Large module transfer method for large immersed tube prefabricated formwork in limited space

Abstract

A method for transferring large modules of large immersed tube prefabrication templates in a limited space, wherein the second prefabrication template is moved horizontally to one end of the third immersed tube prefabrication area close to the first immersed tube prefabrication area, the inner mold trolley module of the first prefabrication template is unloaded, the top plate steel bar binding frame module of the first prefabrication template is moved into the first immersed tube prefabrication area, the outer mold trolley module of the first prefabrication template is disassembled, the top truss module is unloaded and the top truss module is hoisted, and the top plate steel bar binding frame module is unloaded. In the embodiment of the present invention, the prefabricated mold is unloaded from the first immersed tube prefabrication area to the second immersed tube prefabrication area in a narrow space, so that the pipe segment prefabrication of the first immersed tube prefabrication area and the second immersed tube prefabrication area can be connected in the shortest time, and the impact on the pipe segment prefabrication of the third immersed tube prefabrication area can be minimized during the unloading process, the mold disassembly operation is small, the operation efficiency is high, and it will not be cut during disassembly, ensuring that it still has sufficient strength and stability after assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of immersed tube tunnel construction, and in particular relates to a large-module transfer method of a large immersed tube prefabricated template in a limited space. Background Art

[0002] During the construction of immersed tube tunnel, it is necessary to build a dry dock on the bank first so that immersed tubes can be prefabricated in the dry dock. Immersed tube tunnels are generally composed of multiple immersed tubes, all of which need to be prefabricated and displayed in the limited construction area of ​​the dry dock. However, the area occupied by the dry dock is limited due to the existing construction facilities on the bank. This limitation results in very narrow spacing between the immersed tube prefabrication area and the dock wall, as well as the spacing between adjacent immersed tube prefabrication areas.

[0003] As the immersed tube tunnel adopts a large-section structure, the width of the immersed tube increases, and the area required for prefabricating the immersed tube also increases, making the space in the dry dock even more compact. As a result, the distance between the immersed tube prefabrication area and the dock wall and between adjacent immersed tube prefabrication areas is further reduced, exacerbating the problem of insufficient space.

[0004] In the process of prefabricating immersed tubes, the mold trolley is an indispensable equipment. The immersed tube is generally divided into multiple tube sections and prefabricated separately. After all the tube sections are prefabricated, they are connected into one immersed tube. The mold trolley moves along the length direction of the immersed tube to prefabricate the tube sections one by one. In order to control the construction cost, immersed tubes of the same specifications usually use the same set of mold trolleys. In order to effectively utilize the construction space, immersed tubes of the same specifications are arranged side by side in the dry dock. After the mold trolley completes the prefabrication of all the tube sections of an immersed tube from one end to the other, it needs to be transferred to the prefabrication area of ​​another adjacent immersed tube. However, due to the small spacing between the prefabrication area of ​​the immersed tube and the dock wall and between adjacent prefabrication areas, the prefabricated immersed tubes will also cause obstacles, making it impossible to directly move the mold trolley to the next row.

[0005] To this end, a patent application with publication number CN119388560A and titled "Method for disassembling, assembling and transferring full-section prefabricated formwork for large immersed tubes in limited spaces" discloses a method for disassembling, assembling and transferring prefabricated formwork, which splits the mold trolley into multiple parts longitudinally and moves each part in turn. This method reduces the external dimensions of each part after the split, allowing it to move between the immersed tube prefabrication area and the dock wall and between adjacent prefabrication areas, thereby realizing the transfer of the mold trolley in a small space. However, this method of disassembling and assembling the mold trolley not only increases the construction workload and has low work efficiency, but also the disassembled parts need to be assembled in a new prefabrication area. The prefabrication of immersed tubes requires high precision for the mold trolley, and tedious adjustments are required after assembly to enable the mold trolley to meet the prefabrication precision requirements; secondly, some components will be cut during disassembly, which will reduce the strength of the mold trolley after assembly. Since the amount of concrete poured in the immersed tube with a large cross-section structure is large, the mold trolley is easily deformed under the pressure of a large amount of concrete, resulting in a decrease in prefabrication precision; in addition, the disassembled and transported parts also need to be repositioned in the new prefabrication area to ensure that the parts are assembled into the mold trolley in the original front-to-back order, further increasing the difficulty of the transport operation. Summary of the invention

[0006] In view of the shortcomings existing in the related art, the present invention provides a method for transferring large modules of large immersed tube prefabricated templates in a limited space, so as to solve the problems that the current immersed tube prefabrication mold trolley adopts the longitudinally split and reversed transportation method, which has the problems of cumbersome operation, low efficiency and easy reduction in strength.

[0007] The present invention provides a large-module transfer method of a large immersed tube prefabricated template in a limited space, wherein the dry dock has a dock wall, and the construction site surrounded by the dock wall has a first immersed tube prefabrication area, a second immersed tube prefabrication area and a third immersed tube prefabrication area, and the first immersed tube prefabrication area, the second immersed tube prefabrication area and the third immersed tube prefabrication area are arranged in a herringbone shape; the prefabricated template has two sets, namely, a first prefabricated template and a second prefabricated template;

[0008] The first immersed tube prefabrication area and the third immersed tube prefabrication area are prefabricated synchronously using the first prefabrication template and the second prefabrication template respectively; when the prefabrication of the pipe segments in the first immersed tube prefabrication area is completed and the distance between the pipe segments prefabricated in the third immersed tube prefabrication area and the first immersed tube prefabrication area meets the width of the inner mold trolley module of the prefabrication template and the top plate steel bar binding frame module, the space is reserved as a reverse transportation channel to transfer the prefabrication template. The specific transfer steps are as follows:

[0009] Free up the rear side reverse transportation space: move the second prefabricated template laterally to one end of the third immersed tube prefabrication area close to the first immersed tube prefabrication area;

[0010] Inner mold reverse transportation: Move the inner mold trolley module of the first prefabricated template backward to the third immersed tube prefabrication area, and further move it to the front end of the second immersed tube prefabrication area through the reverse transportation channel;

[0011] Free up the front side reverse transportation space: move the top plate reinforcement binding frame module of the first prefabricated template backward into the prefabricated pipe section at the front end of the first immersed tube prefabrication area;

[0012] External mold transport: split the external mold trolley module of the first prefabricated template into a top truss module and two side truss modules, move the two side truss modules to both sides of the second immersed tube prefabrication area, lift the top truss module to the second immersed tube prefabrication area, and assemble it with the two side truss modules into an external mold trolley module;

[0013] Reverse transportation of the binding cradle: Move the top plate reinforcement binding cradle module of the first prefabricated formwork backward to the third immersed tube prefabrication area, and further move it to the rear side of the inner mold trolley module in the second immersed tube prefabrication area through the reverse transportation channel formed between the rear end of the first immersed tube prefabrication area and the prefabricated pipe sections in the third immersed tube prefabrication area.

