Steel structure combined support for bridge horizontal rotation and implementation method

Abstract

The invention discloses a steel structure combined support for bridge horizontal rotation, and belongs to the technical field of bridge construction, the steel structure combined support comprises a boosting counter-force seat detachably connected to a lower bearing platform and composed of a boosting outer anchor seat and a boosting inner anchor seat, and the boosting counter-force seat and the boosting inner anchor seat are arranged relative to the inner side and the outer side of a supporting foot; the upper temporary locking anchor seat is detachably connected to the upper bearing platform; and the temporary locking anchoring member is detachably connected between one group of opposite upper temporary locking anchor bearing and boosting outer anchor bearing. The steel structure combined support not only can solve the problem of space limitation in the existing design, but also can be conveniently disassembled and reused after construction, so that the construction cost and resource waste are reduced, and the steel structure combined support contributes to the development of the future bridge construction technology. The invention further provides an implementation method of the steel structure combined support for bridge horizontal rotation.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction, and provides a steel structure combined support for bridge horizontal rotation and an implementation method. Background Art

[0002] Since the bridge rotation construction technology was first developed in France in the 1940s, it has undergone significant evolution and progress. In particular, the first application of the horizontal rotation method in 1976 laid the foundation for subsequent practical applications on various bridge types. With the continuous development of bridge construction technology in my country, the application of rotating bridges has become more and more extensive, especially in high-speed railway construction. Although bridge rotation technology has made significant progress, it still faces some challenges and room for improvement in actual operation. For example, when the bridge is rotated, the rotation of the beam may not be started due to insufficient power, or the remedial measures for the large angle used for horizontal rotation construction are too large. Therefore, the current construction method introduces a jack-assisted reaction force structure, which is used to assist or push back by installing an I-beam and a reverse jack to ensure the smooth progress of the rotation process.

[0003] However, the inner / outer reaction seats in traditional rotation construction use concrete structures, and multiple sets of small templates need to be made during the integral pouring process with the lower pedestal, which increases the complexity of construction and is also cumbersome to install and fix. At the same time, due to the mechanical properties of concrete itself, its structural dimensions occupy most of the space inside and outside the slideway, and will cause certain interference to the subsequent construction of the rotation load-bearing series; in addition, the cast-in-place reinforced concrete structure cannot be used in a turnover manner, and the small gap affects the concrete pouring and vibration between the upper and lower pedestals.

[0004] In addition, the rotation construction is a delicate and complex engineering construction. In order to prevent the back-thrust problem caused by multiple turns during construction, a certain distance will be reserved for fine-tuning. Limited by construction time, climate and other factors, the traditional method is to connect and anchor the steel bars of the upper and lower pedestals before fine-tuning. The installation workload is large, and the steel bars need to be dismantled and reinstalled before fine-tuning.

[0005] Therefore, the above problems prompt us to find a new solution to simplify the construction process and improve construction efficiency. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a steel structure composite support for bridge horizontal rotation that is moderate in size, stable in structure, easy to install and disassemble, and recyclable, so as to save construction space and improve construction operation efficiency. Another purpose of the present invention is to provide an implementation method for the steel structure composite support for bridge horizontal rotation.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The present invention provides a steel structure composite bearing for bridge translation, comprising: a boost reaction seat, which is detachably connected to the lower pedestal, and is composed of a boost outer anchor seat and a boost inner anchor seat, and the two are arranged relative to the inner and outer sides of the support leg; an upper temporary locking anchor seat, which is detachably connected to the upper pedestal; and a temporary locking anchor member, which is detachably connected between a group of relative upper temporary locking anchor seats and the boost outer anchor seat. By adopting the above scheme, the design of the composite bearing optimizes the volume and saves construction space while ensuring strength and stability. And through reasonable mechanical design, it is ensured that the bearing can stably distribute and transmit the reaction force during the load-bearing process. And the various parts of the composite bearing are all detachably connected, which is convenient for rapid installation and disassembly during the construction process, reducing construction time and labor costs. The material properties of the steel structure enable the bearing to be reused in different construction projects, meeting the requirements of environmental protection and economic benefits.

