Prefabricated rectangular steel column auxiliary installation system and method of using the same

Abstract

The application discloses an auxiliary installation system for fabricated rectangular steel columns, which comprises an installation frame and a sliding steel plate. The installation frame is sleeved at the connecting position of an upper rectangular steel column and a lower rectangular steel column. The upper end of the installation frame is used for guiding the suspended upper rectangular steel column into the installation frame to realize the connection with the lower rectangular steel column. The sliding steel plate is arranged between the inner side of the installation frame and the rectangular steel column. The sliding steel plate can be driven to slide along the height direction on the surface of the rectangular steel column and expose or close the joint between the upper rectangular steel column and the lower rectangular steel column in the installation frame. The application further discloses a use method of the auxiliary installation system for fabricated rectangular steel columns. The auxiliary installation system for fabricated rectangular steel columns and the construction method thereof can reduce the dependence on tower crane equipment during the construction of the fabricated rectangular steel columns, effectively improve the installation precision of the rectangular steel columns, greatly improve the construction efficiency and reduce the construction cost.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, specifically to an auxiliary installation system for prefabricated rectangular steel columns and its usage method. Background Technology

[0002] Due to their significant weight, prefabricated rectangular steel columns are typically installed using tower cranes. During construction, the tower crane suspends the upper-level rectangular steel column to be installed and lowers it onto the lower-level, already installed rectangular steel columns. Workers adjust the position and verticality of the steel columns by tapping the plugs inserted into the gaps between the upper and lower columns. Then, spot welding and bolts are used to secure the upper and lower rectangular steel columns. Because the tower crane is occupied for a considerable period during installation—averaging 1-2 hours per column, sometimes even longer—the efficiency of the tower crane cannot be guaranteed. Furthermore, since prefabricated rectangular steel columns weigh anywhere from five or six tons to seven or eight tons, manual alignment during hoisting presents significant difficulties and safety hazards. Manual operation is also prone to errors, easily leading to deviations in verticality and displacement between the upper and lower columns, which cannot be effectively addressed.

[0003] Therefore, it is necessary to improve the existing prefabricated rectangular steel column installation method so that it can effectively improve the installation accuracy of rectangular steel columns, while significantly increasing construction efficiency and reducing construction costs. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this application provides a prefabricated rectangular steel column auxiliary installation system and its usage method. By setting up the auxiliary installation system, the rectangular steel column no longer occupies the tower crane after being hoisted into place, significantly improving the tower crane's utilization efficiency, reducing construction costs, and increasing construction efficiency. Simultaneously, during the hoisting process of the rectangular steel column, the auxiliary installation system can gradually adjust the posture of the upper steel column through the cooperation of the ball bearings of the sliding steel plate and the installation frame, ensuring that the position and verticality of the upper steel column are consistent with the lower rectangular steel column after hoisting, eliminating the need for manual hammering and alignment, thus improving both construction efficiency and safety.

[0005] This invention provides a pre-embedded bolt positioning device for connecting prefabricated columns, comprising an installation frame and a sliding steel plate. The installation frame is sleeved at the connection between an upper rectangular steel column and a lower rectangular steel column. The lower end of the installation frame is connected and fixed to the upper end of the lower rectangular steel column. The upper end of the installation frame is used to guide the suspended upper rectangular steel column into the installation frame to achieve connection with the lower rectangular steel column. After the upper rectangular steel column enters the installation frame, the upper end of the installation frame is connected and fixed to the lower end of the upper rectangular steel column.

[0006] The sliding steel plate is disposed between the inner side of the mounting frame and the rectangular steel column. The sliding steel plate can be driven to slide along the height direction on the surface of the rectangular steel column and expose or close the joint between the upper and lower rectangular steel columns in the mounting frame.

[0007] Furthermore, the mounting frame is provided with an upper connecting part, a middle connecting part and a lower connecting part along the height direction of the rectangular steel column. Several fasteners are provided on the upper connecting part, the middle connecting part and the lower connecting part, and the mounting frame is connected and fixed to the rectangular steel column through the fasteners.

[0008] Furthermore, the installation frame includes a rectangular skeleton erected on one side wall of the rectangular steel column and a U-shaped frame set on the other three side walls of the rectangular steel column. The rectangular skeleton has connecting columns on both sides of its width end. The U-shaped frame is provided with connectors that are fastened to the connecting columns. The U-shaped frame is fastened to the connecting columns on the rectangular skeleton through the connectors to form an integral installation frame.

