Large-span plant steel structure construction method

Abstract

The invention discloses a large-span plant steel structure construction method, and relates to the technical field of steel structure construction. The device comprises symmetrically-arranged main stand columns and a supporting beam fixedly connected to the tops of the two main stand columns, a plurality of side stand columns are symmetrically arranged on the two sides of the supporting beam, a top beam is installed at the tops of the side stand columns, and guiding assemblies and fixing assemblies used for fixing the top beam, the supporting beam and the side stand columns are installed at one ends of the main stand columns. Comprising the following steps that 1, various preparatory work before construction is conducted, and the preparatory work comprises the construction process and technology of pouring a foundation according to a drawing; 2, according to the principle of first middle and second outer side, the main stand columns and the side stand columns are hoisted to preset positions through high-precision hoisting equipment and perpendicularly connected with a foundation; and step 3, hoisting a top beam to the tops of the main upright posts and the side upright posts by using high-precision hoisting equipment according to the principle of'post-post-post-post-down-post-up '.

Description

Technical Field

[0001] The present application relates to the technical field of steel structure construction, and in particular to a method for constructing a large-span factory building steel structure. Background Art

[0002] Steel structure buildings have become an indispensable part of modern architecture due to their unique material properties, such as high strength, light weight and excellent overall stiffness. Especially in buildings that require large spans, super-high and super-heavy designs, steel structures have shown their unparalleled advantages. As a representative of this type of building, industrial plants have particularly strict requirements on structures, and steel structures can meet these requirements and become the preferred material for industrial plant construction.

[0003] At present, most of the construction methods for large-span factory steel structures are on-site installation. This method usually involves a large amount of hoisting operations, and it is necessary to hoist steel columns, steel beams and other components one by one to the predetermined position and combine them. Although this method can realize the construction of steel structures to a certain extent, its construction process is relatively cumbersome and requires precise measurement and positioning, which undoubtedly increases the difficulty and intensity of high-altitude operations for construction workers.

[0004] Although the existing construction method can realize the construction of large-span factory steel structures, it still has some obvious problems. Among them, the most prominent is the design of the top support structure. At present, the top of most steel structure factories relies on the top frame for oblique support. However, this support method has certain limitations in strength and cannot provide sufficient support for the overall steel structure of the factory, thus affecting the stability and durability of the factory. Summary of the invention

[0005] The purpose of this application is to solve the problem that the method of using a top frame for oblique support has certain limitations in strength and cannot provide sufficient support for the overall steel structure of the factory building, thereby affecting the stability and durability of the factory building. This application provides a large-span factory steel structure construction method.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions: A method for constructing a large-span factory building steel structure comprises symmetrically arranged main columns and a support beam fixedly connected to the top of the two main columns, a plurality of side columns are symmetrically arranged on both sides of the support beam, a top beam is installed on the top of the side column, and a guide assembly and a fixing assembly for fixing the top beam, the support beam and the side column are installed at one end of the main column, comprising the following steps: Step 1: Carry out various preparatory work before construction, including the construction process and technology of pouring the foundation according to the drawings; Step 2: According to the principle of "middle first, outer side later", use high-precision lifting equipment to lift the main column and side column to the preset position and connect them vertically to the foundation; Step 3: Then use high-precision lifting equipment to lift the top beam to the top of the main column and side column according to the principle of "column first, beam later, bottom first, top later"; Step 4: Use the theodolite to locate the top beam, and use the total station to check the coordinates to ensure installation accuracy; Step 5: Then cooperate with the guide assembly to pull the top beam to accurately align and position with the support beam and the side column, and finally use the fixing assembly to complete the fixed connection between the top beam, the support beam and the side column; Step 6: After the steel structure is installed, on-site welding and painting work will be carried out.

[0007] Furthermore, the guide assembly includes a plurality of fixed grooves symmetrically opened at one end of the support beam, one end of the top beam is fixedly connected with an insertion rod adapted to the fixed groove, one end of the insertion rod is symmetrically provided with positioning grooves, the inner side of the fixed groove is symmetrically provided with a receiving slide groove, the interior of the receiving slide groove is slidably connected with a positioning slider adapted to the positioning groove, one end of the positioning slider is fixedly connected with a positioning spring, and the positioning spring is installed inside the receiving slide groove.

