Manufacturing method of arched girder combination section of super-large-section steel box arch bridge suitable for highway transportation

Abstract

The invention discloses a method for manufacturing an arched girder combined section of a super-large-section steel box arch bridge suitable for highway transportation. Comprising a manufacturing process method of an oversized arch foot steel straining beam rod piece of a parallelogram structure and an oversized arch foot steel arch rib rod piece of an octagonal structure and a process method for controlling the assembly size and the linear shape of an overall space structure of an arch foot steel straining beam and an arch foot steel arch rib. The arch foot steel straining beams of the parallelogram box type structures and the octagonal arch foot arch ribs are integrally manufactured, and the arch foot arch ribs and the arch foot straining beams are connected in a welded mode. According to the method, the complex structural characteristics of octagonal arch springing arch ribs and parallelogram irregular arch springing straining beams of the steel box arch bridge arch beam combination section are combined, the method that the plate units are manufactured firstly and then the box body is assembled is adopted, the tailor-welding size of each plate unit is controlled, and control over welding deformation and the overall size of the subsequent box body is facilitated; an integral horizontal pre-splicing method is adopted, and a matching piece welding method is adopted, so that the aim of controlling the spatial relationship between the arch springing, the arch rib and the straining beam is achieved.

Description

Technical Field

[0001] The invention relates to a method for manufacturing an arch bridge arch beam joint section, in particular to a method for manufacturing an arch bridge arch beam joint section with a super-large cross-section steel box arch bridge suitable for highway transportation. Background Art

[0002] At present, the existing technologies for steel box arch bridges are mostly on-site erection and installation, and there is no manufacturing technology for the arch-beam joint section. At the same time, the arch ribs and tie beams of the arch-beam joint section of previous steel box arch bridges are mostly regular rectangular structures, and the box body is small. They can be manufactured by assembling the top, bottom and web units of the box-type truss members of the truss bridge, and the factory manufacturing is relatively simple. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to propose a method for manufacturing an arch-beam joint section of a super-large section steel box arch bridge suitable for highway transportation, which is suitable for integral production and convenient for highway transportation.

[0004] Technical solution: The present invention comprises the following steps:

[0005] Separate the arch foot tie beam and arch rib along the middle to form two parts;

[0006] The webs and diaphragms of the arch foot tie beams and arch ribs are cut discontinuously at the joints of the upper and lower blocks, so that the webs and diaphragms of the steel tie beams are not completely separated and remain discontinuously connected. After cutting, the grooves at the cuts are flame cut;

[0007] When manufacturing the tie beam of the arch foot, first lay the outer web plate unit on the assembly frame, then assemble the partition plate unit and the top plate unit in sequence, control the assembly position size and verticality or angle of the partition plate unit, and control the position size and parallelogram angle of the top plate unit and the web plate unit;

[0008] After assembly, fillet welds between the bulkhead unit and the bottom plate unit and top plate unit are welded;

[0009] According to the rib reinforcement plate assembly position line marked in advance on the top plate unit, assemble and weld the fillet welds between the rib reinforcement plate unit and the top plate unit, the outer web unit and the rib reinforcement plate unit, and weld the fillet welds between the rib reinforcement plate unit and the top plate unit, taking the diaphragm and the outer web unit as the reference;

[0010] Assemble the inner web plate unit and the bottom plate unit in sequence to ensure the overall assembly size of the parallelogram box, ensure the overall assembly size of the partition plate and the arch rib reinforcement plate at the assembly position corresponding to the arch rib, and weld the fillet welds between the partition plate and the top plate unit and the bottom plate unit in sequence, and weld the fillet welds between the arch rib reinforcement plate unit and the inner web plate unit and the bottom plate unit;

[0011] Finally, assemble the cross beam joint plate and weld the fillet welds between it and the inner web plate unit;

[0012] Assemble and weld the bearing stiffeners and bearing pads;

[0013] Assemble and weld the support pads on the outside of the bottom plate unit and perform overall machining;

[0014] When manufacturing the arch foot and arch rib, on the assembly frame, one side of the web plate unit and one side of the upper and lower corner arc plate units are laid and positioned, and the frame support plate is set according to the outer dimensions of the laid plate unit to control the angle and outer dimensions of the upper and lower corner arc plate units;