[0009] Optionally, the booster outer anchor seat, the booster inner anchor seat and the upper temporary locking anchor seat are all composed of an angle base and a ribbed plate. The ribbed plate is provided in at least one piece and is arranged on the inner side of the angle base. The angle base is provided with mounting holes for connecting with embedded anchor bolts. The embedded anchor bolts are arranged on the upper pedestal or the lower pedestal. In this way, the combined design of the angle base and the ribbed plate provides good bending and shear resistance, ensuring that the bridge can remain stable during rotation. The design of the embedded anchor bolts makes the support installation process easier and reduces the complexity of on-site construction. At the same time, since the design of the anchor seat can be adjusted according to the specific bridge structure, its flexibility and adaptability in different construction environments are enhanced.

[0010] Optionally, the ribbed plates in the booster outer anchor seat and the upper temporary locking anchor seat are each provided with a pin hole for connecting with the temporary locking anchor member, and the ribbed plates are provided with a reinforcement plate at the pin hole. In this way, by adding a reinforcement plate at the pin hole, the force can be effectively dispersed, the stability of the connection can be enhanced, and the potential damage caused by dynamic loads can be reduced. The design of the pin hole makes the installation and removal of the temporary locking anchor member more convenient, reducing construction time and labor costs. At the same time, the combination of the design of the ribbed plate and the reinforcement plate can effectively reduce the risk of failure of the anchor seat during the rotation process and improve the safety of construction.

[0011] Optionally, a wedge block is connected to the booster outer anchor seat to resist the reverse thrust beam with the steel plate. In this way, the design of the wedge block can effectively resist the reverse force, provide additional support, and prevent instability during the jacking process. And by pre-processing and adjusting the structural angle, the wedge block can adapt to different construction requirements, enhancing the flexibility of the support system.

[0012] Optionally, the temporary locking anchor member is composed of an anchor joint, an anchor rod, and an adjustable lock. Two anchor rods are provided, and the two anchor rods are connected at opposite ends by an adjustable lock, and the two anchor rods are connected to the temporary locking anchor seat and the booster outer anchor seat respectively at the opposite ends by an anchor joint. In this way, the design of the adjustable lock allows the length of the anchor rod to be adjusted according to actual needs, so as to adapt to different construction environments and conditions. And through the use of the anchor joint, the connection strength between the anchor member and the anchor seat can be effectively enhanced to ensure safety during the construction process. The design of the two anchor rods makes the installation and disassembly process more convenient, reducing the complexity and time consumption of on-site construction.

[0013] Optionally, four sets of temporary locking anchor members are arranged around the upper pedestal, and the two sets of temporary locking anchor members relative to any pair of opposite sides of the upper pedestal are arranged in a spatial scissor-like staggered arrangement. In this way, the design of the four sets of anchor members ensures that the upper pedestal can obtain uniform support in four directions, thereby improving the safety of the overall structure. The scissor-like staggered arrangement improves the structure's ability to resist lateral forces and can effectively resist lateral forces that may occur during the rotation process. And due to the reasonable layout of the anchor members, it can provide greater stability during the construction process, reduce construction risks, and ensure the safety of construction workers.

[0014] Optionally, the upper platform is provided with four upper temporary locking anchor seats connected to the upper ends of four sets of temporary locking anchor members on two opposite diagonal sides thereof; the lower platform is provided with four booster outer anchor seats connected to the lower ends of four sets of temporary locking anchor members on a pair of opposite sides of the upper platform. In this way, the anchor seat design of the upper platform and the lower platform and the connection of the temporary locking anchor members form a stable support system. By providing anchor seats in the opposite diagonals and opposite sides, the force is evenly distributed on the structure, reducing the risk of excessive local force and improving overall safety.

[0015] The present invention is also based on the above-mentioned construction method of the steel structure combined support for bridge horizontal rotation, comprising the following steps:

[0016] S1. Remove the temporary anchoring vertical reinforcement between the lower pedestal and the upper pedestal;

[0017] S2. Before the bridge rotates, a set of boost reaction seats is installed at least in four directions of the lower pedestal, and four upper temporary locking anchor seats connected to the upper ends of four sets of temporary locking anchor members are arranged on the upper pedestal and on two opposite diagonal sides thereof, and four boost outer anchor seats connected to the lower ends of four sets of temporary locking anchor members are arranged on a pair of opposite sides of the lower pedestal relative to the upper pedestal;

[0018] S3. During the bridge rotation, the booster jack is used under the booster reaction seat to assist the rotation of the turntable of the upper bearing platform, and the upper bearing platform is rotated to the reserved fine adjustment angle;

[0019] S4. Install four sets of temporary locking anchoring components to implement temporary anchoring connection between the lower pedestal and the upper pedestal;

[0020] S5. Remove the four sets of temporary locking anchor members and fine-tune the upper bearing platform to the designed position;

[0021] S6. After the rotation of the bridge is completed, all the booster reaction seats and the booster outer anchor seats and upper temporary locking anchor seats used to connect the temporary locking anchor members are removed, and the upper and lower vertical and horizontal steel bars between the lower and upper pedestals are tied and poured.

