Semi-submersible immersed tube transport and installation integrated vessel and construction technology

Abstract

The present invention discloses a semi-submersible immersed tube transport and installation integrated ship and a construction method, the integrated ship comprises: a deck structure, two floating structures, which can be pressurized and carry water, with the vertical plane where the center line of the length direction of the integrated ship is located as the reference plane, the two floating structures are symmetrically arranged relative to the reference plane, and the two floating structures are arranged in parallel, and the upper parts or top surfaces of the two floating structures are connected by the deck structure; and two supporting mechanisms are arranged on opposite sides of the two floating structures, and the two supporting mechanisms are symmetrically arranged relative to the reference plane, and the supporting mechanisms are arranged at the lower part or bottom of the floating structure; each supporting mechanism further comprises: at least two supporting components and a driving component, and the driving component is used to drive the supporting component to be close to or extend out of the floating structure where it is located. The integrated ship can reduce the draft of the hull after carrying the immersed tube, and can realize the transportation of immersed tubes in shallow water channels.

Description

Technical Field

[0001] The invention belongs to the technical field of underwater tunnel construction, and specifically relates to a semi-submersible immersed tube transport and installation integrated ship and a construction process. Background Art

[0002] Immersed tube tunnels are a structural form commonly used in cross-river and cross-sea tunnels at home and abroad. The successful completion of the super project Hong Kong-Zhuhai-Macao Bridge has promoted the leapfrog development of my country's immersed tube tunnel engineering. Following the Hong Kong-Zhuhai-Macao Bridge project, the construction of super projects such as the Shenzhen-Zhongshan Link and the Dalian Bay Undersea Tunnel has been launched one after another.

[0003] The transportation and installation of immersed tube sections of immersed tube tunnels require special equipment. However, when conventional immersed tube transportation equipment is used to transport the immersed tubes to the diving area, the transportation environment cannot meet the draft requirements of the transportation equipment after carrying the immersed tubes, resulting in the inability of conventional transportation equipment to transport immersed tubes in shallow waters. In order to improve construction efficiency and reduce construction costs, it is necessary to develop a transportation equipment that can realize the transportation of immersed tubes in shallow water channels. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a semi-submersible immersed tube transport and installation integrated vessel and a construction process. The integrated vessel can reduce the draft of the hull after carrying the immersed tube, can realize the transportation of immersed tubes in shallow waterways, reduce the dredging amount of the waterway, can effectively reduce the construction cost, and improve the construction efficiency and economic benefits.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The present invention discloses a semi-submersible immersed tube transport and installation integrated vessel, comprising:

[0007] A deck structure,

[0008] two floating structures capable of pressurizing and carrying water, with a vertical plane on which the centerline of the length direction of the integrated ship is located as a reference plane, the two floating structures being symmetrically arranged relative to the reference plane, and the two floating structures being arranged in parallel, and the upper parts or top surfaces of the two floating structures being connected via the deck structure; and

[0009] Two supporting mechanisms are respectively arranged on opposite sides of the two floating structures, and the two supporting mechanisms are symmetrically arranged relative to the reference plane, and the supporting mechanisms are arranged at the lower part or bottom of the floating structure; each of the supporting mechanisms further comprises:

[0010] at least two support components;

[0011] The driving assembly is used to drive the supporting assembly to be close to or extend out of the floating structure where it is located. When the supporting assembly extends out of the floating structure, the supporting assembly can be supported on the bottom surface of the submerged tube, and the space above the supporting assembly, below the deck structure and between the two floating structures constitutes a carrying space for accommodating the submerged tube.

[0012] In some embodiments, the support assembly further comprises:

[0013] a supporting leg, the top surface of which is used to support the immersed tube; and

[0014] A rotating shaft, vertically arranged, for rotatingly connecting the supporting legs and the floating structure;

[0015] The driving components are arranged in one-to-one correspondence with the supporting legs to drive the supporting legs to rotate around the central axis of the rotating shaft.

[0016] In some embodiments, the end of the rotating shaft is connected to the floating structure through a bearing, and the driving assembly further includes:

[0017] a hydraulic motor, the main body of which is fixedly mounted on the floating structure and the driving shaft of which is vertically arranged;

[0018] a first gear, coaxially arranged with the driving shaft and sleeved and fixed on the driving shaft; and

[0019] A second gear is coaxially arranged with the rotating shaft and sleeved and fixed on the rotating shaft, and the second gear is meshed with the first gear.