[0015] Assemble the partition unit, control the position size and assembly angle; assemble the top plate unit and the bottom plate unit by lateral positioning; assemble the upper and lower corner plate units on the other side, and correct the box opening size; assemble the web plate unit on the other side; finally assemble and weld the foot stiffener plate;

[0016] The arch foot, arch rib and arch foot tie beam are pre-assembled in a horizontal pre-assembly manner. After the overall production is completed, temporary resetting matching parts are installed between the arch foot tie beam and the upper and lower blocks of the arch rib. The temporary connection between the arch foot tie beam, arch rib web and the cut seam during partition cutting is flame cut, and the bevel is trimmed to separate the upper and lower blocks.

[0017] The arch foot tie beam comprises a top plate, a web plate, a bottom plate, a partition plate, a longitudinal stiffening plate, a cross beam joint plate, a support stiffening plate, a support pad plate and an arch rib reinforcement plate.

[0018] The top plate unit has arch rib reinforcement plate assembly position lines marked on both sides of the stiffened side and the non-stiffened side.

[0019] The partition unit comprises a partition, a stiffener and a manhole reinforcement plate, which are welded together on an assembly platform to form the partition unit.

[0020] The assembly and welding sequence of the support stiffener plate is: first assemble the first support stiffener, then weld the fillet welds between it and the partition unit and the bottom plate unit, then assemble the second support stiffener, weld the fillet welds between it and the first support stiffener, the bottom plate unit, and the inner and outer web units, assemble and weld the fillet welds between the third support stiffener and the second support stiffener and the bottom plate unit, and finally assemble and weld the fourth support stiffener.

[0021] The overall flatness of the support pad is no greater than 1 mm.

[0022] The arch foot and arch ribs include a top plate, a web plate, a bottom plate, an arc plate, a partition plate, a longitudinal stiffening plate, and a foot stiffening plate.

[0023] The longitudinal reinforcement of the upper and lower corner arc plate units is provided with an embedded section at the partition.

[0024] The assembling of the web plate unit on the other side specifically includes: welding the fillet welds inside the box between the upper and lower corner arc plate units and the top plate unit and the bottom plate unit, welding the butt welds inside the box between the upper and lower corner arc plate units and the web plate unit on one side, welding the fillet welds between the partition unit inside the box and the top plate unit, the bottom plate unit and the web plate unit, welding the fillet weld on one side outside the box between the lower corner arc plate unit and the bottom plate unit, welding the butt welds outside the box between the web plate unit on the other side and the upper and lower corner arc plate units, and welding the fillet welds outside the box between the top plate unit and the upper corner arc plate unit.

[0025] When the arch foot steel arch rib and steel tie beam are pre-assembled, the steel arch rib is aligned with the steel tie beam arch rib reinforcement plate assembly position line drawn in advance on the side outside the steel tie beam top plate unit box at the plate unit stage to ensure that each plate component of the arch rib octagonal section is aligned with the arch rib reinforcement plate in the steel tie beam box to ensure overall force and at the same time ensure the spatial position, size and angle of the arch foot steel tie beam and steel arch rib.

[0026] Beneficial effects: The present invention combines the complex structural characteristics of the octagonal arch foot and arch ribs of the arch-beam joint section of the steel box arch bridge and the irregular parallelogram arch foot tie beam, adopts the method of first making plate units and then assembling the box body, controls the size of each plate unit welding, and is conducive to controlling the subsequent welding deformation and overall size of the box body. During the overall assembly of the arch foot tie beam, the organizational position line of the arch rib reinforcement plate is drawn at the plate unit stage, and the assembly position of the arch rib reinforcement plate is strictly controlled according to the line assembly during the box assembly process to ensure accurate alignment with the eight sides of the arch rib octagon, so as to meet the force requirements of the arch foot, arch rib and arch foot tie beam after the overall welding; adopts a reasonable assembly sequence to ensure the size of the box body after assembly and the assembly accuracy of the confined space support reinforcement; adopts the method of overall machining after welding to ensure the overall flatness of the support pad, so as to meet the accuracy requirements of the support pad and the close fit between the support during the installation on site. During the overall assembly of the arch foot and arch rib, the reasonable assembly method, welding sequence and method after the overall assembly of the box were adopted in combination with the lap joint relationship of the partition unit and the eight-deformed plate welding edges and the welding operation requirements, so as to ensure the assembly accuracy and welding quality of the arch rib. The method of discontinuous cutting of the web and partition at the joint of the upper and lower blocks, overall production and pre-assembly and then separation was adopted to ensure the production accuracy and improve the construction efficiency, so as to achieve the purpose of controlling the spatial relationship between the arch foot and arch rib and the tie beam and realizing highway transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a block structure schematic diagram of the present invention;

