Continuous beam bridge cast-in-place section corbel bracket hoisting and precise alignment construction method

Abstract

The invention discloses a continuous beam bridge cast-in-place section corbel bracket hoisting and accurate alignment construction method, which belongs to the technical field of corbel bracket construction, and comprises the following steps: S1, bracket structure design: adopting a triangular bracket as a load-bearing system, selecting double-spliced channel steel as a bracket diagonal rod, selecting double-spliced channel steel as a longitudinal rod, and pre-embedding and connecting with a pier body through a climbing cone; according to the method, a triangular bracket bearing system is adopted, the inclined rods and the longitudinal rods are both made of double-spliced channel steel, climbing cones are accurately pre-buried through a positioning plate with the thickness of 16 mm, reliable connection of the bracket and a pier body is achieved, and the risk that a traditional support is not firm in anchoring is avoided; meanwhile, when the bracket is machined in a factory, the splicing welding seam quality is strictly detected, the attachment degree of connecting nodes is checked through on-site pre-assembly, stage-by-stage pre-pressing is carried out, stability is judged when the final two-time settlement difference is smaller than or equal to 2 mm, the bearing capacity of the bracket can be effectively verified, inelastic deformation is eliminated, and construction safety is guaranteed in the whole process from structural design, machining and installation to load inspection; and hidden dangers of deviation, instability and the like of the frame body are reduced.

Description

Technical Field

[0001] This invention belongs to the field of corbel bracket construction technology, specifically a method for hoisting and precisely aligning corbel brackets in cast-in-place sections of continuous beam bridges. Background Technology

[0002] In the construction of modern long-span concrete cable-stayed bridges, the corbel bracket, as the core transition segment connecting the pier and the main beam, is a key node for the transfer of force throughout the bridge. Its construction quality directly determines the safety and alignment accuracy of the subsequent cantilever construction of the beam. Moreover, the corbel bracket construction needs to withstand the huge load of the subsequent cantilever pouring stage, which places extremely high demands on the load-bearing capacity, stability and installation accuracy of the support system (corbel bracket).

[0003] A search revealed existing technology (application number: CN201410142799.8), which describes a method for simultaneous construction of bridge piers and crossbeam corbel brackets. This invention proposes a novel corbel bracket method, where corbels are welded onto the pier model. After the pier model is installed, a bracket platform for the tie beam construction is erected on the corbels. Subsequently, subsequent processes such as laying the tie beam bottom formwork, tying the top slab reinforcement, installing the tie beam side formwork, and pouring concrete for the pier and crossbeam are carried out sequentially. This construction method achieves simultaneous construction of the pier and crossbeam, effectively reducing the construction cycle of various parts of the bridge substructure (piers, crossbeams, etc.), significantly accelerating the bridge construction progress, and ensuring technical safety and controllability. Furthermore, compared to traditional construction methods, its operation process is simpler and requires lower costs.

[0004] In the aforementioned existing technologies, the brackets are mostly assembled steel structures that are cut and welded on-site. Due to factors such as narrow on-site construction space and harsh welding environment, it is difficult to control the processing accuracy of the bracket components. In addition, a large number of on-site welding operations are prone to weld defects (such as undercut, arc crater, slag inclusion, etc.), resulting in insufficient overall rigidity of the bracket. At the same time, the connection between the bracket and the pier body mostly relies on ordinary pre-embedded bolts or steel plates, lacking precise positioning measures. During the pre-embedding process, it is only roughly controlled by manual layout. The positional deviation of key pre-embedded components such as the climbing cone often exceeds 15mm. During the subsequent installation of the bracket, it is necessary to repeatedly chisel away the pier body concrete for adjustment, which not only damages the structural integrity of the pier body, but also prolongs the construction period. Summary of the Invention

[0005] The purpose of this invention is to provide a method for hoisting and precisely aligning the corbel brackets of cast-in-place sections of continuous beam bridges, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for hoisting and precisely aligning corbel brackets in the cast-in-place section of a continuous beam bridge, comprising the following steps:

[0007] S1: The support structure design adopts a triangular bracket as the load-bearing system. The bracket diagonal rod is made of double-channel steel, and the longitudinal rod is made of double-channel steel. It is connected to the pier body through climbing cones. The climbing cones are pre-embedded during the pier construction and fixed with 16mm thick positioning plates. The positioning plates are spot-welded to the main reinforcement on the outside of the pier body, and the two opposite climbing cones are positioned by laying out lines and fixed with the help of steel bars.