[0020] In some of the embodiments, the side wall of the floating structure is provided with a storage groove, the storage groove is arranged one-to-one corresponding to the supporting legs, the rotating shaft is located in the storage groove, and the supporting legs can be rotated into the storage groove along with the rotating shaft.

[0021] In some of the embodiments, a sealed electronic compartment for installing the drive assembly is provided in the floating structure, and the sealed electronic compartment is arranged in a one-to-one correspondence with the drive assembly.

[0022] In some embodiments, the support leg further comprises:

[0023] A mounting seat, fixedly mounted on the side wall of the rotating shaft; and

[0024] A jack, the cylinder bottom is fixedly mounted on the top surface of the mounting seat, and the piston rod is arranged vertically upward.

[0025] In some embodiments, a backing plate is fixedly mounted on the top surface of the piston rod.

[0026] In some embodiments, the pad is a rubber plate.

[0027] In some of the embodiments, the deck structure is fixedly connected to the floating structure via a detachable truss connection structure.

[0028] In some of the embodiments, the truss connection structure includes an upper connection plate structure, a truss structure and a lower connection plate structure, the upper connection plate structure is connected to the deck structure, and the lower connection plate structure is connected to the floating structure.

[0029] In some of the embodiments, a cavity structure is provided in the floating structure, and a ballast water system is installed in the floating structure. The ballast water system controls the diving and floating of the floating structure by controlling the amount of ballast water in the cavity structure.

[0030] In some of the embodiments, it further includes a cable system disposed on the deck structure, wherein the cable system is used to reinforce the connection between the immersed tube and the integrated ship.

[0031] Another aspect of the present invention discloses a construction process for transporting and installing an immersed tube, using the above-mentioned semi-submersible immersed tube transporting and installing integrated vessel, the construction process comprising the following steps:

[0032] S1: After the prefabrication of the immersed tube is completed, the immersed tube is put in place and winched to the position of the submerged pit;

[0033] S2: After the immersed tube is in place, the integrated ship is moved to a designated position so as to straddle the immersed tube;

[0034] S3: injecting ballast water into the floating structure of the integrated ship, so that the two floating structures dive synchronously to ensure that the integrated ship structure dives smoothly, and the support assembly is in a state of being close to the floating structure during the diving process; until the top surface of the support assembly is lower than the bottom surface of the immersed tube, the diving is stopped;

[0035] S4: the driving assembly drives the supporting assembly to extend out of the floating structure so that the supporting assembly is below the bottom surface of the submerged tube;

[0036] S5: The two floating structures simultaneously drain water and float upward, so that the integrated ship floats smoothly, and the top surface of the support assembly gradually contacts and bears force with the bottom surface of the immersed tube to support the immersed tube. The integrated ship continues to float upward until the integrated ship and the immersed tube structure as a whole meet the waterway draft requirements, and the floating structure stops draining water;

[0037] S6: towing the integrated vessel by a tugboat, wherein the integrated vessel drives the immersed tube to move synchronously through the friction between the support assembly and the immersed tube, so as to transport the immersed tube to a sinking installation position;

[0038] S7: After the integrated ship carrying the submerged tube is anchored in place, ballast water is injected into the floating structure of the integrated ship, so that the integrated ship and the submerged tube can dive synchronously and smoothly. When the force between the support assembly and the submerged tube is zero, the integrated ship continues to dive for a short distance to ensure that the support assembly is completely separated from the bottom surface of the submerged tube, and then stops injecting water to dive, releases the connection between the integrated ship and the submerged tube, and the driving assembly drives the support assembly to retract back to a position close to the floating structure;

[0039] S8: The two floating structures are simultaneously drained and floated, so that the integrated ship floats smoothly to the normal position, the anchor cable is adjusted, the integrated ship is twisted and moved, the submerged tube is driven to the installation position through the cable system, the ballast water volume of the submerged tube and the cable system are adjusted, the submerged tube is lowered smoothly, and the installation construction of the submerged tube is completed.

[0040] Compared with the prior art, the advantages and positive effects of the present invention are: providing a semi-submersible immersed tube transport and installation integrated vessel and construction process. The integrated vessel can reduce the draft of the hull after carrying the immersed tube, can realize the transportation of immersed tubes in shallow waterways, reduce the amount of dredging in the waterway, can effectively reduce construction costs, and improve construction efficiency and economic benefits. Specifically:

[0041] 1. The integrated ship has a semi-submersible function. During the transportation of the immersed tube, the integrated ship can provide greater buoyancy, and the supporting structure can lift the immersed tube, which can reduce the draft of the integrated ship and the immersed tube as a whole during transportation, meet the transportation requirements of shallow water channels, greatly reduce the dredging amount of the channel, and save construction costs.

