A full-bolted arch rib double-splicing coupling manufacturing method

Abstract

The application provides a full-bolting arch rib double-splicing coupling manufacturing method, and belongs to the technical field of arch bridge steel structure processing, and comprises the following steps: step 1, cylinder section manufacturing; step 2, channel web member manufacturing; step 3, box web member manufacturing; step 4, chord tube manufacturing; step 5, truss piece manufacturing; step 6, arch rib section manufacturing; and step 7, wind brace manufacturing. The full-bolting arch rib double-splicing coupling manufacturing method simplifies the super-large-span steel pipe arch rib splicing process, effectively solves the problems of difficult arch rib installation precision control, large and complicated on-site installation workload and the like, not only generates great economic benefits and saves construction period, but also improves the processing and manufacturing precision of the full-bolting arch rib, guarantees the smooth high-altitude butt joint installation of the arch rib, improves the bridge linear precision, realizes the progress of the high-precision installation of the arch rib of the large-span steel pipe arch bridge, and provides new technical support for the development of the steel pipe concrete arch bridge to a larger span and a full-bolting structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of arch bridge steel structure processing, and particularly relates to a full-bolted arch rib double-splicing coupling manufacturing method. BACKGROUND

[0002] Steel pipe concrete arch bridges have the advantages of light weight, large structural rigidity, high bearing capacity, low construction cost and the like, and more and more bridges adopt the steel pipe arch bridge scheme. In the design of a traditional steel pipe arch bridge, the design concept is mainly full-welding, and the arch rib processing is mainly implemented by means of horizontal splicing. The arch rib is generally divided into left and right spans, and the spans are connected by wind braces. Due to the overall large size, the wind braces cannot be matched and manufactured when the horizontal splicing processing method is used, so the wind braces need to be cut and welded on site at a high altitude, which results in large on-site workload and high safety risk.

[0003] With the implementation of the bridge assembly, factory and standardization development by the country, more and more steel pipe arch bridges gradually adopt the bolted scheme, and the positioning and installation tolerance of the steel structure needs to be controlled within 3 mm, which puts forward higher requirements for the steel structure processing and manufacturing and on-site installation precision. The arch rib processing method of the traditional welded system arch bridge cannot meet the precision requirements. The full-assembled bolted arch rib is mainly implemented by means of cantilever splicing on site, and the high-altitude installation and adjustment measures are very limited, which results in difficult control of the installation precision of the arch rib, large and complicated on-site installation workload, and the precision of the steel structure processing greatly determines the installation precision of the arch rib. Therefore, a steel structure processing and manufacturing method based on the full-bolted arch rib is needed to improve the manufacturing precision of the full-bolted arch rib, ensure the smooth high-altitude installation, realize the rapid closure of the arch rib, and reduce the safety risk of cantilever splicing. SUMMARY

[0004] The present application aims to provide a full-bolted arch rib double-splicing coupling manufacturing method, which solves the technical problems of difficult control of the installation precision of the arch rib, large and complicated on-site installation workload. The present application adopts horizontal splicing coupling manufacturing + vertical splicing coupling manufacturing to process the full-bolted arch rib, improves the processing and manufacturing precision of the full-bolted arch rib, ensures the smooth high-altitude butt joint installation of the arch rib, and improves the bridge linear precision.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0006] A full-bolted arch rib double-splicing coupling manufacturing method comprises the following steps:

[0007] Step 1, cylinder section manufacturing, first determine the unfolded size linear form of the main chord pipe cylinder section according to lofting, cut and cut the pre-processed steel plate, pre-press bend, round, weld and round to obtain the cylinder section;

[0008] Step 2, manufacturing of the work-type web plate, the upper and lower flange plates and the web plate are precisely cut, then the web plate positioning line is drawn on the upper and lower flange plates, the upper and lower flange plates and the web plate are assembled and positionally welded according to the line, and the hole group positioning line is drawn on the special platform and drilling, numbering and direction marking are performed to obtain the work-type web plate;

[0009] Step 3, manufacturing of the box-type web plate, the top plate, the bottom plate, the partition plate and the web plate are precisely cut, the partition plate, the web plate and the top plate positioning line are drawn on the bottom plate, the partition plate, the web plate and the top plate are assembled and positionally welded according to the line, and the hole group positioning line is drawn on the special platform and drilling, numbering and direction marking are performed to obtain the box-type web plate;