[0008] S2: Lifting preparation: The bracket is processed in parts at the factory. After processing, it is transported to the site for pre-assembly. After the pre-assembly is qualified, it is lifted into place by a 25t truck crane. It is connected to the embedded parts of the pier body through φ80 and φ100 pins. After connection, safety pins are inserted to fix it.

[0009] S3: Precise alignment is achieved by using a total station in conjunction with an auxiliary disc with a central prism groove to check the installation coordinates of the bracket, ensuring that the plane position deviation is ≤±5mm; the bracket elevation is adjusted by using a cup-buckle bracket top support, first by coarse adjustment using suspension cables, and then by fine adjustment using adjusting bolts, controlling the elevation deviation to ≤2mm; the gap between the bracket and the pier body is filled with thin steel plates and welded for fixation.

[0010] S4: Acceptance and preloading. After the support is installed, it is inspected. After the acceptance is qualified, it is preloaded in stages according to 60%, 100% and 110% of the construction load. During the preloading process, the settlement value is monitored. When the difference between the last two settlements is ≤2mm, the support is judged to be stable. The bottom formwork elevation is adjusted according to the preloading data.

[0011] As a further preferred embodiment of this technical solution: In step S1, the climbing cone positioning plate is made with positioning holes according to the size of the climbing cone cone barrel, the climbing cone is fixed in the positioning holes, and after the positioning plate is spot welded to the main reinforcement on the outer side of the pier body, the elevation and angle of the climbing cone are checked multiple times.

[0012] As a further preferred option of this technical solution: In step S2, when the bracket is processed into parts at the factory, the splicing weld of the double-channel steel is inspected to ensure that there are no defects such as undercut, cracks, arc craters, or slag inclusions; during on-site pre-assembly, the fit of the connection nodes of each component of the bracket is checked, and adjustments are made in a timely manner if the deviation exceeds the limit.

[0013] As a further preferred embodiment of this technical solution: In step S2, when the 25t truck crane lifts the bracket, a double-lifting-point lifting method is adopted, with the lifting points set at the connection between the longitudinal and diagonal rods of the bracket.

[0014] As a further preferred embodiment of this technical solution: In step S3, when the total station checks the installation coordinates of the bracket, one monitoring point is set at the end of each of the longitudinal and diagonal rods of the bracket, and each monitoring point is measured at least 3 times, and the average value is taken as the final coordinate value.

[0015] As a further preferred embodiment of this technical solution: In step S3, when adjusting the elevation of the bracket by the top support of the bowl buckle bracket, the adjustment amount of the top support shall not exceed 5mm each time. After adjustment, a spirit level shall be used to check the levelness of the top surface of the bracket to ensure that the levelness deviation is ≤1mm / m.

[0016] As a further preferred embodiment of this technical solution: In step S3, when the thin steel plate fills the gap between the bracket and the pier, the thickness of the thin steel plate is selected according to the size of the gap, and the welding length between the thin steel plate and the bracket and the pier is not less than 50mm, and the weld height is not less than 6mm.

[0017] As a further preferred embodiment of this technical solution: In step S4, during preloading, concrete blocks are used as the loading weights. The concrete blocks are stacked on the bracket according to the principle of uniform distribution, and after each loading is completed, the load is left to stand still for 1 hour before settlement monitoring is carried out.

[0018] As a further preferred embodiment of this technical solution: In step S4, a high-precision level is used for preloading settlement monitoring. The monitoring frequency is once after each loading stage, once every two hours after loading is completed, until the settlement difference between the last two monitoring stages is ≤2mm.

