Large-span steel structure building construction quality supervision control method

Abstract

The invention discloses a large-span steel structure building construction quality supervision control method. The method comprises the following steps: S1, welding seam quality acceptance; s2, when the quality of the welding seam A does not meet the design requirement and the specification standard, the welding seam quality defect position is treated, upper chords of every two adjacent steel structure grid units are cut, and a cutting position B and a cutting position C are formed; s3, the cutting position B and the cutting position C of the upper chord are ground to be flat, and then a rod piece is manufactured; and S4, a control device is installed between an upper chord member and a lower chord member of the steel structure net rack unit, then the rod piece is arranged in the notch, the rod piece is fixed through the control device, the rod piece is positioned in the notch, then the end of the rod piece and the cutting position B are welded and fixed, the end of the rod piece and the cutting position C are welded and fixed, and then the control device is dismantled. The welding seam quality defect can be treated, the welding seam which does not meet the design requirement and the specification standard is eliminated, the connection strength between the two net rack units is guaranteed, and construction safety is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of steel structure construction, and in particular relates to a method for quality supervision and control of large-span steel structure construction. Background Art

[0002] A large-span steel structure building refers to a steel structure building with a relatively large span, which is mainly composed of beams, columns, trusses and other components made of steel sections and steel plates to form a load-bearing structure.

[0003] The steel of large-span steel structure buildings has high strength and elastic modulus, and the material is uniform, which makes the steel structure have good plasticity and toughness, high precision and easy installation. Large-span steel structure buildings have high seismic resistance. The tensile and bending resistance of steel enables it to absorb seismic energy through deformation and bending when an earthquake occurs, reducing damage to the building. At the same time, large-span steel structure buildings will hardly generate construction waste when they are demolished, and the steel can be recycled and reused, which is in line with the concept of sustainable development. Moreover, steel structure components can be prefabricated in the factory and then transported to the site for installation, which greatly shortens the construction period.

[0004] Large-span steel structure buildings play an irreplaceable role in modern architecture with their unique advantages and wide application fields. With the continuous advancement and innovation of technology, large-span steel structure buildings will continue to play an important role in the future construction industry.

[0005] The existing large-span steel structure building is composed of grid units, and the chords of two adjacent grid units are welded and fixed.

[0006] After the welding of the grid unit is completed, the steel structure building needs to be supervised and controlled for construction quality. The control of steel structure construction quality supervision is a systematic work, involving three stages: before, during and after. Among them, in-process control is the core of steel structure engineering supervision, involving various supervision and management work during the construction process. It includes welding quality control: quality acceptance of the welds between the chords, including inspection of external dimensions, surface quality and internal defects.

[0007] If the quality of the weld does not meet the design requirements and specification standards, such as the chord is misaligned or deformed at the welding position, it will affect the connection strength between the two truss units and pose a safety hazard. Summary of the invention

[0008] The purpose of the present invention is to solve the above-mentioned technical problems existing in the prior art and to provide a large-span steel structure construction quality supervision and control method, which can deal with weld quality defects, eliminate welds that do not meet design requirements and specification standards, ensure the connection strength between two grid units, and ensure construction safety.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0010] The method for quality supervision and control of large-span steel structure construction is characterized by comprising the following steps:

[0011] S1. Carry out weld quality inspection on the welds of two adjacent steel structure grid units, and mark the welds as weld A.

[0012] S2. When the quality of weld A does not meet the design requirements and specification standards, the weld quality defects are processed by cutting the upper chords of two adjacent steel structure grid units to form cutting positions B and C, where weld A is located between cutting positions B and C, and the cutting section formed by cutting positions B and C is taken out, so that a gap is formed between cutting positions B and C.

[0013] S3, grinding the cutting position B of the upper chord rod, grinding the cutting position C of the upper chord rod, then calculating the distance D between the cutting position B and the cutting position C, and manufacturing the rod according to the distance D.

[0014] S4. Install a control device between the upper chord and the lower chord of the steel structure grid unit, then set the rod into the notch, use the control device to fix the rod, and position the rod in the notch. At this time, one end of the rod is aligned with the cutting position B, and the other end of the rod is aligned with the cutting position C. Then, weld and fix the end of the rod to the cutting position B, and weld and fix the end of the rod to the cutting position C at the same time, and then inspect the welds at the welding points. After passing the inspection, remove the control device.

[0015] Furthermore, the control device includes a fixed plate, a clamping mechanism 1, a clamping mechanism 2 and a clamping mechanism. The clamping mechanism 1 includes a clamping seat 1 and a clamping plate 1. The clamping seat 1 is installed on the fixed plate. The clamping seat 1 is provided with a threaded rod 1. The threaded rod 1 passes through a through hole 1 of the clamping plate 1. The threaded rod 1 is threadedly connected with a nut 1.