[0042] 2. The supporting legs of the supporting mechanism are provided with a jack structure to support the immersed tube. Leveling can be achieved by adjusting the piston rod extension and retraction of the jacks of multiple supporting legs to ensure that the bottom surface of the immersed tube and all the legs are evenly stressed, avoiding damage to the immersed tube or equipment caused by local uneven stress.

[0043] 3. The truss connection structure is used to connect the floating structure and the deck structure, which makes it easy to disassemble and assemble the two floating structures and the deck structure, facilitates hull modification, changes in hull width, adapts to the transportation and installation of immersed tubes of different sizes, and improves the application value of the integrated ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the structure of the integrated boat of the present invention when viewed from above;

[0045] Figure 2 It is a structural schematic diagram of the integrated ship transporting the immersed tube of the present invention;

[0046] Figure 3 This is a schematic diagram of a single-side structure of an integrated ship of the present invention;

[0047] Figure 4 for Figure 3A magnified view of part A;

[0048] Figure 5 It is a schematic cross-sectional structural diagram of the integrated boat of the present invention;

[0049] Figure 6 for Figure 5 Enlarged view of part B. DETAILED DESCRIPTION

[0050] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that elements, structures, and features in one embodiment may also be beneficially combined in other embodiments without further description.

[0051] It should be noted that, in the description of the present invention, the directions or positional relationships indicated by terms such as “inside”, “outside”, “up”, “down”, “left”, “right”, “front” and “back” are based on the positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0052] Example:

[0053] like Figures 1 to 6 As shown, a semi-submersible immersed tube transport and installation integrated ship comprises a deck structure 2, a ship-tube connection structure for connecting the integrated ship and the immersed tube 10, two parallel floating structures 1, and two supporting mechanisms; the two supporting mechanisms are arranged on opposite sides of the floating structure 1; the floating structure 1 can be pressurized with water to control its diving and floating, and the vertical plane where the center line of the length direction of the integrated ship is located is used as a reference plane. The two floating structures 1 are symmetrically arranged relative to the reference plane, and the top surfaces (or upper parts) of the two floating structures 1 are connected by the deck structure 2. The immersed tube installation equipment can be installed on the deck structure 2, such as Figure 1 As shown, the two supporting mechanisms are symmetrically arranged relative to the reference plane, and the supporting mechanisms are arranged at the lower part (or bottom) of the floating structure 1; the structure of each supporting mechanism includes: at least two supporting components, and a driving mechanism for driving the supporting components to abut (such as Figure 1 left) or extended (i.e. away from, as Figure 1 (as shown on the right) is a driving assembly of the floating structure 1 on which it is located. When the supporting assembly is attached to the floating structure 1, the spacing between the supporting assemblies on the two floating structures 1 is greater than the width of the submerged tube 10, and does not affect the diving of the integrated ship above the submerged tube 10. When the supporting assembly extends out of the floating structure 1, the supporting assemblies of the two floating structures 1 can support the bottom surface of the submerged tube 10 at the same time. At this time, the space above the supporting assembly, below the deck structure 2 and between the two floating structures constitutes a carrying space for accommodating the submerged tube.

[0054] The construction process of transporting and installing the immersed tube using the above-mentioned integrated ship includes the following steps:

[0055] S1: After the immersed tube 10 is prefabricated, it is put in place and winched to the position of the submerged pit;

[0056] S2: After the immersed tube 10 is in place, the integrated ship is moved to a designated position so that it straddles the immersed tube 10;

[0057] S3: inject ballast water into the floating structure 1 of the integrated ship, so that the two floating structures 1 dive synchronously to ensure that the integrated ship structure dives smoothly. During the diving process, the support assembly is in a state of being close to the floating structure 1; when the top surface of the support assembly is lower than the bottom surface of the immersed tube 10, the diving is stopped;

[0058] S4: the driving assembly drives the supporting assembly to extend out of the floating structure 1, so that the supporting assembly is below the bottom surface of the immersed tube 10;

