An assembly method for a combined immersed tube and caisson barge

Abstract

This invention relates to an assembly method for a modular immersed tunnel placement barge, belonging to the field of immersed tunnel construction technology. The assembly method includes the following steps: connecting two installation crossbeams to form a composite structure; transporting two floats and the composite structure to above the construction area; controlling the sinking of the two floats, moving them to below both ends of the composite structure and making them parallel; controlling the upward movement of the two floats to support the composite structure, with the composite structure positioned between the same longitudinal end of the two floats; in the composite structure, the crossbeam closest to the longitudinal end of the float is the first crossbeam, and the other crossbeam is the second crossbeam; disconnecting the connection between the first and second crossbeams, moving the second crossbeam along the float to the longitudinal end of the float away from the first crossbeam; connecting the first and second crossbeams to the two floats respectively, completing the assembly. This assembly method can quickly complete the assembly of the modular immersed tunnel placement barge, with high assembly efficiency and a short cycle time.

Description

Technical Field

[0001] This invention belongs to the field of immersed tunnel construction technology, and in particular relates to an assembly method for a combined immersed tunnel placement barge. Background Technology

[0002] Immersed tunnels, as a type of large-scale underwater tunnel engineering, have the advantages of a wide range of tunnel cross-sectional shape selection, low requirements for foundation, shallow burial depth which can effectively shorten the route length, and parallel operation of pipe section construction procedures. They are particularly suitable for engineering sites such as soft foundations, riverbeds, or seabeds where it is easy to excavate the foundation trench using water dredging facilities, and are widely used in cross-sea, cross-river, and cross-river projects.

[0003] Immersion tunnel installation is a crucial step in the construction of immersed tunnels. Currently, immersion barges or self-propelled floating installation vessels (see patent CN106516021A) are commonly used for this operation. However, existing immersion barges or self-propelled floating installation vessels typically have large drafts, limiting their operation to the open sea or navigable Class I and II waterways. In limited construction areas, such as Class IV waterways (navigable to 500-ton vessels, with a depth of 2.5–3.2m and a bottom width of 40–45m), the dimensions of existing immersion barges or self-propelled floating installation vessels are insufficient to meet navigation requirements, making it impossible to tow them into the site. To reduce the requirements for channel depth and width, a modular immersed tunnel transport and installation barge (see patent CN110053720A) has been developed for immersed tunnel installation. However, this existing modular immersed tunnel transport and installation barge usually requires the separate transport of two crossbeams during assembly, and the two crossbeams need to be positioned and moved separately. The assembly process is cumbersome and the construction efficiency is low.

[0004] Therefore, how to improve the assembly efficiency of the modular immersed tube placement barge is a technical problem that urgently needs to be solved. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides an assembly method for a modular immersed tube placement barge, which can quickly complete the assembly of the modular immersed tube placement barge with high assembly efficiency and short cycle.

[0006] This invention provides a method for assembling a combined immersed tube placement barge, comprising the following steps:

[0007] Transportation: Connect the two crossbeams equipped with immersed tube lifting devices used for assembling the hull to form a combined structure, and transport the two floats used for assembling the hull and the combined structure to the area above the construction site;

[0008] Combined body support: Control the two floats to sink, move the two floats to the bottom of the two ends of the combined body respectively, and make the two floats parallel; control the two floats to float up, so as to support the combined body through the two floats. When supporting, the combined body is located between the same longitudinal end of the two floats.

[0009] Assemble the hull by deforming the combined body: In the combined body, the crossbeam near the longitudinal end of the float is the first crossbeam, and the other crossbeam is the second crossbeam; disconnect the connection between the first crossbeam and the second crossbeam, and move the second crossbeam along the float to the longitudinal end of the float away from the first crossbeam; connect the first crossbeam and the second crossbeam to the two floats respectively to complete the assembly.