[0016] The clamping mechanism 2 includes a clamping seat 2, a clamping plate 2 and a clamping plate 3. The clamping seat 2 is installed on the fixed plate. The clamping seat 2 is provided with a rotating shaft, which passes through the through hole 2 of the clamping plate 2. The rotating shaft is threadedly connected with a nut 2. The clamping plate 2 is provided with a threaded rod 2, which passes through the through hole 3 of the clamping plate 3. The threaded rod 2 is threadedly connected with a nut 3.

[0017] The jacking mechanism includes an installation component, a clamping plate four and a jacking piece. The installation component is installed on a clamping seat one, and two clamping plates four are installed on the installation component. The jacking piece includes a jacking rod, a connecting plate and a jacking bolt. The jacking rod is arranged between the two clamping plates four, a fixing rod is provided between the grooves one of the two clamping plates four, a nut four is threadedly connected to the fixing rod, a connecting bolt is provided between the grooves two of the two clamping plates, a nut five is threadedly connected to the connecting bolt, the jacking rod passes through a through hole four of the connecting plate, the jacking rod is threadedly connected to two nuts six, the two nuts six clamp the connecting plate, and the jacking bolt is threadedly connected to the threaded hole of the connecting plate.

[0018] The operation of the control device fixing rod is:

[0019] (1) Install two clamping mechanisms 1 onto the fixing plates, remove the clamping plates 1 of the clamping mechanisms 1, install the two clamping plates 4 onto the mounting assembly, insert the fixing rods into the grooves 1 of the clamping plates 4, screw nuts 4 into both ends of the fixing rods, and then install the mounting assembly onto the clamping seat 1.

[0020] (2) The installation assembly of step (1) is hoisted to the steel structure grid unit. At this time, the clamping plate four and the notch are set correspondingly, and the top of the clamping seat one is attached to the upper chord rod of the steel structure grid unit. Then, the clamping plate one is installed on the threaded rod one, and then the nut one is tightened on the threaded rod one. At this time, the clamping plate one and the top of the clamping seat one clamp the upper chord rod.

[0021] (3) Install the clamping seat 2 on the fixed plate, and then rotate the clamping plate 2 on the rotating shaft so that the clamping plate 2 is attached to the lower chord of the steel structure grid unit. Then install the clamping plate 3 on the threaded rod 2, and then tighten the nut 3 on the threaded rod 2. At this time, the clamping plate 2 and the clamping plate 3 clamp the lower chord, and then tighten the nut 2 on the rotating shaft.

[0022] (4) By changing the positions of the two nuts (6) on the tightening rod, adjust the position of the connecting plate on the tightening rod, insert the fixing rod between the grooves (1) of the two clamping plates (4), screw the nut (4) onto the fixing rod, extend the tightening rod between the two clamping plates, support the tightening rod on the fixing rod, insert the connecting bolt between the grooves (2) of the two clamping plates, and screw the nut (5) onto the connecting bolt.

[0023] (5) Set the rod into the notch, then move the tension rod so that it presses against the rod, then adjust the height of the connecting bolt so that it presses against the tension rod, then tighten the nut five, the connecting bolt and the fixing rod limit the tension rod, then tighten the nut four, the two clamping plates four clamp the tension rod, then turn the tension bolt, the tension bolt presses against the rod, so that the tension rod and the tension bolt fix the rod, and position the rod in the notch.

[0024] Furthermore, notches 1 are provided at both ends of the fixing plate, and a limiting column 1 is provided at the bottom of the clamping seat 1, the limiting column 1 passes through the notch 1, and the limiting column 1 is threadedly connected with a nut 7. When the clamping seat 1 is installed on the fixing plate, the limiting column 1 is moved in the notch 1 along the length direction of the fixing plate, and the position of the clamping seat 1 on the fixing plate is adjusted so that the clamping mechanism 1 can clamp the upper chord rod, and then the nut 7 is tightened so that the clamping seat 1 is fixed on the fixing plate.