[0008] By adopting the above technical scheme, by setting the coordinated use of the fixing component and the positioning groove, the receiving slide groove, the positioning slider and the positioning spring, when the top beam is pulled to drive the insertion rod to be inserted into the interior of the fixing groove, the rebound characteristic of the positioning spring is used to push the positioning slider to embed into the interior of the positioning groove, so that the insertion rod is clamped and fixed by the positioning groove and the positioning slider to achieve the guidance and pre-fixation of the top beam, and then the fixing component is used to achieve the fixation of the top beam, the support beam and the side column, so as to facilitate the coordinated use of the main column and the support beam, and to form a fixed support for the end of the two top beams that are in conflict with each other, effectively improving the support strength between the side column and the top beam, and improving the stability of the device.

[0009] Furthermore, the fixing assembly includes a fixing through hole 1 symmetrically opened at one end of the insertion rod, a fixing through hole 2 matched with the fixing through hole 1 is opened at one end of the support beam, a fixing bolt 1 is passed through the interior of the fixing through hole 1 and the fixing through hole 2, and a fixing nut 1 is threadedly connected to one end of the fixing bolt 1, a fixing through hole 3 is opened at one end of the side column, and a fixing through hole 4 is opened at one end of the top beam, a fixing through hole 2 is passed through the interior of the fixing through hole 3 and the fixing through hole 4, and a fixing nut 2 is threadedly connected to one end of the fixing bolt 2.

[0010] By adopting the above technical solution, by setting the coordinated use of fixing bolt one and fixing nut one, and fixing bolt two and fixing nut two, the pulling fixing bolt one and fixing bolt two are respectively passed through fixing through hole one, fixing through hole two, fixing through hole three, and fixing through hole four, and then the fixing nut one and fixing nut two are tightened, so that the top beam is respectively fixedly connected with the supporting beam and the side column, thereby effectively improving the practicability of the device.

[0011] Furthermore, guiding inclined surfaces are symmetrically arranged on the top of the fixing groove.

[0012] By adopting the above technical solution, the top opening area of ​​the fixing groove is effectively increased by setting the guiding inclined surface, the alignment efficiency of the insertion rod and the fixing groove is improved, and the practicality of the device is improved.

[0013] Furthermore, a sliding sleeve is provided at one end of the main column, and a supporting rod is symmetrically hinged at one end of the sliding sleeve, an auxiliary beam is symmetrically arranged on one side of the supporting beam, a plurality of fixing through-holes five adapted to the top beam are opened at one end of the auxiliary beam, a fixing through-hole eight adapted to the fixing through-hole five is opened at one end of the top beam, a fixing bolt three is penetrated inside the fixing through-hole five and the fixing through-hole eight, a fixing nut three is threadedly connected to one end of the fixing bolt three, a fixing through-hole six adapted to the supporting rod is opened at one end of the auxiliary beam, a fixing through-hole seven adapted to the fixing through-hole six is ​​opened at one end of the main column, a fixing bolt four is penetrated inside the fixing through-hole six and the fixing through-hole seven, a fixing nut four is threadedly connected to one end of the fixing bolt four, and an adjusting component for driving the sliding sleeve to move along the length direction of the main column is installed at one end.

[0014] By adopting the above technical scheme, by setting the coordinated use of the adjustment component and the support rod, it is convenient to pull the fixing bolt three through the fixing through-hole five and the fixing through-hole seven, and tighten the fixing nut three to achieve a fixed connection between the auxiliary beam and the top beam, and then drive the auxiliary beam to align the fixing through-hole seven with the fixing through-hole six by rotating the adjustment component, and pull the fixing bolt four through the fixing through-hole six and the fixing through-hole seven, and tighten the fixing nut four to complete the fixed connection between the support rod and the auxiliary beam, so as to facilitate driving the support rod to push the auxiliary beam to form a fixed support for the middle section of the top beam, thereby further improving the supporting strength and stability of the top beam.

[0015] Furthermore, the adjustment component includes an adjustment slot opened at one end of the main column, one end of the sliding sleeve is fixedly connected to an adjustment slider adapted to the adjustment slot, the interior of the adjustment slot is rotatably connected to an adjustment screw, the adjustment screw is threadedly connected to the adjustment slider, and one end of the adjustment screw is fixedly connected to an adjustment handle.