[0009] Furthermore, the U-shaped frame includes several horizontally arranged U-shaped skeletons and vertically arranged connecting angle steels. The several U-shaped skeletons are arranged along the height direction and connected by the connecting angle steels to form the U-shaped frame as a whole.

[0010] Furthermore, the rectangular frame includes a crossbeam and a column, and a reinforcing crossbeam is provided inside the rectangular frame, which is parallel to the crossbeam. Several fasteners are distributed on both the crossbeam and the reinforcing crossbeam.

[0011] Furthermore, the U-shaped frame is composed of three crossbeams spliced ​​together, and each crossbeam has several fasteners distributed on it.

[0012] Furthermore, the sliding steel plate includes a sliding section and a flat section. The sliding section is disposed at the upper end of the sliding steel plate. The sliding section has a plurality of grooves on the contact side with the upper rectangular steel column. The grooves are provided with sliding components for sliding cooperation with the side wall of the upper rectangular steel column.

[0013] Furthermore, the sliding assembly includes a sliding ball and a plurality of balls disposed between the bottom of the groove and the sliding ball. The opening of the groove is provided with a limiting part for preventing the sliding ball and the balls from falling out of the groove. The opening diameter of the limiting part is smaller than the sum of the diameter of the sliding ball and the diameter of the balls.

[0014] It also includes a method for using a prefabricated rectangular steel column auxiliary installation system, applicable to the aforementioned prefabricated rectangular steel column auxiliary installation system, comprising the following steps:

[0015] S1. Hoist the U-shaped frame to the installation position of the lower rectangular steel column and temporarily fix it to the lower rectangular steel column using the fasteners on the lowest U-shaped frame. Then hoist the rectangular frame to the installation position and connect it to the connecting column of the rectangular frame with the connectors on the U-shaped frame to form the installation frame. Then tighten all the fasteners on the lower connection part and remove the tower crane hook.

[0016] S2. Hoist the sliding steel plate and align its centerline with the top edge of the lower rectangular steel column. Place it between the installation frame and the lower rectangular steel column. Loosen the fasteners on the lower end of the side wall connection when placing it. Once the sliding steel plate has fallen to the predetermined position, tighten the fasteners on the lower end of the side wall connection to fix the sliding steel plate. Then complete the installation of the sliding steel plates on the other side walls of the lower rectangular steel column.

[0017] S3. Hoist the upper rectangular steel column and slowly and vertically send it into the upper opening of the auxiliary installation system. The upper rectangular steel column can be corrected in positioning and verticality during the sliding process through the sliding section on the sliding steel plate until it falls above the lower rectangular steel column. After tightening all the fasteners of the upper end connection of the installation frame, remove the tower crane hook to achieve the fixation between the upper and lower rectangular steel columns.

[0018] S4. Unscrew the fasteners at the upper end of the side wall of the upper rectangular steel column, and slide the sliding steel plate until the joint between the upper and lower rectangular steel columns is exposed. Then tighten the fasteners at the middle and upper ends of the side wall to fix the sliding steel plate, and then perform welding at the joint.

[0019] S5. After the welding work at the joint of the side wall is completed, unscrew the fasteners on the middle connection part and the upper connection part to allow the sliding steel plate to slide down and reset, and then tighten the fasteners on the lower connection part and the upper connection part.

[0020] S6. Repeat steps S4 and S5 until all the joints on all sides of the rectangular steel column are welded. Then remove the auxiliary installation system and proceed with the connection work at the four corners of the upper and lower rectangular steel columns until the welds at the joints are full.

[0021] In summary, this application has at least one of the following beneficial effects: The prefabricated rectangular steel column auxiliary installation system and its method of use in this invention, by setting up an auxiliary installation system, eliminates the need for tower cranes after the rectangular steel columns are hoisted into place, significantly improving the utilization efficiency of tower cranes, reducing construction costs, and increasing construction efficiency; at the same time, during the hoisting process of the rectangular steel columns, the auxiliary installation system can gradually adjust the posture of the upper steel columns through the cooperation of the ball bearings of the sliding steel plate and the installation frame, ensuring that the position and verticality of the upper steel columns are consistent with the lower rectangular steel columns after hoisting, eliminating the need for manual hammering and straightening, thus improving both construction efficiency and safety. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the prefabricated rectangular steel column auxiliary installation system of the present invention;