[0010] Step 4, manufacturing of the chord pipe, the ground sample line is drawn according to the cylinder segment line shape, and the chord pipe jig is erected, the cylinder segment is installed on the chord pipe jig so that the cylinder segment reference line is aligned with the ground sample line, the cylinder segment is positionally welded and then transferred to the rotating jig for weld seam, and then the line shape is checked on the chord pipe jig to obtain the chord pipe;

[0011] Step 5, manufacturing of the girder piece, the girder piece ground sample line is drawn according to the stress-free manufacturing line shape, the chord pipe is erected, the arch rib joint and the line shape are adjusted, the chord pipe is sequentially erected and checked, the work-type web plate and the box-type web plate are positionally welded, and then the stand column joint is welded on the chord pipe to obtain the girder piece;

[0012] Step 6, manufacturing of the arch rib segment, the horizontal connecting rod is symmetrically positionally welded on the lower girder piece, the upper girder piece is installed by the plumb line method, and the upper girder piece and the horizontal connecting rod are positionally welded to obtain the arch rib segment, and the common segment is left on the jig, and the next round of manufacturing is completed according to the above steps;

[0013] Step 7, manufacturing of the wind brace, after the chord pipe and the wind brace jig line are laid out in the vertical assembly site, the vertical assembly jig is installed, the two horizontally assembled arch rib segments are turned over by 90° and then erected, and the wind brace is positionally welded between the two arch rib segments to obtain the arch rib, and the common segment is left on the jig, and the next round of manufacturing is completed according to the above steps.

[0014] Further, in step 1, the pre-press bending is to use a hydraulic machine to pre-bend the butt weld of the steel plate, the welding is to use an automatic submerged arc welding machine to weld the longitudinal seam of the steel plate, and the obtained cylinder segment is clearly marked and numbered and direction marked according to the 0°, 90°, 180° and 270° division lines.

[0015] Further, in step 2, the web plate precision cutting precision is calculated according to the negative tolerance, and the positionally welded is to use CO2 gas shielded welding to weld the web plate and the upper and lower flange plate angle weld and correct the welding deformation.

[0016] Further, in step 3, the positioning welding is used to weld the gusset plate and the bottom plate fillet, the web plate and the bottom plate fillet and the web plate and the top plate fillet by using CO2 gas shielded welding, and correct the welding deformation.

[0017] Further, in step 4, the welding is used to weld the ring fillet of the positioning welded cylinder section by using the automatic submerged arc welding machine on the rotating tire frame.

[0018] Further, in step 5, after the I-shaped web plate and the box-shaped web plate are positioned on the truss piece horizontal assembly jig according to the ground pattern line, the box-shaped web plate is vertically welded between the chord pipes through the node plate, the I-shaped web plate is obliquely welded between the chord pipes through the node plate, the chord pipe and the node plate are positioned and welded by the front fillet and are corrected for the welding deformation, the chord pipe and the node plate are positioned and welded by the back fillet after turning over, and the column joint and the chord pipe are positioned and welded by the fillet and are corrected for the welding deformation.

[0019] Further, in step 6, the cross connecting rod is positioned and welded between the chord pipe, the I-shaped web plate and the box-shaped web plate of the upper and lower truss pieces.

[0020] Further, in step 7, the vertical assembly jig uses the square pier as the main force bearing structure, the moon-shaped adjusting toothed plate is arranged on the top surface of the square pier, the height deviation of the square pier is less than 1mm, the square pier has a plane size of 800*800mm, three kinds of height of the supporting pier are set as 800mm, 1200mm and 1400mm to adjust the main arch rib line shape, the pre-assembly site is arranged at a proper position, and the single group jig is composed of 12 square piers.

[0021] Further, in step 7, the wind brace includes the X brace, the upper horizontal brace, the upper inclined brace, the lower horizontal brace and the lower inclined brace, the X brace, the upper horizontal brace and the lower horizontal brace are positioned and welded at one end between the two arch rib sections, the upper horizontal brace and the lower horizontal brace are welded on the upper and lower sides of the X brace respectively, the upper inclined brace and the lower inclined brace are welded at the other end between the two arch rib sections, and one end of the upper inclined brace is welded on the upper horizontal brace and one end of the lower inclined brace is welded on the lower horizontal brace.