[0016] By adopting the above technical solution and arranging the coordinated use of the adjusting screw and the adjusting slider, it is convenient to drive the adjusting screw and the adjusting slider to be threadedly connected by turning the adjusting handle, and drive the sliding sleeve to move along the length direction of the main column, so that the sliding sleeve drives one end of the support rod to push out the resistance support for the auxiliary beam along the length direction of the main column, so as to facilitate the adjustment of the support angle of the support rod around the hinge axis according to the inclination angle of the two top beams, thereby effectively improving the support stability of the support rod.

[0017] Furthermore, a locking thread groove is provided at one end of the adjusting handle, and a locking nut is threadedly connected to one end of the adjusting handle through the locking thread groove.

[0018] By adopting the above technical solution, by setting the locking thread groove and the locking nut for use in combination, it is convenient to tighten the locking nut along the length direction of the locking thread groove to push it out and fix it against the main column, thereby achieving fixation of the adjusting screw and further improving the stability of the adjusting screw.

[0019] Furthermore, a mounting groove is formed at one end of the main column, and the adjustment handle is installed inside the mounting groove.

[0020] By adopting the above technical solution and by providing the installation groove and the coordinated use of the adjustment handle, the accidental touching of the adjustment handle by external force is effectively reduced, thereby improving the safety of the device.

[0021] In summary, the present application includes at least one of the following beneficial effects: 1. By setting the fixing component and the coordinated use of the positioning groove, the receiving slide groove, the positioning slider and the positioning spring, when the top beam is pulled to drive the insertion rod to be inserted into the interior of the fixing groove, the rebound characteristic of the positioning spring is used to push the positioning slider to be embedded in the interior of the positioning groove, so that the insertion rod is clamped and fixed by the positioning groove and the positioning slider to achieve the guidance and pre-fixation of the top beam, and then the fixing component is used to achieve the fixation of the top beam, the support beam and the side column, so as to facilitate the coordinated use of the main column and the support beam, and to form a fixed support for the end of the two top beams that are in conflict with each other, effectively improving the support strength between the side column and the top beam, and improving the stability of the device.

[0022] 2. By setting the coordinated use of the adjustment component and the support rod, it is convenient to pull the fixing bolt three through the fixing through-hole five and the fixing through-hole seven, and tighten the fixing nut three to achieve a fixed connection between the auxiliary beam and the top beam, and then drive the auxiliary beam to align the fixing through-hole seven with the fixing through-hole six by rotating the adjustment component, and pull the fixing bolt four through the fixing through-hole six and the fixing through-hole seven, and tighten the fixing nut four to complete the fixed connection between the support rod and the auxiliary beam, so as to facilitate driving the support rod to push the auxiliary beam to form a fixed support for the middle section of the top beam, thereby further improving the supporting strength and stability of the top beam.

[0023] 3. By setting the coordinated use of the adjusting screw and the adjusting slider, it is convenient to drive the adjusting screw and the adjusting slider to be threadedly connected by turning the adjusting handle, and drive the sliding sleeve to move along the length direction of the main column, so that the sliding sleeve drives one end of the support rod to push out the support against the auxiliary beam along the length direction of the main column, so as to facilitate the adjustment of the support angle of the support rod around the hinge axis according to the inclination angle of the two top beams, thereby effectively improving the support stability of the support rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the device body in this application.

[0025] Figure 2 It is a schematic diagram of the connection relationship between the top beam, support beam and side columns in this application.

[0026] Figure 3 It is an exploded view of the internal structure of the storage chute in this application.

[0027] Figure 4 It is a partial structural exploded diagram of the device body in this application.

[0028] Description of reference numerals: 1. Main column; 2. Support beam; 3. Side column; 4. Top beam; 5. Fixing slot; 6. Insertion rod; 7. Positioning slot; 8. Storage slide slot; 9. Positioning slide block; 10. Positioning spring; 11. Fixing through hole 1; 12. Fixing through hole 2; 13. Fixing bolt 1; 14. Fixing nut 1; 15. Fixing through hole 3; 16. Fixing through hole 4; 17. Fixing bolt 2; 18. Fixing nut 2; 19. Guide slope; 20. Sliding sleeve; 21. Support rod; 22. Auxiliary beam; 23. Fixed through hole five; 24. Fixed bolt three; 25. Fixed nut three; 26. Fixed through hole six; 27. Fixed through hole seven; 28. Fixed bolt four; 29. ​​Fixed nut four; 30. Adjusting slide groove; 31. Adjusting slider; 32. Adjusting screw; 33. Adjusting handle; 34. Locking thread groove; 35. Locking nut; 36. Mounting groove; 37. Fixed through hole eight. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-4 This application is described in further detail.