[0025] Furthermore, the mounting assembly includes a sliding track and a slider, the slider moves along the length direction of the fixed plate on the sliding track, the clamping plate 4 is clamped on the slider, the slider is threadedly connected with a fixing bolt, the clamping seat 1 is provided with a cylinder, the cylinder is provided with a piston rod, and the sliding track is provided with a mounting plate. When the mounting assembly is installed on the clamping seat 1, a nut 8 is screwed into the piston rod of the cylinder, and then the mounting plate of the sliding track is passed through the through hole 5 of the clamping seat 1. At this time, the limiting groove of the sliding track is clamped on the limiting protrusion of the clamping seat 1, and then the sliding track is moved up and down on the clamping seat 1, so that the piston rod passes through the through hole 6 of the mounting plate, and the mounting plate is supported on the nut 8, and then another nut 8 is screwed into the piston rod of the cylinder, and the nut 8 is tightened, so that the two nuts 8 fix the mounting plate, and then the slider is moved along the length direction of the fixed plate on the sliding track, and the position of the clamping plate 4 is adjusted. After the adjustment is completed, the fixing bolt is screwed so that the fixing bolt is tightened on the sliding track.

[0026] Further, the slider is welded with a support plate, the support plate is threadedly connected with a support rod, and the support rod is threadedly connected with a disc. After the fixing rod is inserted between the grooves 1 of the two clamping plates 4, the support rod is twisted so that the support plate supports the connecting plate.

[0027] Furthermore, the fixing plate is provided with a through hole 7, and a limiting column 2 is provided at the bottom of the clamping seat 2, the limiting column 2 passes through the through hole 7, and the limiting column 2 is threadedly connected with a nut 9. When the clamping seat 2 is installed on the fixing plate, the limiting column 2 is moved in the through hole 7 along the length direction of the fixing plate, and the position of the clamping seat 2 on the fixing plate is adjusted so that the clamping mechanism 2 can clamp the lower chord rod, and then the nut 9 is tightened so that the clamping seat 2 is fixed on the fixing plate.

[0028] Furthermore, after the control device is removed, a reinforcement block is welded between the rod and the upper chord, and the reinforcement block is arranged at the welding point between the end of the rod and the cutting position B, while another reinforcement block is arranged at the welding point between the end of the rod and the cutting position C.

[0029] Furthermore, after the reinforcement block is welded, anti-corrosion paint is sprayed on the end of the rod and the welding position of the cutting position B, and anti-corrosion paint is sprayed on the end of the rod and the welding position of the cutting position C, and anti-corrosion paint is sprayed on the reinforcement block at the same time.

[0030] The present invention has the following beneficial effects due to the adoption of the above technical solution:

[0031] The present invention cuts the upper chord rod, and the cutting position is located at the left and right sides of the weld that does not meet the design requirements and the standard specifications. When the cutting is completed, the steel structure of the weld that does not meet the design requirements and the standard specifications is taken out, and a gap is formed between the two cutting positions, and then a rod is welded in the gap, and the specification of the rod is consistent with the specification of the upper chord rod. When welding the rod, the original steel structure grid unit is used to position the rod in the gap through a control device, so as to ensure the accuracy of the welding position of the rod, improve the welding quality, and make the newly formed weld meet the design requirements and the standard specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below in conjunction with the accompanying drawings:

[0033] Figure 1 Schematic diagram of the structure of the clamping plate 4 in the present invention;

[0034] Figure 2 It is a structural schematic diagram of the present invention when the fixing rod is installed in the groove 1 of the two clamping plates 4;

[0035] Figure 3 It is a structural schematic diagram of the sliding track in the present invention;

[0036] Figure 4 It is a structural schematic diagram of the connection between the slider and the sliding track in the present invention;

[0037] Figure 5 It is a structural schematic diagram of the clamping mechanism of the present invention when the clamping plate is removed;

[0038] Figure 6 It is a structural schematic diagram of the connection between the fixing plate and the clamping seat in the present invention;

[0039] Figure 7 It is a structural schematic diagram of the connection between the mounting assembly and the clamping seat in the present invention;

[0040] Figure 8 It is a structural schematic diagram of the present invention when the upper chords of two adjacent steel structure grid units are cut;

[0041] Fig. 9 This is a structural schematic diagram of the present invention in which the installation assembly is suspended and placed on the steel structure grid unit;

[0042] Fig.10 It is a schematic structural diagram of the top clamping upper chord rod of the clamping plate 1 and the clamping seat 1 in the present invention;

[0043] Fig.11 It is a schematic diagram of the structure of the clamping plate 2 and the clamping plate 3 clamping the lower chord in the present invention;

[0044] Fig.12 It is a structural schematic diagram of the clamping mechanism 2 in the present invention;

[0045] Fig.13 It is a structural schematic diagram of the present invention when the connecting bolt is installed between the grooves 2 of the two clamping plates;

[0046] Fig.14 It is a structural schematic diagram of the tensioning member in the present invention;

[0047] Fig.15 It is a structural schematic diagram of the connection bolts and the fixing rods installed on the clamping plate 4 in the present invention;

[0048] Fig.16 It is a schematic diagram of the structure of the clamping rod and the clamping bolt fixing the rod in the present invention;

[0049] Fig.17 The figure is a schematic diagram of the structure of welding a reinforcement block between a rod and an upper chord rod according to the present invention.