[0010] In some embodiments, the float includes crossbeam connecting portions located at both longitudinal ends, and a support portion connecting the two crossbeam connecting portions; the support portion is provided with a track extending longitudinally, and a crossbeam movable support member is slidably connected on the track; the two ends of the crossbeam are provided with overlapping portions; in the assembly support step, when the float supports the assembly, the overlapping portions at both ends of the first crossbeam overlap with the crossbeam connecting portions at one longitudinal end of the two floats respectively, and the overlapping portions at both ends of the second crossbeam are respectively supported on the crossbeam movable support members of the two floats; in the assembly deformation and hull assembly step, the second crossbeam is moved to the longitudinal end close to the float by the movement of the crossbeam movable support member along the track, and the second crossbeam is dragged in the direction away from the longitudinal end of the first crossbeam of the float, so that the overlapping portions at both ends of the second crossbeam overlap with the crossbeam connecting portions of the two floats respectively.

[0011] In some embodiments, the assembly support step includes, before controlling the two floats to float, a step of adjusting the position of the crossbeam moving support so that the crossbeam moving support is located directly below the overlap of the second crossbeam.

[0012] In some embodiments, during the assembly support step, when controlling the two floats to rise, the floats are first raised until the top of the crossbeam connection at one longitudinal end of the float contacts the bottom of the overlapping part of the first crossbeam in the assembly, and the top of the crossbeam moving support of the float contacts the bottom of the overlapping part of the second crossbeam. The overlapping part of the first crossbeam is initially connected to the crossbeam connection of the two floats, and then the two floats are controlled to continue to rise so that the assembly is supported on the two floats.

[0013] In some embodiments, the two ends of the crossbeam are also provided with limiting members for abutting against the sides of the float to limit the relative position of the crossbeam and the float. A cavity for accommodating the crossbeam connecting part of the float is formed below the overlapping part, and the limiting members are disposed on the side cavity wall of the cavity. In the assembly support step, when the two floats are controlled to float, the crossbeam connecting part of the float enters the cavity of the first crossbeam, and the position of the crossbeam connecting part in the cavity is limited by the limiting members.

[0014] In some embodiments, during the hull assembly step of the combined body deformation, before moving the second crossbeam, an adjusting cable is connected between the adjusting winches at corresponding ends of the two crossbeams to assemble two adjusting devices between the two ends of the crossbeam; when moving the second crossbeam, the adjusting winch located on the first crossbeam in the adjusting device releases the adjusting cable, and the adjusting winch located on the second crossbeam winds up the adjusting cable, and the direction of movement of the second crossbeam is controlled by adjusting the speed at which the adjusting winches in the two adjusting devices release or wind up the adjusting cable.

[0015] In some embodiments, during the hull assembly step of the combined body deformation, the first crossbeam and the second crossbeam are connected to the two floats respectively by the first connector.

[0016] In some embodiments, a second connector is provided on one side of the first crossbeam, and a third connector corresponding to the second connector is provided on one side of the second crossbeam; in the floating step, the second connector is connected to the third connector to connect the first crossbeam and the second crossbeam to form a composite; in the hull deformation assembly step, the connection between the first crossbeam and the second crossbeam is broken by disassembling the second connector from the third connector.

[0017] In some embodiments, during the floating step, the float and the assembly are floated to the area to be constructed by tugboat.

[0018] In some embodiments, during the floating step, the float and the assembly are transported by a transport vessel to the area to be constructed.

[0019] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0020] 1. The assembly method of the combined immersed tube launching barge provided by the present invention connects two crossbeams to form a combined body, and transports the floating body and the combined body to the construction site for assembly. During assembly, the combined body is supported between the same longitudinal end of the two floating bodies, and then one crossbeam in the combined body is moved along the floating body to the other longitudinal end of the floating body to complete the assembly. The assembly process is simple, efficient and has a short cycle.