[0022] Further, after the arch rib is obtained, the flange plate projection position of the arch rib is determined according to the stress-free manufacturing line shape and the disc surface is fixed, then the stiffening rib at one end of the flange plate is welded on the chord pipe and the disc surface respectively, and the weld joint between the disc surface and the stiffening rib at the other end is reserved, and the reserved gap is 0.5-1.5cm.

[0023] The application has the following beneficial effects due to the adoption of the above technical scheme.

[0024] The full-bolting arch rib double-splicing coupling manufacturing method simplifies the super-large-span steel pipe arch rib splicing process, effectively solves the problems of arch rib installation precision control difficulty, large and complicated on-site installation workload and the like, not only generates great economic benefits and saves construction period, but also improves the processing and manufacturing precision of the full-bolting arch rib, guarantees smooth high-altitude butt joint installation of the arch rib, improves the bridge linear precision, realizes the progress of high-precision installation of the arch rib of the large-span steel pipe arch bridge, and provides new technical support for the development of the steel pipe concrete arch bridge to a larger span and full-bolting structure. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic diagram of the manufacture of a barrel section of the present application;

[0026] Figure 2 is a schematic diagram of the manufacture of a box-shaped web member of the present application;

[0027] Figure 3 is a schematic diagram of the manufacture of a box-shaped web member of the present application;

[0028] Figure 4 is a schematic diagram of the manufacture of a chord pipe of the present application;

[0029] Figure 5 is a schematic diagram of the manufacture of a chord pipe of the present application;

[0030] Figure 6 is a schematic diagram of the manufacture of a chord pipe of the present application; DETAILED DESCRIPTION

[0031] To make the purpose, technical scheme and advantages of the present application clearer and more comprehensible, the present application is further described in detail below with reference to the drawings and preferred embodiments. However, it should be noted that many details in the description are only for the reader to have a thorough understanding of one or more aspects of the present application, and the aspects of the present application can be realized even without these specific details.

[0032] A full-bolting arch rib double-splicing coupling manufacturing method, comprising the following steps:

[0033] Step 1, barrel section manufacturing, first determine the main chord pipe barrel section unfolding size linear according to lofting, use numerical control to precisely cut and cut down the pre-processed steel plate, adopt automatic submerged arc welding machine for longitudinal seam welding after pipe rolling, then perform secondary roundness processing on the pipe rolling machine, and obtain the barrel section after the roundness meets the requirements; clearly mark and number and direction mark the obtained barrel section according to 0°, 90°, 180° and 270° division lines, and the barrel section manufacturing schematic diagram is as shown in Figure 1 ;

[0034] Step 2, manufacturing of the work-type web member, the upper and lower flange plates and the web plate are precisely cut, the precision of the web plate is calculated according to the negative tolerance, then the web plate positioning line is drawn on the upper and lower flange plates, the upper and lower flange plates and the web plate are assembled according to the line, the web and the upper and lower flange plates are welded by CO2 gas shielded welding, the welding deformation is corrected, the hole group positioning line is drawn on the special platform, and the drilling, numbering and direction marking are performed to obtain the work-type web member, and the manufacturing schematic of the work-type web member is as shown in Figure 2 ;

[0035] Step 3, manufacturing of the box-type web member, the top plate, the bottom plate, the partition plate and the web plate are precisely cut, the partition plate, the web plate and the top plate positioning line are drawn on the bottom plate, the partition plate, the web plate and the top plate are assembled according to the line, the partition plate and the bottom plate, the web plate and the bottom plate and the web plate and the top plate are welded by CO2 gas shielded welding, the welding deformation is corrected, the hole group positioning line is drawn on the special platform, and the drilling, numbering and direction marking are performed to obtain the box-type web member, and the manufacturing schematic of the box-type web member is as shown in Figure 3 ;

[0036] Step 4, manufacturing of the chord pipe, the ground sample line is drawn according to the cylinder segment line shape, and the chord pipe jig is erected, the cylinder segment is installed on the chord pipe jig, so that the cylinder segment reference line is aligned with the ground sample line, the cylinder segment is positioned and welded, then transferred to the rotating jig, the roller jig is started, the automatic submerged arc welding machine is used to weld the ring weld of the positioned and welded cylinder segment, and the line shape is checked after welding to obtain the chord pipe, and the manufacturing schematic of the chord pipe is as shown in Figure 4 ;