[0019] As a further preferred embodiment of this technical solution: after the bracket is installed, it is also necessary to check the tightening torque of the bolts connecting the bracket and the pier body.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. In this invention, a triangular bracket load-bearing system is adopted, with double-channel steel used for both the diagonal and longitudinal bars. A 16mm thick positioning plate is used to precisely embed climbing cones to achieve a reliable connection between the bracket and the pier body, avoiding the risk of weak anchoring of traditional supports. At the same time, the quality of the splicing welds is strictly inspected during the component processing in the bracket factory, and the fit of the connection nodes is checked during on-site pre-assembly. Graded pre-stressing is performed, and stability is determined by the difference between the last two settlements being ≤2mm. This can effectively verify the load-bearing capacity of the support and eliminate inelastic deformation. The entire process from structural design, processing and installation to load testing ensures construction safety and reduces the hidden dangers of frame displacement and instability.

[0022] 2. Among them, the coordinates of the bracket installation are checked by using a total station with an auxiliary disc with a central prism groove to control the plane position deviation to ≤±5mm; the elevation deviation is controlled to ≤2mm by using a combination of "coarse adjustment + fine adjustment" of the cup-buckle bracket top support, and the gap between the bracket and the pier body is filled with thin steel plate by welding to achieve uniform force transmission, laying the foundation for the linear accuracy of the subsequent beam construction.

[0023] 3. The bracket adopts a modular design, and the double-channel steel combination structure can be prefabricated in the factory and quickly assembled on site, reducing on-site welding work and shortening the construction cycle. The 25t truck crane lifts the whole structure into place and fixes it with φ80 and φ100 pins and safety pins, simplifying the installation process. At the same time, the pre-stressing data can be directly used to adjust the bottom formwork elevation, reducing rework in the later stage. Moreover, the modular components are highly versatile and can be adapted to the construction of similar concrete cable-stayed bridges and continuous beam bridges, reducing the cost of repeated equipment investment and improving the overall construction efficiency of the project. Attached Figure Description

[0024] Figure 1 This is a flowchart illustrating the construction process of the side span support for a method of hoisting and precisely aligning the corbel bracket in the cast-in-place section of a continuous beam bridge, as described in this invention.

[0025] Figure 2 This is a diagram showing the elevation and cross-sectional layout of the straight section support for the construction method of hoisting and precisely aligning the corbel bracket of the cast-in-place section of a continuous beam bridge according to the present invention.

[0026] Figure 3 This is a longitudinal elevation view of the side span support of the construction method for hoisting and precisely aligning the corbel bracket of the cast-in-place section of a continuous beam bridge according to the present invention.

[0027] Figure 4 This is a plan view of the straight section support for the construction method of hoisting and precisely aligning the corbel bracket of the cast-in-place section of a continuous beam bridge according to the present invention.

[0028] Figure 5 This is a top view of the side span support of the construction method for hoisting and precisely aligning the corbel bracket of the cast-in-place section of a continuous beam bridge according to the present invention. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] Example

[0033] Please see Figures 1-5 As shown, the present invention provides a technical solution: a method for hoisting and precisely aligning the corbel bracket of a cast-in-place section of a continuous beam bridge, comprising the following steps:

[0034] S1: The support structure design adopts a triangular bracket as the load-bearing system. The bracket diagonal rod is made of double-channel steel, and the longitudinal rod is made of double-channel steel. It is connected to the pier body through climbing cones. The climbing cones are pre-embedded during the pier construction and fixed with 16mm thick positioning plates. The positioning plates are spot-welded to the main reinforcement on the outside of the pier body, and the two opposite climbing cones are positioned by laying out lines and fixed with the help of steel bars.

[0035] S2: Lifting preparation: The bracket is processed in parts at the factory. After processing, it is transported to the site for pre-assembly. After the pre-assembly is qualified, it is lifted into place by a 25t truck crane. It is connected to the embedded parts of the pier body through φ80 and φ100 pins. After connection, safety pins are inserted to fix it.

[0036] S3: Precise alignment is achieved by using a total station in conjunction with an auxiliary disc with a central prism groove to check the installation coordinates of the bracket, ensuring that the plane position deviation is ≤±5mm; the bracket elevation is adjusted by using a cup-buckle bracket top support, first by coarse adjustment using suspension cables, and then by fine adjustment using adjusting bolts, controlling the elevation deviation to ≤2mm; the gap between the bracket and the pier body is filled with thin steel plates and welded for fixation.