[0028] Figure 2 It is a schematic diagram of the overall structure of the arch foot tie beam of the present invention;

[0029] Figure 3 It is a schematic diagram of the internal structure of the arch foot tie beam of the present invention;

[0030] Figure 4 It is a bottom schematic diagram of the arch foot tie beam of the present invention;

[0031] Figure 5 It is a schematic diagram of the overall structure of the arch foot and arch rib of the present invention;

[0032] Figure 6 It is a schematic diagram of the top plate unit of the arch foot tie beam of the present invention;

[0033] Figure 7 It is a schematic diagram of the bottom plate unit of the arch foot tie beam of the present invention;

[0034] Figure 8 It is a schematic diagram of the web plate unit of the abutment tie beam of the present invention;

[0035] Fig. 9 It is a schematic diagram of the fillet weld between the welded partition and the top plate unit;

[0036] Fig.10 It is a schematic diagram of the fillet weld between the cross beam joint plate and the inner web element;

[0037] Fig.11 This is a schematic diagram of the support stiffening assembly;

[0038] Fig.12 The schematic diagram of the base plate and foot arc plate of the arch foot and arch rib is shown;

[0039] Fig.13 This is a schematic diagram of the assembly of the partition unit of the arch foot and arch rib;

[0040] Fig.14 It is a schematic diagram of the assembly of the top plate and bottom plate units of the arch foot and arch rib;

[0041] Fig.15 This is a schematic diagram of the assembly of the upper and lower corner arc plate units of the arch foot and arch rib;

[0042] Fig.16 This is a schematic diagram of the assembly of the arch foot and arch rib web unit;

[0043] Fig.17 This is a schematic diagram of the welding of the arch foot and arch rib weld;

[0044] Fig.18 This is a schematic diagram of web plate interrupted cutting;

[0045] Fig.19 This is a schematic diagram of intermittent cutting of partitions. DETAILED DESCRIPTION

[0046] The present invention will be further described below in conjunction with the accompanying drawings.

[0047] like Figure 1As shown, the arch-beam combination section of the steel box arch bridge of the present invention comprises two major rod parts, namely, an arch foot arch rib 1 and an arch foot tie beam 2, wherein the arch foot arch rib 1 is inclined inward at an angle of 16° with the vertical plane, the arch foot arch rib 1 is an octagonal box-shaped structure; the arch foot tie beam 2 is a parallelogram box-shaped structure. The arch foot tie beam 2 is connected to the arch foot arch rib 1 by welding.

[0048] like Figure 2 to Figure 4 As shown, the arch foot tie beam 2 adopts a parallelogram box structure, including a first top plate 21, a first web plate, a first bottom plate 23, a first partition plate 24, a first longitudinal stiffening plate 25, a beam joint plate 26, a support stiffening plate, a support pad plate 29, and an arch rib reinforcement plate 27 corresponding to the octagonal outline size of the arch foot arch rib 1. The height of the arch foot tie beam 2 is a variable height structure, with an overall size of 3.5 to 5.1 meters in height, 4.7 meters in width, and 18.7 meters in length. The warehouse is densely covered with partitions, longitudinal stiffening, arch rib reinforcement plates, support stiffening and other steel components, and the penetration welds or partial penetration welds are dense. The structure is extremely complex, and the control of structural dimensions and welding deformation is extremely difficult.

[0049] like Figure 5 As shown, the arch foot and arch rib 1 is an octagonal box-shaped structure with a space arc surface, including a second top plate 11, a second web plate 12, a second bottom plate 13, an arc plate, a second partition plate 15, a second longitudinal stiffening plate 16 and a foot stiffening plate 17. The section height is 5.8m, the width is 3m, and the length is 18.4m. It is an extra-large rod, and the overall size and linearity control are extremely difficult.