[0037] Step 5, manufacturing of the truss piece, the truss piece ground sample line is drawn according to the stress-free manufacturing line shape, and the truss piece horizontal splicing jig is erected, the arch rib joint and the line shape are adjusted after the chord pipe is placed, the chord pipe is placed in turn and checked, the work-type web member and the box-type web member are installed on the truss piece horizontal splicing jig according to the ground sample line, the box-type web member is vertically welded between the chord pipes through the node plate, the work-type web member is obliquely welded between the chord pipes through the node plate, the chord pipe and the node plate front angle weld are positioned and welded, and the welding deformation is corrected, the chord pipe and the node plate back angle weld are positioned and welded after turning over, and the welding deformation is corrected, then the column joint and the chord pipe angle weld are positioned and welded, and the welding deformation is corrected, then the column joint is welded on the chord pipe to obtain the truss piece, and the manufacturing schematic of the truss piece is as shown in Figure 5 ;

[0038] Step 6, manufacturing of the arch rib segment, the horizontal connecting rod is symmetrically positioned and welded on the lower truss piece, the horizontal connecting rod is respectively positioned and welded between the chord pipes, the work-type web member and the box-type web member of the upper and lower truss pieces, the upper truss piece is installed by the plumb line method, the upper truss piece and the horizontal connecting rod are positioned and welded to obtain the arch rib segment, the common segment is left on the jig, and the next round of manufacturing is completed according to the above steps, and the manufacturing schematic of the arch rib segment is as shown in Figure 5 ;

[0039] Step 7, wind brace manufacturing, after string pipe and wind brace tire line lofting is carried out in the vertical splicing site, install vertical splicing tire frame, vertical splicing tire frame adopts square pier as the main force structure, the top surface of the square pier is provided with crescent-shaped adjusting jaw plate, the height deviation of the square pier is less than 1mm, the square pier is provided with three kinds of height of 800mm, 1200mm and 1400mm support pier for adjusting the main arch rib line shape, the pre-assembly site is arranged with measuring table at a proper position, and a single group of tire frame is composed of 12 square piers; after the two horizontal assembled arch rib segments are turned over by 90°, the tire is put on, the wind brace is positioned and welded between the two arch rib segments to obtain the arch rib, the wind brace includes X brace, upper horizontal brace, upper inclined brace, lower horizontal brace and lower inclined brace, the X brace, the upper horizontal brace and the lower horizontal brace are respectively positioned and welded at one end between the two arch rib segments, and the upper horizontal brace and the lower horizontal brace are respectively welded on the upper and lower sides of the X brace, the upper inclined brace and the lower inclined brace are respectively welded at the other end between the two arch rib segments, and one end of the upper inclined brace is welded on the upper horizontal brace, and one end of the lower inclined brace is welded on the lower horizontal brace; the common segment is left on the rack, the next round of manufacturing is completed according to the above steps, and the wind brace manufacturing schematic diagram is as shown in Figure 6 After the arch rib is obtained, the flange disc projection position of the arch rib is determined according to the stress-free manufacturing line shape and the disc surface is fixed, then the stiffening ribs at one end of the flange disc are respectively welded on the string pipe and the disc surface, and the weld joint between the disc surface and the stiffening ribs at the other end is reserved, and the reserved gap is 0.5-1.5cm.

[0040] Embodiment

[0041] A full-bolted arch rib double-splicing coupling manufacturing method, according to the stocking determination, the developed size line type of the cylinder segment is determined, the pre-processed steel plate is cut by using numerical control precision cutting, the butt welding position is pre-bent by using a hydraulic machine, then the pipe is rolled by using a three-roll shaft pipe rolling machine, after the pipe is rolled, the longitudinal seam is welded by using an automatic submerged arc welding machine, then the second round processing is carried out on the pipe rolling machine, after the roundness meets the requirements, the cylinder segment is obtained, the cylinder segment is clearly marked according to the 0°, 90°, 180° and 270° division lines, the cylinder segment is numbered and direction marked, the length of the cylinder segment is less than 3m, the length difference between the cylinder segments is less than 4mm, and the height difference between the cylinder segments is less than 5mm, and the cylinder segment processing allowable control standard is shown in Table 1:

[0042] Table 1 Cylinder segment processing control index unit: mm

[0043]

[0044]