[0030] The embodiment of the present application discloses a method for constructing a large-span factory building steel structure.

[0031] Reference Figure 1-Figure 2A method for constructing a large-span factory steel structure includes symmetrically arranged main columns 1 and support beams 2 fixedly connected to the tops of the two main columns 1, a plurality of side columns 3 are symmetrically arranged on both sides of the support beam 2, a top beam 4 is installed on the top of the side columns 3, and a guide component and a fixing component for fixing the top beam 4, the support beam 2, and the side columns 3 are installed at one end of the main column 1, including the following steps: Step 1: Carry out various preparatory work before construction, including the construction process and technology of pouring the foundation according to the drawings; Step 2: According to the principle of "middle first, outer side later", use high-precision lifting equipment to lift the main column 1 and the side column 3 to the preset position and connect them vertically to the foundation; Step 3: Then use high-precision lifting equipment to lift the top beam 4 to the top of the main column 1 and the side column 3 according to the principle of "column first, beam later, bottom first, top later"; Step 4: Use the theodolite to locate the top beam 4, and use the total station to check the coordinates to ensure installation accuracy; Step 5, then cooperate with the guide component to pull the top beam 4 to accurately align and position with the support beam 2 and the side column 3, and finally use the fixing component to complete the fixed connection between the top beam 4, the support beam 2 and the side column 3; Step 6: After the steel structure is installed, on-site welding and painting work will be carried out.

[0032] Reference Figure 2-Figure 4 The guide assembly includes a plurality of fixed grooves 5 symmetrically opened at one end of the support beam 2, an insertion rod 6 adapted to the fixed groove 5 is fixedly connected to one end of the top beam 4, a positioning groove 7 is symmetrically opened at one end of the insertion rod 6, a receiving slide groove 8 is symmetrically opened on the inner side of the fixed groove 5, a positioning slider 9 adapted to the positioning groove 7 is slidably connected inside the receiving slide groove 8, a positioning slider 9 is fixedly connected to one end of the positioning slider 9, and the positioning spring 10 is installed inside the receiving slide groove 8; Among them, the fixing assembly includes a fixing through hole 11 symmetrically opened at one end of the insertion rod 6, a fixing through hole 12 matched with the fixing through hole 11 is opened at one end of the support beam 2, a fixing bolt 13 is penetrated inside the fixing through hole 11 and the fixing through hole 12, and a fixing nut 14 is threadedly connected to one end of the fixing bolt 13, a fixing through hole 3 15 is opened at one end of the side column 3, and a fixing through hole 4 16 is opened at one end of the top beam 4, a fixing bolt 2 17 is penetrated inside the fixing through hole 3 15 and the fixing through hole 4 16, and a fixing nut 2 18 is threadedly connected to one end of the fixing bolt 2 17; Furthermore, a guiding inclined surface 19 is symmetrically arranged on the top of the fixing groove 5 .

[0033] When in use, first, after the main column 1 and the side column 3 are fixed to the foundation, the top beam 4 is hoisted and moved to the top of the support beam 2, and the top beam 4 is driven to drive the insertion rod 6 to slowly move into the inside of the fixing groove 5. At the same time, the insertion range of the top of the fixing groove 5 is effectively increased by setting the guiding slope 19. Then, after the bottom of the insertion rod 6 is in conflict with the guiding slope 19, it slides into the inside of the fixing groove 5 along the guiding direction of the guiding slope 19. At the same time, the weight of the top beam 4 is used to drive the insertion rod 6 to squeeze one end of the positioning slide block 9, thereby When the insertion rod 6 is inserted between the two positioning slide blocks 9, the positioning slide block 9 is pushed by the insertion rod 6 to squeeze the positioning spring 10 to produce a contraction deformation, and at the same time retract into the interior of the receiving slide groove 8. When the insertion rod 6 is completely inserted into the interior of the fixing groove 5 and the positioning groove 7 is aligned with the positioning slide block 9, the positioning spring 10 is caused to rebound and push the positioning slide block 9 along the length direction of the receiving slide groove 8 to be inserted into the interior of the positioning groove 7, so that one end of the insertion rod 6 is fixed by the clamping connection between the positioning groove 7 and the positioning slide block 9, so as to improve the stability of the top beam 4; Then, by manually pulling one end of the fixing bolt 13 through the fixing through-hole 2 12 and the fixing through-hole 11, and by tightening the fixing nut 14, the fixing nut 14 is made to form a fixed conflict with the support beam 2 along the length direction of the fixing bolt 13 to complete the fixation between the top beam 4 and the support beam 2. At the same time, by pulling the fixing bolt 2 17 through the fixing through-hole 4 16 and the fixing through-hole 3 15, and by tightening the fixing nut 2 18, it moves along the length direction of the fixing bolt 2 17, and then the fixing nut 2 18 is made to form a fixed conflict with one end of the side column 3, thereby realizing the fixation of the top beam 4 to the support beam 2 and the side column 3, so as to facilitate the coordinated use of the main column 1 and the support beam 2, and to form a fixed support for the ends of the two top beams 4 that conflict with each other, effectively improving the supporting strength between the side column 3 and the top beam 4, and improving the stability of the device.