[0023] Figure 2 This is a schematic diagram of the mounting frame in this invention;

[0024] Figure 3 This is a schematic diagram of the sliding steel plate in this invention;

[0025] Figure 4 This is a schematic diagram of the sliding component in this invention;

[0026] Figure 5 This is a schematic diagram showing the connection between the auxiliary installation system and the upper and lower rectangular steel columns in this invention;

[0027] Figure 6 This is a schematic diagram of the auxiliary installation system in this invention during the welding operation at the joint between the upper and lower rectangular steel columns;

[0028] Explanation of reference numerals in the attached drawings: 1-Mounting frame; 2-Sliding steel plate; 3-Lower rectangular steel column; 4-Upper rectangular steel column; 5-Rectangular skeleton; 6-U-shaped frame; 7-Connecting column; 8-Connector; 9-U-shaped skeleton; 10-Connecting angle steel; 11-Fixing component; 12-Sliding assembly; 13-Upper connection part; 14-Middle connection part; 15-Lower connection part; 201-Sliding section; 202-Flattening section; 1201-Ball bearing; 1202-Rolling ball. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] This invention provides an auxiliary installation system for prefabricated rectangular steel columns, comprising an installation frame 1 and a sliding steel plate 2. The installation frame 1 is sleeved at the connection between an upper rectangular steel column 4 and a lower rectangular steel column 3. The lower end of the installation frame 1 is connected and fixed to the upper end of the lower rectangular steel column 3. The upper end of the installation frame 1 is used to guide the suspended upper rectangular steel column 4 into the installation frame to achieve connection with the lower rectangular steel column 3. After the upper rectangular steel column 4 enters the installation frame 1, the upper end of the installation frame 1 is connected and fixed to the lower end of the upper rectangular steel column 4.

[0031] The sliding steel plate 2 is disposed between the inner side of the mounting frame 1 and the rectangular steel column. The sliding steel plate 2 can be driven to slide along the height direction on the surface of the rectangular steel column and expose or close the joint between the upper rectangular steel column 4 and the lower rectangular steel column 3 in the mounting frame 1.

[0032] In this embodiment, by setting up an installation frame 1 on the lower rectangular steel column 3, a temporary connection between the upper and lower rectangular steel columns can be achieved when the upper rectangular steel column 4 is hoisted onto the lower rectangular steel column 3. Furthermore, the tower crane can be dismantled after the upper rectangular steel column is in place, eliminating the need to occupy it during subsequent welding operations. This significantly improves the tower crane's utilization efficiency, reduces construction costs, and increases construction efficiency. Simultaneously, the sliding steel plate 2 in this auxiliary installation system works in conjunction with the installation frame to gradually adjust the posture of the upper rectangular steel column 4 during the hoisting process, ensuring that the position and verticality of the upper rectangular steel column 4 are consistent with the lower rectangular steel column 3 after hoisting. This eliminates the need for manual hammering for alignment, improving both construction efficiency and safety.

[0033] In this embodiment, the mounting frame 1 is provided with an upper connecting part 13, a middle connecting part 14, and a lower connecting part 15 along the height direction of the rectangular steel column. Several fasteners 11 are respectively provided on the upper connecting part 13, the middle connecting part 14, and the lower connecting part 15, and the mounting frame 1 is connected and fixed to the rectangular steel column through the fasteners 11. Since the lower end of the mounting frame 1 is connected and fixed to the upper end of the lower rectangular steel column 3, and the upper end of the mounting frame 1 is connected and fixed to the lower end of the upper rectangular steel column 4 after the upper rectangular steel column 4 enters the mounting frame 1, the mounting frame 1 is connected and fixed to the lower end of the upper rectangular steel column 4 along the height direction of the rectangular steel column. The installation frame 1 is provided with an upper connecting part 13, a middle connecting part 14, and a lower connecting part 15. Several fasteners 11 are provided on the upper connecting part 13, the middle connecting part 14, and the lower connecting part 15 to connect and fix the installation frame 1 to the rectangular steel column. The fasteners 11 are mainly bolts. The installation frame 1 can be quickly assembled and disassembled on the rectangular steel column by tightening or loosening the bolts. At the same time, the upper connecting part 13, the middle connecting part 14, and the lower connecting part 15 are provided to strengthen the overall strength when the installation frame 1 temporarily connects the upper rectangular steel column and the lower rectangular steel column, thereby avoiding the use of tower crane equipment.

