Split type ultra-wide lattice structure bridge deck plate structure and manufacturing method thereof

Abstract

The invention discloses a split type ultra-wide lattice structure bridge deck plate structure and a manufacturing method thereof, and relates to the technical field of large steel bridge manufacturing, the bridge deck plate structure comprises a plurality of node bridge deck plates and a plurality of internode bridge deck plates, and the side faces of the node bridge deck plates are matched with the side faces of the internode bridge deck plates; the node bridge deck plate comprises a node bridge deck unit; the plurality of node longitudinal beams are mounted on the node bridge deck units; the node cross beams are mounted on the node bridge deck units, and the node cross beams are connected with the node longitudinal beams; the inter-segment bridge deck plate comprises an inter-segment bridge deck unit; the plurality of internode longitudinal beams are mounted on the internode bridge deck units; and the inter-section transverse ribs are mounted on the inter-section bridge deck units, and the inter-section transverse ribs are connected with the inter-section longitudinal beams. The invention further discloses a manufacturing method of the bridge floor plate structure. The technical problems that an existing split type ultra-wide lattice structure bridge deck plate is difficult to manufacture, and the matching precision cannot be guaranteed are solved.

Description

Technical Field

[0001] The invention relates to the technical field of large steel bridge manufacturing, and in particular to a split ultra-wide lattice bridge deck block structure and a manufacturing method thereof. Background Art

[0002] For bridges across rivers, seas, mountain valleys, etc., long-span steel bridges are an inevitable trend in the development of modern bridges. Considering cost savings and multiple uses of one bridge, the width of the bridge is also increasing, which greatly increases the difficulty of manufacturing and erecting steel bridges, accompanied by higher and higher requirements for the lifting capacity of lifting equipment. In order to reduce the excessive dependence on lifting equipment, some steel bridges are manufactured in blocks using the "break the whole into pieces" method, and then connected as a whole when the bridge is installed. This method can effectively reduce the dependence on lifting equipment, but it greatly increases the difficulty of factory manufacturing of steel bridges, and the matching accuracy requirements between components are also greatly increased.

[0003] The existing channel bridge with a steel truss arch structure is divided into two layers, the bridge deck adopts a lattice structure, and needs to be divided into three sections for manufacturing, shipment and hoisting. After the bridge is hoisted into place, the three bridge deck blocks in each section need to be connected horizontally and vertically internally, and also need to be connected with the adjacent section bridge deck blocks and the outer chord. There are many matching interfaces and complex connection relationships, which requires very high factory manufacturing accuracy. Therefore, how to effectively control the factory manufacturing accuracy of the split-type ultra-wide lattice bridge deck block structure and ensure the matching accuracy between components is a key technology in steel bridge manufacturing, and it has also become a problem that needs to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to provide a split extra-wide lattice bridge deck block structure and a manufacturing method thereof, which solves the technical problems of the prior art that the split extra-wide lattice bridge deck blocks are difficult to manufacture and cannot ensure matching accuracy.

[0005] The embodiment of the present application discloses a split type ultra-wide grid-type bridge deck block structure, comprising a plurality of node bridge deck blocks and a plurality of inter-node bridge deck blocks, wherein the side surfaces of the node bridge deck blocks cooperate with the side surfaces of the inter-node bridge deck blocks; The node bridge deck block comprises: Node bridge deck unit; A plurality of node longitudinal beams are installed on the node bridge deck unit; A plurality of node cross beams are installed on the node bridge deck unit, and the node cross beams are connected to the node longitudinal beams; The inter-segment bridge deck block comprises: Intersegmental bridge deck units; A plurality of inter-segment longitudinal beams are installed on the inter-segment bridge deck units; Intersegmental transverse ribs are installed on the intersegmental bridge deck units, and the intersegmental transverse ribs are connected to the intersegmental longitudinal beams.

[0006] The present application divides the split type ultra-wide grid-shaped bridge deck block into a plurality of deck blocks, which facilitates subsequent processing and matching accuracy.

[0007] Based on the above technical solution, the embodiment of the present application can also be improved as follows: Furthermore, the node longitudinal beams, node transverse beams, internode longitudinal beams and internode transverse ribs are all T-shaped. The beneficial effect of adopting this step is to ensure the overall strength.