[0045] The upper and lower flange plates and the web are cut by numerical control precision cutting, the web cutting precision is calculated according to negative tolerance, then the web positioning line is drawn on the upper and lower flange plates, the upper and lower flange plates and the web are assembled according to the line, and the web and the upper and lower flange plates are welded by CO2 gas shielded welding, and the welding deformation is corrected, the hole group positioning line is drawn on the special platform, and drilling, numbering and direction marking are performed, and the work type web is obtained; the top plate, the bottom plate, the partition plate and the web are cut by numerical control precision cutting, the partition plate and the web positioning line is drawn on the bottom plate, the partition plate and the web are assembled according to the line, and the partition plate and the bottom plate and the web and the bottom plate are welded by CO2 gas shielded welding, and the welding deformation is corrected, the top plate is assembled according to the line, and the web and the top plate are welded by CO2 gas shielded welding, and the welding deformation is corrected, the hole group positioning line is drawn on the special platform, and drilling, numbering and direction marking are performed, and the box type web is obtained; according to the ground sample line drawn according to the line shape of the cylinder segment, a lengthening chord pipe jig is erected, then the first cylinder segment is installed on the lengthening chord pipe jig, the reference line on the first cylinder segment is aligned with the ground sample line, the first cylinder segment is tightly fixed by using the lengthening chord pipe jig template, then the second cylinder segment is installed on the lengthening chord pipe jig, the four equal division lines on the second cylinder segment are aligned with the first cylinder segment, the longitudinal seams are staggered by 90°, the reference line on the second cylinder segment is aligned with the ground sample line, the second cylinder segment is tightly fixed by using the lengthening chord pipe jig template, the nodes of the first cylinder segment and the second cylinder segment are positioned and welded, the above steps are repeated, the cylinder segments are sequentially lengthened, and the chord pipe is obtained, then the chord pipe is transferred to a rotating jig, the roller jig is started, the automatic submerged arc welding machine is used to weld the circumferential weld, after welding is completed, the chord pipe line shape is checked, and the cylinder segment lengthening allowable deviation is shown in Table 2:

[0046] Table 2: Cylinder segment lengthening control index unit: mm

[0047]

[0048]

[0049] Firstly, linear is manufactured without stress, ground sample line is drawn and truss piece horizontal assembly jig is erected, then first chord tube is installed on the truss piece horizontal assembly jig, the reference line on the first chord tube is aligned with the ground sample line, after the first chord tube is fixed tightly by the truss piece horizontal assembly jig template, the arch rib joint and linear are adjusted, then the second chord tube is installed on the truss piece horizontal assembly jig, the reference line on the second chord tube is aligned with the ground sample line, and the second chord tube is fixed tightly by the truss piece horizontal assembly jig template; after the positioning of the chord tube is checked, the vertical installation of the I-shaped web member and the oblique installation of the box-shaped web member are carried out between the first chord tube and the second chord tube through the node plate, and the I-shaped web member and the box-shaped web member are installed on the truss piece horizontal assembly jig according to the ground sample line for positioning, then the chord tube and the front angle weld of the node plate are positioned and welded and the welding deformation is corrected, the chord tube and the back angle weld of the node plate are positioned and welded and the welding deformation is corrected, then the column joint is installed on the first chord tube and the second chord tube according to the linear, the column joint and the chord tube are positioned and welded and the welding deformation is corrected; after the truss piece is manufactured, the levelness of the truss piece is measured by using high-precision level gauge, so as to ensure that the deviation of each measurement is less than 2mm, after the accuracy of the lower truss piece meets the requirements, the horizontal connecting rod is symmetrically installed on the chord tube of the lower truss piece, the horizontal connecting rod is respectively positioned and welded between the chord tube, the I-shaped web member and the box-shaped web member of the upper and lower truss pieces, and the horizontal connecting rod and the chord tube, the I-shaped web member and the box-shaped web member are positioned and welded and the welding deformation is corrected, then the levelness is checked, then the upper truss piece is installed, the arch rib curvature linear is controlled by the way of plumb line, and the upper truss piece is fixed and limited by the truss piece horizontal assembly jig, the levelness of the upper truss piece is measured, so as to ensure the perpendicularity after the segment is turned over by 90°, after checking that all linear accuracies meet the requirements, the chord tube of the upper truss piece and the horizontal connecting rod are positioned and welded and the welding deformation is corrected; after the matching of the previous round of horizontal assembly is completed, the common segment is left on the truss piece horizontal assembly jig, the posture is adjusted according to the arch rib processing drawing, then the matching manufacturing of the next round is completed according to the above steps, before the horizontal assembly of each round is completed, the three-dimensional posture of the horizontal assembly is scanned by using the three-dimensional laser scanner, the three-dimensional posture of the common segment in the next round is determined through simulation pre-assembly, so as to ensure the accuracy continuation of the horizontal assembly linear, and the actual scanning model is modeled according to the vertical assembly posture, so as to determine the vertical assembly segment linear.

