Steel structure lifting support connecting point reinforcing device

Abstract

The utility model discloses a steel structure promotes support connecting point reinforcing device, through the connecting point of the beam of promoting support, vertical support and oblique support increases 20mm thick reinforcing steel sheet, effectively controls the stress deformation of support, promotes the shearing force and the bending capacity of connecting point to strengthen the stability of whole support system. Meanwhile, this local strengthening scheme avoids the steel consumption problem brought by the stability promotion of traditional design through the extension of oblique force arm, realizes the effective saving of steel and the reasonable control of engineering cost, satisfies the comprehensive requirement of modern building engineering to safety, economy and sustainability. The application has remarkable advantages in the structural safety of promoting support, stress performance, cost control and construction convenience etc. These advantages are from the technical route of connecting point local strengthening innovatively adopted in the application, realizes the double promotion of structural performance and economic benefit through accurate mechanical analysis and optimization design.

Description

Technical Field

[0001] This utility model relates to the field of building steel structure lifting support technology, specifically to a reinforcing device for the connection points of lifting support beams, vertical supports, and diagonal supports. By adding steel of a specific thickness at key stress-bearing connection points, it achieves the goals of optimizing support stress, controlling deformation, and saving steel. It is particularly suitable for large-scale steel structure lifting projects, building structure installation, and mechanical equipment hoisting. Background Technology

[0002] In large-scale steel structure lifting projects, the lifting support, as a key structure for bearing and transmitting loads, directly affects the success or failure of the entire project. Traditional lifting support designs primarily improve structural stability by extending the diagonal support arm, thereby preventing deformation or instability caused by excessive loads during lifting. However, this design method has significant drawbacks.

[0003] First, while extending the diagonal lever arm can improve the structure's bending and shear resistance, this practice inevitably leads to a significant increase in steel consumption. Extending the lever arm not only increases the overall weight of the support structure but also requires a corresponding increase in the amount of supporting materials, resulting in a substantial rise in project costs. In the current context of advocating resource conservation and green construction, this extensive design approach no longer meets the requirements of sustainable development.

[0004] Secondly, the connection points of the beams, vertical supports, and diagonal supports of the lifting scaffold are usually the most stress-concentrated parts of the entire structure. During the lifting process, these connection points bear the combined stress from multiple directions. Traditional designs often fail to adequately address the local reinforcement of these connection points, relying solely on the overall structural rigidity to ensure stability, making these connection points the weakest links in the entire scaffold system. When the load reaches a certain level, stress concentration easily occurs at the connection points, leading to localized deformation or even failure, threatening construction safety.

[0005] Furthermore, existing technologies have shortcomings in the stress analysis and optimization design of lifting supports. Many engineering projects lack in-depth research on the stress characteristics of connection points during the design phase, failing to find more reasonable and economical optimization solutions based on mechanical principles. How to reduce steel usage and lower engineering costs through targeted local reinforcement measures while ensuring structural safety and stability has become an important issue that urgently needs to be addressed in the field of lifting support design. Utility Model Content

[0006] Therefore, this utility model aims to solve the problems of high steel consumption, concentrated stress at connection points, and insufficient structural optimization in traditional lifting support designs. This utility model provides a strengthening device for the connection points of a steel structure lifting support. By adding 20mm thick reinforcing steel plates to the connection points of the beams, vertical supports, and diagonal supports of the lifting support, the stress deformation of the support is effectively controlled, and the shear and bending resistance of the connection points is improved, thereby enhancing the stability of the entire support system. At the same time, this localized strengthening scheme avoids the problem of excessive steel consumption caused by extending the diagonal lever arm to improve stability in traditional designs, achieving effective steel saving and reasonable control of engineering costs, and meeting the comprehensive requirements of modern construction engineering for safety, economy, and sustainability.