[0021] 2. The assembly method of the combined immersed tube launching barge provided by the present invention uses the crossbeam connecting part and the crossbeam moving support on the float to cooperate with the overlapping part on the crossbeam, so that the assembly is supported between the same longitudinal end of the two floats. Then, by moving the crossbeam moving support along the track, one of the crossbeams moves to the other longitudinal end of the float. The assembly process is simple, the assembly efficiency is high and the cycle is short. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1 This is a perspective view of a combined immersed tube placement barge in one embodiment of the present invention;

[0024] Figure 2 This is a top view of a combined immersed tube placement barge in one embodiment of the present invention;

[0025] Figure 3 This is a side view of a combined immersed tube placement barge in one embodiment of the present invention;

[0026] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0027] Figure 5 This is a top view of the assembly in one embodiment of the present invention;

[0028] Figure 6 This is a front view of the assembly in one embodiment of the present invention;

[0029] Figure 7 This is a top view of the assembly supported at one longitudinal end of the float in one embodiment of the present invention;

[0030] Figure 8 This is a front view of the assembly supported at one longitudinal end of the float in one embodiment of the present invention;

[0031] Figure 9 This is a top view of the second crossbeam moving longitudinally to the other end of the float in one embodiment of the present invention;

[0032] Figure 10 This is a front view of the second crossbeam moving longitudinally to the other end of the float in one embodiment of the present invention;

[0033] Figure 11 This is a top view of the assembled combined immersed tube launching barge in one embodiment of the present invention;

[0034] Figure 12 This is a front view of the assembled combined immersed tube launching barge in one embodiment of the present invention.

[0035] In the picture:

[0036] 1. Hull; 2. Immersed tube lifting device; 3. Mooring device; 4. Adjustment device;

[0037] 11. Float; 111. Crossbeam connecting part; 112. Support part; 113. Track; 114. Crossbeam moving support; 12. Crossbeam; 12a. First crossbeam; 12b. Second crossbeam; 121. Overlapping part; 122. Limiting part; 13. Second connecting part; 14. Third connecting part;

[0038] 21. Lowering the winch; 22. Installing the winch;

[0039] 31. Mooring winch; 32. Mooring cable;

[0040] 41. Adjusting winch; 42. Adjusting cable. Detailed Implementation

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0042] In the description of this invention, it should be understood that the terms "lateral", "longitudinal", "up", "down", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0043] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] As attached Figures 1-12 As shown, in an illustrative embodiment of the assembly method of the combined immersed tube launching barge of the present invention, the assembly method includes the following steps:

[0046] S1 Transportation: Connect the two crossbeams 12, which are equipped with the immersed tube lifting device 2, to form a combined body, and transport the two floats 11 and the combined body to the area above the construction site.

[0047] S2 Assembly Support: Control the two floats 11 to sink, move the two floats 11 to the bottom of both ends of the assembly, and make the two floats 11 parallel (with the length direction of the floats 11 as the longitudinal direction, the two floats 11 are arranged side by side in the transverse direction); Control the two floats 11 to float up, so as to support the assembly through the two floats 11. When supporting, the assembly is located between the same longitudinal end of the two floats 11.

[0048] S3 Assembly Deformation Assembly Hull 1: In the assembly, the crossbeam 12 near the longitudinal end of the float 11 is the first crossbeam 12a, and the other crossbeam 12 is the second crossbeam 12b; disconnect the connection between the first crossbeam 12a and the second crossbeam 12b, and move the second crossbeam 12b along the float 11 to the longitudinal end of the float 11 away from the first crossbeam 12a; connect the first crossbeam 12a and the second crossbeam 12b to the two floats 11 respectively to complete the assembly.

[0049] The above-mentioned assembly method for the combined immersed tube barge involves connecting two crossbeams 12 to form a combined body, and transporting the floats 11 and the combined body to the construction site for assembly. During assembly, the combined body is supported between the same longitudinal end of the two floats 11, and then one of the crossbeams 12 in the combined body is moved along the floats 11 to the other longitudinal end of the floats 11 to complete the assembly. The assembly process is simple, efficient, and has a short cycle.