[0050] The chord pipe and wind brace stringer is laid out in the erecting site, the stringer is accurately laid out according to the drawing, the erecting arch rib axis, the inner and outer side lines, the wind brace position line and the arch rib beam section port position line are determined, the erecting measurement control network is established and the erecting stringer is installed, the arch rib section is installed on the stringer by using two 100-ton gantry cranes, the longitudinal joint position, the arch rib perpendicularity, the side bend and the chord elevation line shape are adjusted, the line shape of each component of the arch rib and the deviation of the stringer line are controlled within the specification requirements, the two horizontal assembled arch rib sections are turned over 90° and then put on the stringer, the whole round is measured and checked to control the perpendicularity of the arch rib section, the erecting elevation line shape and the diagonal line yield value; the erecting stringer adopts square piers as the main force structure, the moon-shaped adjusting jaw plate is arranged on the top surface of the square pier, the elevation deviation is less than 1mm, the square pier plane size is set as 800×800mm, three kinds of height of the support pier are set, i.e. 800mm, 1200mm and 1400mm, which are used to adjust the main arch rib line shape, the measurement table is arranged at the appropriate position in the pre-assembling site, one set of stringer is composed of 12 square piers, the total station instrument is used for laying out and positioning during the section assembling, the support pier is fixed by using the anchor bolt, the jaw plate height is determined by using the level after the support pier is fixed, the erecting stringer is used for erecting the arch rib, the top surface of the support pier of the stringer is leveled, the stringer should be arranged on the same straight line and as close as possible to the structure stress point (the center line of the web member); the hoisting and stringing are completed and the initial positioning is completed, the main arch rib section is adjusted according to the stringer line position and the measurement data, so that the arch rib positioning meets the specification requirements. The inspection items are as follows: the arch rib inner side line side bend (the lower chord and the inner side stringer line are reviewed, the upper chord is measured by using the total station instrument), the arch rib length (the arch rib port position stringer line is measured), the arch rib perpendicularity (the lead plummet is used for measuring the lower chord pipe, the total station instrument is used for measuring the upper chord pipe and the inner side of the side arch rib), the arch rib elevation (the linear difference with the design) and the inner side arch pipe center section diagonal line difference. The wind brace is temporarily connected with the lower node plate and the single-sided web, the steel back rib or support frame is set to reduce the node plate welding deformation, the arch rib section after the stringing is completed is positioned and welded; the wind brace includes X brace, upper horizontal brace, upper inclined brace, lower horizontal brace and lower inclined brace, the X brace is temporarily connected with the node plate and the web in advance, the lower horizontal brace and the lower inclined brace are installed to the wind brace temporary stringer and the lower node plate is bottom welded, then the upper node plate is installed and the plate is fixed, the lower node plate and the upper node plate are welded and the weld is penetrated, then the web on the other side of the node position is positioned and welded, when the node plate is welded, the lower horizontal brace and the lower inclined brace are opened with the node plate, so that the node plate can be deformed freely during the welding process to prevent the arch rib from being deformed, after the horizontal brace and the lower inclined brace are positioned and welded, the X brace is integrally positioned and installed, the support stiffening plate is set under the flat link node plate, then the lower node plate and the upper node plate are positioned and welded, the X brace node plate welding is completed, the through length rod is connected with the short rod by matching the on-site drilling, the upper horizontal brace and the upper inclined brace are welded according to the welding method of the lower horizontal brace and the lower inclined brace.After the arch rib flange is cut and drilled according to the design and the surface is milled, each pair of arch rib flanges is fastened by temporary bolts to ensure that the arch rib flange plate surface is 100% tightly attached, the projection position of the arch rib flange plate is determined on the arch rib according to the stress-free manufacturing line and the plate surface is fixed, then the stiffening rib at one end of the flange plate is welded on the chord tube and the plate surface respectively, and the weld between the plate surface and the stiffening rib at the other end is reserved, and the reserved gap is 0.5-1.5 cm. The vertical coupling matching manufacturing is carried out, after the segment horizontal matching manufacturing, the segment is turned over by 90°, and is installed vertically according to the bridge forming attitude, after the transverse deviation and the segment position are determined, the wind brace is installed according to the mold line, the node plate and the wind brace are temporarily connected by punching and common bolting, the wind brace node plate is welded, after the welding is completed, the vertical coupling line is comprehensively reviewed, the flange stiffening plate is welded, and the arch rib vertical matching manufacturing is completed.