[0014] In some embodiments, the external mold transfer is further divided into:

[0015] Splitting the outer mold and its first step of reverse transportation: splitting the outer mold trolley module of the first prefabricated template into a top truss module and two side truss modules, placing the top truss module on the prefabricated pipe section in the first immersed tube prefabrication area, rotating the side truss module between the first immersed tube prefabrication area and the second immersed tube prefabrication area by 180 degrees, and moving the other side truss module from the front side of the first immersed tube prefabrication area to the side of the second immersed tube prefabrication area away from the first immersed tube prefabrication area;

[0016] The second step of transporting the outer mold is to lift the top truss module to the second immersed tube prefabrication area and assemble it with the two side truss modules into an outer mold trolley module.

[0017] In some of the embodiments, the prefabricated templates further include a middle corridor trolley. After the second prefabricated template is moved laterally, the middle corridor trolley of the first prefabricated template is moved backward to the third immersed tube prefabrication area, and further moved to the front end of the second immersed tube prefabrication area through the reverse transportation channel formed between the rear end of the first immersed tube prefabrication area and the prefabricated pipe sections in the third immersed tube prefabrication area, and then the inner mold trolley module of the first prefabricated template is moved backward.

[0018] In some embodiments, the inner mold trolley module and the top plate reinforcement binding frame module are moved out of the first immersed tube prefabrication area, first placed on the template transfer trolley parked on the third immersed tube prefabrication area, and then transported to the second immersed tube prefabrication area by the template transfer trolley;

[0019] After the outer mold trolley module is disassembled, the two side truss modules are hoisted onto the template transfer trolley, and are rotated and transported by the template transfer trolley.

[0020] In some embodiments, after the second prefabrication template is laterally moved to an end of the third immersed tube prefabrication area close to the first immersed tube prefabrication area, the pipe segment is prefabricated at the end of the third immersed tube prefabrication area;

[0021] After the first prefabricated template is transported from the first immersed tube prefabrication area to the second immersed tube prefabrication area, the second prefabricated template is moved laterally away from the first immersed tube prefabrication area to prefabricate the remaining tube sections of the third immersed tube one by one.

[0022] In some of the embodiments, a waterproof bottom steel plate corresponding to the pipe segment is laid at the front end of the second immersed tube prefabrication area, and bottom plate reinforcement is tied on the waterproof bottom steel plate;

[0023] The inner mold trolley module of the first prefabricated template is moved to the front end of the second immersed tube prefabrication area, and the outer mold trolley module of the first prefabricated template is disassembled, transported and assembled at the front end of the second immersed tube prefabrication area;

[0024] The outer mold trolley module and the inner mold trolley module of the first precast template are used to tie the side wall reinforcement and the top plate reinforcement in turn, and then concrete is poured to prefabricate the front end pipe section of the second immersed tube prefabrication area.

[0025] In some embodiments, after the bottom plate reinforcement is tied at the front end of the second immersed tube prefabrication area, a waterproof bottom steel plate of the next adjacent tube section is laid in the adjacent area at the rear side and the bottom plate reinforcement is tied on the waterproof bottom steel plate;

[0026] After the concrete of the front pipe segment of the second immersed tube prefabrication area solidifies to the set strength, the outer mold trolley module of the first prefabricated template is moved horizontally backward to the adjacent area at the rear side, and is used to tie the side wall reinforcement of the next adjacent pipe segment at the rear side;

[0027] Move the top plate reinforcement binding cradle module of the first prefabricated template to the second immersed tube prefabrication area, allow it to enter the interior of the outer mold trolley module, and use it to bind the top plate reinforcement of the next adjacent pipe section on the rear side.

[0028] In some of the embodiments, after the outer mold trolley module of the first precast template is laterally moved backward to the adjacent area at the rear side, concrete curing is performed on the front end pipe section of the second immersed tube precast area;

[0029] After the top plate reinforcement is tied in the adjacent area on the rear side, the support system is converted using the outer mold trolley module, and then the inner mold trolley module is moved horizontally backward and moved into the reinforcement cage of the adjacent area on the rear side to support the top plate reinforcement and pour concrete to prefabricate the next adjacent pipe section on the rear side.

[0030] In some of the embodiments, when the second prefabricated template is moved laterally to an end of the third immersed tube prefabrication area close to the first immersed tube prefabrication area, the second prefabricated template is located on the outside directly behind the first immersed tube prefabrication area.

[0031] In some of the embodiments, there are two first prefabricated formwork inner mold trolley modules and two top plate reinforcement binding frame modules, and both are transported one by one from the first immersed tube prefabrication area to the second immersed tube prefabrication area.

[0032] In some of the embodiments, the dock area of ​​the dry dock is located directly in front of the first immersed tube prefabrication area. When the prefabrication of the pipe segment at the front end of the first immersed tube prefabrication area is completed, the top plate steel bar binding cradle module of the first prefabricated template is located on the front side of the first immersed tube prefabrication area and extends into the dock area.

[0033] Compared with the prior art, the beneficial effect of the present application is that: in the embodiment of the present invention, the prefabrication of the pipe segments in the third immersed tube prefabrication area and the first immersed tube prefabrication area are started simultaneously, and when the distance between the pipe segments in the third immersed tube prefabrication area and the first immersed tube prefabrication area just meets the width for the inner mold trolley module and the top plate steel bar binding cradle module to pass through, the space is reserved as a transfer channel, and the second prefabricated template is moved horizontally to the other end of the third immersed tube prefabrication area for prefabrication, and the inner mold trolley module and the top plate steel bar binding cradle module that have been prefabricated pipe segments withdrawn backwards can be transferred to the second immersed tube prefabrication area through the transfer channel, and the outer mold trolley module is transferred by disassembly and reassembly, so that the prefabricated mold is transferred from the first immersed tube prefabrication area to the second immersed tube prefabrication area in a narrow space, so that the prefabrication of the pipe segments in the first immersed tube prefabrication area and the second immersed tube prefabrication area can be connected in the shortest time, and the maximum degree of transfer can be achieved during the transfer process. In order to reduce the impact on the prefabrication of the pipe segments in the third immersed tube prefabrication area, only the outer mold trolley module was disassembled during the transportation process, and the mold disassembly operation volume was small. The inner mold trolley module and the top plate steel bar binding frame module were transported as a whole. After arriving at the new prefabrication area, only simple adjustments were required to meet the prefabrication accuracy requirements, and the operation efficiency was high. In addition, the outer mold trolley module was disassembled according to the large module when it was assembled, and it would not be cut during the disassembly, ensuring that it still had sufficient strength and stability after assembly. Except for the top truss module, the remaining structures would not pass over the top of the prefabricated pipe segments that have been completed in the first immersed tube prefabrication area. The risk of the prefabricated template falling and breaking was low, and the balance requirement during the translation process was low, and it would not cause damage to the pipe segments, thereby avoiding the extension of the construction period. The problem of cumbersome operation, low efficiency and easy reduction in strength of the current immersed tube prefabrication mold trolley using the longitudinally split transportation method was solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0035] Figure 1 The construction diagram of the large module transfer method of the limited space large immersed tube prefabricated template of the present invention is shown in FIG. Figure 1 ;

