A bicycle viaduct attached to a city viaduct and a manufacturing method thereof

Abstract

The present invention discloses a bicycle viaduct attached to an urban viaduct and a manufacturing method, belonging to the technical field of bicycle highways; the technical scheme is as follows: a bridge body including a truss structure, the bridge body including a component assembly of side beams, an intermediate cross beam, and a Cladding bracket; the side beams are located on both sides of the bridge body, the side beams are I-beam structures, the intermediate cross beams are I-beams and angle steels connected to form a frame structure, the bridge deck is laid on the top, and Cladding brackets and Cladding aluminum-plastic baffles are provided on both sides and the bottom of the beam section. The beneficial effects of the present invention are as follows: the present scheme effectively controls the deformation problem of thin plates during welding by adopting advanced welding technology and processes, such as accurately controlling welding heat input, adopting a unique welding sequence and method, and performing pre-deformation treatment before welding; this directly solves the difficulty of controlling the deformation of thin plate welding mentioned in the background technology, and improves the accuracy and stability of the bridge structure.

Description

Technical Field

[0001] The invention relates to the technical field of bicycle highways, in particular to a bicycle viaduct attached to a city viaduct and a manufacturing method thereof. Background Art

[0002] With the changes in the environment and climate, humans are paying more and more attention to environmental protection. Low-carbon travel and green travel will become a trend. The importance of bicycles as a green travel method is becoming increasingly prominent. Bicycle exercise or travel is becoming more and more popular among people. Coupled with the growing demand for urban transportation, bicycle highways came into being in this context.

[0003] As an important part of modern urban transportation, the space utilization efficiency and carrying capacity of urban viaducts have always been the focus of urban planning and engineering design. In this context, the manufacturing technology of bicycle viaducts attached to urban viaducts came into being. It can meet the requirements of traffic, not occupy ground space, make full use of the space between the left and right sides of the existing viaducts, and be attached to the existing viaducts, so there is no need to set up corresponding piers, which does not affect the traffic on the ground roads, and promotes low-carbon travel.

[0004] Although the manufacturing technology of bicycle viaducts, which is attached to urban viaducts, has significant advantages in theory, it faces a series of technical difficulties in the actual manufacturing process. Among them, thin plate welding deformation control is one of the most prominent problems. In the process of bridge manufacturing, in order to reduce the dead weight of the structure and improve the efficiency of material use, thinner steel plate materials are usually used. However, thin plate materials are very easy to deform during the welding process, which not only affects the accuracy and stability of the bridge structure, but also increases the difficulty of subsequent processing and installation. In addition, the existing welding technology and processes often make it difficult to accurately control the heat input and stress distribution during welding, resulting in welding deformation that is difficult to predict and control. The existence of these problems has seriously restricted the further development and application of bicycle viaduct manufacturing technology.

[0005] In view of the difficulty of thin plate welding deformation control in the existing technology, it is urgent to develop new manufacturing methods and technologies to achieve effective control of welding deformation. This requires not only the optimization of the welding process, but also comprehensive consideration of material selection, structural design, pre-deformation control, and lug positioning accuracy. Through the innovation and improvement of these technical means, the manufacturing accuracy and structural stability of bicycle viaducts can be significantly improved, thereby promoting the application and development of this technology in urban transportation construction. In addition, the optimization of the connection and coordination methods between small segments is also the key to improving the overall structural performance and construction efficiency. Therefore, the development of a set of manufacturing methods that comprehensively solve the above problems is of great practical significance for promoting the sustainable development of urban transportation. Summary of the invention

[0006] In order to solve the above problems, the present invention proposes a bicycle viaduct attached to an urban viaduct and a manufacturing method, which solves the problem of thin plate welding deformation control in the prior art.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0008] A bicycle viaduct attached to a city viaduct comprises a bridge body of a truss structure, wherein the bridge body comprises a componentized assembly of side beams, a middle cross beam, and a cladding bracket;

[0009] The side beams are located on both sides of the bridge body and are I-beam structures;

[0010] The middle crossbeam is connected by I-beams and angle steels to form a frame structure, and the bridge deck is laid on the top to form a bottom frame;

[0011] Cladding brackets and Cladding aluminum-plastic baffles are provided on both sides and the bottom of the beam segment. The segments are connected by connecting plates and bolts, and the bridge deck is connected by countersunk bolts.

[0012] The cladding bracket includes an upper cladding bracket and a lower cladding bracket;

[0013] The upper Cladding bracket is used as a mounting bracket for the aluminum-plastic panel, and a flange plate is arranged on one side of the bottom, and a handrail support assembly is arranged on one side of the middle. The handrail support assembly includes a handrail support, a handrail tube connecting plate is arranged on one side of the handrail support, and a handrail railing is arranged on the handrail tube connecting plate. The top of the upper Cladding bracket is connected to the angle steel through a node plate; the upper Cladding bracket and the lower Cladding bracket are connected to the side beam through the flange plate by bolts, the lower Cladding bracket is longitudinally connected to the T-shaped steel by the node plate and bolts, and the upper Cladding bracket is connected to the angle steel by the node plate and bolts.

[0014] The bridge deck is made of 6mm steel plate;

[0015] The steel plates used in this bridge are generally thinner. Except for the 25mm and 30mm thick steel plates at the lug positions, the rest are 6mm and 10mm steel plates.

[0016] Based on the manufacturing method of the bicycle viaduct attached to the urban viaduct, the overall manufacturing process is as follows:

[0017] The side beams, middle cross beams, upper cladding brackets and lower cladding brackets are assembled into components; the side beams, middle cross beams and bridge deck are assembled into a frame structure, and the holes on the side beams are drilled using the cladding bracket flange plate holes as a template. After the drilling is completed, the lower cladding bracket is assembled and the upper cladding bracket is assembled;

[0018] In order to reduce the workload of on-site hole matching, the holes of the cladding bracket flange plate, the connected node plate, the longitudinally connected T-shaped steel with matching holes, and the longitudinally connected angle steel are opened in advance; considering the reasons of trial installation, the cladding bracket and the flange plate are not assembled, and the node plate and the connecting piece are not assembled first, and they will be assembled and welded according to the actual position after the trial installation.

[0019] When making the side beam, the side beam is divided into the top plate, bottom plate and web plate. A number of evenly distributed curb plate supports are set on one side of the web plate, a number of evenly distributed notches are opened on one side of the top plate, and a number of evenly distributed rib plates are set on one side of the top plate. When cutting the top plate, bottom plate and web plate, the welding shrinkage allowance is added by 2‰ on the drawing size, and at the same time, the two ends of the side beam are added by 20mm for the final ring matching;

[0020] The top plate and the web plate need to be spliced ​​first, and a 2mm gap is placed at the annular seam during splicing to cope with welding shrinkage; after the splicing is completed, it is assembled into an I-beam on the ship-shaped tire frame. During assembly, an angle inspection template is used for inspection to ensure that the angle between the side beam top plate and the web plate meets the requirements; the two angles of the angle inspection template correspond to the angles between the two sides of the web plate and the top plate, so that the assembly angle can be quickly inspected to see if it meets the requirements, while avoiding the common inspection method of measuring the distance of a certain point by calculation.