[0050] In the figure, 1-steel structure grid unit; 2-upper chord rod; 3-lower chord rod; 4-clamping plate four; 5-groove one; 6-groove two; 7-slider; 8-fixing rod; 9-nut four; 10-support plate; 11-sliding track; 12-limiting groove; 13-mounting plate; 14-fixing bolt; 15-lifting ear; 16-support rod; 17-disc; 18-clamping seat one; 19-threaded rod one; 20-limiting column one; 21-nut seven; 22-cylinder; 23-piston rod; 24-limiting protrusion; 25-through hole Five; 26-fixed plate; 27-slot one; 28-nut eight; 29-through hole seven; 30-clamping plate one; 31-nut one; 32-clamping plate two; 33-clamping plate three; 34-threaded rod two; 35-clamping seat two; 36-rotating shaft; 37-nut two; 38-limiting column two; 39-nut nine; 40-nut three; 41-tension rod; 42-nut six; 43-tension bolt; 44-connecting bolt; 45-nut five; 46-rod; 47-reinforcement block; 48-notch; 49-connecting plate. DETAILED DESCRIPTION

[0051] like Figures 1 to 17 As shown, the construction quality supervision and control method of a large-span steel structure building of the present invention comprises the following steps:

[0052] S1. Perform weld quality inspection on the welds of two adjacent steel structure grid units 1, and mark the welds as weld A.

[0053] S2. When the quality of weld A does not meet the design requirements and specification standards, the weld quality defects are processed, and the upper chord rods 2 of two adjacent steel structure grid units 1 are cut to form cutting positions B and cutting positions C, wherein weld A is located between cutting positions B and cutting positions C, and the cutting section formed by cutting positions B and cutting positions C is taken out, and cutting positions B and cutting positions C form a gap 48.

[0054] S3, grinding the cutting position B of the upper chord rod 2, grinding the cutting position C of the upper chord rod 2, then calculating the distance D between the cutting position B and the cutting position C, and manufacturing the rod according to the distance D.

[0055] S4. Install a control device between the upper chord 2 and the lower chord of the steel structure grid unit 1, and then set the rod 46 into the notch 48. Use the control device to fix the rod 46 and position the rod 46 in the notch 48. At this time, one end of the rod 46 is aligned with the cutting position B, and the other end of the rod 46 is aligned with the cutting position C. Then, the end of the rod 46 is welded and fixed to the cutting position B, and the other end of the rod 46 is welded and fixed to the cutting position C. Then, perform a weld inspection on the welded joint. After passing the inspection, remove the control device.

[0056] S5. After the control device is removed, a reinforcement block 47 is welded between the rod 46 and the upper chord rod 2. The reinforcement block 47 is arranged at the welding point between the end of the rod 46 and the cutting position B. At the same time, another reinforcement block 47 is arranged at the welding point between the end of the rod 46 and the cutting position C to increase the connection strength between the rod 46 and the upper chord rod 2.

[0057] S6. After the welding of the reinforcing block 47 is completed, anti-corrosion paint is sprayed on the end of the rod 46 and the welding position of the cutting position B. At the same time, anti-corrosion paint is sprayed on the end of the rod 46 and the welding position of the cutting position C. At the same time, anti-corrosion paint is sprayed on the reinforcing block 47 to protect the welding position.

[0058] Based on the structure of the above embodiment, the present invention specifically designs the structure of the control device:

[0059] The control device includes a fixing plate 26, a clamping mechanism 1, a clamping mechanism 2 and a clamping mechanism.

[0060] The clamping mechanism 1 includes a clamping seat 18 and a clamping plate 30. The clamping seat 18 is installed on the fixing plate 26. The clamping seat 18 is provided with a threaded rod 19. The threaded rod 19 passes through a through hole 1 of the clamping plate 30. The threaded rod 19 is threadedly connected with a nut 31.

[0061] The clamping mechanism 2 includes a clamping seat 2 35, a clamping plate 2 32 and a clamping plate 33. The clamping seat 2 35 is mounted on the fixing plate 26. The clamping seat 2 35 is provided with a rotating shaft 36. The rotating shaft 36 passes through the through hole 2 of the clamping plate 2 32. The rotating shaft 36 is threadedly connected with a nut 2 37. The clamping plate 2 32 is provided with a threaded rod 2 34. The threaded rod 2 34 passes through the through hole 3 of the clamping plate 3 33. The threaded rod 2 34 is threadedly connected with a nut 3 40.