[0059] S5: The two floating structures 1 are simultaneously drained and floated, so that the integrated ship floats smoothly, and the top surface of the support assembly gradually contacts and bears force with the bottom surface of the immersed tube 10 to support the immersed tube 10. The integrated ship continues to float until the structure of the integrated ship and the immersed tube 10 as a whole meets the draft requirement of the channel, and the floating structure 1 stops draining water;

[0060] S6: The integrated vessel is towed by a tugboat, and the integrated vessel drives the immersed tube 10 to move synchronously through the friction between the support assembly and the immersed tube, so as to transport the immersed tube 10 to a sinking installation position;

[0061] S7: After the integrated ship carrying the submerged tube 10 is anchored in place, ballast water is injected into the floating structure 10 of the integrated ship, so that the integrated ship and the submerged tube 10 can dive synchronously and smoothly. When the force between the support assembly and the submerged tube 10 is zero (that is, when the buoyancy of the submerged tube 10 is equal to the gravity), the integrated ship continues to dive for a short distance to ensure that the support assembly is completely separated from the bottom surface of the submerged tube 10, and then stops injecting water to dive, releases the connection between the integrated ship and the submerged tube 10, and drives the support assembly to retract back to the position close to the floating structure 1;

[0062] S8: The two floating structures 2 are simultaneously drained and floated, so that the integrated ship floats smoothly to the normal position, the anchor cable is adjusted, the integrated ship is twisted and moved, and the immersed tube 10 is driven to the installation position through the cable system (the cable system can be a device pre-installed on the deck structure 2, or it can be an external device that is assembled after reaching the installation position), the ballast water volume of the immersed tube 10 and the cable system are adjusted, the immersed tube 10 is lowered smoothly, and the installation construction of the immersed tube 10 is completed.

[0063] The above-mentioned integrated ship has two larger floating structures 1. The pressurized water carrying structure 1 can make the integrated ship have a semi-submersible function. During the transportation of immersed tubes, the integrated ship can provide greater buoyancy. The supporting mechanism of the integrated ship can lift the immersed tube 10, which can reduce the overall draft of the integrated ship and the immersed tube 10 during transportation, meet the transportation requirements of shallow water channels, greatly reduce the dredging amount of the waterway, and save construction costs; at the same time, the equipment required for the installation of immersed tubes can be installed on its deck structure 2, that is, the integrated ship can have the function of a immersed tube installation ship, which can replace the use of installation ships, reduce installation investment, improve work efficiency, and have higher economic benefits.

[0064] The drive assembly and the support assembly are arranged one by one, and the structure of the support assembly can be as follows: Figure 4 and Figure 6 As shown, it includes: a support leg with a top surface for supporting the submerged tube 10, and a vertically arranged rotating shaft 4; the rotating shaft 4 is used to rotate and connect the support leg and the floating structure 1, and the driving assembly is arranged one by one with the support leg to drive the support leg to rotate around the central axis of the rotating shaft 4. The specific structure of the support leg includes: a mounting seat 5 fixedly mounted on the side wall of the rotating shaft 4, and a jack 3 with a cylinder bottom fixedly mounted on the top surface of the mounting seat 5, the piston rod of the jack 3 is arranged vertically upward, and the piston rod head is used to support the submerged tube. With the above structure, in step S5, leveling can be achieved by adjusting the piston rod extension of the jacks 3 of multiple support legs to ensure that the bottom surface of the submerged tube and all the legs are evenly stressed, so as to avoid damage to the submerged tube or equipment caused by uneven local stress.

[0065] Specifically, a pad 31 is fixedly mounted on the top surface of the piston rod of the jack 3, and the pad 31 is a rubber plate. The pad 31 contacts the submerged tube 10 to be transported, which can increase the friction required for floating transportation and improve the stability of the transportation process.

[0066] Specifically, the end of the rotating shaft 4 is connected to the floating structure 1 through a bearing, and the driving component structure can be as follows: Figure 4 and Figure 6 As shown, it includes: a hydraulic motor 7 with a vertically arranged driving shaft, a first gear 8 fixed on the driving shaft of the hydraulic motor 7, and a second gear 9 meshing with the first gear 8. The hydraulic motor 7 body is fixedly installed on the floating structure 1. The first gear 8 is coaxially arranged with the driving shaft of the hydraulic motor 7, and the second gear 9 is coaxially arranged with the rotating shaft 4 and sleeved and fixed on the rotating shaft 4 to realize the transmission between the hydraulic motor 7 and the supporting leg. With the above structure, the hydraulic motor 7 drives the supporting leg to rotate as shown in the figure. Figure 1 In the state shown on the left (i.e., the support legs are against the floating structure 1), the distance between the support legs on the two floating structures 1 is greater than the width of the submerged tube 10, and the support legs will not affect the diving of the integrated ship above the submerged tube 10. The hydraulic motor 7 drives the support legs to rotate as shown in FIG. Figure 1In the state shown on the right side (i.e. when the support legs extend out of the floating structure 1 and are perpendicular to its side wall), the support assemblies of the two floating structures 1 can simultaneously support the bottom surface of the submerged tube 10 to stably lift the submerged tube 10 and reduce the buoyancy required for its floating transportation.

