Three-point balanced lifting construction method for L-shaped high-rise connected building steel structure

Abstract

The invention discloses a three-point balanced lifting construction method for an L-shaped high-rise connected building steel structure, which comprises the following steps: S1, assembling a steel structure on the ground, arranging a lifting system comprising three lifting points at the top of an L-shaped high-rise connected building, and respectively connecting the three lifting points with three points of the steel structure to be lifted; s2, an adjustable balance weight system is arranged, and the balance weight of the steel structure is dynamically adjusted through the adjustable balance weight system in the lifting process so as to balance the overturning moment generated by center-of-gravity shift of the steel structure; and S3, after the steel structure is lifted to the top of the L-shaped high-rise connected building and is closed with the L-shaped high-rise connected building, the adjustable counterweight system and the lifting system are sequentially withdrawn. The steel structure is lifted through the lifting system, the balance weight of the steel structure is dynamically adjusted in the lifting process through the adjustable balance weight system, the balance control problem of the overall gravity center of the steel structure in the lifting process is solved, the construction cost and the construction complexity are reduced, and the construction efficiency and safety are improved.

Description

Technical Field

[0001] This invention relates to the field of structural engineering and construction technology, and in particular to a three-point balanced lifting construction method for an L-shaped high-rise connected steel structure. Background Technology

[0002] With the innovative development of modern architectural design, irregular building structural systems are becoming increasingly common. The emergence of these non-traditional building forms makes it difficult for conventional construction methods to meet their special construction requirements, necessitating the development of innovative construction technologies.

[0003] In the field of steel structure construction for high-rise buildings, the overall lifting of the cantilever structure (i.e., steel structure) of an L-shaped building presents unique technical challenges. While the traditional four-point lifting method can ensure the balance of the lifted cantilever structure, it has significant limitations when applied to L-shaped asymmetrical buildings. The asymmetry makes it impossible to evenly distribute four lifting points at the top of the L-shaped asymmetrical building. Forcibly adding a fourth lifting point requires a massive ground-based lifting frame, which not only significantly increases construction difficulty and cost but may also damage the underground structural layers. While arranging only three lifting points at the top of the L-shaped asymmetrical building can accommodate the planar layout and structural stress characteristics, and the main structure of the L-shaped asymmetrical building can withstand the required lifting force, maintaining the balance of the overall center of gravity of the lifted cantilever structure during the lifting process is the core bottleneck restricting construction safety.

[0004] Furthermore, during the overall lifting of the cantilever structure, the temporary boundary conditions of the cantilever structure differ significantly from its final closure state, causing undesigned deformation under its own weight. The continuous accumulation of this deformation directly affects the closure accuracy and internal force distribution of the final supplementary components. To reduce structural deformation during the lifting process, traditional methods typically require a temporary tensioned beam reinforcement system below the structure to be strengthened. However, this temporary reinforcement system is only effective in structures supported on all four sides and is difficult to adapt to cantilevered structural systems. Moreover, this arrangement of temporary reinforcement systems occupies lower construction space, restricts the placement of temporary support frames and construction equipment, and actually increases construction difficulty and safety risks. Summary of the Invention

[0005] The main objective of this invention is to propose a three-point balanced lifting construction method for L-shaped high-rise connected steel structures, aiming to solve the technical problems that existing four-point lifting methods significantly increase construction difficulty and cost, and that it is difficult to control the overall center of gravity balance of the cantilever structure during the three-point lifting process.

[0006] To achieve the above objectives, the present invention proposes a three-point balanced lifting construction method for L-shaped high-rise connected steel structures, comprising: Step S1: Assemble the steel structure on the ground, and set up a lifting system with three lifting points on the top of the L-shaped high-rise connected building, so that the three lifting points are respectively connected to the three points of the steel structure to be lifted; Step S2: Set up an adjustable counterweight system. The counterweight of the steel structure is dynamically adjusted during the lifting process through the adjustable counterweight system to balance the overturning moment caused by the shift of the center of gravity of the steel structure. Step S3: After the steel structure is lifted to the top of the L-shaped high-rise connected building and joined with the L-shaped high-rise connected building, first remove the adjustable counterweight system, and then remove the lifting system.