[0021] After assembly, a semi-automatic welding robot is used to weld on the ship-shaped tire frame to reduce welding deformation. At the same time, in order to speed up production efficiency and reduce the workload of correction after welding, the bottom plate is pre-bent by a hydraulic press before assembly to give anti-deformation, and the anti-deformation tooling is used to lock the shape during assembly;

[0022] Before the top plate is assembled, the top plate of the side beam is deformed by setting the anti-deformation tooling in the notch to ensure that the top and bottom plates can meet the flatness requirements after welding. The anti-deformation tooling consists of a card plate and a wedge block. The wedge block can be knocked to control the anti-deformation amount according to the actual situation;

[0023] The card plate includes an upper card plate and a lower card plate;

[0024] The wedge-shaped block includes a wedge;

[0025] At the same time, in order to facilitate on-site adjustments during trial assembly, the welds within 300mm of the side beam ends are not welded until the ring position is adjusted during trial assembly.

[0026] When the middle cross beam was made, in order to reduce the impact of welding deformation and ensure the camber of the bridge deck, a margin was placed in the middle of the middle cross beam under the premise of the original drawing requirements to ensure the final lateral upward deflection. When the middle cross beam was assembled, a pre-camber of +12mm was placed in the middle, the flange plate in the length direction was +10mm, and the lower flange plate was +6mm, so as to eliminate the welding shrinkage deformation of the bridge deck. Before and after welding, inspection templates with pre-camber and in line with the theoretical dimensions of the drawings were made for inspection after assembly and welding;

[0027] In order to ensure the size of the welding hole of the middle beam and the alignment of the bottom plate during assembly, a welding hole tooling was designed to ensure the size of the welding hole. At the same time, the steps of first cutting the bottom plate flange and then trimming the welding hole were specified to ensure that the shape and clearance of the welding hole meet the requirements during assembly.

[0028] When making the Cladding bracket, the Cladding bracket is divided into the upper Cladding bracket and the lower Cladding bracket. In order to reduce the workload of drilling holes, the holes on the Cladding bracket are all opened by laser. At the same time, the flange plate is drilled by CNC to ensure the accuracy of the holes. In order to facilitate later adjustments, the Cladding bracket and the flange plate are not welded, and welding is performed after the installation and adjustment of the Cladding bracket is completed;

[0029] When making the upper Cladding bracket, a full-size inspection template is used to ensure the curvature of the upper Cladding bracket, which is convenient for subsequent control. To facilitate adjustment and installation of guardrails, the flange plate is not assembled with the Cladding bracket. The flange plate is directly spot welded on the web of the side beam with holes drilled on the side beam. The top angle steel connects the node plate and the bracket for spot welding, which can be adjusted later according to the actual position of the angle steel. The handrail support is spot welded, not welded, and assembled and welded according to the actual position after the handrail pipe is installed and adjusted in place. The handrail pipe connecting plate is first installed on the handrail, and then assembled and welded on the handrail support according to the actual position.

[0030] The armrest support plate is arc-shaped, and the holes are opened by laser, which reduces the workload of opening holes. Due to its small size, there are safety risks when using a bending machine or a punching machine, and the accuracy cannot be guaranteed. This solution makes a small pressing tool, which is pressed by a jack and a simple mold. It can be completed by a single person, and the efficiency is also improved. In order to eliminate the problem that the aperture of the support plate is small at the top and large at the bottom after bending, the holes on the support plate after bending are reamed twice to ensure that the aperture is consistent from top to bottom and meets the requirements;

[0031] The lower Cladding bracket is made for inspection using an inspection template, the node plate is spot welded on the bracket, and after the middle connecting T-steel is installed and adjusted in place, the position of the node plate can be adjusted according to the actual position for welding; the flange plate is not assembled with the Cladding bracket, the flange plate is directly spot welded on the web of the side beam and holes are drilled on the side beam, and the Cladding bracket is adjusted in place and welded to the connection weld; the holes on the Cladding bracket are all opened by laser, and a welding shrinkage allowance of 1‰ is placed for the hole spacing. After welding, the measured spacing size deviation is <1mm, which meets the requirements.

[0032] When assembling the water collecting tank, in order to ensure that the water collecting tank and the water collecting tank seat can be matched smoothly, the water collecting tank and the support are drilled using a drill template after being welded to ensure that they can be interchangeable. At the same time, in order to ensure the fit, the flatness of the water collecting tank support and the water collecting tank connection surface is required to be 1mm.

[0033] The lower cladding bracket panel, ring angle steel, etc. need to be welded with nuts. In order to accurately install the nuts and ensure the through-hole rate and the verticality of the nuts, a nut welding tool is designed to fix the nuts during welding.

[0034] When assembling beam sections, two types of positive and negative frames need to be set up according to the line type. The frames are adjusted according to the amount of shrinkage that needs to be placed. Pre-biased values ​​are placed on the side beams on both sides, i.e. L1+6mm, L2+10mm, and the cross beam arch +12mm, to cope with the deformation caused by welding. For curb plates connected by countersunk holes, drilling templates are used to drill holes to improve drilling accuracy and ensure replaceability. At the same time, tooling is used to install the supports on both sides to improve assembly accuracy. When assembling, the vertical and horizontal reference lines are determined by the longitudinal and transverse centers of the beam sections. When assembling the bottom frame, it is assembled from the middle to both sides, and the welding sequence is also from the middle to both sides, which helps to eliminate welding stress and reduce welding deformation.

[0035] During assembly, in order to facilitate welding and grinding, turn the machine over several times:

[0036] 1) In order to ensure that the welds of the longitudinal connecting angle steel can meet the P3 requirements, the frame is erected, the joint welds of the middle beam and the side beam are welded, the vertical seams and flat welds of the clamping plate and the sealing plate support on the upper part of the beam are welded, and the first turn-over is carried out;

[0037] 2) After the first turn-over, weld the welds of the middle cross beam and the longitudinal connecting angle steel, grind the welds until they meet the P3 requirements, and weld the welds of the clamping plate and the cover plate support on the upper part of the cross beam and the side beam;

[0038] 3) After the longitudinal angle steel connection welds meet the requirements, weld the welds of the middle beam flange plate and the bottom of the side beam bottom plate, and the welds of the T-plate and the middle beam and side beam flange plates; after the welding and grinding meet the requirements, turn over for the second time and install the bridge deck;

[0039] 4) After the second turn, position the bridge deck according to the drawing, spot weld it firmly and then turn it over again;