[0050] In some embodiments, such as Figures 1-3 , Figure 9 and Figure 10As shown, the float 11 includes crossbeam connecting portions 111 located at both longitudinal ends, and a support portion 112 connecting the two crossbeam connecting portions 111. The support portion 112 is provided with a longitudinally extending track 113, on which a crossbeam moving support member 114 is slidably connected. The two ends of the crossbeam 12 are provided with overlapping portions 121. In the assembly support step, when the float 11 supports the assembly, the overlapping portions 121 at both ends of the first crossbeam 12a overlap with the crossbeam connecting portions 111 at one longitudinal end of the two floats 11. In this embodiment, the overlapping portions 121 at both ends of the second crossbeam 12b are respectively supported on the crossbeam moving support members 114 of the two floats 11. In the step of assembling the hull by deforming the combined body, the second crossbeam 12b is moved to the longitudinal end near the float 11 by the movement of the crossbeam moving support member 114 along the track 113. The second crossbeam 12b is then dragged towards the longitudinal end of the float 11 away from the first crossbeam 12a, so that the overlapping portions 121 at both ends of the second crossbeam 12b overlap the crossbeam connecting portions 111 of the two floats 11. In this embodiment, the crossbeam connecting portions 111 and the crossbeam moving support member 114 provided on the float 11 cooperate with the overlapping portions 121 provided on the crossbeam 12, so that the combined body is supported between the same longitudinal end of the two floats 11. Then, by the movement of the crossbeam moving support member 114 along the track 113, one of the crossbeams 12 is moved to the other longitudinal end of the float 11. The assembly process is simple, efficient, and has a short cycle.

[0051] It should be noted that, in the assembly support step, before controlling the two floats 11 to float, there is also a step of adjusting the position of the crossbeam moving support 114 so that the crossbeam moving support 114 is located directly below the overlap 121 of the second crossbeam 12b.

[0052] It should also be noted that, in the assembly support step, when controlling the two floats 11 to float, the floats 11 are first made to float until the top of the crossbeam connection 111 at one longitudinal end of the float 11 contacts the bottom of the overlapping part 121 of the first crossbeam 12a in the assembly, and the top of the crossbeam moving support 114 of the float 11 contacts the bottom of the overlapping part 121 of the second crossbeam 12b, so that the overlapping part 121 of the first crossbeam 12a is initially connected to the crossbeam connection 111 of the two floats 11, and then the two floats 11 are controlled to continue to float so that the assembly is supported on the two floats 11. After the float 11 floats up until the top of the crossbeam connection 111 at one of its longitudinal ends contacts the bottom of the overlap 121 of the first crossbeam 12a in the assembly and the top of the crossbeam moving support 114 of the float 11 contacts the bottom of the overlap 121 of the second crossbeam 12b, the float stops floating. Immediately, the overlap 121 of the first crossbeam 12a is initially connected to the crossbeam connection 111 of the two floats 11, and then the float 11 continues to float. This step-by-step floating method, compared with one-step floating, can avoid the assembly from slipping off the longitudinal end of the float 11 when the float 11 floats up and lifts the assembly, greatly reducing the construction risk.

[0053] It should also be noted that, in order to facilitate the movement of the second crossbeam 12b, such as Figure 7 and Figure 9 As shown, a mooring device 3 is installed on the crossbeam 12. The mooring device 3 includes multiple mooring winches 31 arranged on the two crossbeams 12. Each crossbeam 12 has a mooring winch 31 near both ends, and the mooring winches 31 are connected to mooring cables 32. Figure 7 and Figure 9 As shown, when the second crossbeam 12b is moved, the mooring cable 32 is moved by the mooring winch 31 installed on the second crossbeam 12b, thereby realizing the movement of the second crossbeam 12b.

[0054] In some embodiments, such as Figure 3 and Figure 4As shown, both ends of the crossbeam 12 are also provided with limiting members 122 for abutting against the sides of the float 11 to limit the relative position of the crossbeam 12 and the float 11. A cavity is formed below the overlapping part 121 for accommodating the crossbeam connecting part 111 of the float 11. The limiting member 122 is disposed on the side wall of the cavity. In the assembly support step, when the two floats 11 are controlled to float, the crossbeam connecting part 111 of the float 11 enters the cavity of the first crossbeam 12a, and the position of the crossbeam connecting part 111 in the cavity is limited by the limiting member 122. By providing a cavity below the overlapping part 121 of the crossbeam 12, which cooperates with the crossbeam connecting part 111 of the float 11, rapid positioning between the overlapping part 121 and the crossbeam connecting part 111 can be achieved. At the same time, by limiting the position of the crossbeam connecting part 111 in the cavity by the limiting member 122, collision between the crossbeam connecting part 111 of the float 11 and the side wall of the cavity can be avoided. It should be noted that, as Figure 4 As shown, the upper part of the cavity wall facing the crossbeam connection 111 is a vertical surface, and the lower part is an inclined surface that slopes away from the crossbeam connection 111. The limiting member 122 is provided on the inclined surface to facilitate the installation of the limiting member 122.