[0037] S4: Acceptance and preloading. After the support is installed, it is inspected. After the acceptance is qualified, it is preloaded in stages according to 60%, 100% and 110% of the construction load. During the preloading process, the settlement value is monitored. When the difference between the last two settlements is ≤2mm, the support is judged to be stable. The bottom formwork elevation is adjusted according to the preloading data.

[0038] In this embodiment, a stable load-bearing system is formed by a triangular bracket structure (double-channel steel diagonal brace + double-channel steel longitudinal brace). The load is transferred by connecting the climbing cone to the pier body. The climbing cone is fixed to the outer main reinforcement of the pier body by spot welding with a 16mm thick positioning plate. At the same time, the precise position of the climbing cone is ensured by setting out the positioning line and fixing with steel reinforcement. This achieves a reliable connection between the bracket and the pier body, avoids the risk of loosening of the anchorage of traditional supports, provides a stable load-bearing foundation for the subsequent cast-in-place construction of continuous beam bridges, and ensures construction safety.

[0039] In this embodiment, specifically: in step S1, the climbing cone positioning plate opens a positioning hole according to the size of the climbing cone cone barrel, the climbing cone is fixed in the positioning hole, and after the positioning plate is spot welded to the main reinforcement on the outer side of the pier body, the elevation and angle of the climbing cone are checked multiple times.

[0040] The climbing cone positioning plate has customized positioning holes according to the size of the climbing cone's conical barrel. After the climbing cone is fixed in the hole, it is spot welded to the main reinforcement of the pier body. By repeatedly checking the elevation and angle of the climbing cone, the positional deviation during the pre-embedding process is eliminated, ensuring the accuracy of the climbing cone's pre-embedding position, avoiding misalignment of the bracket due to the climbing cone's offset, reducing the workload of later adjustments, and improving the fit between the bracket and the pier body.

[0041] In this embodiment, specifically: in step S2, when the bracket is processed into parts at the factory, the splicing weld of the double-channel steel is inspected to ensure that there are no defects such as undercut, cracks, arc craters, or slag inclusions; during on-site pre-assembly, the fit of the connection nodes of each component of the bracket is checked, and adjustments are made in a timely manner if the deviation exceeds the limit.

[0042] It should be noted that during the factory's component processing, the quality of the weld seams of the double-channel steel splices is inspected to eliminate weld defects; during on-site pre-assembly, the fit of the connection nodes of each component is checked, and deviations are adjusted in a timely manner to ensure the overall structural integrity of the bracket, thereby improving the structural strength and stability of the bracket, reducing on-site welding hazards, avoiding uneven stress caused by poor component fit, and reducing the risk of bracket deformation during construction.

[0043] In this embodiment, specifically: in step S2, when the 25t truck crane lifts the bracket, a double-point lifting method is adopted, with the lifting points set at the connection between the longitudinal and diagonal rods of the bracket.

[0044] It should also be understood that the 25t truck crane uses a double lifting point (the connection between the longitudinal and diagonal rods) for lifting. The lifting posture is controlled by a dedicated person to avoid collision between the bracket and the pier, so as to balance the lifting force on the bracket, prevent the bracket from deforming, ensure the safety of the lifting process, avoid damage to the pier and bracket due to collision, and improve the lifting efficiency.

[0045] In this embodiment, specifically: in step S3, when the total station checks the installation coordinates of the bracket, one monitoring point is set at the end of each of the longitudinal and diagonal rods of the bracket, and each monitoring point is measured at least 3 times, and the average value is taken as the final coordinate value.

[0046] The total station, in conjunction with an auxiliary disk with a vertical prism groove, sets monitoring points at the ends of the longitudinal and diagonal members of the bracket. Each point is measured at least three times and the average value is taken to verify the installation coordinates. This ensures that the deviation of the bracket's plane position is ≤±5mm, guaranteeing that the bracket's installation coordinates meet the design requirements and laying the foundation for the alignment accuracy of subsequent continuous beam bridge construction.