[0022] Preferably, in step S5, thrust beams with stuffed steel plates are installed on at least two sets of thrust reaction seats to prevent over-rotation of the rotation, and the steel plates are pulled out while rotating during fine adjustment.

[0023] Preferably, in step S3, if the upper bearing platform rotation body is over-rotated, a reverse thrust beam with a stuffed steel plate is installed to rotate in the reverse direction to a reserved fine-tuning angle.

[0024] The beneficial effects of the present invention are:

[0025] 1. The steel structure combined support for bridge rotation of the present invention has the advantages of moderate volume, small structural size, stable structure, convenient installation and disassembly, flexible construction and small interference. This new reaction seat can not only solve the space limitation problem in the existing design, but also can be easily disassembled and reused after construction, and can be used multiple times once, thereby reducing construction costs and resource waste, and contributing to the development of future bridge construction technology.

[0026] 2. The steel structure combined support for bridge horizontal rotation of the present invention adopts bidirectional locking to avoid unidirectional pulling of the swivel mechanism, that is, the A side is locked clockwise, and the B side is locked counterclockwise, and the bidirectional tension forms a scissor-fork staggered model. That is, in the scissor-fork staggered model, the temporary anchors at the AⅠ\BI and AⅢ\BⅢ ends relative to the upper pedestal are pulled on the upper temporary locking anchor seat, while the temporary anchors at the AⅡ\BⅣ and AⅣ\BⅡ ends are pulled on the boosting outer anchor seat, and the boosting outer anchor seat at the AⅡ / AⅣ position is also used as an anchor seat for cooperating with the reverse thrust beam with a stuffing steel plate to prevent the swivel from over-rotation and connected to the temporary locking anchor member.

[0027] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0029] Figure 1 It is a front schematic diagram of the steel structure combined support for bridge horizontal rotation of the present invention;

[0030] Figure 2 for Figure 1 Schematic diagram of top view;

[0031] Figure 3 for Figure 1 Schematic diagram of the booster outer anchor seat, wherein: a is a top view, b is a front view, and c is a side view;

[0032] Figure 4 for Figure 1 Schematic diagram of the booster inner anchor seat, wherein: a is a top view, b is a front view, and c is a side view;

[0033] Figure 5 for Figure 1 Schematic diagram of the upper temporary locking anchor seat, wherein: a is a top view, b is a front view, and c is a side view;

[0034] Figure 6 for Figure 1 Schematic diagram of temporary locking anchor member in, wherein: a is a front view, b is a top view;

[0035] Figure 7-Figure 12 It is a schematic diagram of the construction process of the steel structure combined support for bridge horizontal rotation of the present invention;

[0036] Figure markings: 1-boost outer anchor seat; 2-boost inner anchor seat; 3-upper temporary locking anchor seat; 4-temporary locking anchor member; 5-reverse thrust beam with stuffing steel plate; 6-temporary anchoring vertical reinforcement; 7-lower pedestal; 8-upper pedestal; 9-support foot; 11-corner base, 12-mounting hole, 13-ribbed plate, 14-reinforcement plate, 15-embedded anchor bolt, 16-wedge block; 41-anchor joint, 42-anchor rod, 43-adjustable lock; A\B are schematic diagrams of opposite sides relative to the upper pedestal; Ⅰ, Ⅱ, Ⅲ, Ⅳ are schematic diagrams of four corner positions in the clockwise direction relative to the upper pedestal. DETAILED DESCRIPTION