[0036] Figure 2 The construction diagram of the large module transfer method of the limited space large immersed tube prefabricated template of the present invention is shown in FIG. Figure 2 ;

[0037] Figure 3 The construction diagram of the large module transfer method of the limited space large immersed tube prefabricated template of the present invention is shown in FIG. Figure 3 ;

[0038] Figure 4 The construction diagram of the large module transfer method of the limited space large immersed tube prefabricated template of the present invention is shown in FIG. Figure 4 ;

[0039] Figure 5 The construction diagram of the large module transfer method of the limited space large immersed tube prefabricated template of the present invention is shown in FIG. Figure 5 ;

[0040] Figure 6 The construction diagram of the large module transfer method of the limited space large immersed tube prefabricated template of the present invention is shown in FIG. Figure 6 ;

[0041] Figure 7 The construction diagram of the large module transfer method of the limited space large immersed tube prefabricated template of the present invention is shown in FIG. Figure 7 ;

[0042] Figure 8 The construction diagram of the large module transfer method of the limited space large immersed tube prefabricated template of the present invention is shown in FIG. Figure 8 ;

[0043] Fig. 9 The construction diagram of the large module transfer method of the limited space large immersed tube prefabricated template of the present invention is shown in FIG. Figure 9 ;

[0044] Fig.10 The construction diagram of the large module transfer method of the limited space large immersed tube prefabricated template of the present invention is shown in FIG. Figure 10 ;

[0045] Fig.11 Schematic diagram of the process of prefabrication of pipe segments in the large module transfer method of large immersed pipe prefabrication template in limited space of the present invention Figure 1 ;

[0046] Fig.12 Schematic diagram of the process of prefabrication of pipe segments in the large module transfer method of large immersed pipe prefabrication template in limited space of the present invention Figure 2 ;

[0047] Fig.13 Schematic diagram of the process of prefabrication of pipe segments in the large module transfer method of large immersed pipe prefabrication template in limited space of the present invention Figure 3 .

[0048] In the figure:

[0049] A, the first immersed tube; B, the second immersed tube; C, the third immersed tube; D, the fourth immersed tube; 10, tube section;

[0050] 1. Dry dock; 11. Dock wall; 12. Dock entrance area; 13. Horizontal construction channel; 14. Vertical construction channel;

[0051] 21. The first immersed tube prefabrication area; 22. The second immersed tube prefabrication area; 23. The third immersed tube prefabrication area;

[0052] 3. Prefabricated formwork; 3A. First prefabricated formwork; 3B. Second prefabricated formwork; 31. Inner formwork trolley module; 32. Outer formwork trolley module; 321. Top truss module; 322. Side truss module; 33. Top plate reinforcement tyre frame module; 34. Middle corridor trolley;

[0053] 41. Waterproof bottom steel plate; 42. Bottom plate steel bars; 43. Top plate steel bars;

[0054] 5. Reverse transport channel; 6. Template transfer trolley. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0056] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0057] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0058] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] like Figures 1 to 10 As shown, in an illustrative embodiment of the limited space large immersed tube prefabricated template large module transfer method of the present invention, the dry dock 1 has a dock wall 11, and the construction site enclosed by the dock wall 11 has a first immersed tube prefabrication area 21, a second immersed tube prefabrication area 22 and a third immersed tube prefabrication area 23. The first immersed tube prefabrication area 21 and the second immersed tube prefabrication area 22 are both arranged longitudinally and arranged side by side in the transverse direction. The third immersed tube prefabrication area 23 is arranged longitudinally and is located at the rear side of the first immersed tube prefabrication area 21 and the second immersed tube prefabrication area 22, so that it extends from one end from the rear side of the first immersed tube prefabrication area 21 to the other end of the second immersed tube prefabrication area 22. The first immersed tube prefabrication area 21, the second immersed tube prefabrication area 22 and the third immersed tube prefabrication area 23 are arranged in a herringbone shape.

[0060] The first immersed tube prefabrication area 21, the second immersed tube prefabrication area 22 and the third immersed tube prefabrication area 23 need to prefabricate the respective pipe sections 10 of the first immersed tube A, the second immersed tube B and the third immersed tube C. The prefabrication template includes an inner mold trolley module 31 and an outer mold trolley module 32, the inner mold trolley module 31 has an inner template, and the outer mold trolley module 32 has an outer template, so as to form a casting space between the inner template and the outer template. During prefabrication, a waterproof bottom steel plate 41 is laid on the ground in the construction area, bottom plate steel bars 42 are tied on the waterproof bottom steel plate 41, and an outer formwork trolley module 32 is arranged. The outer formwork on the outer formwork trolley module 32 is used to pour concrete on the bottom plate to form the bottom plate of the pipe segment. At the same time, the outer formwork trolley module 32 is used to tie the side wall steel bars. After the bottom plate is poured, the inner formwork trolley module 31 is put into the casting space to tie the top plate steel bars 43, and concrete is poured into the casting space to form the side walls and top plate of the pipe segment between the inner formwork and the outer formwork and above the inner formwork, thereby prefabricating the pipe segment of the immersed tube, and finally carrying out concrete curing.

[0061] There are two sets of prefabricated templates, namely a first prefabricated template 3A and a second prefabricated template 3B. The first prefabricated template 3A is used for prefabrication of the first immersed tube and the second immersed tube, and the second prefabricated template 3B is used for prefabrication of the third immersed tube.