[0040] 5) After the third turn-over, the segmental welding of the bottom of the bridge deck is completed, including the segmental welding of the cross beam and the longitudinal angle steel, and the remaining welds on the reverse side;

[0041] 6) Turn over for the fourth time, weld the top weld of the bridge deck, weld the remaining welds, and correct the beam section;

[0042] 7) Turn over for the fifth time, install the bottom channel steel, weld the bottom channel steel, test install the lower cladding bracket, and weld the flange plate and node plate;

[0043] 8) Turn over for the sixth time, test-assemble and adjust the upper cladding bracket, and weld the flange plate and node plate;

[0044] After production, the requirements are: lateral deviation ≤4mm, camber deviation ≤2mm, twist deviation ≤4mm, length deviation ≤2mm, width deviation ≤2mm, diagonal deviation ≤4mm, bridge deck flatness ≤2mm;

[0045] In order to improve efficiency, the trial installation of the upper and lower Cladding brackets of a single section is completed in the workshop. This type of bridge is fixed by hanging rods, and the position of the lifting lug is more important. Therefore, when trial installing the upper Cladding bracket, the Cladding bracket with the lifting lug is used as the reference, and the Cladding bracket is installed based on the two lifting lugs to control the spacing. The installation accuracy of the lifting lugs is repeatedly adjusted through precise measurement. Because the aluminum-plastic panel wrapped outside the Cladding bracket cannot be trial assembled, it is necessary to control the spacing of the Cladding bracket to ensure that the aluminum-plastic panel can be installed. Due to the special structure, the positioning dimensions of the Cladding brackets need to be controlled, including the relative position of the upper Cladding bracket and the lower Cladding bracket, the spacing and up and down positions between the Cladding brackets, and the axis of the upper Cladding bracket and the lower Cladding bracket should be kept as flush as possible, with a maximum deviation of no more than 4mm; the lateral spacing deviation of the Cladding brackets is controlled within the range of ±4mm without affecting the installation of the aluminum-plastic panel; due to the deviation in the production of the beam section, all the Cladding brackets are installed and adjusted as a whole to meet the requirements during the trial installation;

[0046] This type of bridge has high requirements for appearance, so while meeting the installation requirements, it is also necessary to take aesthetics into consideration. The aluminum-plastic panel should be kept as flat as possible, and the hole spacing is measured by using the wires at both ends as a reference to control the elevation deviation of the Cladding bracket within ±3mm. The requirements can be met by adjusting the position of the aluminum-plastic panel.

[0047] During the field trial assembly, the beam segments are assembled in the field according to the rounds. First, the two ends of a round are laid flat according to the bridge position line type, and then a coordinate system is established to give the coordinates of the corresponding trial assembly frame. The beam segment is hoisted onto the frame, the beam segment position is adjusted, and the bridge deck and curb plate trial assembly holes at the beam segment ring mouth, the ring mouth connecting plate matching holes, the bottom T-shaped steel, top angle steel and middle handrail pipe longitudinally connected at the ring mouth position, and the handrail support assembly on the upper Cladding bracket are welded; the expansion joint end needs to test-assemble the EJ component, measure the spacing, test-assemble the lap bridge deck and side beam cover plate; and other tasks. The top connecting angle steel of the middle ring, the bottom connecting T-steel, and the curb plate at the ring are all +20mm in the length direction for adjustment, and the bridge deck width +20mm is used for adjustment; the angle steel, T-steel and curb plate at the ring are different from other holes drilled first. They are matched with holes according to the actual position, and the bridge deck is matched with holes according to the actual situation. The corresponding data is measured after the ring is matched, and the holes are matched after trimming according to the actual size; the connecting plate is drilled first, and after the beam section is adjusted into place, the connecting plate is fixed with a C-clamp, and the holes on the beam section are drilled using the connecting plate as a template, thereby improving the accuracy of the linear shape between the beam sections.

[0048] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a bicycle viaduct attached to a city viaduct and a manufacturing method, and its advantages are mainly reflected in the following aspects:

[0049] (1) Effective control of thin plate welding deformation: This solution effectively controls the deformation of thin plates during welding by adopting advanced welding technologies and processes, such as precise control of welding heat input, unique welding sequence and method, and pre-deformation treatment before welding. This directly solves the difficulty of controlling thin plate welding deformation mentioned in the background technology and improves the accuracy and stability of the bridge structure.

[0050] (2) Innovation of pre-deformation control method: By introducing the pre-deformation control method in the manufacturing process of the side beams and the middle cross beams, this solution can pre-set the deformation trend of the material before welding and place the welding shrinkage allowance in advance, so as to achieve the expected shape and size after welding; this method reduces the workload of subsequent corrections and improves production efficiency, while also solving the pre-deformation control problem mentioned in the background technology;

[0051] (3) Precise control of the positioning accuracy of the lifting lugs: The measurement before and after the welding of the lifting lugs and the method of adjusting the Cladding bracket based on the lifting lugs ensure the accuracy of the lifting lug position and the stability of the structure. For the expansion joint positions that need to be coordinated, we control the corresponding dimensions to ensure the final installation of the aluminum-plastic panel without trial installation, thus providing a guarantee for the safe suspension of the bicycle viaduct.

[0052] (4) Optimization of the connection between small segments: By optimizing the connection between small segments, this solution achieves precise matching and stable connection between beam segments. This not only improves the integrity and durability of the structure, but also solves the problem of small segment connection mentioned in the background technology, ensuring the long-term stable use of the bridge.

[0053] (5) Improvement of construction efficiency and precision: By prefabricating the main components such as side beams and cross beams and assembling them into components as much as possible, the construction efficiency is significantly improved. At the same time, the upper cladding bracket is made using angle inspection templates and full templates to ensure the assembly accuracy of the side beams, side plates and cross beam slopes, reducing the workload and time of on-site adjustments, thereby reducing construction costs. By accurately controlling welding deformation and optimizing connection methods, the side beam anti-deformation tooling controls the size after forming, reducing subsequent correction and adjustment work, further improving construction efficiency.

[0054] (6) Improvement of structural safety and durability: Through the above measures, this scheme significantly improves the structural safety and durability of the bicycle viaduct; precise welding deformation control and lug positioning accuracy ensure the stability of the bridge structure, while the optimized connection and coordination method ensures the reliability of the bridge in long-term use;

[0055] (7) Enhanced environmental protection and aesthetics: The thin plate material and cladding aluminum-plastic baffle used in this scheme not only reduce the weight of the bridge and improve the efficiency of material use, but also enhance the appearance of the bridge, meeting the requirements of modern cities for environmental protection and aesthetics;

[0056] (8) Maximizing space utilization: No additional ground space is occupied and the space between urban viaducts is fully utilized;

[0057] (9) Optimize connection and assembly: Pre-drilling of cladding brackets and connecting steel, as well as assembly of node plates, reduces the workload of on-site hole matching and improves assembly efficiency. At the same time, the use of templates for the assembly of countersunk holes ensures the installation accuracy of the countersunk holes.