[0062] The tightening mechanism includes a mounting assembly, a clamping plate 44 and a tightening member. The mounting assembly is mounted on a clamping seat 18, and two clamping plates 44 are mounted on the mounting assembly. The tightening member includes a tightening rod 41, a connecting plate 49 and a tightening bolt 43. The tightening rod 41 is arranged between the two clamping plates 44, a fixing rod is provided between the grooves 1 of the two clamping plates 44, a nut 4 is threadedly connected to the fixing rod, a connecting bolt is provided between the grooves 2 of the two clamping plates, a nut 5 is threadedly connected to the connecting bolt, the tightening rod 41 passes through a through hole 4 of the connecting plate 49, the tightening rod 41 is threadedly connected to two nuts 6, the two nuts 6 clamp the connecting plate 49, and the tightening bolt 43 is threadedly connected to the threaded hole of the connecting plate 49.

[0063] The operation of the control device fixing rod 46 is:

[0064] (1) Install two clamping mechanisms 1 on the fixed plate 26: notches 127 are provided at both ends of the fixed plate 26, and a limiting column 20 is provided at the bottom of the clamping seat 18. The limiting column 20 passes through the notches 127, and the limiting column 20 is threadedly connected with a nut 7 21. When the clamping seat 18 is installed on the fixed plate 26, the limiting column 20 is moved in the notch 127 along the length direction of the fixed plate 26, and the position of the clamping seat 18 on the fixed plate 26 is adjusted so that the clamping mechanism 1 can clamp the upper chord rod 2, and then the nut 7 21 is tightened so that the clamping seat 18 is fixed on the fixed plate 26. The installation position of the clamping mechanism 1 on the fixed plate 26 of the present invention can be adjusted, so that when the clamping mechanism 1 clamps the upper chord rod 2 in the later stage, the clamping mechanism 1 can avoid the web rod welded on the upper chord rod 2, thereby ensuring the stability of the clamping mechanism 1 on the upper chord rod 2.

[0065] Then remove the clamping plate 30 of the clamping mechanism 1 to prevent the clamping plate 30 from affecting the hanging of the installation assembly.

[0066] Then, two clamping plates 44 are installed on the mounting assembly: the mounting assembly includes a sliding track 11 and a slider 7, the slider 7 is welded with a support plate 10, the support plate 10 is threadedly connected with a support rod 16, and the support rod 16 is threadedly connected with a disc 17. The slider 7 moves along the length direction of the fixed plate 26 on the sliding track 11, the clamping plate 44 is clamped on the slider 7, the slider 7 is threadedly connected with a fixing bolt 14, the clamping seat 18 is provided with a cylinder 22, the cylinder 22 is provided with a piston rod 23, and the sliding track 11 is provided with a mounting plate 13. When the mounting assembly is installed on the clamping seat 18, a nut 8 28 is screwed into the piston rod 23 of the cylinder 22, and then the mounting plate 13 of the sliding track 11 is passed through the through hole 5 25 of the clamping seat 18, at which time the limiting groove 12 of the sliding track 11 is clamped on the limiting protrusion 24 of the clamping seat 18. Then move the sliding rail 11 up and down on the clamping seat 18, so that the piston rod 23 passes through the through hole 6 of the mounting plate 13, and the mounting plate 13 is supported on the nut 8 28, and then screw another nut 8 28 on the piston rod 23 of the cylinder 22, and tighten the nut 8 28, so that the two nuts 8 28 fix the mounting plate 13. Then move the slider 7 along the length direction of the fixing plate 26 on the sliding rail 11 to adjust the position of the clamping plate 44. After the adjustment is completed, screw the fixing bolt 14 so that the fixing bolt 14 is pressed against the sliding rail 11. The installation assembly can adjust the position of the clamping plate 44 on the sliding rail 11, so that the subsequent mounting member can be set corresponding to the notch 48, ensuring that the mounting member fixes the rod 46. In addition, the cylinder 22 can control the sliding rail 11 to move up and down, thereby adjusting the setting height of the clamping plate 44. When the rod 46 is installed in the notch 48, the mounting member is below the rod 46, ensuring the installation and positioning operation of the rod 46.

[0067] Then, the fixing rod 8 is passed between the grooves 1 of the clamping plate 29 4, and then nuts 29 9 are screwed into the two ends of the fixing rod 8. Then, the mounting assembly is mounted on the clamping seat 18, so that the two clamping plates 29 4 form an integral body.