[0062] The first prefabricated formwork 3A not only has an inner mold trolley module 31 and an outer mold trolley module 32, but also includes a top plate reinforcement binding frame module 33. Fig.11 As shown, after the bottom plate reinforcement is tied, the top plate reinforcement tyre frame module 33 is first placed in, so that the top plate reinforcement 43 is tied in the top plate reinforcement tyre frame module 33, as shown in FIG. Fig.12 As shown, after the top plate reinforcement 43 is tied, the outer mold trolley module 32 is moved in to tie the side wall reinforcement, and then the top plate reinforcement 43 is connected to the top truss module 321 of the outer mold trolley module 32 through a steel cable, so that the outer mold trolley module 32 vertically supports the top plate reinforcement 43, and the support system is converted. At this time, the top plate reinforcement tyre frame module 33 can be withdrawn, and the bottom plate concrete is poured, as shown in FIG. Fig.13 As shown, after the pouring is completed, the inner mold trolley module 31 is moved in to pour concrete for the side walls and top plate. Fig.11 As shown, when the bottom plate reinforcement is tied to the previous pipe section, the waterproof bottom steel plate 41 of the next adjacent pipe section is laid, and then the bottom plate reinforcement 42 is tied; Fig.12 As shown, when the next adjacent pipe section completes the binding of the bottom plate reinforcement 42, the previous pipe section uses the top plate reinforcement binding frame module 33 to bind the top plate reinforcement; Figure 11 to Figure 12 As shown, after the previous pipe segment is moved into the outer mold trolley module and the support system conversion is completed, the top plate reinforcement binding frame module 33 is moved into the next adjacent pipe segment to perform side wall reinforcement binding.

[0063] If there is no top plate steel bar binding frame module 33, when the concrete pouring of the previous pipe section is completed, the concrete only needs to solidify to the lower first set strength to withdraw the outer mold trolley module 32, and the concrete solidifies to the higher second set strength before the inner mold trolley module 31 can be withdrawn and moved to the next pipe section to use it to bind the top plate steel bars 43, which will extend the construction period of the immersed pipe prefabrication. Therefore, the top plate steel bar binding frame module 33 is set in the prefabrication mold, so that the top plate steel bars 43 can be bound as soon as possible in the next pipe section, shortening the construction period of the immersed pipe prefabrication.

[0064] The first prefabrication template 3A first prefabricates the first immersed tube segments from the back to the front, and then is transported to the front end of the second immersed tube prefabrication area 22, and prefabricates the second immersed tube segments from the front to the back. Figure 1As shown, the E4-1 pipe section, E4-2 pipe section, E4-3 pipe section, E4-4 pipe section and E4-5 pipe section of the first immersed tube are prefabricated in sequence from back to front, and then transported to the front end of the second immersed tube prefabrication area, and the E3-5 pipe section, E3-4 pipe section, E3-3 pipe section, E3-2 pipe section and E3-1 pipe section of the second immersed tube are prefabricated in sequence from front to back. Before prefabrication, it is necessary to assemble the prefabricated formwork first. Since the prefabrication of the pipe sections in the third immersed tube prefabrication area 23 starts from the end away from the first immersed tube prefabrication area 21, the third immersed tube prefabrication area 23 directly behind the first immersed tube prefabrication area 21 is idle at the beginning. More specifically, when the waterproof bottom steel plate 41 of the first pipe section of the first immersed tube is laid, the outer mold trolley module 32 is assembled and calibrated in the third immersed tube prefabrication area 23 directly behind; when the outer mold trolley module 32 is moved to the first pipe section for tying its side wall steel bars, the top plate steel bar tying cradle module 33 is assembled in the third immersed tube prefabrication area 23 directly behind; when the top plate steel bar tying cradle module 33 is moved to the first pipe section for tying its top plate steel bars 43, the inner mold trolley module 31 is assembled and calibrated in the third immersed tube prefabrication area 23 directly behind.

[0065] For the prefabrication of the third immersed tube, compared with the first prefabricated template 3A, the second prefabricated template 3B requires less prefabricated pipe segments, and does not use the top plate steel bar binding frame module 33, so that the time for completing the prefabrication of all the pipe segments of the third immersed tube is roughly the same as the time for completing the prefabrication of all the pipe segments of the first and second immersed tubes, which will not cause the extension of the overall construction period of the immersed tube prefabrication, and can also save the number of mold equipment required in the prefabricated template, thereby reducing construction costs.

[0066] The first immersed tube prefabrication area 21, the second immersed tube prefabrication area 22 and the third immersed tube prefabrication area 23 form three transverse construction channels 13 and three longitudinal construction channels 14 in the dry dock 1. More specifically, the three transverse construction channels 13 are respectively located between the first immersed tube prefabrication area 21 and the laterally adjacent dock wall 11, between the first immersed tube prefabrication area 21 and the second immersed tube prefabrication area 22, and between the second immersed tube prefabrication area 22 and the laterally adjacent dock wall 11. The three longitudinal construction channels 14 are respectively located between the first and second immersed tube prefabrication areas and the front dock wall 11, between the first and second immersed tube prefabrication areas and the third immersed tube prefabrication area 23, and between the third immersed tube prefabrication area 23 and the rear adjacent dock wall 11. The width of the transverse construction channel 13 and the longitudinal construction channel 14 is narrow, and the inner mold trolley module 31, the outer mold trolley module 32 and the top plate steel bar binding frame module 33 cannot enter. If the pipe sections are prefabricated one by one from the front end of the first immersed tube prefabrication area 21 to the back, when the first prefabricated template 3A reaches the rear end of the first immersed tube prefabrication area 21 and needs to be transported to the second immersed tube prefabrication area 22, the second prefabricated template 3B or the prefabricated pipe section in the third immersed tube prefabrication area 23 will block the transportation of the first prefabricated template 3A, making it impossible to transport it to the second immersed tube prefabrication area 22.

[0067] In order to avoid causing obstruction to reverse transportation, the first prefabricated template 3A prefabricates the various pipe sections of the first immersed tube in sequence from the rear end to the front end of the first immersed tube prefabrication area 21, and the two ends of the third immersed tube prefabrication area 23 are respectively set as the first end and the second end, the first end is close to the first immersed tube prefabrication area 21, and the second end is close to the second immersed tube prefabrication area 22. The second prefabricated template 3B prefabricates the pipe sections of the third immersed tube from the first end to the second end of the third immersed tube prefabrication area 23.

[0068] like Figure 1 As shown, when the prefabricated pipe segment in the first immersed tube prefabrication area 21 reaches its front end, and the distance between the prefabricated pipe segment in the third immersed tube prefabrication area 23 and the rear end of the first immersed tube prefabrication area 21 is 1 to 1.5 times the width of the inner mold trolley module 31, the prefabrication template is transferred. The specific transfer steps are as follows:

[0069] like Figure 2 As shown, the step of freeing up the rear side reverse transportation space is performed, the second precast template 3B is moved horizontally to the first end of the third immersed tube prefabrication area 23, the reverse transportation of the second precast template 3B is completed, thereby stopping the prefabrication of the third immersed tube to the first end, and the second precast template 3B is removed to free up the space on the rear side of the first immersed tube prefabrication area 21 and the middle of the third immersed tube prefabrication area 23.