[0007] Optionally, step S1 includes: Step S11: Set up a temporary support frame on the ground and assemble the steel structure on the temporary support frame; Step S12: Install a temporary reinforcement system at the top of the steel structure; Step S13: Install a lifting system with three lifting points on the top of the L-shaped high-rise connected building, and connect the three lifting points to three points of the steel structure to be lifted.

[0008] Optionally, the temporary reinforcement system is installed on the top of the steel structure along the straight line between the junction line of the L-shaped high-rise connected building and the far end of the cantilever.

[0009] Optionally, the steel structure includes a first cross-shaped truss and a second cross-shaped truss assembled into a cross shape, and a first connecting truss and a second connecting truss assembled into an L shape; One end of the first cross-shaped truss is connected to the connection between the first connecting truss and the second connecting truss, and the other end is connected to the corner of the L-shaped high-rise connected building. The temporary reinforcement system is set on the top of the first cross-shaped truss.

[0010] Optionally, the temporary reinforcement system includes a reinforcing mast and reinforcing stay cables. The reinforcing mast is located in the middle of the first cross-shaped truss, and the two ends of the reinforcing stay cables are respectively anchored to the two ends of the first cross-shaped truss. The middle part of the reinforcing stay cables is anchored to the top of the reinforcing mast.

[0011] Optionally, the temporary support frame is an inflatable airbag frame.

[0012] Optionally, the three lifting points are respectively located at both ends of the top surface of the L-shaped high-rise connected building and at the corner intersection; The lifting point includes a lifting frame, a through-hole jack, and a lifting cable. The lifting frame is installed on an L-shaped high-rise connected building, and the through-hole jack is set on the lifting frame. The through-hole jack is connected to the rigid frame through the lifting cable.

[0013] Optionally, the adjustable counterweight system includes a winch unit, a counterweight cable, and a counterweight assembly. The winch unit is installed on a steel structure, and the counterweight assembly is connected to the winch unit via the counterweight cable.

[0014] Optionally, temporary diagonal bracing is provided at the adjustable counterweight system of the steel structure suspension.

[0015] Optionally, the adjustable counterweight system further includes an angle sensor, a stress sensor, and a displacement sensor. The angle sensor is installed on the steel structure, the stress sensor is installed on the lifting cable, and the displacement sensor is installed at the lifting point and the counterweight assembly of the steel structure. The angle sensor, stress sensor, and displacement sensor are electrically connected to the computer control system, which is also electrically connected to the lifting system and the adjustable counterweight system.

[0016] The technical solution of this invention has the following beneficial effects: 1. Compared with existing technologies, this invention employs a lifting system with three lifting points to lift the steel structure (i.e., the cantilever structure of an L-shaped high-rise connected building), and uses an adjustable counterweight system to dynamically adjust the counterweight of the steel structure during the lifting process to balance the overturning moment caused by the shift in the center of gravity of the steel structure. This method eliminates the need to evenly distribute four lifting points at the top of the L-shaped high-rise connected building, and also eliminates the need for additional giant ground-based lifting frames. While lifting the steel structure through the three lifting points, the adjustable counterweight system dynamically adjusts the counterweight of the steel structure, thereby solving the problem of balance control of the overall center of gravity of the steel structure during the lifting process, reducing construction costs and complexity, and improving construction efficiency and safety.