[0051] The arch rib vertical coupling line is scanned by using a laser scanner, the actual theoretical model is fitted with the stress-free state BIM model, the three-dimensional precision is judged, and the chord tube error and the overall assembly length of the wheel are mainly controlled, and when the error is large, correction treatment needs to be carried out; after the arch rib positioning is completed, the wind brace and other components are installed, and after the installation and welding are completed, the whole is measured and inspected, in order to reduce the deformation in the welding process of the wind brace node plate, independent supports are arranged at the wind brace node position, the matched wind brace is disconnected in advance, and the welding influence on the arch rib line is avoided. The public segment of the vertical coupling is reserved, and the attitude of the public segment is adjusted according to the vertical coupling line requirement, in the adjustment process, whether the attitude meets the requirement is judged by using a three-dimensional laser scanner, so as to ensure the three-dimensional attitude of “N+1” and realize the precision transmission between different wheels, before the next wheel of the arch rib segment is placed, according to the three-dimensional attitude of the public segment, according to the digital simulation assembly technology, the elevation of each wheel frame of the next wheel is accurately judged, and the elevation is controlled, so as to improve the efficiency of the line shape adjustment of the arch rib segment placement, after the public segment adjustment is completed, the above steps are repeated to complete the matching manufacturing of the subsequent wheel.

[0052] The horizontal coupling + vertical coupling double coupling manufacturing process is adopted, and the three-dimensional laser scanning digital simulation assembly technology is matched, the efficiency and precision of assembly are improved, the arch rib can be successfully installed in the air; the components processed by using the technology can be restored and installed according to the vertical coupling state during high-altitude hoisting, 2 wind braces are installed every day, compared with 4-5 days per wind brace, the wind brace installation occupies the key line is effectively avoided, the time of the large cantilever of the arch rib is greatly reduced, and the structural risk is effectively reduced.