[0034] In this embodiment, the mounting frame 1 includes a rectangular skeleton 5 erected on one side wall of a rectangular steel column and a U-shaped frame 6 installed on the other three side walls of the rectangular steel column. The rectangular skeleton 5 has connecting columns 7 on both sides of its width end. The U-shaped frame 6 is provided with connecting pieces 8 that engage with the connecting columns. The U-shaped frame 6 is connected to the connecting columns 7 on the rectangular skeleton via the connecting pieces 8, forming the entire mounting frame 1. Figure 2As shown, the mounting frame 1 is formed by interlocking a rectangular skeleton 5 and a U-shaped frame 6. The rectangular skeleton 5 has connecting columns 7 welded to both ends in the width direction. The connecting columns 7 are bent 90 degrees in a horizontal direction parallel to the sidewalls of the rectangular steel columns to form a hook structure. The U-shaped frame 6 has connecting pieces 8 at positions that mate with the connecting columns 7 of the rectangular skeleton 5. The connecting pieces 8 are mainly fasteners. The fixed part of the fastener is hinged to the U-shaped frame 6, and the front end of the movable part of the fastener has a hanging ring, which connects to the hook structure on the connecting column 7 to achieve the interlocking of the rectangular skeleton 5 and the U-shaped frame 6. The fastener is an existing structure and will not be described in detail here. The connecting columns 7 and connecting pieces 8 are installed in pairs on the rectangular skeleton 5 and the U-shaped frame 6. In this design, a set of connecting columns 7 and connecting pieces 8 is provided at the bottom, middle, and top of the mounting frame 1 in the vertical direction. Each set contains two sets, which are respectively located at both ends of the rectangular skeleton 5 in the width direction.

[0035] In this embodiment, the U-shaped frame 6 includes several horizontally arranged U-shaped skeletons 9 and vertically arranged connecting angle steels 10. The several U-shaped skeletons 9 are arranged along the height direction and connected by the connecting angle steels 10 to form the U-shaped frame 6 as a whole; combined with Figure 2 As shown, in this scheme, the U-shaped frame 6 is composed of three sets of U-shaped skeletons 9 arranged sequentially along the height direction and two connecting angle steels 10 erected at the corners of the U-shaped skeletons 9. The three sets of U-shaped skeletons 9 are respectively set at the top, middle and bottom of the connecting angle steels 10. The U-shaped skeleton 9 is formed by welding three horizontal steel plates together to form a U-shaped structure, and each horizontal steel plate has several fasteners 11 evenly distributed along the length direction.

[0036] In this embodiment, the rectangular frame 5 includes a crossbeam and columns. A reinforcing crossbeam parallel to the crossbeam is provided within the rectangular frame, and several fasteners 11 are distributed on both the crossbeam and the reinforcing crossbeam. Figure 2 As shown, the rectangular frame 5 in this scheme is formed by combining two horizontal steel plates and two connecting angle steels 10 set at both ends of the horizontal steel plates. A reinforcing horizontal steel plate is added inside the rectangular frame 5 to form a H-shaped mechanism. The three horizontal steel plates on the rectangular frame 5 are set on the same horizontal plane as the top U-shaped frame, middle U-shaped frame and bottom U-shaped frame on the U-shaped frame 6. Furthermore, several fasteners 11 are evenly distributed along the length direction on the three horizontal steel plates on the rectangular frame 5.

[0037] In this embodiment, the sliding steel plate 2 includes a sliding section 201 and a flat section 202. The sliding section 201 is disposed on the upper end of the sliding steel plate 2. The sliding section 201 has a plurality of grooves on the contact side with the upper rectangular steel column. A sliding component 12 for sliding cooperation with the side wall of the upper rectangular steel column is disposed in the groove; combined with Figure 3As shown, the sliding steel plate 2 includes a sliding section 201 and a flat section 202. The sliding section 201 has two layers of groove groups on the contact side with the upper rectangular steel column. Each groove group contains multiple grooves on the same horizontal plane, and each groove is equipped with a sliding component 12. The sliding component 12 enables the sliding steel plate 2 to slide on the side wall of the upper rectangular steel column. At the same time, it can guide and correct the verticality of the upper rectangular steel column 4 when it is hoisted into the installation frame 1.