[0047] In this embodiment, specifically: in step S3, when adjusting the elevation of the bracket top support of the bowl buckle bracket, the adjustment amount of the top support shall not exceed 5mm each time. After adjustment, a spirit level shall be used to check the levelness of the top surface of the bracket to ensure that the levelness deviation is ≤1mm / m.

[0048] It should be noted that the top support of the cup-buckle bracket should be adjusted by ≤5mm each time. After adjustment, the level of the top surface should be checked with a spirit level. The elevation should be controlled by a combination of "coarse adjustment (suspension cable) + fine adjustment (adjusting bolt)" to achieve an elevation deviation of ≤2mm and ensure that the level deviation of the top surface of the bracket is ≤1mm / m. This will prevent uneven concrete pouring thickness in continuous beam bridges due to elevation deviation.

[0049] In this embodiment, specifically: in step S3, when the thin steel plate fills the gap between the bracket and the pier, the thickness of the thin steel plate is selected according to the size of the gap, and the welding length between the thin steel plate and the bracket and the pier is not less than 50mm, and the weld height is not less than 6mm.

[0050] It should also be understood that, based on the size of the gap between the bracket and the pier, a thin steel plate of appropriate thickness is selected, and after filling the gap, it is welded and fixed to ensure that the weld length is ≥50mm and the weld height is ≥6mm. This eliminates the gap between the bracket and the pier, achieves uniform force transmission, avoids local stress concentration that could lead to damage to the bracket or pier structure, and improves the overall load-bearing stability.

[0051] In this embodiment, specifically: in step S4, during preloading, concrete blocks are used as the loading weights. The concrete blocks are stacked on the bracket according to the principle of uniform distribution, and after each loading is completed, the load is left to stand still for 1 hour before settlement monitoring is carried out.

[0052] The concrete blocks were stacked evenly and loaded in stages according to the construction load of 60%, 100%, and 110%. After each loading stage, the load was allowed to stand still for 1 hour before monitoring the settlement. By simulating the actual construction load, the bearing capacity of the support was gradually tested to avoid sudden deformation of the support due to concentrated loading. At the same time, the static stop allowed the support to deform fully, improving the accuracy of the preloading data.

[0053] In this embodiment, specifically: in step S4, a high-precision level is used for preloading settlement monitoring. The monitoring frequency is once after each loading stage, once every two hours after loading is completed, until the settlement difference between the last two times is ≤2mm.

[0054] It should also be understood that the high-precision level instrument monitors settlement at a frequency of "once after each loading stage and once every 2 hours after loading is completed". The stability judgment standard is that the difference between the last two settlements is ≤2mm. In this way, the settlement pattern of the support can be accurately captured, the elastic deformation and inelastic deformation can be accurately distinguished, and data support can be provided for the adjustment of the bottom formwork elevation. This avoids the deviation of the line shape caused by the settlement of the support after the continuous beam bridge is poured.

[0055] In this embodiment, specifically: after the bracket is installed, it is also necessary to check the tightening torque of the bolts connecting the bracket and the pier body.

[0056] In this embodiment, after the bracket is installed, a torque testing tool is used to check the tightening torque of the connecting bolts to ensure that the torque value meets the design requirements. This avoids the bolts from loosening due to insufficient torque, ensuring the reliability of the connection between the bracket and the pier body, preventing the bracket from becoming unstable due to loose bolts during construction, and further improving the construction safety factor.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0059] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A method for hoisting and precisely aligning corbel brackets in cast-in-place sections of continuous beam bridges, characterized in that: Includes the following steps: S1: The support structure design adopts a triangular bracket as the load-bearing system. The bracket diagonal rod is made of double-channel steel, and the longitudinal rod is made of double-channel steel. It is connected to the pier body through climbing cones. The climbing cones are pre-embedded during the pier construction and fixed with 16mm thick positioning plates. The positioning plates are spot-welded to the main reinforcement on the outside of the pier body, and the two opposite climbing cones are positioned by laying out lines and fixed with the help of steel bars. S2: Lifting preparation: The bracket is processed in parts at the factory. After processing, it is transported to the site for pre-assembly. After the pre-assembly is qualified, it is lifted into place by a 25t truck crane. It is connected to the embedded parts of the pier body through φ80 and φ100 pins. After connection, safety pins are inserted to fix it. S3: Precise alignment. Use a total station with an auxiliary disc featuring a central prism groove to check the bracket installation coordinates, ensuring a planar position deviation of ≤±5mm. Use a cup-buckle bracket to adjust the bracket elevation. First, use suspension cables for coarse adjustment, then use adjusting bolts for fine adjustment, controlling the elevation deviation to ≤2mm. The gap between the bracket and the pier body is filled with thin steel plates and welded in place; S4: Acceptance and preloading. After the support is installed, it is inspected. After the acceptance is qualified, it is preloaded in stages according to 60%, 100% and 110% of the construction load. During the preloading process, the settlement value is monitored. When the difference between the last two settlements is ≤2mm, the support is judged to be stable. The bottom formwork elevation is adjusted according to the preloading data.