[0058] (10) Ensure the consistency of structural line shape and size: By placing the remaining holes in the ring parts in advance during the trial assembly, this solution ensures the consistency of the line shape between the beam segments, eliminates the impact of the deviation of a single segment during the manufacturing process, and improves the integrity and aesthetics of the structure;

[0059] (11) Reduce costs and risks: The handrail support plate is made using simple devices, which saves costs, improves quality and construction efficiency, and reduces safety risks;

[0060] In summary, the beneficial effects of this solution closely correspond to the problems raised in the background technology. Through technological innovation and method optimization, it effectively solves the deficiencies in the existing technology and provides an efficient, safe and economical solution for the manufacture of urban bicycle viaducts. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0062] Figure 1 Schematic diagram of the beam segment structure of the embodiment of the present invention Figure 1 .

[0063] Figure 2 Schematic diagram of the beam segment structure of the embodiment of the present invention Figure 2 .

[0064] Figure 3 Schematic diagram of the beam segment structure of the embodiment of the present invention Figure 3 .

[0065] Figure 4 Schematic diagram of the beam segment structure of the embodiment of the present invention Figure 4 .

[0066] Figure 5 It is a schematic diagram of the top plate outer side angle inspection template according to an embodiment of the present invention.

[0067] Figure 6 It is a schematic diagram of the top plate inner side angle inspection template according to an embodiment of the present invention.

[0068] Figure 7 This is a schematic diagram of the use of the top plate angle inspection template according to an embodiment of the present invention.

[0069] Figure 8 Schematic diagram of the outer side angle inspection template of the edge plate according to an embodiment of the present invention.

[0070] Fig. 9 Schematic diagram of the inner side angle inspection template of the edge plate according to an embodiment of the present invention.

[0071] Fig.10 This is a schematic diagram of the use of the edge panel angle inspection template according to an embodiment of the present invention.

[0072] Fig.11 It is a schematic diagram of the top plate anti-deformation tooling arranged at the notch position according to an embodiment of the present invention.

[0073] Fig.12 Schematic diagram of an anti-deformation tooling according to an embodiment of the present invention.

[0074] Fig.13 This is a schematic diagram of the use of the I-beam angle inspection template according to an embodiment of the present invention.

[0075] Fig.14 It is a schematic diagram of a pressing tool according to an embodiment of the present invention.

[0076] Fig.15 It is a schematic diagram of the upper Cladding support according to an embodiment of the present invention.

[0077] Fig.16 Schematic diagram of the lower Cladding support according to an embodiment of the present invention.

[0078] Fig.17 It is a schematic diagram of the upper Cladding support inspection template according to an embodiment of the present invention.

[0079] Fig.18 It is a schematic diagram of the lower Cladding support inspection template according to an embodiment of the present invention.

[0080] Fig.19 It is a schematic diagram of a nut welding tooling according to an embodiment of the present invention.

[0081] Fig. 20 Schematic diagram of a Cladding bracket with lifting ears according to an embodiment of the present invention.

[0082] Fig.21 It is a schematic diagram of the ring position structure of an embodiment of the present invention.

[0083] The reference numerals are: 1, side beam; 2, middle cross beam; 3, upper cladding bracket; 4, lower cladding bracket; 5, bridge deck; 6, flange plate; 7, node plate; 8, T-shaped steel; 9, angle steel; 10, lifting lug;

[0084] 101, top plate; 102, bottom plate; 103, web plate; 105, curb plate support; 106, notch; 107, rib plate;

[0085] 1041, upper pallet; 1042, lower pallet; 1043, pledge;

[0086] 11. Handrail; 15. Curb board; 16. Handrail support; 17. Handrail tube connecting plate; 18. Ring bridge deck; 19. Ring connecting plate. DETAILED DESCRIPTION

[0087] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0088] Example 1

[0089] The present invention provides a bicycle viaduct attached to a city viaduct, comprising a bridge body of a truss structure, wherein the bridge body comprises a componentized assembly of a side beam 1, an intermediate cross beam 2, and a cladding bracket;

[0090] The side beam 1 is located on both sides of the bridge body, and the side beam 1 is an I-beam structure;

[0091] The middle cross beam 2 is connected by I-beams and angle steels 9 to form a frame structure, and the bridge deck 5 is laid on the top to form a bottom frame;

[0092] Cladding brackets and Cladding aluminum-plastic baffles are provided on both sides and the bottom of the beam segment. The segments are connected by connecting plates and bolts, and the bridge deck is connected by countersunk bolts.

[0093] The Cladding bracket includes an upper Cladding bracket 3 and a lower Cladding bracket 4;

[0094] The upper Cladding bracket 3 is used as a mounting bracket for the aluminum-plastic panel. A flange plate 6 is provided on one side of the bottom, and a handrail support assembly is provided on one side of the middle. The handrail support assembly includes a handrail support 16. A handrail tube connecting plate 17 is provided on one side of the handrail support 16. A handrail railing 11 is provided on the handrail tube connecting plate 17. The top of the upper Cladding bracket 3 is connected to the angle steel 9 through a node plate 7; the upper Cladding bracket 3 and the lower Cladding bracket 4 are connected to the side beam 1 through the flange plate 6 by bolts, the lower Cladding bracket is longitudinally connected to the T-shaped steel 8 by the node plate 7 and bolts, and the upper Cladding bracket 3 is connected to the angle steel 9 by the node plate 7 and bolts. Figure 15 to Figure 16 shown.

[0095] The bridge deck 5 is made of 6mm steel plate;

[0096] The steel plates used in this bridge are generally thinner. Except for the 25mm and 30mm thick steel plates at the lug 10 position, the rest are 6mm and 10mm steel plates.

[0097] Based on a manufacturing method of a bicycle viaduct attached to an urban viaduct, the overall manufacturing process is as follows:

[0098] The side beam 1, the middle cross beam 2, the upper Cladding bracket 3 and the lower Cladding bracket 4 are assembled into components; the side beam 1, the middle cross beam 2 and the bridge deck 5 are assembled into a frame structure, and the holes on the side beam are drilled using the holes of the Cladding bracket flange plate 6 as a template. After the drilling is completed, the lower Cladding bracket 4 is assembled for trial, and the upper Cladding bracket 3 is assembled for trial;

[0099] In order to reduce the workload of on-site hole matching, the holes of the cladding bracket flange plate 6, the connected node plate 7, the longitudinally connected T-shaped steel 8 with holes, and the longitudinally connected angle steel 9 are opened in advance; considering the reasons for trial assembly, the cladding bracket and the flange plate 6 are not assembled, and the node plate 7 and the connecting parts are not assembled first. After the trial assembly, they are assembled and welded according to the actual position, such as Figures 1 to 4 shown.