[0038] In this embodiment, the sliding assembly 12 includes a sliding ball 1202 and a plurality of rolling balls 1201 disposed between the bottom of the groove and the sliding ball. A limiting portion is provided at the opening of the groove to prevent the sliding ball 1202 and the rolling balls 1201 from falling out of the groove. The opening diameter of the limiting portion is smaller than the sum of the diameters of the sliding ball and the rolling balls. Figure 4 As shown, the sliding assembly 12 includes a sliding ball 1202 and several balls 1201 disposed between the bottom of the groove and the sliding ball. The balls 1201 slide between the bottom of the groove and the sliding ball, thereby ensuring that the sliding ball 1202 can slide and engage with the side wall of the upper rectangular steel column 4. At the same time, in order to prevent the sliding ball 1202 and the balls 1201 from falling out of the groove, a limiting part is provided for limiting. The limiting part is designed to ensure that the opening diameter is smaller than the sum of the diameter of the sliding ball and the diameter of the balls.

[0039] This embodiment also includes a method for using a prefabricated rectangular steel column auxiliary installation system, applicable to the aforementioned prefabricated rectangular steel column auxiliary installation system, comprising the following steps:

[0040] S1. Hoist the U-shaped frame 6 to the installation position of the lower rectangular steel column 3 and temporarily fix it to the lower rectangular steel column 3 using the lowest fixing piece 11 on the U-shaped frame. Then hoist the rectangular frame 5 to the installation position and fasten it to the connecting column 7 of the rectangular frame through the connector 8 on the U-shaped frame 6 to form the installation frame 1. Then tighten all the fixing pieces 11 on the lower connecting part 15 and remove the tower crane hook.

[0041] S2. Hoist the sliding steel plate 2 and align its centerline with the top edge of the lower rectangular steel column 3. Place it between the installation frame 1 and the lower rectangular steel column 3. Loosen the fastener 11 on the lower end connection 15 of the side wall when placing it. After the sliding steel plate 2 falls to the predetermined position, tighten the fastener 11 on the lower end connection of the side wall to fix the sliding steel plate on that side. Then complete the installation of the sliding steel plates 2 on other side walls of the lower rectangular steel column 3.

[0042] S3. Hoist the upper rectangular steel column 4 and slowly and vertically send it into the upper opening of the auxiliary installation system. The upper rectangular steel column 4 can be corrected in positioning and verticality during the downward movement through the sliding section 201 on the sliding steel plate until it falls above the lower rectangular steel column 3. After tightening all the fixing parts 11 of the upper end connection part 13 of the installation frame, remove the tower crane hook to achieve the fixation between the upper rectangular steel column 3 and the lower rectangular steel column 4.

[0043] S4. Unscrew the fastener 11 of the upper end connection 13 of one side wall of the upper rectangular steel column 4, and slide the sliding steel plate 2 up until the joint between the upper rectangular steel column 4 and the lower rectangular steel column 3 is exposed. Then tighten the fastener 11 on the middle connection 14 and the upper end connection 13 of the side wall to fix the sliding steel plate. Then perform welding at the joint.

[0044] S5. After the welding work at the joint of the side wall is completed, unscrew the fasteners 11 on the middle connecting part 14 and the upper connecting part 13 to allow the sliding steel plate 2 to slide down and reset, and then tighten the fasteners 11 on the lower connecting part 15 and the upper connecting part 13.