[0037] The present invention is further described below in conjunction with specific implementation methods. The accompanying drawings are only used for exemplary descriptions and are only schematic diagrams, not actual drawings, and cannot be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0038] like Figure 1-6 As shown, the steel structure composite support for bridge horizontal rotation mentioned in the present invention includes: a boost reaction seat, which is detachably connected to the lower pedestal 7 and is composed of a boost outer anchor seat 1 and a boost inner anchor seat 2; the design of the boost outer anchor seat 1 and the boost inner anchor seat 2 enables them to be arranged relative to the inner and outer sides of the support foot 9, so as to provide necessary reaction force support during the bridge rotation process and ensure the stability of the rotation process. The upper temporary locking anchor seat 3 is detachably connected to the upper pedestal 8, and is intended to provide a temporary connection and fixation for the bridge rotation. Its design enables the movement of the bridge rotation to be effectively limited when it is paused according to construction requirements during the rotation process, ensuring the accuracy and safety of the entire construction process; and the temporary locking anchor member 4 is detachably connected between a group of relative upper temporary locking anchor seats 4 and the boost outer anchor seat 1. Through the connection of the temporary locking anchor member 4, the stability of the upper pedestal 8 relative to the lower pedestal 7 during the rotation can be temporarily enhanced to prevent unnecessary displacement or tilt during the rotation process. Through the above design, the steel structure combined support for bridge horizontal rotation of the present invention will effectively improve the efficiency and safety of bridge rotation construction, and provide an innovative solution for modern bridge construction.

[0039] Specifically, the booster outer anchor seat 1, the booster inner anchor seat 2 and the upper temporary locking anchor seat 3 are all composed of an angle base 11 and a ribbed plate 13. The ribbed plate 13 is provided as at least one piece and is arranged on the inner side of the angle base 11 to enhance the overall stability and bearing capacity of the structure. The angle base 11 is the main load-bearing structure, and is provided with mounting holes 12 for connecting with embedded anchor bolts 15. Through these mounting holes 12, the angle base 11 can be firmly connected with the embedded anchor bolts 15 arranged on the upper pedestal 8 or the lower pedestal 7, and the embedded anchor bolts 15 can ensure stable fixation during the installation process of the angle base. In addition, the ribbed plates 13 in the booster outer anchor seat 1 and the upper temporary locking anchor seat 3 are provided with pin holes for connecting with the temporary locking anchor member 4. The design of these pin holes enables the temporary locking anchor member to be conveniently and firmly connected to the anchor seat, thereby enhancing the overall structural stability. In addition, the ribbed plate 13 is provided with a reinforcing plate 14 at the pin holes. The function of the reinforcing plate 14 is to increase the strength of the area around the pin hole to prevent local deformation or damage caused by concentrated force during the load-bearing process. This design can significantly improve the durability and bearing capacity of the anchor seat, ensuring that the connection part can withstand large reaction forces and tension during the bridge rotation construction. The temporary locking anchor member 4 is composed of an anchor joint 41, an anchor rod 42, and an adjustable lock 43. Its design purpose is to provide temporary fixing and locking functions during the bridge rotation construction process. The anchor rod 42 is set to two, and the two anchor rods 42 are connected at the opposite corresponding ends by an adjustable lock 43. This design allows the length of the anchor rod 42 to be adjusted, thereby ensuring flexible adaptation in different construction stages. The two anchor rods 42 are connected to the temporary locking anchor seat 3 and the booster outer anchor seat 1 at the opposite diverging ends through an anchor joint 41. This connection method ensures a firm connection between the anchor member and the anchor seat and improves the stability of the entire support system.

[0040] In this embodiment, a wedge block 16 for resisting the reverse thrust beam 5 with a stuffed steel plate is connected to the booster outer anchor seat 1. Its main function is to resist the reverse thrust beam 5 with a stuffed steel plate. In order to achieve the best working effect, the processing of the wedge block 16 will be carried out in advance and accurately adjusted according to specific construction requirements. By adjusting the structural angle, the wedge block can adapt to different construction environments and needs, thereby achieving flexible application. In this way, in the construction of the bridge rotation, when reverse jacking is required, the wedge block is welded to the reaction seat of the booster outer jack, and the wedge block can effectively provide the required reaction force support to ensure the stability of the reverse thrust beam. It not only ensures the firmness of the connection, but also can respond quickly in actual construction, reducing construction time.