[0050] The invention discloses a method for manufacturing an arch-beam joint section of a super-large-section steel box arch bridge, comprising a manufacturing process for super-large arch foot steel tie beam rods with a parallelogram structure and super-large arch foot steel arch rib rods with an octagonal structure, and a process for controlling the assembly size and linear shape of the overall spatial structure of the arch foot steel tie beam and the arch foot steel arch rib.

[0051] The arch foot and arch beam combination section of this embodiment is an overweight and oversized section. Due to the size and weight restrictions of road transportation, before production, the arch foot tie beam and arch rib are divided into two blocks respectively according to the transportation and overall force requirements. The arch foot steel tie beam and steel arch rib are separated along the middle position into two blocks, such as Figure 1 As shown, the arch foot arch rib 1 is divided into an upper arch rib block 101 and a lower arch rib block 102; the arch foot tie beam 2 is divided into an upper tie beam block 201 and a lower tie beam block 202. In order to ensure the overall assembly accuracy of the arch foot arch rib 1 and the upper and lower blocks of the arch foot tie beam 2 after being transported to the bridge construction site by road, and to improve the work efficiency of the factory production, the arch foot arch rib 1 and the arch foot tie beam 2 are produced in the factory using the following production process:

[0052] S1. Fabrication of arch foot steel tie beams

[0053] S11. Parts production: The top plate, web plate, bottom plate, partition plate, longitudinal stiffener plate, beam joint plate, support stiffener plate, support pad plate and arch rib reinforcement plate of the arch foot steel tie beam are cut by CNC or laser to control the cutting size, and the side bevel is flame cut or machined. Among them, the web plate and partition plate are cut intermittently at the joint of the upper and lower blocks, so that the web plate and partition plate of the steel tie beam are not completely separated and kept intermittently connected. After cutting, the bevel at the cut seam is flame cut, such as Fig.18 and Fig.19 As shown;

[0054] S12, such as Figure 6 to Figure 11 As shown, the plate unit is made: the top plate unit 3, the bottom plate unit 8, and the web plate unit are respectively composed of a panel and a longitudinal stiffener. After assembly on a special tire frame, the arch rib reinforcement plate assembly position line m is marked on the top plate unit 3 and the bottom plate unit 8, respectively, as the assembly reference of the arch rib reinforcement plate during the subsequent segment assembly. Among them, the top plate unit 3 has the arch rib reinforcement plate assembly position line m marked on both the stiffening side and the non-stiffening side.

[0055] The partition unit 4 is composed of a partition, a stiffener, and a manhole reinforcement plate, which are welded together on a special assembly platform to form a partition unit.

[0056] S13, Arch foot steel tie beam manufacturing:

[0057] 1) On the assembly frame, first lay the outer web unit 6, and then assemble the partition unit 4 and the top plate unit 3 in sequence. Control the assembly position size and verticality or angle of the partition unit 4, and control the position size and parallelogram angle of the top plate unit 3 and the web unit.

[0058] 2) After assembly, the fillet welds between the partition unit 4, the bottom plate unit 8 and the top plate unit 3 are welded.

[0059] 3) According to the rib reinforcement plate assembly position line m marked in advance on the top plate unit 3, the fillet welds between the rib reinforcement plate unit 5 and the top plate unit 3, the outer web unit 6 and the rib reinforcement plate unit 4 are assembled and welded based on the diaphragm and the outer web unit. The fillet welds between the diaphragm and the top plate unit are welded.

[0060] 4) Then assemble the inner web unit 9 and the bottom plate unit 8 in sequence to ensure the overall assembly size of the parallelogram box, and ensure the overall assembly size of the partition and the arch rib reinforcement plate at the assembly position corresponding to the arch rib. Enter the box from the partition manhole, and weld the fillet welds between the partition and the top plate unit and the bottom plate unit in sequence, and weld the fillet welds between the arch rib reinforcement plate unit and the inner web unit and the bottom plate unit.