[0007] This utility model is implemented as follows: a steel structure lifting support connection point reinforcement device is constructed, characterized in that: the device includes a lifting jack, a lifting support beam, a corbel, an inclined support arm, and a vertical support arm; the lifting jack is installed on the upper part of the support beam to achieve lifting control of the structure being lifted; the lifting support beam is the main load-bearing component, bearing the lifting force from the lifting jack and transmitting it to the vertical and inclined support arms; the vertical support arm is arranged in the vertical direction and mainly bears axial pressure; the inclined support arm and the vertical support arm form a stable triangular support system, enhancing the structure's anti-overturning ability; the inclined support arm and the vertical support arm are respectively fixedly connected to the corbel, which serves as a connecting component between the support and the main building structure, ensuring the stable fixation of the entire lifting system.

[0008] According to the present invention, a steel structure lifting support connection point reinforcement device is characterized in that: a reinforcing plate A is provided at the connection point between the lifting support beam and the vertical support arm, and reinforcing plates B and D are provided between the vertical support arm and the corbel to enhance the stress performance of the connection point; a reinforcing plate C is provided at the connection point between the lifting support beam and the inclined support arm, and a reinforcing plate E is provided between the inclined support arm and the corbel to form all-round reinforcement of the inclined support connection part; all reinforcing steel plates are made of high-quality structural steel with a thickness of 20mm and are firmly connected to the lifting support beam, the vertical support arm and the inclined support arm by welding.

[0009] According to the present invention, a steel structure lifting support connection point reinforcement device is characterized in that: Reinforcing plate A is disposed on the left side of the connection point between the lifting support beam and the vertical support arm, its plane being perpendicular to the axis of the vertical support arm, forming a stable welded connection with the web of the support beam and the outer side of the vertical support arm; Reinforcing plate B is disposed on the right side of the connection point between the corbel and the vertical support arm, its arrangement being symmetrical with reinforcing plate A, together forming double-sided reinforcement of the vertical support connection point; Reinforcing plate C is disposed at the connection point between the lifting support beam and the left-side inclined support arm, its plane forming an appropriate angle with the axis of the inclined support arm, effectively bearing the thrust from the inclined support and enhancing the shear resistance of the connection point; Reinforcing plate D is disposed at the intersection of the vertical support arm and the corbel, serving to strengthen the stiffness of the web of the support beam and prevent local buckling under concentrated loads; Reinforcing plate E is disposed at the connection point between the inclined support arm and the corbel, its arrangement being symmetrical with reinforcing plate C, ensuring balanced force on both sides of the support.

[0010] According to the present invention, a steel structure lifting support connection point reinforcement device is characterized in that: all reinforcing steel plates are connected to the main support components by full penetration welds, and the weld quality grade is not lower than level two. Before welding, the welding area should be derusted and cleaned to ensure welding quality. A multi-layer, multi-pass welding process is used to reduce residual welding stress and prevent welding deformation. After welding, the weld should be inspected by ultrasonic or magnetic particle testing to ensure that the internal quality of the weld meets design requirements. Welds at important nodes should be double-sided welded to improve the reliability and durability of the connection.

[0011] This utility model has the following advantages: It provides a strengthening device for the connection points of a steel structure lifting support. By adding 20mm thick reinforcing steel plates to the connection points of the beams, vertical supports, and diagonal supports of the lifting support, the stress deformation of the support is effectively controlled, and the shear and bending resistance of the connection points is improved, thereby enhancing the stability of the entire support system. Simultaneously, this local strengthening scheme avoids the problem of excessive steel consumption caused by extending the diagonal lever arm to improve stability in traditional designs, achieving effective steel saving and reasonable control of engineering costs, meeting the comprehensive requirements of modern construction engineering for safety, economy, and sustainability. This application has significant advantages in terms of structural safety, stress performance, cost control, and construction convenience of the lifting support. These advantages stem from the innovative use of a local strengthening technique at the connection points, achieving a dual improvement in structural performance and economic benefits through precise mechanical analysis and optimized design. Attached Figure Description

[0012] Figure 1 This is a structural diagram of the device implemented in this application.