[0070] like Figures 4 to 5 As shown, the inner mold reverse transportation step is performed, the inner mold trolley module 31 of the first prefabricated template 3A is moved backward, the prefabricated pipe section of the first immersed tube is removed, and moved to the third immersed tube prefabrication area 23, and further moved to the front end of the second immersed tube prefabrication area 22 through the reverse transportation channel 5 formed between the rear end of the first immersed tube prefabrication area 21 and the prefabricated pipe section of the third immersed tube prefabrication area 23.

[0071] like Figures 3 to 5 As shown, a step of freeing up the front side reverse transportation space is performed, whereby the top plate reinforcement binding cradle module 33 of the first precast template 3A is moved backward into the prefabricated pipe section at the front end of the first immersed tube prefabrication area 21, thereby freeing up the space between the front end of the first immersed tube prefabrication area 21 and the adjacent front dock wall 11.

[0072] like Figure 6As shown, the outer mold splitting and the first step of reverse transportation are to split the outer mold trolley module 32 of the first prefabricated template 3A into a top truss module 321 and two side truss modules 322, place the top truss module 321 on the prefabricated pipe section of the first immersed tube prefabrication area 21, rotate the side truss module 322 located between the first immersed tube prefabrication area 21 and the second immersed tube prefabrication area 22 by 180 degrees, and move the other side truss module 322 from the front side of the first immersed tube prefabrication area 21 to the side of the second immersed tube prefabrication area 22 away from the first immersed tube prefabrication area 21, thus completing the first step of reverse transportation of the outer mold trolley module 32. Since the outer mold is installed on the two side truss modules 322, the two side truss modules 322 carrying the outer mold are heavy, and the top truss module 321 is relatively light, and placing it on the prefabricated pipe section will not cause damage to the pipe section. In addition, since the second precast template 3B occupies the longitudinal construction channel 14 between the first and second immersed tube precast areas and the third immersed tube precast area 23, a side truss module 322 is transported to the second immersed tube precast area 22 through the longitudinal construction channel 14 on the front side of the first immersed tube precast area 21.

[0073] like Figures 7 and 8 As shown, the second step of transporting the outer mold is carried out, the top truss module 321 is hoisted to the second immersed tube prefabrication area 22, and assembled with the two side truss modules 322 into the outer mold trolley module 32, and the outer mold trolley module 32 is calibrated, thereby completing the second step of transporting the outer mold trolley module 32.

[0074] like Fig. 9 As shown, the binding frame reverse transportation step is performed, the top plate steel bar binding frame module 33 of the first prefabricated template 3A is moved backward, moved to the third immersed tube prefabrication area 23, and further moved to the rear side of the inner mold trolley module 31 in the second immersed tube prefabrication area 22 through the reverse transportation channel 5 formed between the rear end of the first immersed tube prefabrication area 21 and the prefabricated pipe section in the third immersed tube prefabrication area 23, and the first prefabricated template 3A is reversed from the first immersed tube prefabrication area 21 to the second immersed tube prefabrication area 22. During the prefabrication of the pipe section of the first immersed tube, the top plate steel bar binding frame module 33 is always located at the front side of the inner mold trolley module 31, so after the inner mold trolley module 31 is reversed to the second immersed tube prefabrication area 22, the top plate steel bar binding frame module 33 is removed from the obstacle of escaping backward and leaving the first immersed tube prefabrication area 21, so that it is reversed to the second immersed tube prefabrication area 22.

[0075] like Fig.10 As shown, after the reverse transportation is completed in the above manner, the top plate reinforcement binding frame module 33 of the first precast formwork 3A is located on the rear side of the inner mold trolley module 31, which meets the needs of prefabrication of the second immersed tube one by one from front to back, so that the binding of the top plate reinforcement 43 of the next tube section in the second immersed tube can be carried out simultaneously with the pouring of the top plate concrete of the previous tube section, thereby ensuring construction efficiency.

[0076] In the above-mentioned exemplary embodiment, in the limited space large-scale immersed tube prefabrication template large module transfer method, the pipe segment prefabrication of the third immersed tube prefabrication area 23 and the first immersed tube prefabrication area 21 is started synchronously. When the pipe segment of the third immersed tube prefabrication area 23 is prefabricated to the first immersed tube prefabrication area 21, the distance between the pipe segment is just enough to meet the width of the inner mold trolley module 31 and the top plate steel bar binding frame module 33, the space is reserved as the reverse transportation channel 5, and the second prefabricated template 3B is horizontally moved to the other end of the third immersed tube prefabrication area 23. The inner mold trolley module 31 and the top plate reinforcement binding frame module 33 that have been prefabricated pipe segments can be transported backwards to the second immersed tube prefabrication area 22 through the transport channel 5. The outer mold trolley module 32 is transported by disassembling and reassembling. In a narrow space, the prefabricated mold is transported from the first immersed tube prefabrication area 21 to the second immersed tube prefabrication area 22, so that the pipe segment prefabrication in the first immersed tube prefabrication area 21 and the second immersed tube prefabrication area 22 can be connected in the shortest time. The effect on the prefabrication of the 23 pipe sections in the third immersed tube prefabrication area can be minimized. During the transportation, only the outer mold trolley module is disassembled, and the mold disassembly operation volume is small. The inner mold trolley module and the top plate steel bar binding frame module are transported as a whole. After the two arrive at the new prefabrication area, only simple adjustments are required to meet the prefabrication accuracy requirements, and the operation efficiency is high. The outer mold trolley module itself is assembled from a top truss module and two side truss modules, and is disassembled according to the large modules when it is assembled. It will not be cut during the disassembly, ensuring that it still has sufficient strength and stability after assembly. Except for the top truss module, the remaining structures will not pass over the top of the prefabricated pipe sections in the first immersed tube prefabrication area. The risk of the prefabricated template falling and breaking is low, and the balance requirement during the translation process is low, and the pipe sections will not be damaged, thereby avoiding the extension of the construction period. The problem of cumbersome operation, low efficiency and easy reduction in strength of the current immersed tube prefabrication mold trolley using the longitudinally split transportation method is solved.