[0100] When the side beam 1 is manufactured, the side beam 1 is divided into a top plate 101, a bottom plate 102, and a web plate 103. A plurality of evenly distributed curb plate supports 105 are arranged on one side of the web plate 103, a plurality of evenly distributed notches 106 are opened on one side of the top plate 101, and a plurality of evenly distributed rib plates 107 are arranged on one side of the top plate 101. When the top plate 101, the bottom plate 102, and the web plate 103 are cut, a 2‰ welding shrinkage allowance is added to the drawing size, and a 20mm allowance is added to both ends of the side beam 1 for the final ring matching; Figure 2 As shown;

[0101] The top plate 101 and the web plate 103 need to be assembled first, and a 2mm gap is placed at the annular seam during assembly to cope with welding shrinkage; after the assembly is completed, they are assembled into an I-beam on the ship-shaped tire frame, and an angle inspection template is used for inspection during assembly, such as Fig.13 As shown, ensure that the angle between the edge beam top plate 101 and the web 103 meets the requirements; the two angles of the angle inspection template correspond to the angles between the two sides of the web 103 and the top plate 101, such as Figures 5 to 10 As shown, this can quickly check whether the assembly angle meets the requirements, while avoiding the errors caused by the common inspection method of measuring the distance of a certain point by calculation;

[0102] After assembly, a semi-automatic welding robot is used to weld on the ship-shaped tire frame to reduce welding deformation. At the same time, in order to speed up production efficiency and reduce the workload of correction after welding, the bottom plate 102 is pre-bent by a hydraulic press before assembly to give reverse deformation. During assembly, the reverse deformation tooling is used to lock the shape, such as Figure 11 to Figure 12 As shown;

[0103] Before assembly, the top plate 101 is anti-deformed by using the anti-deformation tooling set in the notch to ensure that the top and bottom plates can meet the flatness requirements after welding. The anti-deformation tooling consists of a clamping plate and a wedge block. The wedge block can be knocked to control the anti-deformation amount according to the actual situation;

[0104] The card plate includes an upper card plate 1041 and a lower card plate 1042;

[0105] The wedge-shaped block includes a wedge 1043;

[0106] At the same time, in order to facilitate on-site adjustments during trial assembly, the welds within 300mm of the side beam ends are not welded until the ring position is adjusted during trial assembly.

[0107] When the middle cross beam 2 was manufactured, in order to reduce the impact of welding deformation and ensure the camber of the bridge deck, a margin was placed in the middle of the middle cross beam under the premise of the original drawing requirements when installing the middle cross beam to ensure the final lateral upward deflection. When the middle cross beam was assembled, a pre-camber of +12mm was placed in the middle, the flange plate in the length direction was +10mm, and the lower flange plate was +6mm, so as to eliminate the shrinkage deformation of the bridge deck welding. Before and after welding, an inspection template with pre-camber and in line with the theoretical size of the drawing was made for inspection after assembly and welding respectively;

[0108] In order to ensure the size of the welding hole of the middle beam and the alignment of the bottom plate during assembly, a welding hole tooling was designed to ensure the size of the welding hole. At the same time, the steps of first cutting the bottom plate flange and then trimming the welding hole were specified to ensure that the shape and clearance of the welding hole meet the requirements during assembly.

[0109] When the Cladding bracket is manufactured, the Cladding bracket is divided into an upper Cladding bracket 3 and a lower Cladding bracket 4. In order to reduce the workload of drilling holes, the holes on the Cladding bracket are all opened by laser; at the same time, the flange plate 6 is drilled by CNC to ensure the accuracy of the holes; in order to facilitate later adjustment, the Cladding bracket and the flange plate 6 are not welded, and welding is performed after the installation and adjustment of the Cladding bracket are completed;

[0110] The upper cladding support 3 is made with a full-size inspection template, such as Fig.17 As shown, the curvature of the upper Cladding bracket 3 is ensured to facilitate subsequent control; for the convenience of adjustment and installation of the guardrail, the flange plate 6 is not assembled with the Cladding bracket, and the flange plate 6 is directly spot welded on the side beam web plate with the hole drilled on the side beam, and the top angle steel 9 connects the node plate 7 and the bracket for spot welding, which can be adjusted later according to the actual position of the angle steel 9, and the handrail support is spot welded without welding. After the handrail pipe is installed and adjusted in place, it is assembled and welded according to the actual position; the handrail pipe connecting plate is first installed on the handrail, and assembled and welded on the handrail support according to the actual position;

[0111] The armrest support plate is arc-shaped, and the hole is opened by laser, which reduces the workload of opening the hole. Due to its small size, there are safety risks in using a bending machine or a punching machine, and the accuracy cannot be guaranteed. This solution makes a small pressing tool, using a jack and a simple mold to press, such as Fig.14 As shown, it can be completed by a single person, and the efficiency is also improved; in order to eliminate the problem that the aperture of the support plate after bending is smaller at the top and larger at the bottom, the holes on the support plate after bending are reamed twice to ensure that the aperture is consistent from top to bottom and meets the requirements;

[0112] The lower Cladding bracket 4 is made by using the inspection template for inspection, such as Fig.18As shown, the node plate 7 is spot welded on the bracket. After the T-shaped steel 8 connected in the middle is installed and adjusted in place, the position of the node plate 7 can be adjusted according to the actual position for welding; the flange plate 6 is not assembled with the Cladding bracket, and the flange plate 6 is directly spot welded on the web of the side beam with the hole drilled on the side beam. The Cladding bracket is adjusted in place and welded to connect the welds; the holes on the Cladding bracket are all opened by laser, and a welding shrinkage allowance of 1‰ is placed for the hole spacing. After welding, the measured spacing size deviation is less than 1mm, which meets the requirements.

[0113] When assembling the water collecting tank, in order to ensure that the water collecting tank and the water collecting tank seat can be matched smoothly, the water collecting tank and the support are drilled using a drill template after being welded to ensure that they can be interchangeable. At the same time, in order to ensure the fit, the flatness of the water collecting tank support and the water collecting tank connection surface is required to be 1mm.

[0114] The lower cladding bracket panel and the ring angle steel 9 need to be welded with nuts. In order to accurately install the nuts and ensure the through-hole rate and the verticality of the nuts, a nut welding tool is designed to fix the nuts during welding. Fig.19 shown.

[0115] When assembling the beam section, it is necessary to set up two types of positive and negative frames according to the line type. The frames are adjusted according to the shrinkage required. Pre-biased values ​​are placed on the side beams on both sides, i.e. L1+6mm, L2+10mm, and the cross beam camber +12mm, to cope with the deformation caused by welding. For the curb plate 15 connected by the countersunk hole, a drilling template is used to drill holes to improve the drilling accuracy and ensure the replaceability. At the same time, the supports on both sides are installed with tooling to improve the assembly accuracy. When assembling, the vertical and horizontal reference lines are determined by the longitudinal and transverse centers of the beam section. When assembling the bottom frame, it is assembled from the middle to both sides, and the welding sequence is also from the middle to both sides, which helps to eliminate welding stress and reduce welding deformation.