[0041] In this embodiment, the temporary locking anchor members 4 are arranged in four sets, which are arranged around the upper platform 8. This layout can ensure that the bridge can obtain sufficient support and stability in four directions during the rotation construction process. And the two sets of temporary locking anchor members 4 on any pair of opposite sides of the upper platform 8 are arranged in a spatial scissor-like staggered arrangement. This design method increases the lateral force resistance of the structure and improves the overall stiffness and stability of the support system. The scissor-like staggered arrangement allows the forces in different directions on the two opposite sides to be effectively transmitted through the staggered configuration of the anchor members, thereby reducing the stress concentration and deformation that may occur during the rotation process. The upper platform 8 is also provided with four upper temporary locking anchor seats 3 connected to the upper ends of the four sets of temporary locking anchor members 4 on both sides of a pair of opposite corners; the lower platform 7 is provided with four booster outer anchor seats 1 connected to the lower ends of the four sets of temporary locking anchor members 4 on a pair of opposite sides of the upper platform 8. At the same time, in order to avoid unidirectional pulling of the rotation mechanism, bidirectional locking is adopted, that is, the A side is locked clockwise, and the B side is locked counterclockwise, and the bidirectional tension forms a scissor-like staggered model. That is, in the scissor-staggered model, the temporary anchors at the AⅠ\BⅠ and AⅢ\BⅢ ends relative to the upper pedestal are pulled to the upper temporary locking anchor seat, while the temporary anchors at the AⅡ\BⅣ and AⅣ\BⅡ ends are pulled to the booster outer anchor seat, and the booster outer anchor seat at the AⅡ / AⅣ position is also used as an anchor seat for cooperating with the reverse thrust beam with stuffed steel plate to prevent over-rotation of the rotation body and to be connected to the temporary locking anchor member.

[0042] like Figure 7-12 As shown, the construction method of the steel structure composite support for the horizontal rotation of the bridge is described in detail, including the following steps:

[0043] S1, release the temporary anchoring vertical reinforcement 6 between the lower pedestal 7 and the upper pedestal 8; the temporary anchoring vertical reinforcement 6 can quickly lock the rotating structure and quickly unlock it before and after the rotation;

[0044] S2. Before the bridge is rotated, a set of boost reaction seats are installed at four positions of the lower pedestal 7, and four upper temporary locking anchor seats 3 connected to the upper ends of four sets of temporary locking anchor members 4 are arranged on the upper pedestal 8 and on two opposite diagonal sides thereof, and four boost outer anchor seats 1 connected to the lower ends of four sets of temporary locking anchor members 4 are arranged on a pair of opposite sides of the lower pedestal 7 relative to the upper pedestal 8; the installation of these components provides necessary reaction force support and temporary connection and fixation for the subsequent bridge rotation, thereby improving construction safety;

[0045] S3. During the bridge rotation, the booster jack is used to assist the rotation of the turntable of the upper bearing platform 8 under the booster reaction seat, and the upper bearing platform 8 is rotated to the reserved fine adjustment angle; if the upper bearing platform 8 rotates too far, the reverse thrust beam 5 with a stuffing steel plate is installed to rotate in the reverse direction to the reserved fine adjustment angle; to ensure that the upper bearing platform 8 is stably controlled during the rotation process and can be adjusted to the predetermined angle in time;

[0046] S4, installing four sets of temporary locking anchoring members 4, and implementing temporary anchoring connection between the lower pedestal 7 and the upper pedestal 8; through the temporary anchoring connection, the structural stability is further enhanced to ensure that no displacement occurs in subsequent operations;

[0047] S5, remove the four sets of temporary locking anchor members 4, and make the upper platform 8 rotate and fine-tune to the designed position; in this process, install the reverse thrust beam 5 with filling steel plate on at least two sets of booster reaction seats to prevent over-rotation of the rotation, and pull out the steel plate while rotating during fine-tuning; ensure that the upper platform 8 reaches the designed position during the fine-tuning process, and avoid over-rotation to ensure accuracy;

[0048] S6. After the rotation of the bridge is completed, all the boost reaction seats and the boost outer anchor seat 1 and the upper temporary locking anchor seat 3 used to connect the temporary locking anchor member 4 are removed, and the upper and lower vertical and horizontal steel bars between the lower pedestal 7 and the upper pedestal 8 are tied and poured to ensure the integrity and bearing capacity of the bridge structure.

[0049] Through the above construction steps, the construction method of the steel structure composite support for bridge horizontal rotation has significantly improved the safety, efficiency and economy of bridge rotation construction through reasonable design and innovative structural layout. And each step has been carefully designed to meet the needs of modern bridge rotation construction, improve construction efficiency and ensure construction quality.

[0050] Finally, it should be noted that 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, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A steel structure combined support for bridge horizontal rotation, characterized in that: include: The boost reaction seat is detachably connected to the lower support platform (7) and is composed of a boost outer anchor seat (1) and a boost inner anchor seat (2), and the two are arranged on the inner and outer sides relative to the support leg (9); the upper temporary locking anchor seat (3) is detachably connected to the upper support platform (8); and the temporary locking anchor member (4) is detachably connected between a group of opposite upper temporary locking anchor seats (3) and the boost outer anchor seat (1).

