A method for synchronous lifting construction of large-span steel structures under space-constrained conditions

Abstract

The present invention discloses a method for synchronously lifting and constructing a large-span steel structure under space-constrained conditions, comprising the following steps: Step 1, simulated lifting: determine the positions of the sling, lifting device and fixed frame through simulated lifting, Step 2, on-site assembly and lifting construction: perform on-site assembly and lifting construction according to the simulated data, and complete the construction. By utilizing the completed structural columns, the lifting devices are installed on the structural columns. This on-site assembly and lifting method does not require large-scale lifting equipment to complete the lifting, and can quickly complete the lifting of large-span steel structure supports under space-constrained conditions. Whether the lifting device, sling and mounting frame are safe during the lifting process is simulated by computer, thereby avoiding collisions during the lifting process. All lifting devices are connected to the control system, which can ensure that the steel structure support is lifted at multiple points during the lifting process, reduce deformation during the lifting process, and ensure the quality of the final forming.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a method for synchronously lifting a large-span steel structure under space-constrained conditions. Background Art

[0002] In construction, traditional steel structure hoisting and lifting is completed using large hoisting equipment. However, in the construction of the Hengdian Station steel structure project, the above method is not applicable. The east and west sides of the project are the entrances and exits of the railway, with tracks under construction and completed tracks. There are other construction units on the south and north sides of the project, and there are no working positions for large hoisting equipment. The steel structure of this project has a large span, which further increases the difficulty of construction. Therefore, a construction method for synchronously lifting large-span steel structures under limited space is urgently needed to solve the problem of lifting large-span steel structures under limited space similar to this project. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the present invention designs a method for synchronous lifting construction of large-span steel structures under space-constrained conditions, which includes the following steps: Step 1, simulated lifting: Step 1.1, establish a model of the existing building at the construction site and a model of the steel structure frame; Step 1.2, determine the best lifting point on the steel structure frame and the best lifting position based on the model of the existing building and the model of the steel structure frame; Step 1.3, establish a model of the sling at the best lifting point position of the steel structure frame model, and establish a model of the lifting device at the best lifting position; Step 1.4, establish a model of the fixed frame, and analyze the structure and The position is verified, wherein the fixing frame is used to install the lifting device on the structural column of the existing building; Step 2, on-site assembly and hoisting construction; Step 2.1, assemble the steel structure frame at the construction site; Step 2.2, install the hoisting device at the optimal lifting point of the steel structure frame; Step 2.3, assemble the fixing frame, and install the lifting device on the structural column of the existing building through the fixing frame; Step 2.4, connect all the lifting devices to the control system; Step 2.5, control all the lifting devices to lift synchronously through the control system, and after the steel structure frame is lifted to the predetermined position, fix the steel structure frame on the structural column of the existing building.

[0004] Preferably, a group of lifting devices is provided on the inner side of the structural columns of the existing building at the edge position; and a group of lifting devices is provided on both sides of the structural columns of the existing building at the middle position.

[0005] Preferably, the best hanging point is determined in the lower frame of the steel structure frame.

[0006] Preferably, the optimal lifting point and the optimal lifting position are located on the same vertical plane.

[0007] Preferably, in step 1.2, the optimal lifting point on the steel structure frame and the optimal lifting position are determined, including the following steps: performing a force analysis on each frame of the lowest layer of the steel structure frame by a computer; selecting an initial lifting point that meets the force conditions below the inner side of the structural column of the existing building at the edge position and below both sides of the structural column of the existing building at the middle position, and determining the initial lifting position directly above the preliminary lifting point; establishing a sling at the initial ceiling and establishing a lifting device at the initial lifting position; operating the steel structure frame to simulate the lifting movement, checking whether the sling at the initial lifting point and the lifting device at the initial lifting position will collide with the existing building or steel structure frame during the lifting process, if a collision occurs, adjusting the initial lifting point and the initial lifting position, if there is no collision, the initial lifting point is the optimal lifting point, and the initial lifting position is the optimal lifting position.

[0008] Preferably, in step 1.4, the position of the fixing frame is inspected, including the following steps: operating the steel structure frame to simulate the lifting movement, checking whether the fixing frame will collide with the existing building or steel structure frame, if a collision occurs, adjusting the structure of the fixing frame or adjusting the position of the fixing frame, if there is no collision, determining the structure and position of the fixing frame.