[0034] Reference Figure 2-Figure 4A sliding sleeve 20 is provided at one end of the main column 1, and a support rod 21 is symmetrically hinged at one end of the sliding sleeve 20. An auxiliary beam 22 is symmetrically arranged on one side of the support beam 2. A plurality of fixed through holes 5 23 matching with the top beam 4 are provided at one end of the auxiliary beam 22. A fixed through hole 8 37 matching with the fixed through hole 5 23 is provided at one end of the top beam 4. A fixing bolt 3 24 is penetrated inside the fixing through hole 5 23 and the fixing through hole 8 37. A fixing nut 3 25 is threadedly connected to one end of the fixing bolt 3 24. A fixing through hole 6 26 matching with the support rod 21 is provided at one end of the auxiliary beam 22. A fixing through hole 7 27 matching with the fixing through hole 6 26 is provided at one end of the main column 1. A fixing bolt 4 28 is penetrated inside the fixing through hole 6 26 and the fixing through hole 7 27. A fixing nut 4 29 is threadedly connected to one end of the fixing bolt 4 28. An adjusting component for driving the sliding sleeve 20 to move along the length direction of the main column 1 is installed at one end of the main column 1. The adjusting assembly includes an adjusting slot 30 provided at one end of the main column 1, an adjusting slider 31 adapted to the adjusting slot 30 is fixedly connected to one end of the sliding sleeve 20, an adjusting screw 32 is rotatably connected inside the adjusting slot 30, the adjusting screw 32 is threadedly connected to the adjusting slider 31, and an adjusting handle 33 is fixedly connected to one end of the adjusting screw 32; Furthermore, a locking thread groove 34 is provided at one end of the adjustment handle 33, and a locking nut 35 is threadedly connected to one end of the adjustment handle 33 through the locking thread groove 34; Furthermore, a mounting groove 36 is formed at one end of the main column 1 , and the adjustment handle 33 is installed inside the mounting groove 36 .

[0035] When in use, after the top beam 4 is fixed to the support beam 2 and the side column 3, the auxiliary beam 22 is hoisted to move closer to the middle section of the top beam 4, and the fixing through hole 5 23 is driven to align with the fixing through hole 8 37, and then the fixing bolt 3 24 is pulled through the fixing through hole 5 23 and the fixing through hole 7 27, and the fixing nut 3 25 is tightened, so that the fixing nut 3 25 forms a fixed conflict with the top beam 4 along the length direction of the fixing bolt 3 24, so that a fixed connection is formed between the auxiliary beam 22 and the top beam 4; Then, the fixing of the adjusting screw 32 is released by loosening the locking nut 35, and the adjusting handle 33 is turned to drive the adjusting screw 32 to form a threaded connection with the adjusting slider 31, and at the same time, the adjusting slider 31 is driven to drive the sliding sleeve 20 to move along the length direction of the adjusting slide groove 30, so that the pulling support rod 21 drives the fixing through hole 7 27 to align with the fixing through hole 6 26, and then the locking nut 35 is tightened so that the locking nut 35 is pushed out and fixedly abutted against the main column 1 along the length direction of the locking thread groove 34, thereby fixing the adjusting screw 32; Then, the fixing bolt four 28 is manually pulled through the fixing through hole six 26 and the fixing through hole seven 27, and the fixing nut four 29 is tightened, so that the fixing nut four 29 forms a fixed abutment with the auxiliary beam 22 along the length direction of the fixing bolt four 28, thereby completing the fixed connection between the support rod 21 and the auxiliary beam 22, thereby facilitating driving the support rod 21 to push the auxiliary beam 22 to form a fixed support for the middle section of the top beam 4, thereby further improving the supporting strength and stability of the top beam 4.