[0061] 5) Finally, assemble the cross beam joint plate and weld the fillet welds between it and the inner web unit.

[0062] 6) Assemble and weld the support stiffeners and support pads, wherein the fillet welds between the support stiffeners in the box and the bottom plate, partitions and inner and outer web units are full penetration welds or partial full penetration welds, and the welding quality requirements are high. However, they are affected by the welding space, so the assembly and welding are carried out in a sequence from the inside to the outside. First, assemble the first support stiffener 281, and weld its fillet welds with the partition unit and the bottom plate unit after ensuring the size. Perform non-destructive testing after welding, and then assemble the second support stiffener 282, and weld its fillet welds with the first support stiffener 281, the bottom plate unit, and the inner and outer web units. Perform non-destructive testing after welding. After meeting the requirements, assemble and weld the fillet welds between the third support stiffener 283 and the second support stiffener 282 and the bottom plate unit according to the above method. After the non-destructive testing meets the requirements, finally assemble and weld the fourth support stiffener 284. During the process, ensure the assembly size and welding quality, and control the welding deformation.

[0063] 7) Assemble and weld the support pad 29 on the outside of the bottom plate unit. To ensure the close fit between the arch foot steel tie beam and the support during installation, after welding and trimming the welding deformation, the support pad is machined for overall milling to ensure that the overall flatness is not greater than 1 mm.

[0064] S2. Arch foot steel arch rib production:

[0065] S21. Parts production: The arch foot steel arch rib top plate, web plate, bottom plate, corner arc plate, partition plate, longitudinal stiffener plate and foot stiffener plate are cut by CNC or laser to control the cutting size, and the side bevel is flame cut or machined. Among them, the web plate and partition plate are cut intermittently at the joint of the upper and lower blocks, so that the web plate and partition plate of the steel tie beam are not completely separated and kept intermittently connected. After cutting, the bevel at the cut seam is flame cut, such as Fig.18 and Fig.19 shown.

[0066] S22. Plate unit production: The top plate unit, bottom plate unit, web plate unit and upper and lower corner plate units are respectively composed of panels and longitudinal stiffeners. On a special tire frame, the longitudinal stiffeners and panels are assembled and welded to form the top plate unit, bottom plate unit, web plate unit and corner plate unit. The partition unit is composed of partitions, stiffeners, and manhole reinforcement plates, which are welded together on a special assembly platform to form a partition unit.

[0067] S23, Arch foot steel arch rib manufacturing, such as Figure 12 to Figure 17 As shown:

[0068] 1) On the assembly frame, one side web unit and one side upper and lower corner arc plate units are laid and positioned, and the frame support plate is set according to the outer dimensions of the laid plate unit, with emphasis on controlling the angles and outer dimensions of the upper corner arc plate unit 141 and the lower corner arc plate unit 142. The longitudinal reinforcement of the upper and lower corner arc plate units is provided with an embedded section 18 at the partition to avoid interference between the partition reinforcement groove and the longitudinal reinforcement during the assembly of the partition unit.

[0069] 2) Assemble the partition unit and control the position, size and assembly angle.

[0070] 3) Laterally position and assemble the top plate unit and bottom plate unit.

[0071] 4) Assemble the upper and lower corner arc plate units on the other side and adjust the box opening size.

[0072] 5) Assemble the web plate unit on the other side. After the overall box opening size meets the requirements, weld the inner corner welds between the upper and lower corner arc plate units and the top plate unit and the bottom plate unit on the inner side of the box ①, the butt welds between the upper and lower corner arc plate units and one side of the web plate unit in the box ②, the corner welds between the partition plate unit in the box and the top plate unit, bottom plate unit and web plate unit ③, weld the one side corner weld outside the box between the lower corner arc plate unit and the bottom plate unit ④, weld the other side of the web plate unit and the upper and lower corner arc plate unit butt weld outside the box ⑤, weld the top plate unit and the upper corner arc plate unit The outer corner weld ⑥, ensure that the welding is as horizontal as possible, and avoid upward welding;

[0073] Turn over 180 degrees so that the upper web unit faces downward, weld the inner corner welds between the upper and lower corner arc plate units and the top plate unit and the bottom plate unit ①, the butt welds between the upper and lower corner arc plate units and the web unit on the other side ②, the corner welds between the partition unit in the box and the web unit on the other side ③, weld the other side corner weld outside the box between the lower corner arc plate unit and the bottom plate unit ④, weld the other side web unit and the butt weld outside the box between the upper and lower corner arc plate units ⑤, weld the other side corner weld outside the box between the top plate unit and the upper corner arc plate unit ⑥, ensure that the welding is as horizontal as possible, avoid upward welding, and complete the welding of the entire arch rib weld.

