A construction method for integral lifting of the crossbeam skeleton of a bridge tower

Abstract

This application relates to the technical field of crossbeam construction, and proposes a construction method for integral lifting of the crossbeam skeleton of a bridge tower, including the following steps: S1: Support the bottom formwork of the crossbeam and the cross-brace skeleton at the bottom of the two tower columns, and connect the bottom formwork of the crossbeam and the cross-brace skeleton through suspension rods; S2: During the construction process of the tower columns, embed a number of connecting rods and a number of connecting plates at the construction station of the crossbeam; S3: Install a hoisting system above the number of connecting rods; S4: Connect the hoisting systems on the two tower columns to the cross-brace skeleton; S5: Hoist the cross-brace skeleton and the bottom formwork of the crossbeam in place through the hoisting system; S6: Weld and fix the upper chord of the cross-brace skeleton to the corresponding connecting rod; weld and fix the lower chord of the cross-brace skeleton to the corresponding connecting plate. This application has the effect of facilitating the construction of the bottom formwork of the crossbeam.

Description

Technical Field

[0001] The present application relates to the field of bridge tower crossbeam construction, and in particular to a construction method for integrally lifting the framework of a bridge tower crossbeam. Background Art

[0002] During the construction of a bridge tower, the two tower columns of the bridge tower are usually constructed prior to the crossbeam. Due to design requirements, the two tower columns of the bridge tower are inclined at a certain angle towards a similar direction.

[0003] Affected by wind load and construction load, the two tower columns of the bridge tower are prone to slight sway. To reduce the influence of the sway of the tower columns on the subsequent crossbeam construction, several cross braces are erected between the two tower columns before the crossbeam construction to limit the sway of the two tower columns by using the cross braces, and finally the crossbeam construction is carried out.

[0004] At present, during the construction of the bottom formwork of the crossbeam of the bridge tower, multiple hoisting operations are required to complete the erection construction of the bottom formwork. The overall construction is relatively cumbersome. Moreover, due to the existence of the cross braces between the two tower columns, the bottom formwork of the crossbeam cannot be directly hoisted vertically during the hoisting construction, further increasing the operation difficulty, and the construction of the bottom formwork of the crossbeam is relatively difficult. Therefore, there is room for improvement. Summary of the Invention

[0005] In order to reduce the construction difficulty of the bottom formwork of the crossbeam of the bridge tower, the present application provides a construction method for integrally lifting the framework of a bridge tower crossbeam.

[0006] A construction method for integrally lifting the framework of a bridge tower crossbeam provided by the present application adopts the following technical solutions:

[0007] A construction method for integrally lifting the framework of a bridge tower crossbeam includes the following steps:

[0008] S1: Erection of the cross brace framework and the bottom formwork of the crossbeam: Erection of the bottom formwork of the crossbeam and the cross brace framework at the bottom of the two tower columns, and connecting the bottom formwork of the crossbeam and the cross brace framework through suspension rods;

[0009] S2: Installation of embedded parts: During the construction of the tower columns, a number of connecting rods and a number of connecting plates are embedded at the construction station of the crossbeam; the connecting rods are used to connect the upper chord of the cross brace framework, and the connecting plates are used to connect the lower chord of the cross brace framework;

[0010] S3: Installation of the hoisting system: Installation of the hoisting system above a number of connecting rods;

[0011] S4: Connection of the hoisting system: Connecting the hoisting systems on the two tower columns with the cross brace framework;

[0012] S5: Hoisting of the cross brace framework and the bottom formwork of the crossbeam: Hoisting the cross brace framework and the bottom formwork of the crossbeam in place through the hoisting system;

[0013] S6: Welding and fixing the cross brace frame: weld and fix the upper chord of the cross brace frame to the corresponding connecting rod; weld and fix the lower chord of the cross brace frame to the corresponding connecting plate.