[0055] In some embodiments, in order to control the movement direction of the crossbeam 12 along with the crossbeam moving support 114, such as Figure 9 and Figure 10 As shown, in step 1 of the combined deformation assembly of the hull, before moving the second crossbeam 12b, an adjusting cable 42 is connected between the adjusting winches 41 at the corresponding ends of the two crossbeams 12 to assemble two adjusting devices 4 between the two ends of the crossbeams 12; when moving the second crossbeam 12b, the adjusting winch 41 located on the first crossbeam 12a in the adjusting device 4 releases the adjusting cable 42, and the adjusting winch 41 located on the second crossbeam 12b winds up the adjusting cable 42. The direction of movement of the second crossbeam 12b is controlled by adjusting the speed at which the adjusting winches 41 in the two adjusting devices 4 release or wind up the adjusting cable 42. It should be noted that, as Figure 9 As shown, there are two adjustment devices 4, which are located near the two ends of the crossbeam 12.

[0056] In some embodiments, it should be noted that in the step of assembling the hull by deforming the combined body, the first crossbeam 12a and the second crossbeam 12b are connected to the two floats 11 by the first connector (e.g., connecting bolt).

[0057] In some embodiments, to facilitate the assembly of the two crossbeams 12 into a combined assembly, such as... Figure 6As shown, a second connector 13 is provided on one side of the first crossbeam 12a, and a third connector 14 corresponding to the second connector 13 is provided on one side of the second crossbeam 12b. During the floating process, the second connector 13 is connected to the third connector 14, thus connecting the first crossbeam 12a and the second crossbeam 12b to form a combined assembly. During the hull deformation assembly step, the second connector 13 is detached from the third connector 14 to break the connection between the first crossbeam 12a and the second crossbeam 12b. The detachable connection of the second connector 13 and the third connector 14 allows for rapid assembly of the combined assembly. Specifically, in this embodiment, the second connector 13 is a connecting seat, and the third connector 14 is a connecting plate. The connecting plate is inserted into the connecting seat and hinged to it with bolts. This detachable connection structure, with the connecting seat, connecting plate, and bolts working together, is simple in structure and facilitates the assembly and disassembly of the combined assembly.

[0058] In some embodiments, during the floating step, the float 11 and the assembly are floated to the area to be constructed by a tugboat. It is understood that the float 11 and the assembly can also be transported to the area to be constructed by a transport vessel.

[0059] In addition, such as Figure 1 As shown, after the hull 1 is assembled, the space below the crossbeam 12 and located between the two floats 11 is used to accommodate the immersed tube. The immersed tube lifting device 2 is located on the two crossbeams 12 and is used to connect the immersed tube located in the space below the crossbeams 12 when the crossbeams 12 and the floats 11 are connected to form the hull 1, and to control the sinking of the immersed tube. The immersed tube lifting device 2 includes multiple sinking winches 21 and multiple installation winches 22 arranged on the two crossbeams 12. The sinking winches 21 are connected to sinking cables for sinking the immersed tube, and the installation winches 22 are connected to installation cables for adjusting the position and angle of the immersed tube.

[0060] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A method of assembling a combined tunnel sinking barge, characterized by, Includes the following steps: Transportation: Connect the two crossbeams equipped with immersed tube lifting devices used for assembling the hull to form a combined body, and transport the two floating bodies used for assembling the hull and the combined body to the area above the construction site; Combined body support: control the two floats to sink, move the two floats to the lower ends of the combined body respectively, and make the two floats parallel; control the two floats to float up, so as to support the combined body through the two floats. When supporting, the combined body is located between the same longitudinal end of the two floats. Assemble the hull by deforming the combined body: In the combined body, the crossbeam near the longitudinal end of the float is the first crossbeam, and the other crossbeam is the second crossbeam; disconnect the connection between the first crossbeam and the second crossbeam, and move the second crossbeam along the float to the longitudinal end of the float away from the first crossbeam; connect the first crossbeam and the second crossbeam to the two floats respectively to complete the assembly.

