19 through a reducer.

[0079] A construction method of a deepwater modular adaptive submerged construction platform, the specific steps are as follows:

[0080] Step 1: transport the components of the construction platform structure to the construction site by floating or shipping;

[0081] Step 2: Splice the blade foot 3, the pumping and exhaust pipe 5 and the bottom module 1 on the barge, install a standard module 7 on the bottom module 1, close the sluice gate between the standard module 7 and the bottom module 1, and hoist the installed hanging box structure into the water as a whole, float it by the buoyancy provided by the standard module 7, and use a tugboat to temporarily position the hanging box structure on the water;

[0082] Step 3: Use floating crane to install the second standard module 7, and install the self-lifting bracket 14, work surface 16, moving plate 19 and crane 20;

[0083] Step 4: Use the crane 20 for coordinated installation, and continue to install the standard modules 7 on the existing hanging box structure until the bottom module 1 cuts into the seabed to a certain depth and the top standard module 7 is higher than the height of one bottom module 1 above the high tide level of the sea surface or higher than the depth of the bottom module 1 cutting into the seabed plus 3m above the high tide level of the sea surface. During this period, the buoyancy is adjusted by injecting water into the inner cavity of the standard module 7. Each time a layer of standard modules 7 is installed, the self-lifting bracket 14 automatically climbs up by one segment;

[0084] Step 5: Install a pumping device 13 on one side of the through hole 9 of the top standard module 7. The pumping device 13 is connected to the outlet pipe 6 by a curved pipe. After the connection, test run the pumping device 13 to ensure good air tightness of the pipeline.

[0085] Step 6: Open the water gate to connect the space enclosed by the bottom module 1 and the standard module 7 to the external space, start the pumping device 13 to pump out the air and water in the cavity of the bottom module 1 to make it a quasi-vacuum state, so that the bottom module 1 continues to cut into the seabed due to the pressure;

[0086] Step 7: close the water gate and disconnect the pumping device 13 from the outlet pipe 6, connect the outlet pipe 6 to the grouting device, start the grouting device to perform grouting, so as to reinforce the soil 21 around the blade foot 3;

[0087] Step 8: After the grouting is completed, the table cover plate covering the pile hole 18 on the work table 16 is removed, and the pile driving equipment is hoisted by the crane 20 to carry out underwater pile driving construction;

[0088] Step nine, after the underwater pile foundation 22 is completed, the underwater bottom sealing concrete 23 is poured by hanging the concrete pouring conduit through the crane 20;

[0089] Step 10: After the underwater bottom seal concrete 23 solidifies, a pump is used to drain the seawater in the platform structure;

[0090] Step 11, using the inner wall of the standard module 7 as a supporting surface, using the crane 20 to hoist the components, and supporting the base template 25 through the support rod 24;

[0091] Step 12: Use the crane 20 to hang the concrete pouring conduit and pour the cap concrete 26 in the cap template 25;

[0092] Step 13: After the cap concrete 26 is cured, the cap formwork 25 is removed and lifted away from the platform by the crane 20, and then seawater is injected into the platform structure to make the water level inside and outside the platform structure level;

[0093] Step 14: inject seawater into the cavity of the standard module 7, and release the bolts connecting the standard module 7 and the bottom module 1;

[0094] Step 15: drain the seawater in the cavity of the standard module 7, float the platform to the sea surface by the buoyancy of the standard module 7, use a tugboat to temporarily squeeze and fix the platform structure, use the crane 20 to cooperate with the floating crane to remove the standard modules 7 one by one from top to bottom, and after each layer of the standard module 7 is removed, move the self-lifting bracket 14 down one layer;

[0095] Step 16, when the last layer of standard modules 7 is removed, a floating crane is used to sequentially remove the crane 20, the movable plate 19, the work surface 16, and the self-lifting bracket 14, and the last layer of standard modules 7 is lifted onto a barge and transported away from the construction site by a floating crane.