[0013] Among them: 1 lifting jack, 2 lifting support beam, 3 reinforcing plate A, 4 reinforcing plate B, 5 reinforcing plate C, 6 reinforcing plate D, 7 reinforcing plate E, 8 bracket, 9 diagonal support arm, 10 vertical support arm. Detailed Implementation

[0014] The following will be combined with the appendix Figure 1 This utility model will be described in detail, and the technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0015] This utility model provides a steel structure lifting support connection point reinforcement device, which is particularly suitable for large-scale steel structure lifting projects where the stability and safety requirements of the support are high. This device significantly optimizes the stress performance of the lifting support by adding reinforcing steel plates at key connection points. A detailed implementation description is provided below with reference to the accompanying drawings. I. Structure and Technical Features of the Device: (1) Basic support structure: The lifting support system mainly consists of basic components such as lifting jacks (1), lifting support beams (2), vertical support arms (10), inclined support arms (9), and brackets (8). The lifting jacks are installed on the upper part of the support beam to control the upward movement of the structure being lifted. The support beam is the main load-bearing component, bearing the lifting force from the jacks and transmitting it to the vertical and inclined supports. The vertical support arms are set vertically and mainly bear axial pressure. The inclined support arms and vertical support arms form a stable triangular support system, enhancing the structure's resistance to overturning. The brackets serve as connecting components between the support system and the main building structure, ensuring the stable fixation of the entire lifting system.

[0016] (2) Connection point reinforcement steel plate device: A reinforcing plate A3 is installed at the connection point between the lifting support beam 2 and the vertical support arm 10, and reinforcing plates B4 and D6 are installed between the vertical support arm 10 and the corbel 8 to enhance the load-bearing capacity of this connection node. A reinforcing plate C5 is installed at the connection point between the lifting support beam 2 and the inclined support arm 9, and a reinforcing plate E7 is installed between the inclined support arm 9 and the corbel 8, forming a comprehensive reinforcement of the inclined support connection. All reinforcing steel plates are made of high-quality structural steel with a thickness of 20mm and are firmly connected to the lifting support beam, vertical support arm, and inclined support arm by welding. The placement of the reinforcing steel plates is based on precise mechanical calculations to ensure that they can effectively disperse stress concentration at the connection point and improve the shear and bending bearing capacity of the node.

[0017] (3) Specific arrangement of the reinforcing steel plates: Reinforcing plate A3 is positioned to the left of the connection point between the lifting support beam 2 and the vertical support arm 10. Its plane is perpendicular to the axis of the vertical support arm, forming a stable welded connection with the web of the support beam and the outer surface of the vertical support arm 10. Reinforcing plate B4 is positioned to the right of the connection point between the corbel 8 and the vertical support arm 10, arranged symmetrically with reinforcing plate A3, together providing double-sided reinforcement to the vertical support connection node. Reinforcing plate C5 is positioned at the connection point between the lifting support beam 2 and the left-side inclined support arm 9. Its plane forms an appropriate angle with the axis of the inclined support arm 9, effectively bearing the thrust from the inclined support and enhancing the shear resistance of the connection point. Reinforcing plate D6 is positioned at the intersection of the vertical support arm 10 and the corbel 8, reinforcing the stiffness of the web of the support beam and preventing local buckling under concentrated loads. Reinforcing plate E7 is positioned at the connection point between the inclined support arm 9 and the corbel 8, arranged symmetrically with reinforcing plate C5, ensuring balanced force distribution on both sides of the support.

[0018] (4) Technical requirements for welding connections: All reinforcing steel plates are connected to the main support structure using full-penetration welds, with a weld quality grade of no less than Class II. Before welding, the welding areas should be derusted and cleaned to ensure weld quality. Multi-layer, multi-pass welding processes should be used to reduce residual stress and prevent welding deformation. After welding, the welds should be inspected using ultrasonic or magnetic particle testing to ensure the internal quality meets design requirements. Welds at critical nodes should be double-sided to improve the reliability and durability of the connection.