[0014] By adopting the above technical scheme, after the cross brace frame and the cross beam bottom formwork are hoisted to the construction position of the cross beam through the hoisting system, the upper chord and the lower chord at the end of the cross brace frame are respectively welded and fixed to the corresponding connecting rods and connecting plates; on the one hand, the tower columns of the bridge tower can be limited and fixed by the cross brace frame, so that the two tower columns can remain relatively stable during the subsequent cross beam construction; at the same time, the cross brace frame can be cast inside the cross beam together with the cross beam steel cage, which is conducive to further improving the overall strength of the cross beam; on the other hand, the integrated hoisting of the cross brace frame and the cross beam bottom formwork is realized, and the cross brace frame is hoisted into place and welded and fixed, and the support of the cross beam bottom formwork can be completed; compared with the traditional method of constructing the cross beam bottom formwork, there is no need to construct the cross brace between the two tower columns first, and then hoist the cross beam bottom formwork, which reduces the frequency and number of high-altitude hoisting operations and reduces the construction difficulty of the cross beam bottom formwork. By pre-embedding connecting rods on the tower columns, on the one hand, the connecting rods serve as connecting nodes for the upper chords of the subsequent cross-bracing skeleton, and on the other hand, the connecting rods also serve as lifting fulcrums for the lifting system of the present application. Compared with the existing method of lifting large components between two tower columns, which requires additional corbel supports to be installed on the top of the tower columns as lifting fulcrums for the lifting system, the construction steps are further simplified and the overall construction difficulty is reduced.

[0015] Preferably, the hoisting system comprises two hoisting supports, which are respectively welded and fixed to the connecting rods on both sides of the tower column, and the hoisting supports are both equipped with through-hole jacks;

[0016] In step S4, the through-hole jack is connected to the cross bracing frame via a sling;

[0017] In step S5, the cross bracing frame and the cross beam bottom formwork are hoisted by tensioning the slings through the through-hole jacks.

[0018] By adopting the above technical solution, after the through-hole jack is connected to the cross bracing frame through the sling, the cross bracing frame and the bottom formwork of the beam can be lifted upward by tensioning the sling through the through-hole jack, making the lifting of the cross bracing frame and the bottom formwork of the beam simpler and more convenient.

[0019] Preferably, a sliding seat is provided on the lifting support, the through-hole jack is vertically installed on the sliding seat, and the sliding seat and the lifting support are both provided with through holes for the lifting rope to be passed through; support rods are connected to each other on two sides of the sliding seats; the lifting support is also provided with a vertical adjustment jack and two lateral adjustment jacks, the vertical adjustment jack is located on the side of the sliding seat away from the support rod and the piston rod of the vertical adjustment jack abuts against the sliding seat, the two lateral adjustment jacks are respectively located on the side of the sliding seat facing the tower column and the side away from the tower column, and the piston rods of the lateral adjustment jacks both abut against the sliding seat.

[0020] By adopting the above technical solution, in the subsequent process of hoisting the cross brace frame, the position of the slide seat can be adjusted by the vertical adjustment jack and the horizontal adjustment jack, thereby driving the through-hole jack to adjust the position of the cross brace frame through the sling, which is conducive to the hoisting system to more easily hoist the cross brace frame into the installation gap between the relative connecting rods of the two tower columns.

[0021] Preferably, in step S1, a plurality of limit jacks are installed at the ends of the cross bracing frame and the piston rods of the limit jacks are directed toward the tower column;

[0022] In step S6, before welding and fixing the cross brace frame, the limit jacks at both ends of the cross brace frame drive the corresponding piston rods to extend and press against the tower column.

[0023] By adopting the above technical solution, due to reasons related to welding precision, the installation gap reserved between the connecting rods of the two tower columns of the cross bracing skeleton is relatively small, resulting in certain difficulties in the final positioning of the cross bracing skeleton during hoisting. Through the setting of the limit jacks at both ends of the cross bracing skeleton, before the subsequent hoisting system hoists the cross bracing skeleton into the installation gap between the connecting rods of the two tower columns, after the piston rods of the limit jacks at both ends of the cross bracing skeleton are driven to abut against the tower column, the piston rods of the limit jacks at both ends of the cross bracing skeleton are driven to extend and retract to adjust the lateral position of the cross bracing skeleton until the installation gap between the cross bracing skeleton and the corresponding connecting rods of the two tower columns is approximately opposite, achieving the rough positioning of the cross bracing skeleton. Then, in cooperation with the lateral adjustment jack of the hoisting support, the lateral position of the cross bracing skeleton is further adjusted to achieve the fine positioning of the cross bracing skeleton, facilitating the hoisting system to more easily hoist the cross bracing skeleton into place, which is beneficial to further reducing the hoisting difficulty of the cross bracing skeleton. At the same time, after the hoisting system hoists the cross bracing skeleton into place, the piston rods of several limit jacks at both ends of the cross bracing skeleton are driven to extend and tightly abut against the tower column, which can achieve the temporary limit fixation of the cross bracing skeleton, facilitating the restriction of the sway of the hoisted cross bracing skeleton during the subsequent welding and installation of the cross bracing skeleton, and is beneficial to reducing the difficulty of the welding operation of the cross bracing skeleton. On the other hand, when strong winds suddenly occur during the hoisting of the cross bracing skeleton, the piston rods of the limit jacks at the ends of the cross bracing skeleton can be driven to extend and abut against the tower column to limit the cross bracing skeleton during hoisting and reduce the situation of the cross bracing skeleton swaying affected by strong winds.