[0068] After the fixing rod 8 is inserted into the groove 1 of the two clamping plates 44, the supporting rod 16 is screwed so that the disc 17 supports the connecting plate 49 to prevent the connecting plate 49 from being deformed when the jacking rod 41 and the jacking bolt 43 fix the rod 46, thereby ensuring the horizontal adjustment of the jacking bolt 43.

[0069] (2) The installation assembly of step (1) is hoisted to the steel structure grid unit 1. The sliding track 11 can be hoisted by a crane. The rope of the crane is fixed to the lifting lug 15 of the sliding track 11. The lifting lug 15 can be fixed to the sliding track 11 by bolts. At this time, the clamping plate 44 and the notch 48 are set correspondingly, and the top of the clamping seat 18 is attached to the upper chord rod 2 of the steel structure grid unit 1. Then, the clamping plate 30 is installed on the threaded rod 19, and then the nut 31 is tightened on the threaded rod 19. At this time, the clamping plate 30 and the top of the clamping seat 18 clamp the upper chord rod 2, so that the clamping mechanism 1 is fixed on the upper chord rod 2, and the positioning position of the rod 46 is determined.

[0070] (3) Install the clamping seat 25 on the fixed plate 26: the fixed plate 26 is provided with a through hole 7 29, and the bottom of the clamping seat 25 is provided with a limiting column 2 38, which passes through the through hole 7 29, and the limiting column 25 is threadedly connected with a nut 9 39. When installing the clamping seat 25 on the fixed plate 26, move the limiting column 2 38 in the through hole 7 29 along the length direction of the fixed plate 26, adjust the position of the clamping seat 25 on the fixed plate 26, so that the clamping mechanism 2 can clamp the lower chord 3, and then tighten the nut 9 39 to fix the clamping seat 25 on the fixed plate 26. The installation position of the clamping mechanism 2 on the fixed plate 26 of the present invention can be adjusted, so that when the clamping mechanism 2 clamps the lower chord 3 in the later stage, the clamping mechanism 2 can avoid the web welded on the lower chord 3, thereby ensuring the stability of the clamping mechanism 2 on the lower chord 3.

[0071] Then, the clamping plate 2 32 is rotated on the rotating shaft 36, so that the clamping plate 2 32 is attached to the lower chord rod 3 of the steel structure grid unit 1, and then the clamping plate 3 33 is installed on the threaded rod 2 34, and then the nut 3 40 is tightened on the threaded rod 2 34. At this time, the clamping plate 2 32 and the clamping plate 3 33 clamp the lower chord rod 3, and then the nut 2 37 on the rotating shaft 36 is tightened, so that the clamping mechanism 2 is fixed on the lower chord rod 3. Through the joint action of the clamping mechanism 1 and the clamping mechanism 2, the rotation of the entire control device is avoided, so that the clamping seat 1 18 is always kept in a vertical state, thereby ensuring that the top member is in a horizontal state, and improving the stability of the top member to the rod 46. At the same time, the clamping mechanism 2 can meet the connection between the lower chord rod 3 and the fixed plate 26 with a height difference. Moreover, the force exerted on the top member can be transmitted to the steel structure grid unit 1 through the clamping mechanism 1 and the clamping mechanism 2, thereby improving the force bearing capacity of the top member.

[0072] (4) By changing the positions of the two nuts 642 on the jacking rod 41, adjusting the position of the connecting plate 49 on the jacking rod 41, inserting the fixing rod 8 between the grooves 15 of the two clamping plates 44, then screwing the nuts 49 on the fixing rod 8, extending the jacking rod 41 between the two clamping plates, supporting the jacking rod 41 on the fixing rod 8, then inserting the connecting bolt 44 between the grooves 26 of the two clamping plates, and then screwing the nuts 545 on the connecting bolt 44. The present invention can adjust the distance between the jacking rod 41 and the jacking bolt 43, so that the rod 46 of the set specification can be extended into the area between the jacking rod 41 and the jacking bolt 43, avoiding the jacking rod 41 and the jacking bolt 43 from being unable to fix the rod 46.