[0019] II. Working principle and force analysis of the device: (1) Basic working principle: The working principle of this device is based on the theory of local reinforcement in structural mechanics. During the operation of the lifting support, the lifting force generated by the lifting jacks is transmitted through the support beam to the vertical and inclined support arms, and finally to the main building structure. In this force transmission path, the connection points between the support beam and the vertical and inclined support arms are subjected to complex stress states, including the combined effects of axial force, shear force, and bending moment. By adding 20mm thick reinforcing steel plates at these critical connection points, the effective cross-sectional area of ​​the connection nodes can be significantly increased, improving the shear and bending stiffness of the nodes, thereby improving the overall load-bearing performance of the support.

[0020] (2) Stress optimization mechanism: In traditional supports without reinforcing steel plates, stress at connection points is often highly concentrated, posing significant safety hazards. Adding reinforcing steel plates significantly improves the stiffness of the connection points and results in a more uniform stress distribution. Finite element analysis shows that reinforcing steel plates effectively disperse concentrated stress over a larger area, reducing the maximum stress at the connection points. Simultaneously, reinforcing steel plates increase the shear area of ​​the joints, improving their shear capacity and making the connection more reliable. Furthermore, reinforcing steel plates can restrain local deformation of the support beam web, preventing buckling instability under compressive stress and further enhancing the overall stability of the support system.

[0021] (3) Deformation control effect: Practical engineering applications show that using this device significantly reduces angular deformation at connection points, ensuring the geometric stability of the support during lifting. This excellent deformation control not only improves the safety of lifting operations but also reduces inconsistencies between the lifting equipment and the structure caused by support deformation, thus lowering the workload for construction adjustments.

[0022] 3. Installation methods and key points of the device: Step 1: Installation of the main support structure According to the construction drawings, complete the on-site assembly of the main components, including the lifting support beam, vertical support arm, and diagonal support arm. Ensure that the geometric dimensions of each component meet the design requirements and that the connecting holes are accurately aligned. Use high-strength bolts for initial connection, but do not tighten them completely yet, leaving room for adjustment during the subsequent installation of reinforcing steel plates. Check the verticality and horizontality of the support to ensure that the overall installation accuracy meets the specifications.

[0023] Step 2: Strengthen the installation and positioning of the steel plate Based on the locations of the reinforcing steel plates indicated on the design drawings, accurately lay out the corresponding positions on the support beams and support arms. Use a template or laser positioning instrument to determine the accurate position and angle of the reinforcing steel plates. Temporarily fix the reinforcing steel plates in the predetermined positions using tack welding for initial fixation. The tack welds should be evenly distributed to ensure that the reinforcing steel plates do not shift or deflect before formal welding.

[0024] Step 3: Welding Construction After completing the locating welding of the reinforcing steel plates, the formal welding operation can begin. Preheating of the welding area is necessary before welding; the preheating temperature should be determined based on the material and ambient temperature. A multi-layer, multi-pass welding process should be adopted, with the thickness of each layer controlled within the specified requirements. The welding sequence should follow the principle of welding welds with larger shrinkage first, followed by welds with smaller shrinkage, to reduce welding deformation. During welding, welding parameters, including welding current, voltage, and welding speed, should be strictly controlled to ensure weld quality. After welding, slag should be removed immediately, and the weld should be visually inspected; any defects should be repaired promptly.

[0025] Step 4: Welding quality inspection After welding is completed, non-destructive testing (NDT) should be performed on the weld in accordance with relevant specifications. The main testing methods include ultrasonic testing and magnetic particle testing. Ultrasonic testing is used to detect internal weld defects such as porosity, slag inclusions, and cracks. Magnetic particle testing is used to detect surface and near-surface defects in the weld. The testing ratio should be no less than 20% of the total weld length, and important nodes should be 100% tested. For any non-conforming welds found during testing, the cause should be identified, a repair plan should be developed, and the welds should be retested until they pass the test.