[0009] Preferably, the fixing frame includes a fixing bracket and a mounting bracket; the lifting device is installed on the fixing bracket; the fixing bracket is installed on the mounting bracket; and the mounting bracket is installed on a structural column of an existing building.

[0010] Compared with the closest prior art, the present invention has the following beneficial effects:

[0011] 1. The present invention utilizes the completed structural columns and installs the lifting devices on the structural columns. This on-site assembly and lifting method does not require large-scale lifting equipment to complete the lifting. When space is limited, the large-span steel structure support can be quickly lifted.

[0012] 2. The present invention uses computer simulation to determine whether the lifting device, the sling and the mounting frame are safe during the lifting process, thereby avoiding collisions during the lifting process and ensuring the progress and safety of the construction.

[0013] 3. All lifting devices of the present invention are connected to the control system, which can ensure that the large-span steel structure support is lifted at multiple points during the lifting process, reduce the deformation of the large-span steel structure support during the lifting process, and ensure the quality of the final forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic flow chart of the construction method of the present invention.

[0015] Figure 2 It is a structural schematic diagram of the steel structure frame and the sling of the present invention.

[0016] Figure 3 It is a structural schematic diagram of the lifting device and the fixing frame of the present invention.

[0017] Reference numerals:

[0018] 1-Steel structure frame, 2-Lifting device, 3-Lifting device, 4-Fixed bracket, 5-Mounting bracket. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0020] Example 1

[0021] like Figure 1-Figure 3 As shown, the present invention provides a method for synchronously lifting a large-span steel structure under space-constrained conditions, comprising the following steps:

[0022] S1. Simulated lifting:

[0023] S1.1. Build a model of the existing building at the construction site and a model of the steel structure frame 1.

[0024] S1.2. Determine the optimal lifting point on steel structure frame 1 and the optimal lifting position based on the existing building model and the steel structure frame 1 model. The optimal lifting point is determined in the lower frame of steel structure frame 1. The optimal lifting point and the optimal lifting position are located on the same vertical plane. A set of lifting devices 3 is installed on the inner side of the existing building's structural columns at the edge; a set of lifting devices 3 is installed on each side of the existing building's structural columns at the center. Determining the optimal lifting point on the steel structure frame 1 and determining the optimal lifting position includes the following steps: performing a force analysis on each frame of the lowest layer of the steel structure frame 1 through a computer; selecting an initial lifting point that meets the force conditions below the inner side of the structural column of the existing building at the edge position and below both sides of the structural column of the existing building at the middle position, and determining the initial lifting position directly above the preliminary lifting point; establishing a sling 2 at the initial ceiling and establishing a lifting device 3 at the initial lifting position; operating the steel structure frame 1 to simulate the lifting movement, checking whether the sling 2 at the initial lifting point and the lifting device 3 at the initial lifting position will collide with the existing building or the steel structure frame 1 during the lifting process, and if a collision occurs, adjusting the initial lifting point and the initial lifting position; if there is no collision, the initial lifting point is the optimal lifting point and the initial lifting position is the optimal lifting position.

[0025] S1.3. Establish a model of the sling 2 at the optimal lifting point position of the steel structure frame 1 model, and establish a model of the lifting device 3 at the optimal lifting position.

[0026] S1.4. Build a model of the fixed frame, which includes a fixed bracket 4 and a mounting bracket 5; the lifting device 3 is mounted on the fixed bracket 4; the fixed bracket 4 is mounted on the mounting bracket 5; and the mounting bracket 5 is mounted on the structural column of the existing building. Verify the structure and position of the fixed frame, operate the steel structure frame 1 to simulate the lifting movement, and check whether the fixed frame will collide with the existing building or the steel structure frame 1. If a collision occurs, adjust the structure or position of the fixed frame. If there is no collision, determine the structure and position of the fixed frame. The fixed frame is used to install the lifting device 3 on the structural column of the existing building. By computer simulation, the safety of the lifting device, sling, and mounting frame during the lifting process is avoided, ensuring the progress and safety of the construction.

[0027] S2. On-site assembly and hoisting construction:

[0028] S2.1. Assemble the steel structure frame 1 at the construction site.

[0029] S2.2. Install the sling 2 at the optimal lifting point of the steel structure frame 1.