[0096] Furthermore, the climbing method of the self-lifting bracket 14 in step 4 is:

[0097] In the initial state, the joints of the two-layer support frame are respectively supported on the upper fulcrums 12 of the two adjacent layers of standard modules 7. When climbing, the crane 20 stops working and moves to the center of the work surface 16 along the track 17 through the moving plate 19. The joint of the lower layer support frame is separated from the upper fulcrum 12 of the lower layer standard module 7 and the hydraulic jack 15 is started to lift the lower layer support frame until its joint is at the same height as the lower fulcrum 11 of the upper layer standard module 7, and then the joint of the lower layer support frame is connected to the corresponding lower layer fulcrum 11; the joint of the upper layer support frame is separated from the upper fulcrum 12 of the standard module 7 and the hydraulic jack 15 is started to lift the upper layer support frame until its joint is at the same height as the lower fulcrum 11 of the standard module 7 on the upper layer of the standard module 7, and then the joint of the upper layer support frame is connected to the corresponding lower layer fulcrum 11, and so on and so forth. The same is applicable when the initial state is that the joints of the two layers of support frames are respectively supported on the lower fulcrums 11 of the two adjacent layers of standard modules 7;

[0098] In step 15, the method for moving the self-lifting bracket 14 downward is as follows:

[0099] In the initial state, the joints of the two-layer support frame are respectively supported on the upper fulcrums 12 of the two adjacent layers of standard modules 7. When moving downward, the crane 20 stops working and moves to the center position of the work table 16 along the track 17 through the moving plate 19. The joint of the upper support frame is separated from the upper fulcrum 12 of the standard module 7 and the hydraulic jack 15 is started to make the upper support frame descend until its joint is at the same height as the lower fulcrum 11 of the standard module 7, and then the joint of the upper support frame is connected to the corresponding lower fulcrum 11; then the joint of the lower support frame is separated from the upper fulcrum 12 of the lower standard module 7 and the hydraulic jack 15 is started to make the lower support frame descend until its joint is at the same height as the lower fulcrum 11 of the standard module 7, and then the joint of the lower support frame is connected to the corresponding lower fulcrum 11; this reciprocating operation is also applicable when the initial state is that the joints of the two-layer support frame are respectively supported on the lower fulcrums 11 of the two adjacent layers of standard modules 7.

[0100] The platform structure of the present invention can be used as a construction platform for underwater structures of large offshore projects. The height of the crane 20 can be adjusted by self-moving the self-lifting bracket 14, reducing dependence on lifting vessels, especially reducing the tonnage demand for lifting equipment, and greatly saving equipment expenses. The method is suitable for different water depths and has a wide range of applications. Most of the platform structure can be recycled after construction for reuse, saving resources.

[0101] The present invention has been exemplarily described above in conjunction with specific embodiments. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A deepwater modular adaptive submerged construction platform, It is characterized in that include: A bottom module (1), the bottom module (1) is a box-shaped structure without a top or a bottom, and a cavity with an opening facing downward is provided in a side wall of the bottom module (1); The blade foot (3) facilitates the insertion of the bottom module (1) into the seabed soil, and the blade foot (3) is fixedly connected to the bottom of the bottom module (1); An exhaust pipe (5), the exhaust pipe (5) being connected to the cavity of the bottom module (1); An extraction device (13), the extraction device (13) is connected to the extraction pipeline (5) and is used to extract substances in the cavity of the bottom module (1); A plurality of standard modules (7), wherein the standard modules (7) are box-shaped structures without a top or a bottom, wherein the plurality of standard modules (7) are stacked together and the bottom standard module (7) is placed on the bottom module (1), wherein two adjacent standard modules (7) and the standard module (7) and the bottom module (1) are connected in an airtight manner, wherein a through hole is provided in the standard module (7) for facilitating the passage of an exhaust pipe (5); wherein a cavity opening downward is provided in the side wall of the standard module (7), wherein the cavity of the bottom module (1) and the standard module (7) are provided with a partition (2) for dividing the cavity into a plurality of cells, wherein the exhaust pipe (5) is connected to the inner cavity of each cell through a hole (4) at the top of each cell; wherein the exhaust pipe (5) comprises a horizontally arranged annular pipe, wherein the bottom of the annular pipe is respectively connected to each cell, and the top of the annular pipe is connected to an exhaust device (13) through a plurality of outlet pipes (6), and wherein the standard module (7) is provided with a through hole (9) for facilitating the passage of the outlet pipe (6); A water gate, which is arranged on the bottom module (1) or the standard module (7) and is used to control the connection and disconnection between the space enclosed by the bottom module (1) and the standard module (7) and the external space; A lifting fulcrum, the lifting fulcrum being located inside the standard module (7); each standard module (7) is provided with two layers of lifting fulcrums, the lifting fulcrums comprising an upper fulcrum (12) and a lower fulcrum (11); A self-lifting support (14), the self-lifting support (14) comprising at least two layers of support frames, two adjacent layers of support frames being connected via a hydraulic jack (15), and each layer of support frames being provided with a joint in cooperation with a lifting fulcrum; A work surface (16), the work surface (16) is erected on the top of the self-lifting bracket (14), and a pile hole (18) is provided on the work surface (16) for facilitating pile driving operations; A crane (20), the crane (20) is located on the work surface (16).