[0073] (5) The rod 46 is set in the notch 48, and the sliding track 11 is controlled to move upward by the cylinder 22, so that the rod 46 is in the area between the jacking rod 41 and the jacking bolt 43. Then the jacking rod 41 is moved so that the jacking rod 41 presses the rod 46, and then the height of the connecting bolt 44 is adjusted so that the connecting bolt 44 presses the jacking rod 41, and then the nut 5 45 is tightened. The connecting bolt 44 and the fixing rod 8 limit the jacking rod 41. The connecting bolt 44 and the fixing rod 8 can fix the jacking rod 41 of the set diameter, and at the same time can adjust the height of the jacking member so that the jacking member can apply a force to the middle part of the rod to prevent the rod from sliding at the jacking member. Then tighten the nut 49, the two clamping plates 44 clamp the jacking rod 41, and then the jacking bolt 43 is turned. The jacking bolt 43 presses the rod 46, so that the jacking rod 41 and the jacking bolt 43 fix the rod 46, and the rod 46 is positioned in the notch 48.

[0074] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A method for quality supervision and control of large-span steel structure construction, characterized in that: The steps include: S1. Check the weld quality of two adjacent steel structure grid unit welds, and mark the weld as weld A; S2. When the quality of weld A does not meet the design requirements and specification standards, the weld quality defects are processed by cutting the upper chords of two adjacent steel structure grid units to form cutting positions B and C, where weld A is located between cutting positions B and C, and the cutting section formed by cutting positions B and C is taken out, so that a gap is formed between cutting positions B and C; S3, grinding the cutting position B of the upper chord rod, grinding the cutting position C of the upper chord rod, then calculating the distance D between the cutting position B and the cutting position C, and manufacturing the rod according to the distance D; S4. Install a control device between the upper chord and the lower chord of the steel structure grid unit, then set the rod into the notch, use the control device to fix the rod, and position the rod in the notch. At this time, one end of the rod is aligned with the cutting position B, and the other end of the rod is aligned with the cutting position C. Then, weld and fix the end of the rod to the cutting position B, and weld and fix the end of the rod to the cutting position C at the same time, and then inspect the welds at the welding points. After passing the inspection, remove the control device.

2. The method for construction quality supervision and control of a large-span steel structure building according to claim 1 is characterized in that: The control device comprises a fixing plate, a clamping mechanism 1, a clamping mechanism 2 and a clamping mechanism, wherein the clamping mechanism 1 comprises a clamping seat 1 and a clamping plate 1, wherein the clamping seat 1 is mounted on the fixing plate, wherein the clamping seat 1 is provided with a threaded rod 1, wherein the threaded rod 1 passes through a through hole 1 of the clamping plate 1, and wherein the threaded rod 1 is threadedly connected with a nut 1; The clamping mechanism 2 includes a clamping seat 2, a clamping plate 2 and a clamping plate 3, the clamping seat 2 is installed on the fixed plate, the clamping seat 2 is provided with a rotating shaft, the rotating shaft passes through the through hole 2 of the clamping plate 2, the rotating shaft is threadedly connected with a nut 2, the clamping plate 2 is provided with a threaded rod 2, the threaded rod 2 passes through the through hole 3 of the clamping plate 3, and the threaded rod 2 is threadedly connected with a nut 3; the tightening mechanism includes a mounting assembly, a clamping plate 4 and a tightening piece, the mounting assembly is installed on the clamping seat 1, and two clamping plates 4 are installed on the mounting assembly On the assembly, the tightening member includes a tightening rod, a connecting plate and a tightening bolt, the tightening rod is arranged between the two clamping plates four, a fixing rod is arranged between the grooves one of the two clamping plates four, a nut four is threadedly connected to the fixing rod, a connecting bolt is arranged between the grooves two of the two clamping plates, a nut five is threadedly connected to the connecting bolt, the tightening rod passes through the through hole four of the connecting plate, the tightening rod is threadedly connected to two nuts six, the two nuts six clamp the connecting plate, and the tightening bolt is threadedly connected to the threaded hole of the connecting plate; The operation of the control device fixing the rod is: (1) Install two clamping mechanisms 1 onto the fixing plate, then remove the clamping plate 1 of the clamping mechanism 1, then install the two clamping plates 4 onto the mounting assembly, then insert the fixing rods into the grooves 1 of the clamping plates 4, then screw nuts 4 into both ends of the fixing rods, and then install the mounting assembly onto the clamping seat 1; (2) The installation assembly of step (1) is hoisted to the steel structure grid unit, at which time the clamping plate 4 and the notch are set correspondingly, and the top of the clamping seat 1 is attached to the upper chord rod of the steel structure grid unit, and then the clamping plate 1 is installed on the threaded rod 1, and then the nut 1 is tightened on the threaded rod 1. At this time, the clamping plate 1 and the top of the clamping seat 1 clamp the upper chord rod; (3) Install the clamping seat 2 on the fixed plate, and then rotate the clamping plate 2 on the rotating shaft so that the clamping plate 2 is attached to the lower chord of the steel structure grid unit, then install the clamping plate 3 on the threaded rod 2, and then tighten the nut 3 on the threaded rod 2. At this time, the clamping plate 2 and the clamping plate 3 clamp the lower chord, and then tighten the nut 2 on the rotating shaft; (4) By changing the positions of the two nuts (6) on the jacking rod, adjust the position of the connecting plate on the jacking rod, insert the fixing rod between the grooves (1) of the two clamping plates (4), then screw the nut (4) on the fixing rod, extend the jacking rod between the two clamping plates, support the jacking rod on the fixing rod, then insert the connecting bolt between the grooves (2) of the two clamping plates, and then screw the nut (5) on the connecting bolt; (5) Place the rod into the notch, move the top rod so that it presses against the rod, adjust the height of the connecting bolt so that it presses against the top rod, tighten the nut five, limit the top rod with the connecting bolt and the fixing rod, tighten the nut four, clamp the top rod with the two clamping plates four, and then Tighten the jacking bolt, which presses against the rod, so that the jacking rod and the jacking bolt fix the rod and position the rod in the notch.