[0077] After the inner mold trolley module is transported to the front end of the second immersed tube prefabrication area, the truck crane enters the site to support the top truss module of the outer mold trolley module, thereby preventing the top truss module from falling and damaging the pipe section during the splitting of the outer mold trolley module. When splitting and transporting the side truss modules and the top truss modules of the outer mold trolley module, the top plate steel bar binding cradle module can be moved backward simultaneously and moved to the rear end of the first immersed tube prefabrication area, so that when the outer mold trolley module is assembled in the second immersed tube prefabrication area, the top plate steel bar binding cradle module can be moved out of the first immersed tube prefabrication area and further moved into the second immersed tube prefabrication area. After the two side truss modules of the outer mold trolley module are transported to the second immersed tube prefabrication area, they are first placed on the rear side of the inner mold trolley module that has been transported, waiting at this position for the top truss module to be assembled with it. After the assembly and calibration are completed, they are moved forward to the front end of the second immersed tube prefabrication area, and prefabricate the first tube section at the front end of the second immersed tube together with the inner mold trolley module. The reassembly and calibration of the outer mold trolley module are carried out in an open area, which is convenient for operation.

[0078] In some embodiments, the immersed tube has two driving lanes with a middle corridor between the driving lanes for laying pipelines. The prefabricated templates further include a middle corridor trolley 34, on which there is a middle corridor template, the length of which is greater than the length of the pipe section, so that when concrete is poured, the middle corridor trolley 34 extends out from one end.

[0079] When the second precast formwork 3B is transported to the first end of the third immersed tube precast area 23, the middle corridor trolley 34 extends out of a section of the outer mold trolley module 32 and is located directly behind the first immersed tube precast area 21. The distance between it and the first immersed tube precast area 21 is sufficient to accommodate the inner mold trolley module 31 and the top plate steel bar binding cradle module 33 of the first precast formwork 3A, and will not cause any obstruction to the transport of the first precast formwork 3A.

[0080] For the reverse transportation of the first prefabricated template 3A, the second prefabricated template 3B is moved horizontally. Figure 3As shown, the middle corridor trolley 34 of the first prefabricated template 3A is moved backwards to the third immersed tube prefabrication area 23, and further moved to the front end of the second immersed tube prefabrication area 22 through the reverse transportation channel 5 formed between the rear end of the first immersed tube prefabrication area 21 and the prefabricated pipe section of the third immersed tube prefabrication area 23, and then the inner mold trolley module 31 of the first prefabricated template 3A is moved backwards. When the second prefabricated template 3B is reversed to the first end of the third immersed tube prefabrication area 23, the corridor trolley 34 is located on the side directly behind the middle corridor trolley 34 of the first prefabricated template 3A, so as to avoid obstruction to the reverse transportation of the middle corridor trolley 34 of the first prefabricated template 3A. Since the middle corridor trolley 34 is relatively long, its posture needs to be adjusted to be horizontal after being transported. Before transporting the inner mold trolley module 31 and the top plate steel bar binding frame module 33, the longer middle corridor trolley 34 is transported reversely first so that its posture can be adjusted in an open space to avoid obstruction to its angle adjustment by the inner mold trolley module 31 and the top plate steel bar binding frame module 33.

[0081] In some embodiments, the inner mold trolley module 31 and the top plate reinforcement binding frame module 33 removed from the first immersed tube prefabrication area 21 are first placed on the template transfer trolley 6 parked on the third immersed tube prefabrication area 23, and then transported to the second immersed tube prefabrication area 22 by the template transfer trolley 6. After the outer mold trolley module 32 is disassembled, the two side truss modules 322 are hoisted onto the template transfer trolley 6, and are rotated and transported by the template transfer trolley 6.

[0082] The reverse transport channel 5 is inclined relative to the horizontal direction, and the template transfer trolley 6 with a wheeled structure carries and moves the inner mold trolley module 31, the top plate reinforcement binding frame module 33 and the side truss module 322, which is convenient for adjusting the angle, so as to smoothly pass through the inclined reverse transport channel 5 and avoid collision with the pipe sections of the first immersed tube and the third immersed tube during the reverse transport process.

[0083] In some embodiments, after the second prefabricated template 3B is moved laterally to the first end of the third immersed tube prefabrication area 23, the first prefabricated template 3A is transported backwards while the pipe segments are prefabricated at the first end of the third immersed tube prefabrication area 23, thereby improving the construction efficiency of immersed tube prefabrication and avoiding the extension of the construction period due to reverse transportation.

[0084] After the first prefabricated template 3A is transported from the first immersed tube prefabrication area 21 to the second immersed tube prefabrication area 22, the transport channel 5 is no longer needed to transport the first prefabricated template 3A. The second prefabricated template 3B is moved horizontally to the second end of the third immersed tube prefabrication area 23 to prefabricate the remaining tube sections of the third immersed tube one by one, thus completing the prefabrication of all the tube sections of the third immersed tube. For example, the third immersed tube has 5 tube sections. Figure 1As shown, the E2-5 pipe section and E2-4 pipe section of the third immersed tube are prefabricated in sequence first, and then the second prefabricated template 3B is transported back to the first end of the third immersed tube prefabrication area, and flows out of the transport channel. After the first prefabricated template 3A is transported back, the E2-1 pipe section, E2-2 pipe section and E2-3 pipe section of the third immersed tube are prefabricated in sequence in the reverse direction. In addition, when the immersed tube tunnel further needs a shorter fourth immersed tube D, the length of the fourth immersed tube is not greater than the length of one pipe section of the third immersed tube. The fourth immersed tube is prefabricated at the first end of the third immersed tube prefabrication area. After the prefabrication of the E2-5 pipe section and E2-4 pipe section of the third immersed tube is completed, it is transported back to the second prefabricated template 3B at the first end of the third immersed tube prefabrication area to prefabricate the fourth immersed tube, and then the E2-1 pipe section, E2-2 pipe section and E2-3 pipe section of the third immersed tube are prefabricated in sequence in the reverse direction.

[0085] In some embodiments, a waterproof bottom steel plate 41 corresponding to the pipe section is laid at the front end of the second immersed tube prefabrication area 22, and the bottom plate reinforcement 42 is tied on the waterproof bottom steel plate 41. The inner mold trolley module 31 of the first prefabricated template 3A is moved to the front end of the second immersed tube prefabrication area 22, and the outer mold trolley module 32 of the first prefabricated template 3A is disassembled, transported and assembled at the front end of the second immersed tube prefabrication area 22. The outer mold trolley module 32 and the inner mold trolley module 31 of the first prefabricated template 3A are used to tie the side wall reinforcement and the top plate reinforcement 43 in turn, and then concrete is poured to prefabricate the pipe section at the front end of the second immersed tube prefabrication area 22.