[0024] Preferably, in step S2, when constructing the tower column, a number of limit plates are embedded in the tower column corresponding to the limit jacks at the ends of the cross bracing skeleton, and the limit plates are used for the piston rods of the limit jacks to abut against.

[0025] By adopting the above technical solution, the piston rod of the limit jack can abut against the corresponding limit plate. On the one hand, it is convenient to provide a more stable support point for the limit jack through the limit plate. On the other hand, it reduces the situation that the piston rod of the limit jack abuts against the concrete structure of the tower column for a long time, resulting in stress concentration acting on the concrete structure of the tower column and causing damage to the concrete structure of the tower column.

[0026] Preferably, limit grooves for the piston rods of the limit jacks to insert are opened on the limit plates.

[0027] By adopting the above technical solution, after the piston rod of the limit jack penetrates into the limit groove of the limit plate, the limit groove can restrict the up and down sliding of the piston rod of the limit jack, enabling the limit jack to abut against the limit plate more stably, which is beneficial to improving the connection stability between the limit jack and the limit plate.

[0028] Preferably, in step S2, when embedding the connecting rod and the connecting plate, the connecting rod and the connecting plate are welded and fixed to the internal steel reinforcement cage of the tower column through connecting bars.

[0029] By adopting the above technical solution, the load applied to the connecting rod and the connecting plate during subsequent construction of the cross bracing skeleton can be transferred to the internal steel bar structure of the tower column through the connecting bars, reducing the situation where the load is concentrated on the connecting rod and the connecting plate, resulting in deformation and damage of the connecting rod and the connecting plate due to stress, which is beneficial to further improving the connection integrity between the cross bracing skeleton and the two tower columns.

[0030] Preferably, a plurality of bull's eye bearings are installed at the bottom of the sliding seat.

[0031] By adopting the above technical solution, it is beneficial to reduce the friction force between the sliding seat and the lifting support. It is convenient to subsequently fine-tune the position of the sliding seat through the cooperation of the vertical adjustment jacks.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] 1. Prefabricate and assemble the bottom formwork of the cross beam and the cross bracing skeleton at the bottom of the two tower columns first and connect the bottom formwork of the cross beam and the cross bracing skeleton through suspension rods. After that, lift the cross bracing skeleton and the bottom formwork of the cross beam into place through the hoisting system and weld and fix the two ends of the cross bracing skeleton to the embedded parts of the two tower columns respectively. While using the cross bracing skeleton to limit the displacement of the two tower columns, complete the construction of the support of the bottom formwork of the cross beam; realize the integrated hoisting and lifting of the cross bracing skeleton and the bottom formwork into place, without the need for multiple hoisting operations, which is beneficial to reducing the construction difficulty of the bottom formwork of the cross beam.

[0034] 2. By installing a hoisting system on the connecting rod, the connecting rod can serve as the connection fulcrum of the upper chord of the subsequent cross bracing skeleton and also as the hoisting fulcrum of the hoisting system, without the need to install additional hoisting fulcrums at the top of the tower column, simplifying the overall construction steps.