3. The method for construction quality supervision and control of a large-span steel structure building according to claim 2 is characterized in that: The two ends of the fixing plate are provided with notches, and the bottom of the clamping seat is provided with a limiting column. The limiting column 1 passes through the slot 1, and the limiting column 1 is threadedly connected with a nut 7; When the clamping seat is installed on the fixed plate, the limit column is moved in the groove along the length direction of the fixed plate, and the position of the clamping seat on the fixed plate is adjusted so that the clamping mechanism can clamp the upper chord rod, and then the nut is tightened to fix the clamping seat on the fixed plate.

4. The method for construction quality supervision and control of a large-span steel structure building according to claim 2 is characterized in that: The mounting assembly comprises a sliding track and a slider, the slider moves along the length direction of the fixing plate on the sliding track, the clamping plate 4 is clamped on the slider, the slider is threadedly connected with a fixing bolt, the clamping seat 1 is provided with a cylinder, the cylinder is provided with a piston rod, and the sliding track is provided with a mounting plate; When the mounting assembly is installed on the clamping seat 1, a nut 8 is screwed into the piston rod of the cylinder, and then the mounting plate of the sliding rail is passed through the through hole 5 of the clamping seat 1. At this time, the limiting groove of the sliding rail is stuck on the limiting protrusion of the clamping seat 1, and then the sliding rail is moved up and down on the clamping seat 1, so that the piston rod passes through the through hole 6 of the mounting plate, and the mounting plate is supported on the nut 8, and then another nut 8 is screwed into the piston rod of the cylinder, and the nut 8 is tightened so that the two nuts 8 fix the mounting plate, and then the slider is moved on the sliding track along the length direction of the fixed plate, and the position of the clamping plate 4 is adjusted. After the adjustment is completed, the fixing bolt is tightened to the sliding track.

5. The method for construction quality supervision and control of a large-span steel structure building according to claim 4 is characterized in that: The slider is welded with a support plate, the support plate is threadedly connected with a support rod, and the support rod is threadedly connected with a disc; After the fixing rod is inserted into the grooves 1 of the two clamping plates 4, the supporting rod is screwed so that the supporting plates support the connecting plates.

6. The method for construction quality supervision and control of a large-span steel structure building according to claim 2 is characterized in that: The fixing plate is provided with a through hole 7, the bottom of the clamping seat 2 is provided with a limiting column 2, the limiting column 2 passes through the through hole 7, and the limiting column 2 is threadedly connected with a nut 9; When installing the clamping seat 2 on the fixed plate, move the limit column 2 in the through hole 7 along the length direction of the fixed plate, adjust the position of the clamping seat 2 on the fixed plate so that the clamping mechanism 2 can clamp the lower chord rod, and then tighten the nut 9 to fix the clamping seat 2 on the fixed plate.

7. The long-span steel structure construction quality supervision and control method according to claim 1 is characterized by: When the control device is removed, a reinforcement block is welded between the rod and the upper chord, and the reinforcement block is set at the welding point between the end of the rod and the cutting position B. At the same time, another reinforcement block is set at the welding point between the end of the rod and the cutting position C.

8. The method for construction quality supervision and control of a large-span steel structure building according to claim 7 is characterized in that: After the reinforcement block is welded, anti-corrosion paint is sprayed on the end of the rod and the welding position of the cutting position B, and anti-corrosion paint is sprayed on the end of the rod and the welding position of the cutting position C, and anti-corrosion paint is sprayed on the reinforcement block.

Images