[0026] Step 5: Overall adjustment of the bracket After all reinforcing steel plates are installed and pass quality inspection, the overall debugging of the support system is carried out. First, the geometric dimensions of the support system are checked to ensure that its verticality, horizontality, and the relative positions of all components meet the design requirements. Then, all high-strength bolts are finally tightened to the specified preload. A no-load test run is conducted to check the working condition of the lifting jacks and the stability of the support system. Finally, a static load test is performed, applying a test load equivalent to 1.25 times the design load for a duration of no less than 30 minutes to check the deformation of the support system and the working condition of the connection points. During the test, strain tests should be performed on key components to verify the consistency between the actual stress distribution and the design calculations.

[0027] Compared with existing technologies, this application has significant advantages in improving the structural safety, load-bearing performance, cost control, and ease of construction of the support structure. These advantages stem from the innovative use of a localized reinforcement technique at the connection points, which, through precise mechanical analysis and optimized design, achieves a dual improvement in structural performance and economic benefits.

[0028] Performance improvement (1) Significantly improves the load-bearing capacity of connection points In traditional lifting support designs, connection points are often the weakest links in the entire structure. Under concentrated loads, stress concentration easily occurs at these points, leading to localized plastic deformation or even failure. This invention increases the effective cross-sectional area and shear resistance of the connection node by adding a 20mm thick reinforcing steel plate at the connection point. Finite element analysis and actual engineering test data show that the ultimate bearing capacity of the connection point is improved after adding the reinforcing steel plate. This increased bearing capacity gives the support a stronger resistance to overloads or sudden loads, significantly reducing the risk of structural failure and improving construction safety.

[0029] (2) Effective control of structural deformation During operation, lifting supports inevitably undergo elastic deformation. Excessive deformation not only affects lifting accuracy but may also cause geometric nonlinear effects in the structure, further reducing the stability of the support. This invention significantly improves the stiffness of the connection points and reduces rotational deformation of the nodes by adding reinforcing steel plates. Actual measurement data shows that this device effectively maintains the geometric stability of the support. This excellent deformation control performance ensures the accuracy and smoothness of lifting operations and reduces construction adjustments caused by deformation.

[0030] (3) Improve stress distribution Stress concentration is one of the main causes of fatigue failure and brittle fracture in steel structures. In traditional designs, the stress concentration factor at connection points is often high. This invention optimizes the stress transmission path and significantly reduces stress peaks by adding reinforcing steel plates. The more uniform stress distribution not only improves the static load-bearing capacity of the structure but also significantly improves its fatigue resistance and extends the service life of the support structure.

[0031] (4) Enhance overall stability Improving the overall stability of a support system depends not only on the load-bearing capacity of each component but also on the reliability of the connections between them. Weak connections can lead to excessive lateral displacement and overall instability. This invention improves the torsional stiffness and lateral stiffness of the nodes by strengthening key connection points.

[0032] Cost reduction (1) Significantly reduce the total amount of steel used Traditional lifting support designs typically extend the diagonal support arm to improve stability. While effective, this method significantly increases the length of the diagonal support members, leading to a substantial increase in steel consumption. For example, in a typical project, the traditional design required a 12-meter diagonal support arm. However, by using this invention, the length can be shortened to 9 meters by adding reinforcing steel plates at the connection points to improve node stiffness, reducing steel consumption by approximately 25%. Although the amount of reinforcing steel plates increases, it only accounts for 15%-20% of the reduction in steel consumption for the diagonal support. Overall, using this invention reduces the total steel consumption of the entire support system by 10%-15%, equivalent to a saving of 200-400 kg of steel per lifting support. For large-scale projects, this saving is considerable.