[0045] S6. Repeat steps S4 and S5 until all the joints on all sides of the rectangular steel column are welded. Then remove the auxiliary installation system and proceed with the connection work at the four corners of the upper rectangular steel column 4 and the lower rectangular steel column 3.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A prefabricated rectangular steel column auxiliary installation system, characterized in that: The system includes an installation frame and a sliding steel plate. The installation frame is fitted onto the connection between the upper and lower rectangular steel columns. The lower end of the installation frame is connected and fixed to the upper end of the lower rectangular steel column. The upper end of the installation frame is used to guide the suspended upper rectangular steel column into the installation frame to achieve connection with the lower rectangular steel column. After the upper rectangular steel column enters the installation frame, the upper end of the installation frame is connected and fixed to the lower end of the upper rectangular steel column. The sliding steel plate is disposed between the inner side of the mounting frame and the rectangular steel column. The sliding steel plate can be driven to slide along the height direction on the surface of the rectangular steel column and expose or close the joint between the upper and lower rectangular steel columns in the mounting frame. The mounting frame is provided with an upper connecting part, a middle connecting part and a lower connecting part along the height direction of the rectangular steel column. Several fasteners are provided on the upper connecting part, the middle connecting part and the lower connecting part, and the mounting frame is connected and fixed to the rectangular steel column through the fasteners. The installation frame includes a rectangular skeleton erected on one side wall of a rectangular steel column and a U-shaped frame set on the other three side walls of the rectangular steel column. The rectangular skeleton has connecting columns on both sides at its width end. The U-shaped frame is provided with connectors that are fastened to the connecting columns. The U-shaped frame is fastened to the connecting columns on the rectangular skeleton through the connectors to form an integral installation frame. The sliding steel plate includes a sliding section and a flat section. The sliding section is disposed at the upper end of the sliding steel plate. The sliding section has a plurality of grooves on the contact side with the upper rectangular steel column. The grooves are provided with sliding components for sliding cooperation with the side wall of the upper rectangular steel column. The sliding assembly includes a sliding ball and several balls disposed between the bottom of the groove and the sliding ball. The opening of the groove is provided with a limiting part to prevent the sliding ball and the balls from falling out of the groove. The opening diameter of the limiting part is smaller than the sum of the diameter of the sliding ball and the diameter of the balls.

2. The prefabricated rectangular steel column auxiliary installation system according to claim 1, characterized in that: The U-shaped frame includes several horizontally arranged U-shaped skeletons and vertically arranged connecting angle steels. The several U-shaped skeletons are arranged along the height direction and connected by the connecting angle steels to form the whole U-shaped frame.

3. The prefabricated rectangular steel column auxiliary installation system according to claim 2, characterized in that: The rectangular frame includes a crossbeam and a column. A reinforcing crossbeam is provided inside the rectangular frame, and several fasteners are distributed on both the crossbeam and the reinforcing crossbeam.

4. The prefabricated rectangular steel column auxiliary installation system according to claim 2, characterized in that: The U-shaped frame is composed of three crossbeams, and each crossbeam has several fasteners.

5. A method for using a prefabricated rectangular steel column auxiliary installation system, characterized in that: The prefabricated rectangular steel column auxiliary installation system according to any one of claims 1 to 4 includes the following steps: S1. Hoist the U-shaped frame to the installation position of the lower rectangular steel column and temporarily fix it to the lower rectangular steel column using the fasteners on the lowest U-shaped frame. Then hoist the rectangular frame to the installation position and connect it to the connecting column of the rectangular frame with the connectors on the U-shaped frame to form the installation frame. Then tighten all the fasteners on the lower connection part and remove the tower crane hook. S2. Hoist the sliding steel plate and align its centerline with the top edge of the lower rectangular steel column. Place it between the installation frame and the lower rectangular steel column. When placing it, loosen the fastener on the lower end connection of the side wall until the sliding steel plate falls to the predetermined position. Then tighten the fastener on the lower end connection of the side wall to fix the sliding steel plate on that side. Then complete the installation of the sliding steel plates on the other side walls of the lower rectangular steel column. S3. Hoist the upper rectangular steel column and slowly and vertically send it into the upper part of the auxiliary installation system. The upper rectangular steel column corrects the positioning and verticality of the steel column during the sliding process through the sliding section on the sliding steel plate until it falls above the lower rectangular steel column. After tightening all the fasteners of the upper end connection of the installation frame, remove the tower crane hook to achieve the fixation between the upper and lower rectangular steel columns. S4. Unscrew the fasteners at the upper end of the side wall of the upper rectangular steel column, and slide the sliding steel plate until the joint between the upper and lower rectangular steel columns is exposed. Then tighten the fasteners at the middle and upper ends of the side wall to fix the sliding steel plate, and then perform welding at the joint. S5. After the welding work at the joint of the side wall is completed, unscrew the fasteners on the middle connection part and the upper connection part to allow the sliding steel plate to slide down and reset, and then tighten the fasteners on the lower connection part and the upper connection part. S6. Repeat steps S4 and S5 until all the joints on all sides of the rectangular steel column are welded. Then remove the auxiliary installation system and proceed with the connection work at the four corners of the upper and lower rectangular steel columns until the welds at the joints are full.

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