[0035] 3. By installing a plurality of limit jacks at both ends of the cross bracing skeleton, on the one hand, when hoisting the cross bracing skeleton to the bottom of the installation gap between the connecting rods of the two tower columns, the piston rods of the limit jacks at both ends of the cross bracing skeleton can be first driven to abut against the opposite tower column and then the piston rods are controlled to extend and retract to adjust the lateral position of the cross bracing skeleton, so that the cross bracing skeleton better aligns with the installation gap between the relative connecting rods of the two tower columns, thereby facilitating the cross bracing skeleton to be more easily hoisted into the installation gap between the relative connecting rods of the two tower columns; on the other hand, after the cross bracing skeleton is hoisted into place, the piston rods are driven to abut against the limit plates embedded on the tower column through the limit jacks at both ends of the cross bracing skeleton, and the temporary fixation of the cross bracing skeleton can be realized, restricting the shaking of the cross bracing skeleton and facilitating the subsequent welding and fixation of the cross bracing skeleton. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram showing the state of assembling the bottom formwork of the cross beam in an embodiment of the present application.

[0037] Figure 2 It is a schematic diagram showing the state of assembling the cross brace skeleton in an embodiment of the present application.

[0038] Figure 3 It is a schematic diagram showing the state of installing the hoisting system in an embodiment of the present application.

[0039] Figure 4 It is Figure 3 an enlarged schematic diagram of part A in

[0040] Figure 5 It is a schematic diagram showing the state of hoisting the cross brace skeleton in an embodiment of the present application.

[0041] Figure 6 It is a schematic diagram showing the state of installing and welding the cross brace skeleton in an embodiment of the present application.

[0042] Explanation of reference numerals:

[0043] 1, tower column; 2, bottom formwork of cross beam; 21, assembling support frame; 22, three-way adjusting jack; 3, cross brace skeleton; 30, suspension rod; 31, connecting rod; 32, connecting plate; 33, limit jack; 34, limit plate; 341, limit groove; 4, hoisting system; 40, support rod; 41, hoisting support; 42, sliding seat; 43, through jack; 44, vertical adjusting jack; 45, horizontal adjusting jack. Detailed implementation manners

[0044] The following further describes the present application in detail with reference to the attached Figures 1-6 drawings.

[0045] An embodiment of the present application discloses a construction method for integrated lifting of a bridge tower cross beam skeleton, including the following steps:

[0046] S1: Setting the cross brace skeleton 3 and the bottom formwork of the cross beam: Referring to Figure 1 and Figure 2 , the specific steps are as follows.

[0047] S1.1: Operation of setting the assembling support frame 21: Set the assembling support frame 21 in the bottom area of the two tower columns 1; and install a number of three-way adjusting jacks 22 on one side of the assembling support frame 21;

[0048] S1.2: Sequentially set the assembling bottom formwork 2 of the cross beam and the cross brace skeleton 3 on the assembling support frame, and connect the bottom formwork 2 of the cross beam and the cross brace skeleton 3 through a number of suspension rods 30; In this embodiment, both the formwork of the bottom formwork 2 of the cross beam and the cross brace skeleton 3 are assembled and welded by a number of Bailey trusses; In other embodiments, the formwork of the bottom formwork 2 of the cross beam and the cross brace skeleton 3 can also be welded by steel.

[0049] S1.3: Tie the steel bar skeleton of the cross beam (not shown in the figure) in advance on the cross brace skeleton 3;

[0050] S1.4: fine-tune the position of the beam bottom mold 2 by the three-way adjustment jack 22 on the side of the assembly frame, so that the beam bottom mold 2 and the cross brace frame 3 are opposite to the beam construction station;

[0051] S1.5: Install a plurality of limit jacks 33 at both ends of the bottom of the cross brace frame 3 and make the piston rods of the limit jacks 33 face the adjacent tower column 1. The limit jacks 33 are fixed on the cross brace frame 3 through the reaction seat.

[0052] S2: Embedded parts installation: refer to Figure 2 and Figure 3 During the construction of the tower column 1, a plurality of connecting rods 31, a plurality of connecting plates 32 and a plurality of limiting plates 34 are pre-buried at the construction site of the cross beam.

[0053] The plurality of connecting rods 31 on the tower column 1 correspond one-to-one to the plurality of upper chords at the end of the cross bracing frame 3, and the connecting rods 31 are used to connect the corresponding upper chords at the end of the cross bracing frame 3; the plurality of connecting plates 32 on the tower column 1 correspond one-to-one to the plurality of lower chords at the end of the cross bracing frame 3, and the connecting plates 32 are used to connect the corresponding lower chords at the end of the cross bracing frame 3; the plurality of limiting plates 34 on the tower column 1 correspond one-to-one to the plurality of limiting jacks 33 at the end of the cross bracing frame 3, and the limiting plates 34 are also provided with limiting grooves 341 for the limiting jacks 33 to be inserted.