[0033] (2) Reduce manufacturing and transportation costs The reduction in steel usage directly lowers material costs, leading to lower manufacturing and transportation costs. Shorter diagonal support members are easier to manufacture, reducing workload in processes such as material preparation, welding, and surface treatment. Simultaneously, shorter components result in higher loading efficiency and better transportation convenience, effectively reducing logistics costs. Furthermore, the lighter weight of the support reduces the difficulty of on-site hoisting, decreasing the tonnage requirements of hoisting equipment and further saving construction costs. Overall, calculations show that adopting this invention can reduce the manufacturing and transportation costs of lifting supports by 8%-12%.

[0034] (3) Shorten the construction period The reinforcing steel plate installation process employed in this invention is simple and convenient for construction. The reinforcing steel plate utilizes standardized design and prefabrication, requiring only positioning welding on-site. Compared to traditional lengthening rod solutions, this significantly reduces on-site assembly and adjustment work. Practical engineering experience shows that using this invention can shorten the on-site installation time of a single lifting bracket by 15%-20%, effectively accelerating project progress and reducing labor costs and machinery usage fees.

[0035] (4) Improve economic efficiency Considering the cost savings from all aspects mentioned above, this invention can bring significant economic benefits to engineering projects. Taking a medium-sized lifting project as an example, 8-12 lifting supports are typically required. Using this invention, each support can save approximately 5,000-8,000 yuan in overall costs, resulting in cost savings of 40,000-100,000 yuan for the entire project. For large and complex projects, the cost savings are even more pronounced. This invention improves structural performance while reducing costs, achieving a harmonious balance between safety and economy.

[0036] How key technical solutions can produce good technical results (1) Accurately identify key stress-bearing parts The core technological advantage of this invention lies in its ability to accurately identify the most critical connection points in the lifting support through systematic mechanical analysis, and then employ targeted reinforcement measures. Traditional designs often use a "one-size-fits-all" reinforcement approach, applying uniform reinforcement measures to all parts, resulting in material waste. This invention, through finite element analysis and theoretical calculations, identifies the connection points between the support beam and the vertical and diagonal support arms as the areas of highest stress concentration. By adding reinforcing steel plates to these critical locations, the maximum reinforcement effect is achieved with minimal material input, embodying the concept of optimized design.

[0037] (2) Determine the thickness of the reinforcing steel plate appropriately The selection of the thickness of the reinforcing steel plate is another key technical parameter of this invention. Through extensive calculations, analysis, and engineering practice, it was determined that a 20mm thick reinforcing steel plate achieves the optimal cost-effectiveness while meeting strength and stiffness requirements. If the reinforcing steel plate is too thin (e.g., 10mm), although material is saved, the strengthening effect is not significant, and the improvement in the load-bearing capacity and stiffness of the connection point is limited. If the reinforcing steel plate is too thick (e.g., 30mm), although it can further improve the joint performance, the material consumption increases excessively, reducing economic efficiency, and the excessively thick steel plate also makes welding difficult. A thickness of 20mm strikes a perfect balance between performance and cost, achieving the optimal match between technical performance and economic benefits.

[0038] (3) Optimize the arrangement of reinforcing steel plates This invention optimizes the arrangement of reinforcing steel plates based on the stress characteristics of different connection points. For vertical support connection points, reinforcing plates A3 and B4 are arranged symmetrically on both sides, forming a 'clamping' effect on the node and effectively improving its shear resistance. For diagonal support connection points, a combination of multiple reinforcing plates C5, D6, and E7 is used, which strengthens the connection between the diagonal support and the support beam, enhances the rigidity of the support beam itself, and forms a complete stress transfer system. This site-specific arrangement fully considers the specific stress state of each connection point, making the reinforcement measures more reasonable and effective, and avoiding material waste caused by blind reinforcement.