[0030] S2.3. Assemble the fixing frame and install the lifting device 3 on the structural column of the existing building through the fixing frame. Using the already constructed structural column, the lifting device is installed on the structural column. This on-site assembly and lifting method does not require large lifting equipment to complete the lifting. It can quickly complete the lifting of large-span steel structure supports in space-constrained situations.

[0031] S2.4. Connect all lifting devices 3 to the control system.

[0032] S2.5. The control system controls the simultaneous lifting of all lifting devices 3. After the steel structure frame 1 is lifted to the desired position, it is secured to the structural columns of the existing building. All lifting devices are connected to the control system, ensuring that the large-span steel structure frame is lifted simultaneously at multiple points during the lifting process. This reduces deformation during the installation process and ensures the quality of the final structure.

[0033] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the pending claims.

Claims

1. A method for synchronously lifting a large-span steel structure under space-constrained conditions, characterized in that: The following steps are involved: Step 1: Simulate hoisting: Step 1.1: Create a model of the existing building at the construction site and a model of the steel structure frame (1); Step 1.2, determining the best lifting point on the steel structure frame (1) and the best lifting position based on the model of the existing building and the model of the steel structure frame (1); Step 1.3, establishing a model of the sling (2) at the optimal lifting point position of the steel structure frame (1) model, and establishing a model of the lifting device (3) at the optimal lifting position; Step 1.4, establishing a model of a fixing frame and verifying the structure and position of the fixing frame, wherein the fixing frame is used to install the lifting device (3) on the structural column of the existing building; Step 2: On-site assembly and hoisting construction: Step 2.1, assemble the steel structure frame at the construction site (1); Step 2.2, install the sling (2) at the optimal lifting point of the steel structure frame (1); Step 2.3, assemble the fixing frame, and install the lifting device (3) on the structural column of the existing building through the fixing frame; Step 2.4, connect all lifting devices (3) to the control system; Step 2.5, controlling all the lifting devices (3) to lift synchronously through the control system, so that the large-span steel structure frame is lifted at multiple points during the lifting process, and after the steel structure frame (1) is lifted to a predetermined position, the steel structure frame (1) is fixed to the structural column of the existing building; A set of lifting devices (3) is provided on the inner side of the structural column of the existing building at the edge position; a set of lifting devices (3) is provided on both sides of the structural column of the existing building at the middle position; Wherein, in step 1.2, determining the best lifting point on the steel structure frame (1) and determining the best lifting position includes the following steps: Perform stress analysis on each frame of the lowest layer of the steel structure frame (1) by computer; Select initial lifting points that meet the load-bearing conditions below the inner side of the structural columns of the existing buildings at the edge positions and below both sides of the structural columns of the existing buildings at the middle positions, and determine the initial lifting position directly above the preselected lifting points; Establishing a sling (2) at the initial lifting point and establishing a lifting device (3) at the initial lifting position; The steel structure frame (1) is operated to simulate a lifting movement, and it is checked whether the sling (2) at the initial lifting point and the lifting device (3) at the initial lifting position will collide with the existing building or the steel structure frame (1) during the lifting process. If a collision occurs, the initial lifting point and the initial lifting position are adjusted. If there is no collision, the initial lifting point is the optimal lifting point, and the initial lifting position is the optimal lifting position.

2. The method for synchronously lifting a large-span steel structure under space-constrained conditions as claimed in claim 1, characterized in that: The optimal hanging point is determined in the lower frame of the steel structure frame (1).

3. The method for synchronously lifting a large-span steel structure under space-constrained conditions as claimed in claim 2, characterized in that: The optimal lifting point and the optimal lifting position are located on the same vertical plane.

4. The method for synchronously lifting a large-span steel structure under space-constrained conditions as claimed in claim 1, characterized in that: In step 1.4, the position of the fixing frame is checked, including the following steps: The steel structure frame (1) is operated to simulate a lifting movement, and the fixing frame is checked to see whether it will collide with the existing building or the steel structure frame (1). If a collision occurs, the structure of the fixing frame is adjusted or the position of the fixing frame is adjusted. If no collision occurs, the structure and position of the fixing frame are determined.

5. The method for synchronously lifting a large-span steel structure under space-constrained conditions as claimed in claim 1 is characterized in that: The fixing frame comprises a fixing bracket (4) and a mounting bracket (5); The lifting device (3) is mounted on the fixed bracket (4); The fixing bracket (4) is mounted on the mounting bracket (5); The mounting bracket (5) is mounted on a structural column of an existing building.

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