[0036] The implementation principle of the large-span factory steel structure construction method of this embodiment is as follows: first, after the main column 1 and the side column 3 are fixed to the foundation, the top beam 4 is hoisted and moved to the top of the support beam 2, and the top beam 4 is driven to drive the insertion rod 6 to slowly move into the inside of the fixing groove 5. At the same time, the insertion range of the top of the fixing groove 5 is effectively increased by setting the guiding slope 19. Then, after the bottom of the insertion rod 6 is in conflict with the guiding slope 19, it slides into the inside of the fixing groove 5 along the guiding direction of the guiding slope 19, and at the same time, the weight of the top beam 4 is used to drive the insertion rod 6 to One end of the positioning slider 9 is squeezed, so that when the insertion rod 6 is inserted between the two positioning sliders 9, the positioning slider 9 is pushed by the insertion rod 6 to squeeze the positioning spring 10 to produce a contraction deformation, and at the same time retract into the inside of the receiving slide groove 8, and when the insertion rod 6 is completely inserted into the inside of the fixing groove 5 and the positioning groove 7 is aligned with the positioning slider 9, the positioning spring 10 is caused to rebound and deform, and the positioning slider 9 is pushed to be inserted into the inside of the positioning groove 7 along the length direction of the receiving slide groove 8, so that one end of the insertion rod 6 is fixed by the clamping of the positioning groove 7 and the positioning slider 9; Then, one end of the fixing bolt 13 is manually pulled through the fixing through-hole 2 12 and the fixing through-hole 1 11, and the fixing nut 14 is tightened so that the fixing nut 14 forms a fixed conflict with the support beam 2 along the length direction of the fixing bolt 13, so as to complete the fixation between the top beam 4 and the support beam 2. At the same time, the fixing bolt 2 17 is pulled through the fixing through-hole 4 16 and the fixing through-hole 3 15, and the fixing nut 2 18 is tightened so that it moves along the length direction of the fixing bolt 2 17, and then the fixing nut 2 18 forms a fixed conflict with one end of the side column 3, so as to achieve the fixation of the top beam 4 to the support beam 2 and the side column 3; Then, the auxiliary beam 22 is hoisted to move closer to the middle section of the top beam 4, and the fixing through hole 5 23 is aligned with the fixing through hole 8 37, and then the fixing bolt 3 24 is pulled through the fixing through hole 5 23 and the fixing through hole 7 27, and the fixing nut 3 25 is tightened, so that the fixing nut 3 25 forms a fixed conflict with the top beam 4 along the length direction of the fixing bolt 3 24; Then, by turning the adjusting handle 33, the adjusting screw 32 is driven to form a threaded connection with the adjusting slider 31, and at the same time, the adjusting slider 31 is driven to drive the sliding sleeve 20 to move along the length direction of the adjusting slide groove 30, so as to pull the support rod 21 to drive the fixed through hole 7 27 to align with the fixed through hole 6 26, and then manually pull the fixing bolt 4 28 through the fixed through hole 6 26 and the fixed through hole 7 27, and tighten the fixing nut 4 29, so that the fixing nut 4 29 forms a fixed conflict with the auxiliary beam 22 along the length direction of the fixing bolt 4 28, thereby completing the fixed connection between the support rod 21 and the auxiliary beam 22.

Claims

1. A method for constructing a steel structure of a large-span factory building, comprising symmetrically arranged main columns (1) and a support beam (2) fixedly connected to the top of the two main columns (1), a plurality of side columns (3) symmetrically arranged on both sides of the support beam (2), a top beam (4) installed on the top of the side column (3), and a guide component and a fixing component for fixing the top beam (4) to the support beam (2) and the side column (3) installed at one end of the main column (1), characterized in that: The steps include: Step 1: Carry out various preparatory work before construction, including the construction process and technology of pouring the foundation according to the drawings; Step 2: According to the principle of "middle first, outer side later", use high-precision lifting equipment to lift the main column (1) and the side column (3) to the preset position and connect them vertically to the foundation; Step 3, then use high-precision lifting equipment to lift the top beam (4) to the top of the main column (1) and the side column (3) according to the principle of "column first, beam later, bottom first, top later"; Step 4: Use a theodolite to locate the top beam (4), and use a total station to check the coordinates to ensure installation accuracy; Step 5, then cooperate with the guide component to pull the top beam (4) to accurately align and position with the support beam (2) and the side column (3), and finally use the fixing component to complete the fixed connection between the top beam (4) and the support beam (2) and the side column (3); Step 6: After the steel structure is installed, on-site welding and painting work will be carried out.