[0074] 6) Finally, assemble and weld the foot stiffening plates to complete the production of the arch foot and arch ribs of the arch-beam joint section.

[0075] S3. Use the horizontal pre-assembly method to pre-assemble the arch foot steel arch rib and steel tie beam. Align the steel arch rib with the steel tie beam arch rib reinforcement plate assembly position line drawn on the side outside the steel tie beam top plate unit box in advance at the plate unit stage to ensure that the octagonal section of the arch rib is aligned with the arch rib reinforcement plate in the steel tie beam box to ensure overall force, while ensuring the spatial position, size and angle of the arch foot steel tie beam and steel arch rib. After the overall production is completed, install temporary reset matching parts between the arch foot steel tie beam and the upper and lower blocks of the steel arch rib, flame cut the temporary connection between the arch foot steel tie beam, the steel arch rib web and the partition cutting time cut seam, and trim the groove to separate the upper and lower blocks.

Claims

1. A method for manufacturing an arch-beam joint section of a super-large-section steel box arch bridge suitable for highway transportation, characterized in that: The following steps are involved: Separate the arch foot tie beam and arch rib along the middle to form two parts; The webs and diaphragms of the arch foot tie beams and arch ribs are cut discontinuously at the joints of the upper and lower blocks, so that the webs and diaphragms of the steel tie beams are not completely separated and remain discontinuously connected. After cutting, the grooves at the cuts are flame cut; When manufacturing the tie beam of the arch foot, first lay the outer web plate unit on the assembly frame, then assemble the partition plate unit and the top plate unit in sequence, control the assembly position size and verticality or angle of the partition plate unit, and control the position size and parallelogram angle of the top plate unit and the web plate unit; After assembly, fillet welds between the bulkhead unit and the bottom plate unit and top plate unit are welded; According to the rib reinforcement plate assembly position line marked in advance on the top plate unit, assemble and weld the fillet welds between the rib reinforcement plate unit and the top plate unit, the outer web unit and the rib reinforcement plate unit, and weld the fillet welds between the rib reinforcement plate unit and the top plate unit, taking the diaphragm and the outer web unit as the reference; Assemble the inner web plate unit and the bottom plate unit in sequence to ensure the overall assembly size of the parallelogram box, ensure the overall assembly size of the partition plate and the arch rib reinforcement plate at the assembly position corresponding to the arch rib, and weld the fillet welds between the partition plate and the top plate unit and the bottom plate unit in sequence, and weld the fillet welds between the arch rib reinforcement plate unit and the inner web plate unit and the bottom plate unit; Finally, assemble the cross beam joint plate and weld the fillet welds between it and the inner web plate unit; Assemble and weld the bearing stiffeners and bearing pads; Assemble and weld the support pads on the outside of the bottom plate unit and perform overall machining; When manufacturing the arch foot and arch rib, on the assembly frame, one side of the web plate unit and one side of the upper and lower corner arc plate units are laid and positioned, and the frame support plate is set according to the outer dimensions of the laid plate unit to control the angle and outer dimensions of the upper and lower corner arc plate units; Assemble the partition unit, control the position size and assembly angle; assemble the top plate unit and the bottom plate unit by lateral positioning; assemble the upper and lower corner plate units on the other side, and correct the box opening size; assemble the web plate unit on the other side; finally assemble and weld the foot stiffener plate; The arch foot, arch rib and arch foot tie beam are pre-assembled in a horizontal pre-assembly manner. After the overall production is completed, temporary resetting matching parts are installed between the arch foot tie beam and the upper and lower blocks of the arch rib. The temporary connection between the arch foot tie beam, arch rib web and the cut seam during partition cutting is flame cut, and the bevel is trimmed to separate the upper and lower blocks.