[0039] (4) Adopt a reliable connection method The reinforcing steel plate is connected to the main support structure using a full-penetration weld, ensuring the reliability of the connection. The full-penetration weld fully utilizes the strength of both the base material and the weld metal, ensuring that the load-bearing capacity of the connection is no less than that of the base material itself. Simultaneously, the use of a multi-layer, multi-pass welding process effectively controls residual welding stress and deformation, guaranteeing weld quality. This reliable connection method allows the reinforcing steel plate to truly form an integral part of the main structure, sharing the load and maximizing the strengthening effect. While bolted or fillet weld connections are convenient for construction, they significantly reduce connection stiffness and load-bearing capacity, failing to achieve the desired strengthening effect.

[0040] (5) Consider construction feasibility This invention fully considers the feasibility and convenience of construction during its design process. The dimensions and shape of the reinforcing steel plate are rationally designed, facilitating processing, manufacturing, and on-site installation. Welding is easy to perform at the welded areas, allowing welders to operate conveniently and ensuring weld quality. The entire installation process requires no special equipment; ordinary welding equipment suffices. This design philosophy, emphasizing construction feasibility, enables the invention to be implemented quickly and easily in practical engineering projects, avoiding theoretically advanced but practically difficult-to-operate technical solutions, thus ensuring the practicality and widespread applicability of the technology.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steel structure lifting support connection point reinforcement device, characterized in that... ； The device includes a lifting jack (1), a lifting support beam (2), a corbel (8), an inclined support arm (9), and a vertical support arm (10). The lifting jack (1) is installed on the upper part of the support beam (2) to control the lifting of the structure. The lifting support beam (2) is the main load-bearing component, bearing the lifting force from the lifting jack (1) and transmitting it to the vertical support arm (10) and the inclined support arm (9). The vertical support arm (10) is set in the vertical direction and mainly bears the axial pressure. The inclined support arm (9) and the vertical support arm (10) form a stable triangular support system to enhance the overturning resistance of the structure. The inclined support arm (9) and the vertical support arm (10) are fixedly connected to the corbel (8), which serves as a connecting component between the support and the main building structure to ensure the stability and fixation of the entire lifting system.

2. The steel structure lifting support connection point reinforcement device according to claim 1, characterized in that; A reinforcing plate A (3) is installed at the connection point between the lifting support beam (2) and the vertical support arm (10), and a reinforcing plate B (4) and a reinforcing plate D (6) are installed between the vertical support arm (10) and the corbel (8) to enhance the load-bearing performance of the connection point; a reinforcing plate C (5) is installed at the connection point between the lifting support beam (2) and the inclined support arm (9), and a reinforcing plate E (7) is installed between the inclined support arm (9) and the corbel (8) to form all-round reinforcement of the inclined support connection part; all reinforcing steel plates are made of high-quality structural steel with a thickness of 20mm and are firmly connected to the lifting support beam, the vertical support arm and the inclined support arm by welding.

3. The steel structure lifting support connection point reinforcement device according to claim 1, characterized in that; Reinforcing plate A (3) is located on the left side of the connection point between the lifting support beam (2) and the vertical support arm (10), with its plane perpendicular to the axis of the vertical support arm, forming a stable welded connection with the web of the support beam and the outer side of the vertical support arm (10); Reinforcing plate B (4) is located on the right side of the connection point between the corbel (8) and the vertical support arm (10), with its arrangement symmetrical to that of reinforcing plate A (3), together forming double-sided reinforcement of the vertical support connection point; Reinforcing plate C (5) is located on the left side of the connection point between the lifting support beam (2) and the left inclined support arm (9). The plane of the connection point is at an appropriate angle to the axis of the inclined support arm (9), which can effectively withstand the thrust from the inclined support and enhance the shear resistance of the connection point; the reinforcing plate D (6) is set at the intersection of the vertical support arm (10) and the corbel (8), which can strengthen the stiffness of the web of the support beam and prevent local buckling under concentrated load; the reinforcing plate E (7) is set at the connection point of the inclined support arm (9) and the corbel (8), and its arrangement is symmetrical with that of the reinforcing plate C (5) to ensure that the force on both sides of the support is balanced.

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