2. A method for constructing a large-span factory building steel structure according to claim 1, characterized in that: The guide assembly comprises a plurality of fixed grooves (5) symmetrically arranged at one end of the support beam (2); an insertion rod (6) adapted to the fixed groove (5) is fixedly connected to one end of the top beam (4); a positioning groove (7) is symmetrically arranged at one end of the insertion rod (6); a receiving slide groove (8) is symmetrically arranged on the inner side of the fixed groove (5); a positioning slider (9) adapted to the positioning groove (7) is slidably connected inside the receiving slide groove (8); a positioning spring (10) is fixedly connected to one end of the positioning slider (9); and the positioning spring (10) is installed inside the receiving slide groove (8).

3. The method for constructing a large-span factory building steel structure according to claim 1, characterized in that: The fixing assembly comprises a fixing through hole (11) symmetrically arranged at one end of the insertion rod (6); a fixing through hole (12) adapted to the fixing through hole (11) is arranged at one end of the support beam (2); a fixing bolt (13) is inserted into the inside of the fixing through hole (11) and the fixing through hole (12); one end of the fixing bolt (13) is threadedly connected to a fixing nut (14); a fixing through hole (3) is arranged at one end of the side column (3); a fixing through hole (4) is arranged at one end of the top beam (4); a fixing through hole (17) is inserted into the inside of the fixing through hole (15) and the fixing through hole (16); one end of the fixing bolt (17) is threadedly connected to a fixing nut (18).

4. A method for constructing a large-span factory building steel structure according to claim 2, characterized in that: The top of the fixing groove (5) is symmetrically provided with guiding inclined surfaces (19).

5. The method for constructing a large-span factory building steel structure according to claim 1, characterized in that: A sliding sleeve (20) is provided on one end of the main column (1), and a support rod (21) is symmetrically hinged on one end of the sliding sleeve (20). An auxiliary beam (22) is symmetrically provided on one side of the support beam (2). A plurality of fixing through holes (23) matching the top beam (4) are provided on one end of the auxiliary beam (22). A fixing through hole (37) matching the fixing through hole (23) is provided on one end of the top beam (4). A fixing bolt (24) is provided inside the fixing through hole (23) and the fixing through hole (37). One end of the fixing bolt (24) is threadedly connected to the fixing through hole (23). A fixing nut three (25) is connected, one end of the auxiliary beam (22) is provided with a fixing through hole six (26) adapted to the support rod (21), one end of the main column (1) is provided with a fixing through hole seven (27) adapted to the fixing through hole six (26), the insides of the fixing through hole six (26) and the fixing through hole seven (27) are provided with a fixing bolt four (28), one end of the fixing bolt four (28) is threadedly connected with a fixing nut four (29), and one end of the main column (1) is installed with an adjustment component for driving the sliding sleeve (20) to move along the length direction of the main column (1).

6. A method for constructing a large-span factory building steel structure according to claim 5, characterized in that: The adjustment assembly comprises an adjustment slot (30) provided at one end of the main column (1); an adjustment slider (31) adapted to the adjustment slot (30) is fixedly connected to one end of the slide sleeve (20); an adjustment screw (32) is rotatably connected inside the adjustment slot (30); the adjustment screw (32) is threadedly connected to the adjustment slider (31); and an adjustment handle (33) is fixedly connected to one end of the adjustment screw (32).

7. A method for constructing a large-span factory building steel structure according to claim 6, characterized in that: One end of the adjustment handle (33) is provided with a locking thread groove (34), and one end of the adjustment handle (33) is threadedly connected to a locking nut (35) via the locking thread groove (34).

8. The method for constructing a large-span factory building steel structure according to claim 7, characterized in that: One end of the main column (1) is provided with a mounting groove (36), and the adjustment handle (33) is mounted inside the mounting groove (36).

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