[0067] Specifically, Figure 4 As shown, the side wall of the floating structure 1 is provided with a storage groove 11, and the storage groove 11 is arranged one by one with the support leg, the rotating shaft 4 is located in the storage groove 11, and the support leg can be rotated into the storage groove 11 with the rotating shaft 4 (that is, the support leg is located in the storage groove 11 when it is close to the floating structure 1). In order to facilitate the installation and protection of the drive assembly, as shown in FIG. Figure 6 As shown, a sealed electronic compartment 12 for installing a driving component is provided in the floating structure 1, and the sealed electronic compartment 12 is arranged in a one-to-one correspondence with the driving component.

[0068] Specifically, a cavity structure 13 is provided in the floating structure 1 , and a ballast water system is installed in the floating structure 1 . The ballast water system controls the diving and floating of the floating structure 1 by controlling the amount of ballast water in the cavity structure 13 .

[0069] Specifically, the pipe-ship connection structure may adopt any existing structure that can realize the connection between the reinforced immersed tube and the integrated ship, such as a cable system.

[0070] Specifically, the rotating shaft 4 and the mounting seat 5 are configured as steel structures.

[0071] Specifically, the deck structure 2 is fixedly connected to the floating structure 1 through a detachable truss connection structure 6. The use of the truss connection structure 6 makes it easy to disassemble and assemble the two floating structures 1 and the deck structure 2, facilitates hull modification, changes in hull width, adapts to the transportation and installation of immersed tubes 10 of different sizes, and improves the application value of the integrated ship.

[0072] Specifically, Figure 3 As shown, the truss connection structure 6 includes an upper connection plate structure 61 , a truss structure 62 and a lower connection plate structure 63 . The upper connection plate structure 61 is connected to the deck structure 2 , and the lower connection plate structure 63 is connected to the floating structure 1 .

[0073] Specifically, the integrated ship also includes a cable system arranged on the deck structure 2. The cable system can be used to reinforce the connection between the immersed tube and the integrated ship in step S5, and can be used for the immersed tube installation construction in step S8.

[0074] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A semi-submersible immersed tube transport and installation integrated vessel, characterized in that: include: A deck structure, two floating structures capable of pressurizing and carrying water, with a vertical plane on which the centerline of the length direction of the integrated ship is located as a reference plane, the two floating structures being symmetrically arranged relative to the reference plane, and the two floating structures being arranged in parallel, and the upper parts or top surfaces of the two floating structures being connected via the deck structure; and Two supporting mechanisms are respectively arranged on opposite sides of the two floating structures, and the two supporting mechanisms are symmetrically arranged relative to the reference plane, and the supporting mechanisms are arranged at the lower part or bottom of the floating structure; each of the supporting mechanisms further comprises: at least two support components; and The driving assembly is used to drive the supporting assembly to be close to or extend out of the floating structure where it is located. When the supporting assembly extends out of the floating structure, the supporting assembly can be supported on the bottom surface of the submerged tube, and the space above the supporting assembly, below the deck structure and between the two floating structures constitutes a carrying space for accommodating the submerged tube.

2. The semi-submersible immersed tube transport and installation integrated vessel according to claim 1, characterized in that: The support assembly further comprises: a supporting leg, the top surface of which is used to support the immersed tube; and A rotating shaft, vertically arranged, for rotatingly connecting the supporting legs and the floating structure; The driving components are arranged in one-to-one correspondence with the supporting legs to drive the supporting legs to rotate around the central axis of the rotating shaft.

3. The semi-submersible immersed tube transport and installation integrated vessel according to claim 2 is characterized in that: The end of the rotating shaft is connected to the floating structure through a bearing, and the driving assembly further includes: a hydraulic motor, the main body of which is fixedly mounted on the floating structure and the driving shaft of which is vertically arranged; a first gear, coaxially arranged with the driving shaft and sleeved and fixed on the driving shaft; and A second gear is coaxially arranged with the rotating shaft and sleeved and fixed on the rotating shaft, and the second gear is meshed with the first gear.