[0017] 2. Setting up a temporary reinforcement system can enhance the stiffness of the cantilevered end of the steel structure, thereby strengthening the steel structure during the lifting process, reducing undesigned deformation, and ensuring the closure accuracy and internal force distribution of the steel structure after lifting. Furthermore, since the temporary reinforcement system is located at the top of the steel structure, it allows construction personnel to utilize the space below the steel structure for equipment placement and material transportation, thus optimizing the use of construction space. This reduces construction difficulty and safety risks while minimizing undesigned deformation of the steel structure. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1A three-dimensional view of an L-shaped high-rise connected building and its steel structure; Figure 2 for Figure 1 Cross-sectional view of section AA; Figure 3 for Figure 2 Cross-sectional view of section BB in the middle; Figure 4 This is a schematic diagram of the construction of the suspended steel structure and lifting frame in the three-point balance lifting construction method for L-shaped high-rise connected steel structures. Figure 5 A schematic diagram of the construction of the steel structure and the reinforcing structure in the three-point balance lifting construction method for L-shaped high-rise connected steel structures; Figure 6 A schematic diagram of the installation of counterweight structure and lifting cable in the three-point balance lifting construction method for L-shaped high-rise connected steel structure; Figure 7 A schematic diagram of the lifting process using the three-point balance lifting method for L-shaped high-rise connected steel structures; Figure 8 A schematic diagram illustrating the three-point balanced lifting method used to lift the L-shaped high-rise connected steel structure into place. Figure 9 A 3D diagram showing the lifting of an L-shaped high-rise connected steel structure into place using a three-point balance lifting method.

[0020] Explanation of reference numerals: 1. Suspended floor truss; 2. L-shaped high-rise connected building; 3. First cross-shaped truss; 4. Second cross-shaped truss; 5. First connecting truss; 6. Second connecting truss; 7. Lifting frame; 8. Through-hole jack; 9. Reinforced mast; 10. Reinforced stay cable; 11. Lifting cable; 12. Counterweight assembly; 13. Temporary diagonal brace; 14. Temporary support frame; 15. Winch unit; 16. Counterweight cable; 17.

[0021] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0024] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0025] This invention proposes a three-point balanced lifting construction method for L-shaped high-rise connected steel structures.

[0026] like Figures 1 to 9 As shown, in Embodiment 1 of the present invention, the three-point balanced lifting construction method for the L-shaped high-rise connected steel structure includes: Step S1: Assemble the steel structure on the ground, and set up a lifting system with three lifting points on the top of the L-shaped high-rise connected building 3, so that the three lifting points are respectively connected to the three points of the steel structure to be lifted; Step S2: Set up an adjustable counterweight system. The counterweight of the steel structure is dynamically adjusted during the lifting process through the adjustable counterweight system to balance the overturning moment caused by the shift of the center of gravity of the steel structure. Step S3: After the steel structure is lifted to the top of the L-shaped high-rise connected building 3 and joined with the L-shaped high-rise connected building 3, first remove the adjustable counterweight system, and then remove the lifting system.

[0027] Compared with existing technologies, this invention employs a lifting system with three lifting points to lift the steel structure (i.e., the cantilever structure of the L-shaped high-rise connected building 3), and uses an adjustable counterweight system to dynamically adjust the counterweight of the steel structure during the lifting process to balance the overturning moment caused by the shift of the steel structure's center of gravity. This method eliminates the need to evenly distribute four lifting points at the top of the L-shaped high-rise connected building 3, and also eliminates the need for an additional giant ground-based lifting frame 8. By lifting the steel structure through the three lifting points while the adjustable counterweight system dynamically adjusts the counterweight, the problem of maintaining balance of the overall center of gravity of the steel structure during the lifting process is solved, reducing construction costs and complexity, and improving construction efficiency and safety.

[0028] like Figures 4 to 9 As shown, preferably, step S1 includes: Step S11: Set up a temporary support frame 15 on the ground and assemble the steel structure on the temporary support frame 15; Step S12: Install a temporary reinforcement system at the top of the steel structure; Step S13: Install a lifting system with three lifting points on the top of the L-shaped high-rise connected building 3, and connect the three lifting points to the three points of the steel structure to be lifted.

[0029] Setting up a temporary reinforcement system can enhance the stiffness of the cantilevered end of the steel structure, thereby strengthening the steel structure during the lifting process, reducing undesigned deformation, and ensuring the closure accuracy and internal force distribution of the steel structure after lifting. Furthermore, since the temporary reinforcement system is located at the top of the steel structure, it allows construction workers to utilize the space below the steel structure for equipment placement and material transportation, thus optimizing the use of construction space. This reduces construction difficulty and safety risks while minimizing undesigned deformation of the steel structure.

[0030] It is worth noting that when a temporary reinforcement system is set up, step S3 requires first removing the adjustable counterweight system, then removing the temporary reinforcement system, and finally removing the lifting system.