[0053] The above only describes the preferred embodiments of the present application, and it should be noted that, for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A method for manufacturing a full-bonded arch rib double-spliced coupling, characterized by comprising the steps of: The method comprises the following steps: ​ Step 1, manufacturing of a cylinder segment, first, determining the development dimension line shape of the main chord tube cylinder segment according to lofting, cutting and blanking the pretreated steel plate, pre-bending, rounding, welding and rounding to obtain the cylinder segment; Step 2, manufacturing of a work-type web member, precisely cutting the upper and lower flange plates and the web plate, then drawing the web plate positioning line on the upper and lower flange plates, assembling and positioning the upper and lower flange plates and the web plate according to the line and performing positioning welding, drawing the hole group positioning line on the special platform and performing drilling, numbering and direction marking to obtain the work-type web member; Step 3, manufacturing of a box-type web member, precisely cutting the top plate, the bottom plate, the partition plate and the web plate, drawing the partition plate, the web plate and the top plate positioning line on the bottom plate, assembling and positioning the partition plate, the web plate and the top plate according to the line and performing positioning welding, drawing the hole group positioning line on the special platform and performing drilling, numbering and direction marking to obtain the box-type web member; Step 4, manufacturing of a chord tube, drawing the ground pattern line according to the cylinder segment line shape and erecting the chord tube jig, installing the cylinder segment on the chord tube jig so that the cylinder segment reference line is aligned with the ground pattern line, performing positioning welding on the cylinder segment and then transferring the cylinder segment to the rotating jig to perform weld seam, and then returning to the chord tube jig to check the line shape to obtain the chord tube; Step 5, manufacturing of a truss piece, drawing the truss piece ground pattern line according to the stress-free manufacturing line shape, erecting the truss piece lying assembly jig, adjusting the arch rib joint and the line shape after the chord tube is installed, sequentially installing the chord tube and checking whether the chord tube is correct, positioning and welding the work-type web member and the box-type web member, and then welding the stand column joint on the chord tube to obtain the truss piece; Step 6, manufacturing of an arch rib segment, symmetrically positioning and welding the horizontal connecting rod on the lower truss piece, installing the upper truss piece by means of the plumb line, positioning and welding the upper truss piece and the horizontal connecting rod to obtain the arch rib segment, leaving the common segment on the jig, and completing the next round of manufacturing according to the above steps; Step 7, manufacturing of a wind brace, erecting the vertical assembly jig after the chord tube and the wind brace jig line are lofted in the vertical assembly site, turning the two lying assembled arch rib segments by 90° and installing them on the jig, positioning and welding the wind brace between the two arch rib segments to obtain the arch rib, leaving the common segment on the jig, and completing the next round of manufacturing according to the above steps; In step 7, the vertical assembly jig adopts a square pier as the main force bearing structure, the moon-shaped adjusting jaw plate is arranged on the top surface of the square pier, the height deviation of the moon-shaped adjusting jaw plate is less than 1mm, the square pier has a plane size of 800x800mm, three kinds of support piers with heights of 800mm, 1200mm and 1400mm are arranged to adjust the line shape of the main arch rib, and a measurement table is arranged at a proper position in the pre-assembly site, and a single set of jig is composed of 12 square piers; In step 7, the wind brace comprises an X brace, an upper horizontal brace, an upper inclined brace, a lower horizontal brace and a lower inclined brace, the X brace, the upper horizontal brace and the lower horizontal brace are respectively positioned and welded at one end between the two arch rib segments, the upper horizontal brace and the lower horizontal brace are respectively welded on the upper and lower sides of the X brace, and the upper inclined brace and the lower inclined brace are respectively welded at the other end between the two arch rib segments, and one end of the upper inclined brace is welded on the upper horizontal brace and one end of the lower inclined brace is welded on the lower horizontal brace. After the arch rib is obtained, the flange plate projection position of the arch rib is determined according to the stress-free manufacturing line shape, the disc surface is fixed, then the stiffener rib at one end of the flange plate is welded on the chord tube and the disc surface respectively, and the weld joint between the disc surface and the stiffener rib at the other end is reserved, and the reserved gap is 0.5-1.5 cm.

2. The all-welded spliced and coupled manufacturing method of arch-rib according to claim 1, characterized in that: In step 1, the pre-bending of the steel plate butt weld joint position is performed by using a hydraulic press, the longitudinal seam welding of the steel plate is performed by using an automatic submerged arc welding machine, the obtained cylinder segment is clearly marked and numbered according to the 0°, 90°, 180° and 270° division lines and direction marks.

3. The method of claim 1, wherein: In step 2, the precision of the web plate is calculated according to the negative tolerance, the positioning welding is performed by using CO2 gas shielded welding to weld the fillet weld between the web plate and the upper and lower flange plates, and the welding deformation is corrected.

4. The all-welded spliced and coupled manufacturing method of arch-rib according to claim 1, characterized in that: In step 3, the positioning welding is performed by using CO2 gas shielded welding to weld the fillet weld between the partition plate and the bottom plate, the fillet weld between the web plate and the bottom plate and the fillet weld between the web plate and the top plate, and the welding deformation is corrected.

5. The method of claim 1, wherein: In step 4, the welding is performed by starting the roller bed on the rotating bed, and using an automatic submerged arc welding machine to weld the ring weld of the cylinder segment after positioning welding.

6. The all-welded spliced and coupled manufacturing method of arch-rib according to claim 1, characterized in that: In step 5, the I-shaped web plate and the box-shaped web plate are positioned on the truss piece horizontal assembly bed according to the ground pattern line, then the box-shaped web plate is vertically welded between the chord tubes through the node plate, the I-shaped web plate is obliquely welded between the chord tubes through the node plate, the front fillet weld between the chord tube and the node plate is positioned and welded and the welding deformation is corrected, the back fillet weld between the chord tube and the node plate is positioned and welded and the welding deformation is corrected, then the column joint is positioned and welded with the chord tube fillet weld and the welding deformation is corrected.

7. The method of claim 1, wherein: In step 6, the cross connecting rod is respectively positioned and welded between the chord tube, the I-shaped web plate and the box-shaped web plate of the upper and lower truss pieces.

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