4. The semi-submersible immersed tube transport and installation integrated vessel according to claim 3 is characterized in that: The side wall of the floating structure is provided with a storage groove, and the storage groove is arranged in a one-to-one correspondence with the supporting leg. The rotating shaft is located in the storage groove, and the supporting leg can be rotated into the storage groove along with the rotating shaft; a sealed electronic compartment for installing the driving assembly is provided in the floating structure, and the sealed electronic compartment is arranged in a one-to-one correspondence with the driving assembly.

5. The semi-submersible immersed tube transport and installation integrated vessel according to claim 4 is characterized in that: It also includes a cable system arranged on the deck structure, and the cable system is used to reinforce the connection between the immersed tube and the integrated ship.

6. The semi-submersible immersed tube transport and installation integrated vessel according to claim 2, characterized in that: The support leg further comprises: A mounting seat, fixedly mounted on the side wall of the rotating shaft; and A jack, the cylinder bottom is fixedly mounted on the top surface of the mounting seat, and the piston rod is arranged vertically upward.

7. The semi-submersible immersed tube transport and installation integrated vessel according to claim 6, characterized in that: A pad is fixedly mounted on the top surface of the piston rod, and the pad is a rubber plate.

8. The semi-submersible immersed tube transport and installation integrated vessel according to claim 1, characterized in that: The deck structure is fixedly connected to the floating structure via a detachable truss connection structure, wherein the truss connection structure comprises an upper connecting plate structure, a truss structure and a lower connecting plate structure, wherein the upper connecting plate structure is connected to the deck structure, and the lower connecting plate structure is connected to the floating structure.

9. The semi-submersible immersed tube transport and installation integrated vessel according to claim 1, characterized in that: A cavity structure is provided in the floating structure, and a ballast water system is installed in the floating structure. The ballast water system controls the diving and floating of the floating structure by controlling the amount of ballast water in the cavity structure.

10. A construction process for transporting and installing an immersed tube, characterized in that: Using the semi-submersible immersed tube transport and installation integrated vessel according to any one of claims 1 to 9, the construction process comprises the following steps: S1: After the prefabrication of the immersed tube is completed, the immersed tube is put in place and winched to the position of the submerged pit; S2: After the immersed tube is in place, the integrated ship is moved to a designated position so as to straddle the immersed tube; S3: injecting ballast water into the floating structure of the integrated ship, so that the two floating structures dive synchronously to ensure that the integrated ship structure dives smoothly, and the support assembly is in a state of being close to the floating structure during the diving process; until the top surface of the support assembly is lower than the bottom surface of the immersed tube, the diving is stopped; S4: the driving assembly drives the supporting assembly to extend out of the floating structure so that the supporting assembly is below the bottom surface of the submerged tube; S5: The two floating structures simultaneously drain water and float upward, so that the integrated ship floats smoothly, and the top surface of the support assembly gradually contacts and bears force with the bottom surface of the immersed tube to support the immersed tube. The integrated ship continues to float upward until the integrated ship and the immersed tube structure as a whole meet the waterway draft requirements, and the floating structure stops draining water; S6: towing the integrated vessel by a tugboat, wherein the integrated vessel drives the immersed tube to move synchronously through the friction between the support assembly and the immersed tube, so as to transport the immersed tube to a sinking installation position; S7: After the integrated ship carrying the submerged tube is anchored in place, ballast water is injected into the floating structure of the integrated ship, so that the integrated ship and the submerged tube can dive synchronously and smoothly. When the force between the support assembly and the submerged tube is zero, the integrated ship continues to dive for a short distance to ensure that the support assembly is completely separated from the bottom surface of the submerged tube, and then stops injecting water to dive, releases the connection between the integrated ship and the submerged tube, and the driving assembly drives the support assembly to retract back to a position close to the floating structure; S8: The two floating structures are simultaneously drained and floated, so that the integrated ship floats smoothly to the normal position, the anchor cable is adjusted, the integrated ship is twisted and moved, the submerged tube is driven to the installation position through the cable system, the ballast water volume of the submerged tube and the cable system are adjusted, the submerged tube is lowered smoothly, and the installation construction of the submerged tube is completed.

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