[0031] like Figures 1 to 3 As shown, after the L-shaped high-rise connected building 3 is joined with the steel structure, the steel structure forms the cantilever structure of the L-shaped high-rise connected building 3, which includes a cantilever truss 1 and a suspended floor truss 2. Specifically, the cantilever truss 1 includes a first cross-shaped truss 4 and a second cross-shaped truss 5 assembled into a cross shape, and a first connecting truss 6 and a second connecting truss 7 assembled into an L shape. The L-shaped boundary line on the inner side of the L-shaped high-rise connected building 3 forms a square with the first connecting truss 6 and the second connecting truss 7, and the first cross-shaped truss 4 and the second cross-shaped truss 5 coincide with the two diagonals of this square. Furthermore, a suspended floor truss 2 is set below the cantilever truss 1. The suspended floor truss 2 coincides with the vertical position of the first connecting truss 6 and the second connecting truss 7, but its structure is different from the latter two.

[0032] Preferably, the temporary reinforcement system is installed at the top of the steel structure along the straight line between the junction line of the L-shaped high-rise connected building 3 and the far end of the cantilever.

[0033] Preferably, the steel structure includes a first cross-shaped truss 4 and a second cross-shaped truss 5 assembled into a cross shape, and a first connecting truss 6 and a second connecting truss 7 assembled into an L shape; wherein one end of the first cross-shaped truss 4 is connected to the connection point of the first connecting truss 6 and the second connecting truss 7, and the other end is connected to the corner of the L-shaped high-rise connected building 3, and a temporary reinforcement system is set on the top of the first cross-shaped truss 4.

[0034] Preferably, the temporary reinforcement system includes a reinforcing mast 10 and a reinforcing cable 11. The reinforcing mast 10 is located in the middle of the first cross-shaped truss 4, and the two ends of the reinforcing cable 11 are respectively anchored to the two ends of the first cross-shaped truss 4. The middle part of the reinforcing cable 11 is anchored to the top of the reinforcing mast 10.

[0035] like Figures 5 to 9 As shown, in this embodiment, by setting a reinforcing mast 10 and a reinforcing stay cable 11 above the first cross-shaped truss 4, the two ends of the reinforcing stay cable 11 are anchored to the two ends of the first cross-shaped truss 4, and the middle part of the reinforcing stay cable 11 is anchored to the top of the reinforcing mast 10. This establishes a self-balancing prestressed system at the top of the steel structure, enhancing the stiffness of the far end of the cantilever (i.e., the end of the first cross-shaped truss 4 away from the L-shaped high-rise connected building 3), reducing the non-design deformation that the cantilever structure will produce under its own weight, and ensuring the closure accuracy and internal force distribution of the steel structure. In addition, the temporary reinforcement system composed of the reinforcing mast 10 and the reinforcing stay cable 11 has a simpler overall structure than the tensioned beam temporary reinforcement system, can be quickly installed and dismantled to improve construction efficiency, and is more suitable for cantilevered load-bearing structural systems, without generating additional loads on the supporting structure.

[0036] Preferably, the temporary support frame 15 is an inflatable airbag frame. The inflatable airbag frame can adaptively level itself when the ground is uneven, thereby ensuring the smooth assembly of the steel structure.

[0037] Preferably, the three lifting points are respectively located at both ends of the top surface of the L-shaped high-rise connected building 3 and at the corner junction. Each lifting point includes a lifting frame 8, a through-type jack 9, and a lifting cable 12. The lifting frame 8 is installed on the L-shaped high-rise connected building 3, and the through-type jack 9 is mounted on the lifting frame 8. The through-type jack 9 is connected to the rigid frame via the lifting cable 12. Specifically, the three through-type jacks 9 are respectively connected to three points on the steel structure via the lifting cable 12, thereby lifting the steel structure.

[0038] Preferably, the adjustable counterweight system includes a winch unit 16, a counterweight cable 17, and a counterweight assembly 13. The winch unit 16 is mounted on the steel structure, and the counterweight assembly 13 is connected to the winch unit 16 via the counterweight cable 17. During operation, the winch unit 16 adjusts the height of the counterweight assembly 13 by winding and unwinding the counterweight cable 17, thereby dynamically adjusting the counterweight of the steel structure during the lifting process to balance the overturning moment caused by the shift of the steel structure's center of gravity.