2. The deepwater modular adaptive submerged construction platform according to claim 1, It is characterized in that A manhole (8) is provided on the partition of the standard module (7) to facilitate the passage of construction workers.

3. The deepwater modular adaptive submerged construction platform according to claim 1, It is characterized in that At least one sealed door (10) is provided on the inner side of the standard module (7) to facilitate construction workers to enter the inner cavity of the side wall of the standard module (7).

4. A deepwater modular adaptive submersible construction platform according to any one of claims 1 to 3, It is characterized in that A track (17) is provided on the work surface (16), a moving plate (19) is slidably provided on the track (17), a driving mechanism for driving the moving plate (19) to move and stop on the track (17) is provided on the moving plate (19), and a crane (20) is located on the moving plate (19).

5. The deepwater modular adaptive submerged construction platform according to claim 4, It is characterized in that The driving mechanism comprises a motor, and the output end of the motor is connected to the track wheel of the moving plate (19) via a reducer.

6. A construction method for a deepwater modular adaptive submerged construction platform. It is characterized in that The specific steps are as follows: Step 1: transport the components of the construction platform structure to the construction site by floating or shipping; Step 2: splice the blade foot (3), the pumping and drainage pipe (5) and the bottom module (1) on the barge, install a standard module (7) on the bottom module (1), close the sluice gate between the standard module (7) and the bottom module (1), and hoist the installed hanging box structure into the water as a whole, float it by the buoyancy provided by the standard module (7), and temporarily position the hanging box structure on the water by squeezing it with a tugboat; Step 3, using a floating crane to install the second standard module (7), and installing a self-lifting bracket (14), a work surface (16), a movable plate (19) and a crane (20); Step 4, using a crane (20) for coordinated installation, continuing to install the standard modules (7) on the existing hanging box structure until the bottom module (1) cuts into the seabed to a certain depth and the top standard module (7) is higher than the sea surface at high tide level by more than the height of one bottom module (1) or higher than the sea surface at high tide level by more than the depth of the bottom module (1) cutting into the seabed plus 3m, during which the buoyancy is adjusted by injecting water into the inner cavity of the standard module (7), and each time a layer of standard modules (7) is installed, the self-lifting bracket (14) automatically climbs up by one segment; Step 5: Install a pumping device (13) on one side of the through hole (9) of the top standard module (7), and connect the pumping device (13) to the outlet pipe (6) by using a curved pipe. After the connection, test run the pumping device (13) to ensure that the air tightness of the pipeline is good; Step 6: Open the water gate to connect the space enclosed by the bottom module (1) and the standard module (7) to the external space, and start the pumping device (13) to pump out the air and water in the cavity of the bottom module (1) to make it a quasi-vacuum state, so that the bottom module (1) continues to cut into the seabed due to the pressure; Step 7: close the sluice gate and disconnect the pumping device (13) from the outlet pipe (6), connect the outlet pipe (6) to the grouting device, start the grouting device to perform grouting, so as to reinforce the soil (21) around the blade foot (3); Step eight, after the grouting is completed, the table cover plate covering the pile hole (18) on the work table (16) is removed, and the pile driving equipment is hoisted by a crane (20) to carry out underwater pile driving construction; Step nine, after the construction of the underwater pile foundation (22) is completed, the underwater bottom sealing concrete (23) is poured by hanging a concrete pouring conduit through a crane (20); Step 10, after the underwater bottom seal concrete (23) solidifies, use a pump to drain the seawater in the platform structure; Step eleven, using the inner wall of the standard module (7) as a supporting surface, using a crane (20) to hoist the components, and supporting the base template (25) through a support rod (24); Step 12, using a crane (20) to lower a concrete pouring conduit, and pouring the cap concrete (26) in the cap template (25); Step 13, after the cap concrete (26) has been cured, the cap formwork (25) is removed and lifted away from the platform using a crane (20), and then seawater is injected into the platform structure to make the water level inside the platform structure equal to that outside; Step 14: inject seawater into the cavity of the standard module (7), and simultaneously release the bolts connecting the standard module (7) and the bottom module (1); Step 15, draining the seawater in the cavity of the standard module (7), floating the platform as a whole to the sea surface by the buoyancy of the standard module (7), using a tugboat to temporarily squeeze and fix the platform structure, using a crane (20) in cooperation with a floating crane to remove the standard modules (7) one by one from top to bottom, and after each layer of the standard modules (7) is removed, the self-lifting bracket (14) moves down one layer; Step 16, when the last layer of standard modules 7 is dismantled, a floating crane is used to sequentially dismantle the crane (20), the movable plate (19), the work surface (16), and the self-lifting bracket (14), and the last layer of standard modules (7) is lifted onto a barge and transported away from the construction site by a floating crane.