[0116] In order to improve efficiency, the trial installation of the upper cladding bracket and the lower cladding bracket of a single segment is completed in the workshop. This type of bridge is fixed by hanging rod lifting. The position of the lifting lug 10 is more important, such as Fig. 20As shown, when trial-installing the upper Cladding bracket, the Cladding bracket with the lifting ear 10 is used as a reference, and the Cladding bracket is installed based on the two lifting ears, and the spacing is controlled. The installation accuracy of the lifting ear 10 is repeatedly adjusted through precise measurement; because the aluminum-plastic plate wrapped on the outside of the Cladding bracket cannot be assembled for trial, it is necessary to control the spacing of the Cladding bracket to ensure that the aluminum-plastic plate can be installed; due to the special structure, the Cladding brackets need to control the positioning dimensions between each other, including the relative position of the upper Cladding bracket and the lower Cladding bracket, the opening distance and the upper and lower positions between the Cladding brackets, and the axis of the upper Cladding bracket and the lower Cladding bracket should be kept as flush as possible, and the maximum deviation cannot be greater than 4mm; the lateral spacing deviation of the Cladding bracket is controlled within the range of ±4mm without affecting the installation of the aluminum-plastic plate; because there is a deviation in the production of the beam section, all the Cladding brackets are installed during trial installation, and then adjusted as a whole to meet the requirements;

[0117] This type of bridge has high requirements for appearance, so while meeting the installation requirements, it is also necessary to take aesthetics into consideration. The aluminum-plastic panel should be kept as flat as possible, and the hole spacing is measured by using the wires at both ends as a reference to control the elevation deviation of the Cladding bracket within ±3mm. The requirements can be met by adjusting the position of the aluminum-plastic panel.

[0118] During the field trial assembly, the beam segments are assembled in the field according to the rounds. First, the two ends of a round are leveled according to the bridge position line type, and a coordinate system is established. The coordinates of the corresponding trial assembly frame are given, and the beam segments are hoisted onto the frame. The position of the beam segments is adjusted, and the trial assembly holes of the bridge deck 18 and the curb plate 15 at the beam segment ring mouth and the matching holes of the ring mouth connecting plate 19 are completed. Fig.21 As shown, the bottom T-shaped steel 8, the top angle steel 9 and the middle handrail tube are longitudinally connected at the ring position, and the handrail support assembly on the upper Cladding bracket is welded; the EJ component needs to be trial-installed at the expansion joint end, the spacing needs to be measured, and the lap-type bridge deck and the side beam cover need to be trial-installed; among them, the top connecting angle steel 9 of the ring mouth, the bottom connecting T-shaped steel 8, and the curb plate 15 at the ring mouth are all +20mm in the length direction for adjustment, and the bridge deck width +20mm is used for adjustment; the angle steel 9, T-shaped steel 8 and curb plate 15 at the ring mouth are different from other holes that are drilled first. They are equipped with holes according to the actual position, and the bridge deck is equipped with holes according to the actual situation. After the ring mouth is matched, the corresponding data is measured and the holes are equipped after trimming according to the actual size; the connecting plate is drilled first, and after the beam segment is adjusted into place, the connecting plate is fixed with a C-type clamp, and the holes on the beam segment are drilled with the connecting plate as a template, thereby improving the accuracy of the linear shape between the beam segments. Example 2

[0119] Based on Example 1, the assembly requirements of the water collecting tank connection base are as follows:

[0120] 1) The water collecting tank connection seat is cut according to the drawing and inspected to be qualified;

[0121] 2) The water collecting tank connection seat is assembled according to the markings on the drawing. During assembly, the bottom surface of the support must be flush. After the size inspection is qualified, welding is carried out in accordance with WPS and correction is performed after welding.

[0122] 3) After the size inspection of the sump connection seat is passed, use the drilling template to drill holes. After the drilling inspection is passed, the connection seat is assembled into the frame.

[0123] Water collecting tank assembly requirements:

[0124] 1) After the water collecting tank is cut according to the drawing, the steel plate is bent and formed, and the inspection is qualified;

[0125] 2) The water collecting tank shall be assembled according to the markings on the drawing. The top surface shall be level during assembly. After the size inspection is qualified, welding shall be carried out in accordance with WPS and correction shall be made after welding.

[0126] 3) After the size of the water collecting tank is inspected and qualified, use the drilling template to drill the top surface connection holes. After the drilling holes are inspected and qualified, the water collecting tank will be transferred to the next process for trial assembly.

[0127] Other requirements for water collecting tanks and connection sockets are as follows:

[0128] 1) The flatness of the connection surface between the top surface of the water collecting tank and the bottom surface of the connecting seat is ≤1mm;

[0129] 2) The internal flatness of the water collection tank is ≤1mm. Example 3

[0130] On the basis of Example 1, in order to facilitate welding and grinding during assembly, the parts are turned over several times:

[0131] 1) In order to ensure that the welds of the longitudinal connecting angle steel 9 can meet the P3 requirements, the frame is erected, the joint welds of the middle beam and the side beam are welded, the vertical seams and flat seams of the clamping plate and the sealing plate support on the upper part of the beam are welded, and the first turn-over is carried out;

[0132] 2) After the first turn-over, weld the welds of the middle cross beam and the longitudinal connecting angle steel 9, grind the welds until they meet the P3 requirements, and weld the welds of the clamping plate and the sealing plate support on the upper part of the cross beam and the side beam;

[0133] 3) After the longitudinal angle steel 9 connection welds meet the requirements, weld the welds of the middle beam flange plate and the bottom of the side beam bottom plate, and the welds of the T-plate and the middle beam and the side beam flange plate; after the welding and grinding meet the requirements, turn over for the second time and install the bridge deck;

[0134] 4) After the second turn, position the bridge deck according to the drawing, spot weld it firmly and turn it over again;

[0135] 5) After the third turning, the segmental welding of the bottom of the bridge deck is welded, including the segmental welding of the cross beam and the longitudinal angle steel 9, and the remaining welds on the reverse side are welded;

[0136] 6) Turn over for the fourth time, weld the top weld of the bridge deck, weld the remaining welds, and correct the beam section;

[0137] 7) Turn over for the fifth time, install the bottom channel steel, weld the bottom channel steel, test-install the lower cladding bracket, and weld the flange plate 6 and the node plate 7;

[0138] 8) Turn over for the sixth time, test-assemble and adjust the upper cladding bracket, and weld the flange plate 6 and the node plate 7;

[0139] After production, the requirements are: lateral deviation ≤4mm, camber deviation ≤2mm, twist deviation ≤4mm, length deviation ≤2mm, width deviation ≤2mm, diagonal deviation ≤4mm, bridge deck flatness ≤2mm;

[0140] The method of using this solution involves the following steps:

[0141] Design phase: Design the layout and structure of the bicycle viaduct based on the structure and space of the existing viaduct.