2. The steel structure combined bearing for bridge rotation according to claim 1 is characterized in that: The boost outer anchor seat (1), the boost inner anchor seat (2) and the upper temporary locking anchor seat (3) are all composed of an angle base (11) and a ribbed plate (13). The ribbed plate (13) is provided in at least one piece and is arranged on the inner side of the angle base (11). The angle base (11) is provided with a mounting hole (12) for connecting with a pre-buried anchor bolt (15). The pre-buried anchor bolt (15) is provided on the upper support platform (8) or the lower support platform (7).

3. The steel structure combined bearing for bridge rotation according to claim 2 is characterized in that: The ribbed plates (13) in the boosting outer anchor seat (1) and the upper temporary locking anchor seat (3) are each provided with a pin hole for connecting with the temporary locking anchor member (4), and the ribbed plates (13) are provided with a reinforcing plate (14) at the pin hole.

4. The steel structure combined bearing for bridge horizontal rotation according to any one of claims 1 to 3, characterized in that: The boosting outer anchor seat (1) is connected with a wedge-shaped block (16) for resisting the reverse thrust beam (5) with a stuffing steel plate.

5. The steel structure combined bearing for bridge horizontal rotation according to claim 4 is characterized in that: The temporary locking anchor member (4) is composed of an anchor joint (41), an anchor rod (42), and an adjustable lock head (43). Two anchor rods (42) are provided, and the two anchor rods (42) are connected at opposite ends through the adjustable lock head (43). The two anchor rods (42) are connected to the upper temporary locking anchor seat (3) and the boosting outer anchor seat (1) respectively through an anchor joint (41) at their opposite ends.

6. The steel structure combined bearing for bridge horizontal rotation according to claim 1 is characterized in that: The temporary locking anchoring members (4) are provided in four sets, which are arranged around the upper support platform (8), and the two sets of the temporary locking anchoring members (4) relative to any pair of opposite sides of the upper support platform (8) are arranged in a spatial scissor-cross staggered manner.

7. The steel structure combined bearing for bridge horizontal rotation according to claim 6 is characterized in that: The upper support platform (8) is provided with four upper temporary locking anchor seats (3) connected to the upper ends of four sets of temporary locking anchor members (4) on a pair of opposite sides relative to the upper support platform (8); the lower support platform (7) is provided with four boosting outer anchor seats (1) connected to the lower ends of four sets of temporary locking anchor members (4) on a pair of opposite sides relative to the upper support platform (8).

8. The construction method of the steel structure composite support for bridge horizontal rotation according to any one of claims 1 to 7 is characterized in that: The steps include: S1, releasing the temporary anchoring vertical reinforcement (6) between the lower pedestal (7) and the upper pedestal (8); S2. Before the bridge rotates, a set of boost reaction seats is installed on at least four positions of the lower pedestal (7), and four upper temporary locking anchor seats (3) connected to the upper ends of four sets of temporary locking anchor members (4) are provided on a pair of opposite diagonal sides of the upper pedestal (8), and four boost outer anchor seats (1) connected to the lower ends of the four sets of temporary locking anchor members (4) are provided on a pair of opposite sides of the lower pedestal (7) relative to the upper pedestal (8); S3, during the bridge rotation, the booster jack is used to assist the turntable of the upper support platform (8) under the booster reaction seat to rotate, and the upper support platform (8) is rotated to a reserved fine adjustment angle; S4, installing four sets of temporary locking anchor members (4) to implement temporary anchoring connection between the lower pedestal (7) and the upper pedestal (8); S5, dismantling the four sets of temporary locking anchor members (4), and rotating the upper support platform (8) to the designed position; S6. After the bridge is rotated, all the boost reaction seats and the boost outer anchor seat (1) and the upper temporary locking anchor seat (3) used to connect the temporary locking anchor member (4) are removed, and the upper and lower vertical steel bars and horizontal steel bars between the lower pedestal (7) and the upper pedestal (8) are tied and poured.

9. The construction method according to claim 8, characterized in that: In step S5, a thrust beam (5) with a stuffed steel plate is installed on at least two groups of thrust-reaction seats to prevent over-rotation of the rotation, and the steel plate is pulled out while the rotation operation is performed during fine adjustment.

10. The construction method according to claim 9, characterized in that: In step S3, if the upper support platform (8) is over-rotated, the reverse push beam (5) with a filler steel plate is installed to rotate in the reverse direction to a reserved fine adjustment angle.

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