2. The method for manufacturing an arch-beam joint section of a super-large-section steel box arch bridge suitable for highway transportation according to claim 1, characterized in that: The arch foot tie beam comprises a top plate, a web plate, a bottom plate, a partition plate, a longitudinal stiffening plate, a cross beam joint plate, a support stiffening plate, a support pad plate and an arch rib reinforcement plate.

3. The method for manufacturing an arch-beam joint section of a super-large-section steel box arch bridge suitable for highway transportation according to claim 1, characterized in that: The top plate unit has arch rib reinforcement plate assembly position lines marked on both sides of the stiffened side and the non-stiffened side.

4. The method for manufacturing an arch-beam joint section of a super-large-section steel box arch bridge suitable for highway transportation according to claim 1, characterized in that: The partition unit comprises a partition, a stiffener and a manhole reinforcement plate, which are welded together on an assembly platform to form the partition unit.

5. The method for manufacturing an arch-beam joint section of a super-large-section steel box arch bridge suitable for highway transportation according to claim 1, characterized in that: The assembly and welding sequence of the support stiffener plate is: first assemble the first support stiffener, then weld the fillet welds between it and the partition unit and the bottom plate unit, then assemble the second support stiffener, weld the fillet welds between it and the first support stiffener, the bottom plate unit, and the inner and outer web units, assemble and weld the fillet welds between the third support stiffener and the second support stiffener and the bottom plate unit, and finally assemble and weld the fourth support stiffener.

6. The method for manufacturing an arch-beam joint section of a super-large-section steel box arch bridge suitable for highway transportation according to claim 1, characterized in that: The overall flatness of the support pad after overall machining is no more than 1 mm.

7. The method for manufacturing an arch-beam joint section of a super-large-section steel box arch bridge suitable for highway transportation according to claim 1, characterized in that: The arch foot and arch ribs include a top plate, a web plate, a bottom plate, an arc plate, a partition plate, a longitudinal stiffening plate, and a foot stiffening plate.

8. The method for manufacturing an arch-beam joint section of a super-large-section steel box arch bridge suitable for highway transportation according to claim 1, characterized in that: The longitudinal reinforcement of the upper and lower corner arc plate units is provided with an embedded section at the partition.

9. The method for manufacturing an arch-beam joint section of a super-large-section steel box arch bridge suitable for highway transportation according to claim 1, characterized in that: The assembly of the web plate unit on the other side specifically includes: welding the fillet welds inside the box between the upper and lower corner arc plate units and the top plate unit and the bottom plate unit, welding the butt welds inside the box between the upper and lower corner arc plate units and the web plate unit on one side, welding the fillet welds between the partition plate unit inside the box and the top plate unit, the bottom plate unit and the web plate unit, welding the fillet weld on one side outside the box between the lower corner arc plate unit and the bottom plate unit, welding the butt welds outside the box between the web plate unit on the other side and the upper and lower corner arc plate units, and welding the fillet welds outside the box between the top plate unit and the upper corner arc plate unit; Turn over 180 degrees so that the upper web unit faces downward, weld the fillet welds inside the box between the upper and lower angle arc plate units and the top plate unit and bottom plate unit, weld the butt welds inside the box between the upper and lower angle arc plate units and the web unit on the other side, weld the fillet welds between the partition unit inside the box and the web unit on the other side, weld the fillet weld on the other side outside the box between the lower angle arc plate unit and the bottom plate unit, weld the butt welds outside the box between the web unit on the other side and the upper and lower angle arc plate units, weld the fillet weld outside the box between the top plate unit and the other side of the upper angle arc plate unit.

10. The method for manufacturing an arch-beam joint section of a super-large-section steel box arch bridge suitable for highway transportation according to claim 1, characterized in that: When the arch foot, arch rib and tie beam are pre-assembled, the arch rib is aligned with the steel tie beam arch rib reinforcement plate assembly position line drawn in advance on the side outside the steel tie beam top plate unit box at the plate unit stage to ensure that each plate of the arch rib octagonal section is aligned with the arch rib reinforcement plate in the steel tie beam box to ensure overall force and at the same time ensure the spatial position, size and angle of the arch foot steel tie beam and steel arch rib.

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