[0142] Prefabricated components: Prefabricated side beams, middle beams, cladding brackets and other components in the factory.

[0143] On-site installation: The prefabricated components are transported to the site and the bicycle viaduct is fixed to the existing viaduct using hangers.

[0144] Connection and adjustment: Precise connection and adjustment ensure that the bicycle viaduct can be seamlessly integrated with the existing viaduct.

[0145] Safety inspection: After installation is completed, a structural safety inspection is carried out to ensure the safe use of the bicycle viaduct.

[0146] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for manufacturing a bicycle viaduct attached to an urban viaduct, characterized in that: The bicycle viaduct comprises a bridge body of a truss structure, wherein the bridge body comprises a componentized assembly of side beams (1), a middle cross beam (2), and a cladding bracket; The side beams (1) are located on both sides of the bridge body, and the side beams (1) are I-beam structures; The middle cross beam (2) is an I-beam and an angle steel (9) connected to form a frame structure, and a bridge deck (5) is laid on the top to form a bottom frame; Cladding brackets and Cladding aluminum-plastic baffles are provided on both sides and the bottom of the beam segment. The segments are connected by connecting plates and bolts, and the bridge deck is connected by countersunk bolts. The cladding bracket comprises an upper cladding bracket (3) and a lower cladding bracket (4); The upper Cladding bracket (3) serves as a mounting bracket for the aluminum-plastic panel, and is provided with a flange plate (6) on one side of the bottom, and a handrail support assembly is provided on one side of the middle, wherein the handrail support assembly comprises a handrail support (16), a handrail tube connecting plate (17) is provided on one side of the handrail support (16), and a handrail railing (11) is provided on the handrail tube connecting plate (17); the top of the upper Cladding bracket (3) is connected to the angle steel (9) via a node plate (7); the upper Cladding bracket (3) and the lower Cladding bracket (4) are connected to the side beam (1) via the flange plate (6) by means of bolts, the lower Cladding bracket is longitudinally connected to the T-shaped steel (8) by means of the node plate (7) and bolts, and the upper Cladding bracket (3) is connected to the angle steel (9) by means of the node plate (7) and bolts; The manufacturing method of the bicycle viaduct attached to the urban viaduct has the following general manufacturing process: The side beam (1), the middle cross beam (2), the upper cladding support (3) and the lower cladding support (4) are assembled into components; the side beam (1), the middle cross beam (2) and the bridge deck (5) are assembled into a frame structure, and holes on the side beam are drilled using the holes of the cladding support flange plate (6) as a template. After the drilling is completed, the lower cladding support (4) is assembled for trial, and the upper cladding support (3) is assembled for trial; Holes of the cladding bracket flange plate (6), the connected node plate (7), the longitudinally connected T-shaped steel with holes (8), and the longitudinally connected angle steel (9) are opened in advance.

2. The method for manufacturing a bicycle viaduct attached to an urban viaduct according to claim 1, characterized in that: When the side beam (1) is manufactured, the side beam (1) is divided into a top plate (101), a bottom plate (102), and a web plate (103); a plurality of evenly distributed curb plate supports (105) are arranged on one side of the web plate (103); a plurality of evenly distributed notches (106) are opened on one side of the top plate (101); and a plurality of evenly distributed rib plates (107) are arranged on one side of the top plate (101); when the top plate (101), the bottom plate (102), and the web plate (103) are cut, a welding shrinkage allowance of 2‰ is added to the drawing size, and a 20 mm allowance is added to both ends of the side beam (1) for final ring matching; The top plate (101) and the web plate (103) need to be assembled first, and a gap of 2 mm is placed at the annular seam during assembly to cope with welding shrinkage; after the assembly is completed, the I-beam is assembled on the ship-shaped tire frame, and an angle inspection template is used to inspect during assembly to ensure that the angle between the side beam top plate (101) and the web plate (103) meets the requirements; the two angles of the angle inspection template correspond to the angles between the two sides of the web plate (103) and the top plate (101); After assembly, a semi-automatic welding robot is used to weld on the ship-shaped tire frame; at the same time, the bottom plate (102) is pre-bent by a hydraulic press before assembly to give a reverse deformation, and the reverse deformation tooling is used to fix the shape during assembly; Before assembly, the top plate (101) is anti-deformed by using an anti-deformation tooling arranged in a notch to anti-deform the top plate (101) of the side beam (1), wherein the anti-deformation tooling is composed of a clamping plate and a wedge block; The card plate comprises an upper card plate (1041) and a lower card plate (1042); The wedge-shaped block includes a wedge (1043); At the same time, the welds within 300mm of the side beam end have not been welded and will be welded after trial assembly and adjustment of the ring position.

3. The method for manufacturing a bicycle viaduct attached to an urban viaduct according to claim 2, characterized in that: When the middle cross beam (2) was manufactured, a margin was placed in the middle of the middle cross beam when it was installed, based on the original drawing requirements. When the middle cross beam was assembled, a pre-arch of +12mm was placed in the middle, a flange plate of +10mm in the length direction, and a lower flange plate of +6mm. Before and after welding, an inspection template with a pre-arch and in accordance with the theoretical dimensions of the drawing was made, and inspection was carried out after assembly and welding respectively; During assembly, the base plate is aligned, and the welding hole tooling is set to ensure the size of the welding hole. At the same time, the steps of first cutting the base plate flange and then trimming the welding hole are specified to ensure that the shape and clearance of the welding hole meet the requirements during assembly.