[0039] Preferably, a temporary diagonal brace 14 is provided at the adjustable counterweight system suspended by the steel structure. During operation, the temporary diagonal brace 14 can enhance the local stiffness of the adjustable counterweight system suspended by the steel structure.

[0040] Preferably, the adjustable counterweight system further includes a tilt sensor, a stress sensor, and a displacement sensor. The tilt sensor is mounted on the steel structure, the stress sensor is mounted on the lifting cable 12, and the displacement sensor is mounted at the lifting point and the counterweight 13 of the steel structure. The tilt sensor, stress sensor, and displacement sensor are electrically connected to the computer control system, which is also electrically connected to the lifting system and the adjustable counterweight system. Specifically, the tilt sensor is used to monitor the overall levelness of the steel structure, the stress sensor is used to monitor the internal force of the lifting cable 12 during lifting, and the displacement sensor is used to monitor the height difference between the lifting point and the counterweight 13. During operation, corresponding monitoring data are collected in real time through tilt sensors, stress sensors, and displacement sensors. The computer control system analyzes and processes the monitoring data, and based on the real-time analysis results, controls and adjusts the output of the through-hole jack 9 and the winch unit 16 to adjust the lifting speed and lifting balance of the lifting system, as well as the position and height of the counterweight 13. This dynamically adjusts the counterweight of the steel structure and balances the overturning moment caused by the shift of the center of gravity of the steel structure, solving the balance control problem of the overall center of gravity of the steel structure during the lifting process, reducing construction costs and complexity, and improving construction efficiency and safety.

[0041] Furthermore, a control learning algorithm can be established to further refine and improve the analysis, processing, and control behavior of the computer control system. Even further, stress sensors can be installed in the reinforcing stay cables 11 of the temporary reinforcement system, and a tensioning mechanism for the reinforcing mast 10 and reinforcing stay cables 11 can be set up. The stress sensors monitor the internal forces of the reinforcing stay cables 11 in real time, and the computer control system controls the tensioning mechanism to adjust the prestress of the temporary reinforcement system based on the corresponding monitoring data, in order to counteract the asymmetric deformation of the steel structure during the lifting process.

[0042] Specifically, the working principle and process of this instruction are as follows: First, a temporary support frame 15 is installed. Then, the steel structure is assembled on the temporary support frame 15, and a lifting frame 8 and a through-type jack 9 are installed on the top surface of the L-shaped high-rise connected building 3. After the steel structure is assembled and the lifting frame 8 and through-type jack 9 are installed, the three through-type jacks 9 are connected to three points of the steel structure by lifting cables 12. At the same time, an adjustable counterweight system and a temporary reinforcement system are installed on the steel structure.

[0043] After completing the above steps, the lifting system and adjustable counterweight system can be activated. This allows the steel structure to be lifted using three through-hole jacks 9, and the height of the counterweight 13 can be dynamically adjusted by the winch unit 16 to dynamically regulate the counterweight of the steel structure and balance the overturning moment caused by the shift in the steel structure's center of gravity. During the lifting process, tilt sensors monitor the overall levelness of the steel structure, stress sensors monitor the internal force of the lifting cable 12 during lifting, and displacement sensors monitor the height difference between the lifting point and the counterweight 13. Simultaneously, the computer control system analyzes and processes the corresponding monitoring data, enabling it to control and adjust the output of the through-hole jacks 9 and the winch unit 16 based on the real-time analysis results. This achieves the effect of adjusting the counterweight of the steel structure and balancing the overturning moment caused by the shift in the steel structure's center of gravity.

[0044] In addition, the internal forces of the reinforced cable 11 can be monitored in real time by stress sensors installed on the reinforced cable 11, and the corresponding monitoring data can be analyzed and processed by the computer control system. Based on the analysis and processing results, the tensioning mechanism can be controlled to adjust the prestress of the temporary reinforcement system to counteract the asymmetric deformation of the steel structure during the lifting process.