7. The construction method of the deepwater modular adaptive submerged construction platform according to claim 6, It is characterized in that The climbing method of the self-lifting support (14) in step 4 is: In the initial state, the joints of the two-layer support frame are respectively supported on the upper support points (12) of the two adjacent layers of standard modules (7). When climbing, the crane (20) stops working and moves along the track (17) to the center of the work surface (16) through the moving plate (19). The joint of the lower layer support frame is separated from the upper support point (12) of the lower layer standard module (7) and the hydraulic jack (15) is started to lift the lower layer support frame until its joint is at the same height as the lower support point (11) of the upper layer standard module (7). Then, the joint of the lower layer support frame is aligned with the opposite layer support point (11). The joint of the upper support frame is separated from the upper support point (12) of the standard module (7) and the hydraulic jack (15) is started to raise the upper support frame until its joint is at the same height as the lower support point (11) of the standard module (7) on the upper layer of the standard module (7). Then, the joint of the upper support frame is connected to the corresponding lower support point (11), and this process is repeated. The same is applicable when the joints of the two support frames are respectively supported on the lower support points (11) of the two adjacent standard modules (7) in the initial state. In step 15, the method for lowering the self-lifting bracket (14) is as follows: In the initial state, the joints of the two-layer support frame are respectively supported on the upper support points (12) of the two adjacent layers of standard modules (7). When moving downward, the crane (20) stops working and moves along the track (17) to the center of the work surface (16) through the moving plate (19). The joint of the upper layer support frame is separated from the upper support point (12) of the standard module (7) and the hydraulic jack (15) is started to make the upper layer support frame descend until its joint is at the same height as the lower support point (11) of the standard module (7). Then, the upper layer support frame is lowered. The joint of the lower support frame is connected to the corresponding lower support point (11); then the joint of the lower support frame is separated from the upper support point (12) of the lower standard module (7) and the hydraulic jack (15) is started to lower the lower support frame until its joint and the lower support point (11) of the standard module (7) are at the same height, and then the joint of the lower support frame is connected to the corresponding lower support point (11); this is repeated, and the same is applicable when the initial state is that the joints of the two support frames are supported on the lower support points (11) of the two adjacent standard modules (7).

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