2. The continuous beam bridge cast-in-place section corbel bracket hoisting and precise positioning construction method according to claim 1, characterized in that: In step S1, the climbing cone positioning plate is made with positioning holes according to the size of the climbing cone cone barrel. The climbing cone is fixed in the positioning holes. After the positioning plate is spot welded to the main reinforcement on the outside of the pier, the elevation and angle of the climbing cone are checked multiple times.

3. The method for hoisting and precisely aligning the corbel bracket of the cast-in-place section of a continuous beam bridge according to claim 1, characterized in that: In step S2, when the bracket is processed into parts at the factory, the splicing welds of the double-channel steel are inspected to ensure that there are no defects such as undercut, cracks, arc craters, or slag inclusions. During on-site pre-assembly, the fit of the connection nodes of each component of the bracket is checked, and adjustments are made in a timely manner if the deviation exceeds the limit.

4. The method for hoisting and precisely aligning the corbel bracket of a cast-in-place section of a continuous beam bridge according to claim 1, characterized in that: In step S2, when the 25t truck crane lifts the bracket, a double-lifting-point lifting method is adopted, with the lifting points set at the connection between the longitudinal and diagonal braces of the bracket.

5. The method for hoisting and precisely aligning the corbel bracket of a cast-in-place section of a continuous beam bridge according to claim 1, characterized in that: In step S3, when the total station is used to check the installation coordinates of the bracket, one monitoring point is set at the end of the longitudinal and diagonal rods of the bracket. Each monitoring point is measured at least 3 times, and the average value is taken as the final coordinate value.

6. The method for hoisting and precisely aligning the corbel bracket of the cast-in-place section of a continuous beam bridge according to claim 1, characterized in that: In step S3, when adjusting the elevation of the bracket top support of the bowl buckle bracket, the adjustment amount of the top support shall not exceed 5mm each time. After adjustment, use a spirit level to check the levelness of the top surface of the bracket to ensure that the levelness deviation is ≤1mm / m.

7. The method for hoisting and precisely aligning the corbel bracket of a cast-in-place section of a continuous beam bridge according to claim 1, characterized in that: In step S3, when the thin steel plate fills the gap between the bracket and the pier, the thickness of the thin steel plate is selected according to the size of the gap, and the welding length between the thin steel plate and the bracket and the pier is not less than 50mm, and the weld height is not less than 6mm.

8. The method for hoisting and precisely aligning the corbel bracket of a cast-in-place section of a continuous beam bridge according to claim 1, characterized in that: In step S4, during preloading, concrete blocks are used as the loading weights. The concrete blocks are stacked on the bracket according to the principle of uniform distribution, and after each loading is completed, the load is left to stand still for 1 hour before settlement monitoring is carried out.

9. The method for hoisting and precisely aligning the corbel bracket of the cast-in-place section of a continuous beam bridge according to claim 1, characterized in that: In step S4, a high-precision level instrument is used to monitor preloading settlement. The monitoring frequency is once after each loading stage and once every two hours after loading is completed, until the settlement difference between the last two monitoring sessions is ≤2mm.

10. A method for hoisting and precisely aligning a corbel bracket in a cast-in-place section of a continuous beam bridge according to claims 1-9, characterized in that: After the bracket is installed, the tightening torque of the bolts connecting the bracket and the pier body must be checked.

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