[0054] The connecting rod 31 , the connecting plate 32 and the limiting plate 34 are all welded and fixed to the internal steel bar structure of the tower column 1 through the connecting ribs during the pre-embedded construction.

[0055] S3: Lifting system 4 installation: refer to Figure 2 , Figure 3 and Figure 4 , a hoisting system 4 is installed above the plurality of connecting rods 31 .

[0056] The hoisting system 4 includes two hoisting supports 41. The two hoisting supports 41 are respectively welded to the tops of the connecting rods 31 on both sides of the tower column 1; through the above arrangement, the connecting rods 31 can be used as the upper chord connection nodes of the subsequent cross bracing frame 3, and can also be used as the hoisting fulcrums of the hoisting system 4.

[0057] The lifting supports 41 are all provided with slides 42, and through-hole jacks 43 are vertically installed on the slides 42; through the above arrangement, when the cross bracing frame 3 is subsequently lifted by the lifting system 4, the through-hole jacks 43 and the cross bracing frame 3 can be connected by slings, and then the slings can be tensioned by the through-hole jacks 43 to realize the lifting operation of the cross bracing frame 3.

[0058] The lifting support 41 and the sliding seat 42 are both provided with through holes for the lifting rope to pass through, and the through hole of the lifting support 41 is larger than the through hole of the sliding seat 42 .

[0059] A support rod 40 is further provided between the two lifting supports 41 , and the support rod 40 is connected to a slide seat 42 on the two lifting supports 41 by pulling.

[0060] The hoisting support 41 is provided with a vertical adjustment jack 44 and a lateral adjustment jack 45, both of which are fixed on the hoisting support 41 through a reaction seat, and the vertical adjustment jack 44 is located on the side of the slide 42 away from the connecting rod 31, and the piston rod of the vertical adjustment jack 44 is arranged in contact with the slide 42. The lateral adjustment jack 45 is arranged at two locations, and the two lateral adjustment jacks 45 are respectively located on the side of the slide 42 close to the tower column 1 and the side away from the tower column 1; the piston rods of the lateral adjustment jacks 45 are both in contact with the slide 42; the lateral adjustment jacks 45 and the vertical adjustment jacks 44 are arranged vertically. Through the above settings, the vertical adjustment jack 44 and the transverse adjustment jack 45 are used to limit the slide 42. At the same time, the position of the slide 42 can be adjusted by the vertical adjustment jack 44 and the transverse adjustment jack 45 to drive the through-hole jack 43 on the slide 42 to fine-tune the position of the cross-bracing frame 3 through the sling, so as to facilitate the subsequent lifting of the cross-bracing frame 3 into place.

[0061] A plurality of bull's eye bearings are installed at the bottom of the slide 42 , which is beneficial to reducing the friction between the slide 42 and the lifting support 41 , thereby facilitating the subsequent adjustment of the position of the slide 42 by the vertical adjustment jack 44 and the horizontal adjustment jack 45 .

[0062] S4: Lifting system 4 connection: refer to Figure 4 and Figure 5 , the through-core jack 43 is connected to the end of the lower chord of the cross-bracing frame 3 through a sling; so as to realize the connection between the lifting system 4 on the two tower columns 1 and the cross-bracing frame 3.

[0063] S5: Installation of cross brace frame 3 and bottom mold: refer to Figure 4 and Figure 5 , the specific steps are as follows.

[0064] S5.1: trimming and removing the upper chord of the cross brace frame 3: after lifting the cross brace frame 3 to a certain height by tensioning the sling through the through-hole jack 43, measure the distance between the relative connecting rods 31 of the two tower columns 1 by means of a laser rangefinder, and trim and remove the end of the upper chord of the cross brace frame 3 according to the distance between the relative connecting rods 31 of the two tower columns 1, so that the overall length of the upper chord of the cross brace frame 3 is adapted to the distance between the relative connecting rods 31 of the two tower columns 1.