4. The method for manufacturing a bicycle viaduct attached to an urban viaduct according to claim 3, characterized in that: When the Cladding bracket is manufactured, the Cladding bracket is divided into an upper Cladding bracket (3) and a lower Cladding bracket (4), and the holes on the Cladding bracket are all opened by laser. At the same time, the flange plate (6) is drilled by CNC. In order to facilitate later adjustment, the Cladding bracket and the flange plate (6) are not welded, and welding is performed after the Cladding bracket is installed and adjusted. When manufacturing the upper Cladding bracket (3), a full-size inspection template is used to ensure the curvature of the upper Cladding bracket (3) to facilitate subsequent control; the flange plate (6) is directly spot welded on the web of the side beam and the hole drilled on the side beam is drilled; the top angle steel (9) connects the node plate (7) and the bracket and is spot welded, and then adjusted according to the actual position of the angle steel (9); the handrail support is spot welded, but not welded. After the handrail pipe is installed and adjusted in place, it is assembled and welded according to the actual position; the handrail pipe connecting plate is first installed on the handrail, and then assembled and welded on the handrail support according to the actual position; The handrail support plate is arc-shaped, and the hole is opened by laser. Due to its small size, a small pressing tool is set up, and it is pressed using a jack and a mold; in order to eliminate the problem that the hole diameter of the support plate is smaller at the top and larger at the bottom after bending, the hole on the support plate after bending is reamed twice to ensure that the hole diameter is consistent from top to bottom and meets the requirements; The lower cladding bracket (4) is manufactured by using an inspection template for inspection. The node plate (7) is spot welded on the bracket. After the intermediate connecting T-shaped steel (8) is installed and adjusted in place, the position of the node plate (7) is adjusted according to the actual position for welding. The flange plate (6) is not assembled with the cladding bracket. The flange plate (6) is directly spot welded on the web of the side beam and a hole is drilled on the side beam. The cladding bracket is adjusted in place and welded to the weld. The holes on the cladding bracket are all opened by laser. The hole spacing is set with a welding shrinkage allowance of 1‰. After welding, the spacing size deviation is measured to be less than 1mm, which meets the requirements.

5. The method for manufacturing a bicycle viaduct attached to a city viaduct according to claim 4, characterized in that: When assembling the water collecting tank, a drilling template is used to drill holes after the water collecting tank and the support are welded. At the same time, a 1mm flatness requirement is made for the water collecting tank support and the water collecting tank connection surface.

6. The method for manufacturing a bicycle viaduct attached to a city viaduct according to claim 5, characterized in that: The lower cladding support panel is welded with nuts at the ring angle steel (9), and a nut welding tool is provided to fix the nuts during welding.

7. The method for manufacturing a bicycle viaduct attached to an urban viaduct according to claim 6, characterized in that: When assembling the beam segments, two types of positive and negative frames need to be set up according to the line shape. The frames are adjusted according to the shrinkage required. Pre-biased values ​​are placed on the side beams on both sides, i.e. L1+6mm, L2+10mm, and the cross beam camber +12mm, to cope with the deformation caused by welding. For the curb plate (15) connected by the countersunk hole, a drilling template is used to drill holes, and the supports on both sides are installed using a tool. When assembling, the longitudinal and transverse reference lines are determined by the longitudinal and transverse centers of the beam segments. When assembling the bottom frame, it is assembled from the middle to the sides, and the welding sequence is also from the middle to the sides. During assembly, in order to facilitate welding and grinding, turn the machine over several times: 1) In order to ensure that the welds of the longitudinal connecting angle steel (9) can meet the P3 requirement, after the frame is erected, the joint welds of the middle cross beam and the side beam are welded, the vertical welds and the flat welds of the bracket and the cover support on the upper part of the cross beam are welded, and the first turn-over is carried out; 2) After the first turn-over, weld the welds of the middle cross beam (2) and the longitudinal connecting angle steel (9), grind the welds until they meet the P3 requirements, and weld the welds of the clamping plate and the cover plate support on the upper part of the cross beam and the side beam; 3) After the longitudinal angle steel (9) connection welds meet the requirements, weld the welds of the middle cross beam flange plate and the bottom of the side beam bottom plate, and the welds of the T-plate and the middle cross beam and the side beam flange plate; after the welding and polishing meet the requirements, turn over for the second time and install the bridge deck; 4) After the second turn, spot weld the bridge deck according to the drawing, and turn it over again after the spot welding is firm; 5) After the third turning over, the segmental welding of the bottom of the bridge deck is welded, including the segmental welding of the cross beam and the longitudinal angle steel (9), and the remaining welds on the reverse side are welded; 6) Turn over for the fourth time, weld the top weld of the bridge deck, weld the remaining welds, and correct the beam section; 7) Turn over for the fifth time, install the bottom channel steel, weld the bottom channel steel, test-install the lower cladding bracket, and weld the flange plate (6) and the node plate (7); 8) Turn over for the sixth time, test-assemble and adjust the upper cladding bracket, and weld the flange plate (6) and the node plate (7); After production, the requirements are: lateral deviation ≤4mm, camber deviation ≤2mm, twist deviation ≤4mm, length deviation ≤2mm, width deviation ≤2mm, diagonal deviation ≤4mm, bridge deck flatness ≤2mm; The trial installation of the upper Cladding bracket and the lower Cladding bracket of a single segment is completed in the workshop. When the upper Cladding bracket is trial installed, the Cladding bracket with the lifting ear (10) is used as the reference, and the Cladding bracket is installed with the two lifting ears as the reference, and the spacing is controlled. The installation accuracy of the lifting ear (10) is repeatedly adjusted through precise control measurement; the Cladding brackets need to control the positioning dimensions between each other, including the relative position of the upper Cladding bracket and the lower Cladding bracket, the spacing and the upper and lower positions between the Cladding brackets, and the axis of the upper Cladding bracket and the lower Cladding bracket is guaranteed to be flush, and the maximum deviation cannot be greater than 4mm; the lateral spacing deviation of the Cladding bracket is controlled within the range of ±4mm; because there is a deviation when the beam segment is manufactured, all the Cladding brackets are installed and adjusted as a whole to meet the requirements during the trial installation; The aluminum-plastic panel is guaranteed to be flush, and the hole distance is measured by using the wires at both ends as a reference to control the elevation deviation of the Cladding bracket within ±3mm.

8. The method for manufacturing a bicycle viaduct attached to an urban viaduct according to claim 1, characterized in that: During the field trial assembly, the beam segments are assembled in the field according to the rounds. First, the two ends of a round are leveled according to the bridge position line type, and a coordinate system is established. The coordinates of the corresponding trial assembly frame are given, and the beam segment is hoisted onto the frame. The position of the beam segment is adjusted, and the bridge deck (18) and the curb plate (15) at the beam segment ring are completed. The holes of the ring connection plate (19) are matched, and the bottom T-shaped steel (8), the top angle steel (9) and the middle handrail pipe are longitudinally connected at the ring position. The handrail support assembly on the upper cladding bracket is welded; the EJ component needs to be trial-assembled at the expansion joint end, the spacing is measured, and the trial assembly overlap is completed. The bridge deck and the side beam cover are provided with a bridge deck having a plurality of holes. The angle steel (9) connected to the top of the ring, the T-shaped steel (8) connected to the bottom, and the curb plate (15) at the ring are all +20 mm in the length direction for adjustment, and the bridge deck width is +20 mm for adjustment. The angle steel (9), T-shaped steel (8) and curb plate (15) at the ring are provided with holes according to the actual position, and the bridge deck is provided with holes according to the actual situation. After the ring is matched, the corresponding data is measured and the holes are provided after trimming and cutting according to the actual size. The connection plate is first drilled, and after the beam section is adjusted into place, the connection plate is fixed with a C-shaped clamp, and the holes on the beam section are drilled using the connection plate as a template.

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