2. The assembly method of the combined immersed tube placement barge according to claim 1, characterized in that, The float includes crossbeam connecting portions located at both longitudinal ends, and a support portion connecting the two crossbeam connecting portions; the support portion is provided with a track extending longitudinally, and a crossbeam movable support member is slidably connected on the track; the two ends of the crossbeam are provided with overlapping portions; in the assembly support step, when the float supports the assembly, the overlapping portions at both ends of the first crossbeam overlap with the crossbeam connecting portions at one longitudinal end of the two floats respectively, and the overlapping portions at both ends of the second crossbeam are respectively supported on the crossbeam movable support members of the two floats; In the process of assembling the ship hull by deforming the combined body, the second crossbeam is moved to the longitudinal end of the float by the movement of the crossbeam moving support along the track, and the second crossbeam is dragged in the direction away from the longitudinal end of the float away from the first crossbeam so that the overlapping parts at both ends of the second crossbeam overlap the crossbeam connecting parts of the two floats respectively.

3. The assembly method of the combined immersed tube placement barge according to claim 2, characterized in that, In the combined support step, before controlling the two floats to float, the step of adjusting the position of the crossbeam moving support is included so that the crossbeam moving support is located directly below the overlapping part of the second crossbeam.

4. The assembly method of the combined immersed tube placement barge according to claim 2, characterized in that, In the assembly support step, when controlling the two floats to float, the floats are first made to float until the top of the crossbeam connection at one longitudinal end of the float contacts the bottom of the overlapping part of the first crossbeam in the assembly, and the top of the crossbeam moving support of the float contacts the bottom of the overlapping part of the second crossbeam. The overlapping part of the first crossbeam is initially connected to the crossbeam connection of the two floats. Then, the two floats are controlled to continue to float so that the assembly is supported on the two floats.

5. The assembly method of the combined immersed tube placement barge according to claim 2, characterized in that, Both ends of the crossbeam are provided with limiting members for abutting against the sides of the float to limit the relative position of the crossbeam and the float. A cavity is formed below the overlapping part for accommodating the crossbeam connecting part of the float. The limiting members are disposed on the side cavity wall of the cavity. In the assembly support step, when the two floats are controlled to float, the crossbeam connecting part of the float enters the cavity of the first crossbeam, and the position of the crossbeam connecting part in the cavity is limited by the limiting members.

6. The assembly method of the combined immersed tube placement barge according to claim 1, characterized in that, In the process of assembling the ship hull by deforming the assembly, before moving the second crossbeam, an adjusting cable is connected between the adjusting winches at the corresponding ends of the two crossbeams to assemble two adjusting devices between the two ends of the crossbeams; when moving the second crossbeam, the adjusting winch located on the first crossbeam in the adjusting device releases the adjusting cable, and the adjusting winch located on the second crossbeam winds up the adjusting cable. The direction of movement of the second crossbeam is controlled by adjusting the speed at which the adjusting winches in the two adjusting devices release or wind up the adjusting cable.

7. The assembly method of the combined immersed tube placement barge according to claim 1, characterized in that, In the process of assembling the ship hull by deforming the combined body, the first crossbeam and the second crossbeam are connected to the two floating bodies by the first connector.

8. The assembly method of the combined immersed tube placement barge according to claim 1, characterized in that, A second connector is provided on one side of the first crossbeam, and a third connector corresponding to the second connector is provided on one side of the second crossbeam; in the transportation step, the second connector is connected to the third connector so that the first crossbeam and the second crossbeam are connected to form the assembly; in the hull deformation assembly step, the connection between the first crossbeam and the second crossbeam is broken by disassembling the second connector from the third connector.

9. The assembly method of the combined immersed tube placement barge according to claim 1, characterized in that, In the transportation step, the float and the assembly are floated to the area to be constructed by a tugboat.

10. The assembly method of the combined immersed tube placement barge according to claim 1, characterized in that, In the transportation step, the floating body and the assembly are transported to the area above the construction site by a transport vessel.

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