[0045] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A three-point balanced lifting construction method for an L-shaped high-rise connected steel structure, comprising: Step S1: Assemble the steel structure on the ground, and set up a lifting system with three lifting points on the top of the L-shaped high-rise connected building, so that the three lifting points are respectively connected to the three points of the steel structure to be lifted; Its characteristic is that it further includes: Step S2: Set up an adjustable counterweight system. The counterweight of the steel structure is dynamically adjusted during the lifting process through the adjustable counterweight system to balance the overturning moment caused by the shift of the center of gravity of the steel structure. Step S3: After the steel structure is lifted to the top of the L-shaped high-rise connected building and joined with the L-shaped high-rise connected building, first remove the adjustable counterweight system, and then remove the lifting system.

2. The three-point balanced lifting construction method for the L-shaped high-rise connected steel structure according to claim 1, characterized in that, Step S1 includes: Step S11: Set up a temporary support frame on the ground and assemble the steel structure on the temporary support frame; Step S12: Install a temporary reinforcement system at the top of the steel structure; Step S13: Install a lifting system with three lifting points on the top of the L-shaped high-rise connected building, and connect the three lifting points to three points of the steel structure to be lifted.

3. The three-point balanced lifting construction method for the L-shaped high-rise connected steel structure according to claim 2, characterized in that, The temporary reinforcement system is installed on the top of the steel structure along the straight line between the junction line and the far end of the cantilever of the L-shaped high-rise connected building.

4. The three-point balanced lifting construction method for the L-shaped high-rise connected steel structure according to claim 3, characterized in that, The steel structure includes a first cross-shaped truss and a second cross-shaped truss assembled into a cross shape, and a first connecting truss and a second connecting truss assembled into an L shape. One end of the first cross-shaped truss is connected to the connection between the first connecting truss and the second connecting truss, and the other end is connected to the corner of the L-shaped high-rise connected building. The temporary reinforcement system is set on the top of the first cross-shaped truss.

5. The three-point balanced lifting construction method for the L-shaped high-rise connected steel structure according to claim 4, characterized in that, The temporary reinforcement system includes a reinforcing mast and reinforcing stay cables. The reinforcing mast is located in the middle of the first cross-shaped truss. The two ends of the reinforcing stay cables are respectively anchored to the two ends of the first cross-shaped truss, and the middle part of the reinforcing stay cables is anchored to the top of the reinforcing mast.

6. The three-point balanced lifting construction method for an L-shaped high-rise connected steel structure according to claim 2, characterized in that, The temporary support frame is an inflatable airbag frame.

7. The three-point balanced lifting construction method for an L-shaped high-rise connected steel structure according to claim 2, characterized in that, The three lifting points are respectively located at both ends of the top surface of the L-shaped high-rise connected building and at the corner intersection line; The lifting point includes a lifting frame, a through-hole jack, and a lifting cable. The lifting frame is installed on an L-shaped high-rise connected building, and the through-hole jack is set on the lifting frame. The through-hole jack is connected to the rigid frame through the lifting cable.

8. The three-point balanced lifting construction method for an L-shaped high-rise connected steel structure according to claim 1, characterized in that, The adjustable counterweight system includes a winch unit, a counterweight cable, and a counterweight assembly. The winch unit is installed on a steel structure, and the counterweight assembly is connected to the winch unit via the counterweight cable.

9. The three-point balanced lifting construction method for an L-shaped high-rise connected steel structure according to claim 8, characterized in that, Temporary diagonal bracing is provided at the adjustable counterweight system of the steel structure suspension.

10. The three-point balanced lifting construction method for an L-shaped high-rise connected steel structure according to claim 8, characterized in that, The adjustable counterweight system also includes an angle sensor, a stress sensor, and a displacement sensor. The angle sensor is installed on the steel structure, the stress sensor is installed on the lifting cable, and the displacement sensor is installed at the lifting point and the counterweight assembly of the steel structure. The angle sensor, stress sensor, and displacement sensor are electrically connected to the computer control system, which is also electrically connected to the lifting system and the adjustable counterweight system.

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