[0086] More specifically, before the inner mold trolley module 31 and the outer mold trolley module 32 of the first prefabricated formwork 3A are transported, the waterproof bottom steel plate 41 of the first pipe section of the second immersed tube and the binding of the bottom plate steel bars 42 are started. After the inner mold trolley module 31 and the outer mold trolley module 32 are transported in place, they can be used immediately to bind the side wall steel bars and the top plate steel bars 43, thereby improving the compactness of the connection of each step of the prefabrication construction, shortening the construction period, and improving the construction efficiency.

[0087] In some embodiments, after the bottom plate steel bars 42 of the first section of the second immersed tube are tied at the front end of the second immersed tube prefabrication area 22, the waterproof bottom steel plate 41 of the second section of the second immersed tube is laid in the adjacent area at the rear side and the bottom plate steel bars 42 are tied on the waterproof bottom steel plate 41.

[0088] After the first pipe section at the front end of the second immersed tube prefabrication area 22 completes the concrete pouring of the side walls and the top plate, and after the concrete solidifies to the set strength (i.e., the first set strength), the outer mold trolley module 32 of the first prefabricated formwork 3A is moved backwards to the adjacent area at the rear side, and is used to tie the side wall reinforcement of the second pipe section adjacent to the rear side.

[0089] When the second pipe section is undergoing side wall reinforcement tying, if the first precast formwork 3A has been transported backwards, it will be directly sent into the outer formwork trolley module 32 and used to tie the top plate reinforcement 43 of the second pipe section; if the second precast formwork 3B has not been transported backwards, the top plate reinforcement tying frame module 33 of the first precast formwork 3A will be moved to the second immersed tube prefabrication area 22, and then sent into the outer formwork trolley module 32 and used to tie the top plate reinforcement 43 of the second pipe section.

[0090] During the reverse transportation of the first prefabricated template 3A, the first pipe section at the front end of the second immersed tube does not need to be prefabricated using the top plate steel bar binding frame module 33, so that construction can start earlier and improve construction efficiency. The top plate steel bar binding frame module 33 moved in later is always located in the first position in the prefabrication direction, so that the subsequent pipe sections of the second immersed tube can be prefabricated efficiently, without the need to replace the top plate steel bar binding frame module 33 and the inner mold trolley module 31. Although the prefabrication of the first pipe section of the second immersed tube takes a long time, it can still ensure that the overall time for completing the prefabrication of each pipe section of the second immersed tube is short.

[0091] In some embodiments, after the outer mold trolley module 32 of the first precast template 3A moves horizontally backward to the adjacent area on the rear side, concrete curing of the first pipe section at the front end of the second immersed tube precast area 22 begins.

[0092] After the top plate reinforcement 43 of the second pipe segment is tied, the support system is converted using the outer mold trolley module 32. At this time, the concrete of the first pipe segment is solidified to the second set strength. The inner mold trolley module 31 is moved horizontally backward to move it out of the first pipe segment and further moved into the reinforcement cage of the second pipe segment adjacent to the rear side to support the top plate reinforcement 43 and pour concrete to prefabricate the second pipe segment.

[0093] The concrete curing of the first pipe section and the binding of the top plate steel bars 43 of the second pipe section are carried out simultaneously. When the concrete of the first pipe section reaches the set strength, the steel cage of the second pipe section is moved in to ensure that the prefabrication of the first pipe section and the second pipe section is closely connected, thereby improving construction efficiency and shortening the construction period.

[0094] In some embodiments, when the second prefabricated template 3B is moved laterally to one end of the third immersed tube prefabrication area 23 close to the first immersed tube prefabrication area 21, the second prefabricated template 3B is located on the outside directly behind the first immersed tube prefabrication area 21, that is, the inner mold trolley module 31 and the outer mold trolley module 32 of the second prefabricated template 3B are both located on the outside directly behind the first immersed tube prefabrication area 21, and the space directly behind the first immersed tube prefabrication area 21 is not occupied by any structure, which facilitates the removal and unloading of the first prefabricated template 3A.

[0095] In some embodiments, when the immersed tube has two driving lanes, the first precast formwork 3A has two inner mold trolley modules 31 and two top plate steel bar binding frame modules 33, and both are transported one by one from the first immersed tube prefabrication area 21 to the second immersed tube prefabrication area 22, that is, the two inner mold trolley modules 31 are transported to the front end of the second immersed tube prefabrication area 22 in turn, and after the outer mold trolley module 32 is transported, the two top plate steel bar binding frame modules 33 are transported to the second immersed tube prefabrication area 22 in turn, and are placed on the adjacent rear side of the corresponding inner mold trolley module 31, so that the inner mold trolley module 31 and the two top plate steel bar binding frame modules 33 can be smoothly transported to avoid conflicts during the transportation process.

[0096] In some embodiments, the dock area 12 of the dry dock 1 is located directly in front of the first immersed tube prefabrication area 21. When the prefabrication of the pipe segment at the front end of the first immersed tube prefabrication area 21 is completed, the top plate steel bar binding cradle module 33 of the first prefabricated formwork 3A is located on the front side of the first immersed tube prefabrication area 21 and extends into the dock area 12.

[0097] Since the transverse construction channel 13 on the front side of the first immersed tube prefabrication area 21 is narrow and cannot accommodate the top plate steel bar binding frame module 33, the first immersed tube prefabrication area 21 is aligned with the dock area 12, so that after the top plate steel bars 43 are bound at the last pipe section at the front end of the first immersed tube, the front area of ​​the first immersed tube prefabrication area 21 can accommodate the top plate steel bar binding frame module 33 that has been removed from the steel cage, ensuring that the inner mold trolley module 31 can enter the steel cage of the last pipe section, so that all pipe sections of the first immersed tube can be efficiently prefabricated by means of support system conversion, thereby improving prefabrication efficiency. In addition, the first prefabricated immersed tube is aligned with the dock area 12, which is also convenient for it to leave the dry dock 1 when it is sunk and installed, making subsequent operations more convenient.