[0065] S5.2: Formal hoisting of cross bracing frame 3: refer to Figure 4 and Figure 6 , the specific steps are as follows,

[0066] S5.2.1: Tension the sling through the through jack 43 on the hoisting support 41 to hoist the cross brace framework 3 until the upper chord of the cross brace framework 3 is located below the installation gap formed between the relative connecting rods 31 of the two tower columns 1;

[0067] S5.2.2: Coarse positioning of the cross brace framework 3: After the piston rod of the limit jack 33 at the end of the cross brace framework 3 is driven to extend and abuts against the tower column 1, the piston rod of the limit jack 33 at both ends of the cross brace framework 3 is driven to expand and contract to adjust the lateral position of the cross brace framework 3 until it is roughly opposite to the lower part of the installation gap formed between the cross brace framework 3 and the relative connecting rods 31 of the two tower columns 1, so as to realize the coarse positioning of the cross brace framework 3. After that, the piston rod of the limit jack 33 is driven to retract.

[0068] S5.2.3: Fine positioning of the cross brace framework 3: Fine-tune the position of the cross brace framework 3 through the lateral adjustment jack 45 in cooperation with the longitudinal adjustment jack until the cross brace framework 3 is opposite to the installation gap formed between the cross brace framework 3 and the relative connecting rods 31 of the two tower columns 1, so as to realize the fine positioning of the cross brace framework 3;

[0069] S5.2.4: The through jack 43 continues to tension the sling until the cross brace framework 3 is hoisted in place.

[0070] S6: Weld and fix the cross brace framework 3, refer to Figure 4 and Figure 6 , the specific steps are as follows,

[0071] S6.1: Limit and fix the cross brace framework 3: Drive the piston rod of the limit jack 33 at the end of the cross brace framework 3 to extend and tightly abut against the limit groove 341 of the corresponding limit plate 34 on the tower column 1;

[0072] S6.2: Weld and fix the upper chord of the cross brace framework 3 to the corresponding connecting rod 31; weld and fix the lower chord of the cross brace framework 3 to the corresponding connecting plate 32;

[0073] S6.3: Drive the piston rod of the limit jack 33 to retract; remove the limit jack 33 at the end of the cross brace framework 3.

[0074] In this embodiment, the hoisting and welding fixation of the cross brace framework 3 are both carried out at the lowest temperature at night to reduce the influence of temperature on the hoisting operation and welding operation of the cross brace framework 3.

[0075] After pre-assembling the bottom formwork 2 of the cross beam and the cross brace framework 3 at the bottom of the two tower columns 1 in advance in this application, connecting rods 31 for welding the upper chord of the cross brace framework 3 and connecting plates 32 for welding and fixing the lower chord of the cross brace framework 3 are embedded in the tower columns 1, and a hoisting system 4 is installed on the connecting rods 31. After integrally hoisting the cross brace framework 3 and the bottom formwork 2 of the cross beam in place through the hoisting system 4, the upper chord and the lower chord of the cross brace framework 3 are respectively welded and fixed to the corresponding connecting rods 31 and connecting plates 32. While restricting the displacement of the two tower columns 1 through the cross brace framework 3, the erection of the bottom formwork 2 of the cross beam is realized, and multiple hoisting operations are not required, which is beneficial to reducing the construction difficulty of the bottom formwork 2 of the cross beam.