[0098] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0099] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A method for transferring large modules of large immersed tube prefabricated templates in a limited space, characterized in that: The dry dock has a dock wall, and the construction site enclosed by the dock wall has a first immersed tube prefabrication area, a second immersed tube prefabrication area and a third immersed tube prefabrication area, which are arranged in a herringbone shape; there are two sets of prefabricated templates, namely, a first prefabricated template and a second prefabricated template; The first immersed tube prefabrication area and the third immersed tube prefabrication area respectively start prefabrication synchronously using the first prefabrication template and the second prefabrication template; When the prefabrication of the pipe segments in the first immersed tube prefabrication area is completed and the distance between the pipe segments prefabricated in the third immersed tube prefabrication area and the first immersed tube prefabrication area meets the width for the inner mold trolley module of the prefabricated template and the top plate steel bar binding frame module to pass through, the space is reserved as a reverse transportation channel for the transfer of the prefabricated template. The specific transfer steps are as follows: Free up the rear side reverse transportation space: move the second prefabricated template laterally to one end of the third immersed tube prefabrication area close to the first immersed tube prefabrication area; Inner mold reverse transportation: Move the inner mold trolley module of the first prefabricated template backward to the third immersed tube prefabrication area, and further move it to the front end of the second immersed tube prefabrication area through the reverse transportation channel; Free up the front side reverse transportation space: move the top plate reinforcement binding frame module of the first prefabricated template backward into the prefabricated pipe section at the front end of the first immersed tube prefabrication area; External mold transport: split the external mold trolley module of the first prefabricated template into a top truss module and two side truss modules, move the two side truss modules to both sides of the second immersed tube prefabrication area, lift the top truss module to the second immersed tube prefabrication area, and assemble it with the two side truss modules into an external mold trolley module; Reverse transportation of the binding cradle: Move the top plate reinforcement binding cradle module of the first prefabricated formwork backward to the third immersed tube prefabrication area, and further move it to the rear side of the inner mold trolley module in the second immersed tube prefabrication area through the reverse transportation channel formed between the rear end of the first immersed tube prefabrication area and the prefabricated pipe sections in the third immersed tube prefabrication area.

2. According to the limited space large immersed tube prefabricated template large module transfer method of claim 1, it is characterized by: External mold transportation is further divided into: Splitting the outer mold and its first step of reverse transportation: splitting the outer mold trolley module of the first prefabricated template into a top truss module and two side truss modules, placing the top truss module on the prefabricated pipe section in the first immersed tube prefabrication area, rotating the side truss module between the first immersed tube prefabrication area and the second immersed tube prefabrication area by 180 degrees, and moving the other side truss module from the front side of the first immersed tube prefabrication area to the side of the second immersed tube prefabrication area away from the first immersed tube prefabrication area; The second step of transporting the outer mold is to lift the top truss module to the second immersed tube prefabrication area and assemble it with the two side truss modules into an outer mold trolley module.

3. According to claim 1, the method for transferring large modules of large immersed tube prefabricated templates in limited space is characterized in that: The prefabricated templates further include a middle corridor trolley. After the second prefabricated template is moved horizontally, the middle corridor trolley of the first prefabricated template is moved backward to the third immersed tube prefabrication area, and further moved to the front end of the second immersed tube prefabrication area through the reverse transportation channel formed between the rear end of the first immersed tube prefabrication area and the prefabricated pipe sections in the third immersed tube prefabrication area, and then the inner mold trolley module of the first prefabricated template is moved backward.

4. According to claim 1, the limited space large immersed tube prefabricated template large module transfer method is characterized in that: The inner mold trolley module and the top plate reinforcement binding frame module are moved out of the first immersed tube prefabrication area, first placed on the template transfer trolley parked on the third immersed tube prefabrication area, and then transported to the second immersed tube prefabrication area by the template transfer trolley; After the outer mold trolley module is disassembled, the two side truss modules are hoisted onto the template transfer trolley, and are rotated and transported by the template transfer trolley.

5. According to claim 1, the limited space large immersed tube prefabricated template large module transfer method is characterized in that: After the second prefabrication template is laterally moved to one end of the third immersed tube prefabrication area close to the first immersed tube prefabrication area, the pipe segment is prefabricated at the end of the third immersed tube prefabrication area; After the first prefabricated template is transported from the first immersed tube prefabrication area to the second immersed tube prefabrication area, the second prefabricated template is moved laterally away from the first immersed tube prefabrication area to prefabricate the remaining tube sections of the third immersed tube one by one.

6. According to claim 1, the limited space large immersed tube prefabricated template large module transfer method is characterized in that: Lay the waterproof bottom steel plate corresponding to the pipe section at the front end of the second immersed tube prefabrication area, and tie the bottom plate reinforcement on the waterproof bottom steel plate; The inner mold trolley module of the first prefabricated template is moved to the front end of the second immersed tube prefabrication area, and the outer mold trolley module of the first prefabricated template is disassembled, transported and assembled at the front end of the second immersed tube prefabrication area; The outer mold trolley module and the inner mold trolley module of the first precast template are used to tie the side wall reinforcement and the top plate reinforcement in turn, and then concrete is poured to prefabricate the front end pipe section of the second immersed tube prefabrication area.

7. The method for transferring large modules of large immersed tube prefabricated templates in limited space according to claim 6 is characterized in that: After the bottom plate reinforcement is tied at the front end of the second immersed tube prefabrication area, a waterproof bottom steel plate of the next adjacent pipe section is laid in the adjacent area at the rear side and the bottom plate reinforcement is tied on the waterproof bottom steel plate; After the concrete of the front pipe segment of the second immersed tube prefabrication area solidifies to the set strength, the outer mold trolley module of the first prefabricated template is moved backwards to the adjacent area at the rear side, and the outer mold trolley module is used to tie the side wall reinforcement of the next adjacent pipe segment at the rear side; Move the top plate reinforcement binding cradle module of the first prefabricated template to the second immersed tube prefabrication area, allow it to enter the interior of the outer mold trolley module, and use it to bind the top plate reinforcement of the next adjacent pipe section at the rear side.

8. The method for transferring large modules of large immersed tube prefabricated templates in limited space according to claim 7 is characterized in that: After the outer mold trolley module of the first precast template is moved horizontally backward to the adjacent area at the rear side, concrete curing is performed on the front pipe section of the second immersed tube precast area; After the top plate reinforcement is tied in the adjacent area on the rear side, the support system is converted using the outer mold trolley module, and then the inner mold trolley module is moved horizontally backward and moved into the reinforcement cage of the adjacent area on the rear side to support the top plate reinforcement and pour concrete to prefabricate the next adjacent pipe section on the rear side.

9. The method for transferring large modules of large immersed tube prefabricated templates in limited space according to claim 1 is characterized in that: When the second prefabricated template is moved laterally to one end of the third immersed tube prefabrication area close to the first immersed tube prefabrication area, the second prefabricated template is located on the outside right behind the first immersed tube prefabrication area.

10. The method for transferring large modules of large immersed tube prefabricated templates in limited space according to claim 1 is characterized in that: The dock area of ​​the dry dock is located directly in front of the first immersed tube prefabrication area. When the prefabrication of the pipe section at the front end of the first immersed tube prefabrication area is completed, the top plate steel bar binding cradle module of the first prefabricated template is located on the front side of the first immersed tube prefabrication area and extends into the dock area.

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