[0076] The above are all the preferred embodiments of this application. The protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A method for integrated lifting construction of a bridge tower beam frame, characterized in that: The following steps are involved: S1: Supporting the cross brace frame (3) and the cross beam bottom form (2): supporting the cross beam bottom form (2) and the cross brace frame (3) at the bottom of the two tower columns (1), and connecting the cross beam bottom form (2) and the cross brace frame (3) through a suspension rod; installing a plurality of limit jacks (33) at the ends of the cross brace frame (3) and making the piston rods of the limit jacks (33) face the tower columns (1); S2: Installation of embedded parts: During the construction of the tower column (1), a plurality of connecting rods (31) and a plurality of connecting plates (32) are embedded in the construction position of the cross beam; the connecting rods (31) are used to connect the upper chord of the cross brace frame (3), and the connecting plates (32) are used to connect the lower chord of the cross brace frame (3); S3: Installation of the lifting system (4): installing the lifting system (4) above a plurality of connecting rods (31); S4: connecting the lifting system (4): connecting the lifting systems (4) on the two tower columns (1) with the cross bracing frame (3); S5: Hoisting of the cross brace frame (3) and the cross beam bottom form (2): hoisting the cross brace frame (3) and the cross beam bottom form (2) into place through the hoisting system (4); S6: Welding and fixing the cross brace frame (3): welding and fixing the upper chord of the cross brace frame (3) and the corresponding connecting rod (31); welding and fixing the lower chord of the cross brace frame (3) and the corresponding connecting plate (32); before welding and fixing the cross brace frame (3), the limiting jacks (33) at both ends of the cross brace frame (3) drive the corresponding piston rods to extend and press against the tower column (1); By setting the limiting jacks (33) at both ends of the cross brace frame (3), before the subsequent hoisting system (4) hoists the cross brace frame (3) to the installation gap between the connecting rods (31) of the two tower columns (1), the limiting jacks (33) at both ends of the cross brace frame (3) drive the piston rod to abut against the tower column (1), and then the limiting jacks (33) at both ends of the cross brace frame (3) drive the piston rod to extend and retract, so as to adjust the lateral position of the cross brace frame (3) to the installation gap between the cross brace frame (3) and the relative connecting rods (31) of the two tower columns (1). The gaps are roughly opposite to each other, thereby achieving rough positioning of the cross brace frame (3), and then cooperating with the transverse adjustment jack (45) of the lifting support (41) to further adjust the transverse position of the cross brace frame (3), thereby achieving precise positioning of the cross brace frame (3), making it easier for the lifting system (4) to lift the cross brace frame (3) into place; when a strong wind suddenly occurs during the lifting process of the cross brace frame (3), the limiting jack (33) at the end of the cross brace frame (3) drives its own piston rod to extend and abut against the tower column (1), so as to limit the cross brace frame (3) during the lifting process.

2. The method for integrated lifting construction of a bridge tower beam frame according to claim 1, characterized in that: The hoisting system (4) comprises two hoisting supports (41), the two hoisting supports (41) are respectively welded and fixed to the connecting rods (31) on both sides of the tower column (1), and the hoisting supports (41) are both installed with through-hole jacks (43); In step S4, the through-hole jack (43) is connected to the cross bracing frame (3) via a sling; In step S5, the slings are tensioned by the through-hole jack (43) to suspend the cross bracing frame (3) and the cross beam bottom formwork (2).

3. The method for integrated lifting construction of a bridge tower beam frame according to claim 2, characterized in that: The lifting support (41) is provided with a slide seat (42), the through-hole jack (43) is vertically installed on the slide seat (42), and the slide seat (42) and the lifting support (41) are both provided with through holes for the lifting rope to pass through; two sides of the slide seats (42) are connected to each other by support rods (40); the lifting support (41) is also provided with a vertical adjustment jack (44) and two horizontal adjustment jacks (45) The vertical adjustment jack (44) is located on the side of the slide (42) away from the support rod (40), and the piston rod of the vertical adjustment jack (44) abuts against the slide (42). The two lateral adjustment jacks (45) are respectively located on the side of the slide (42) facing the tower column (1) and the side away from the tower column (1), and the piston rods of the lateral adjustment jacks (45) abut against the slide (42).

4. The method for integrated lifting construction of a bridge tower beam frame according to claim 1, characterized in that: In step S2, when constructing the tower column (1), a plurality of limiting plates (34) are pre-buried on the tower column (1) corresponding to the plurality of limiting jacks (33) at the ends of the cross bracing frame (3), and the limiting plates (34) are used for abutting against the piston rods of the limiting jacks (33).

5. The method for integrated lifting construction of a bridge tower beam frame according to claim 4, characterized in that: The limiting plates (34) are each provided with a limiting groove (341) for the piston rod of the limiting jack (33) to be inserted into.

6. The method for integrated lifting construction of a bridge tower beam frame according to claim 1, characterized in that: In step S2, when the connecting rod (31) and the connecting plate (32) are pre-buried, the connecting rod (31) and the connecting plate (32) are fixed by welding to the inner steel cage of the tower column (1) via connecting ribs.

7. The method for integrated lifting construction of a bridge tower beam frame according to claim 3, characterized in that: A plurality of bull's eye bearings are installed at the bottom of the slide seat (42).

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