[0008] The present application also discloses a method for manufacturing a split type ultra-wide lattice bridge deck block structure, comprising: S1: Cutting and parts processing: cutting and processing materials to form various parts; S2: Production of node bridge deck units: On the assembly frame, multiple plate units are produced as a whole according to the length of multiple-sized materials and then divided. The specified length of multiple-sized materials is used to draw a longitudinal baseline according to the "uniform division method" of the plate width margin, and a transverse baseline is drawn perpendicular to the longitudinal baseline. The longitudinal rib position line and the position line of one end of the longitudinal rib of each bridge deck unit are drawn based on the longitudinal and transverse baselines. The U-shaped ribs and plate ribs are assembled based on the longitudinal rib position line and the longitudinal rib end position line, and then welding and flame cutting are performed to obtain the node bridge deck unit; S3: Fabrication of inter-segmental bridge deck unit: On the assembly frame, the specified double-sized materials are marked with a longitudinal baseline according to the "uniform division method" of the plate width margin, and a transverse baseline is marked perpendicular to the longitudinal baseline. The longitudinal rib position line and the longitudinal rib one end position line are marked based on the longitudinal and transverse baselines. The U-shaped ribs and plate ribs are assembled based on the longitudinal rib position line and the end position line, and then welding and flame cutting are performed to obtain the inter-segmental bridge deck unit; S4: Production of node longitudinal beams, node transverse beams, internode longitudinal beams and internode transverse ribs: Based on various reference lines, complete the production of node longitudinal beams, node transverse beams, internode longitudinal beams and internode transverse ribs respectively; S5: Bridge deck block matching and production: The bridge deck blocks are matched and produced in the reverse position using the "long line method", that is, the bridge deck blocks of multiple consecutive sections are matched and produced at the same time, and the position of the bridge deck blocks during production is opposite to that of the actual bridge; S6: Bridge deck welding: symmetrically weld all welds; S7: Decoding and marking: After the bridge deck block is welded, decoding and marking operations are performed; S8: Drilling and secondary flame cutting: After the marking is completed, drilling and flame cutting are performed; S9: Tire unloading and turning over: Use a flat car to unload the tire, and use a sling to turn over to complete the processing.

[0009] Based on the above technical solution, the embodiment of the present application can also be improved as follows: Furthermore, the specific steps of step S5 are as follows: S501: Measurement control network setting: Establish a measurement control network before the tire frame is made; S502: Tire frame design: Assemble the tire frame at an assembly site with sufficient foundation bearing capacity; S503: First locate the reference plate unit, then locate other bridge deck units, adopt "step-by-step" progressive positioning and assembly to complete the assembly of the bridge deck unit, then locate the node cross beams and node longitudinal beams to complete the assembly of the node bridge deck blocks, and finally locate the inter-node longitudinal beams and inter-node cross ribs to complete the assembly of the inter-node bridge deck blocks.

[0010] Furthermore, the step S502 further includes the following contents: When designing the assembled tire frame, the width direction of the tire frame must meet the width of the node bridge deck block while reserving a 1.5m safety passage, the length direction must meet the total length of the bridge deck block during matching production, the tire frame longitudinal beam spacing is arranged according to 4.0m to 5.0m, the cross beam spacing is arranged according to the cross beam and cross rib spacing of the bridge deck block, and the support plates on the tire frame are arranged at a spacing of 1.5m to 2.0m to ensure that the rigidity of the tire frame meets the requirements when under pressure; after the tire frame is arranged, use a level to check the tire frame to ensure that the height deviation of the tire frame support plate is controlled within ±1.0mm, and finally use a theodolite to lay out the longitudinal and transverse baselines on the tire frame.

[0011] Furthermore, the step S503 also includes the following contents: When the bridge deck unit is positioned and assembled, the longitudinal baseline of the bridge deck unit is related to the measuring tower and is uniformly controlled according to the "theoretical value + 2.0mm". The transverse baseline spacing between the internal plate units of the same interval is controlled according to the theoretical value, with a deviation of ≤1.0mm. The transverse baseline spacing between the bridge deck units of adjacent intervals is controlled according to the "theoretical value + 40.0mm", with a deviation of ≤1.0mm. If the deviation is exceeded, the cause must be found out before the next operation can be carried out. When positioning the plate unit, the misalignment of the butt joint must be controlled to be ≤0.5mm. After meeting the requirements, the longitudinal butt joint is positioned with a horse plate.

[0012] Furthermore, the step S503 also includes the following contents: When positioning the node beams and inter-node cross ribs, use angle templates to check verticality, and use non-destructive support to support them at a distance of ≤2.0m on both sides to ensure safety during construction; When positioning the node longitudinal beams and inter-section longitudinal beams, the verticality of the longitudinal beams is strictly controlled, the webs of the longitudinal beams are pressed tightly against the webs of the cross beams and the webs of the cross ribs, and the misalignment between the webs of the longitudinal beams and the long sides of the bridge deck is controlled to be ≤5.0mm.

[0013] Furthermore, the step S2 also includes the following contents: When marking the node bridge deck unit, any end of the steel plate is selected as the reference end of the deck unit, and the first horizontal baseline is marked in the length direction according to "theoretical length + 10mm" and perpendicular to the longitudinal baseline based on the end, and then other horizontal baselines are marked according to the first horizontal baseline at a spacing of "theoretical length + 10mm"; when the deck unit is assembled, the gap between the key U-shaped rib and the plate rib and the deck is ≤0.5mm, the maximum allowable local gap is 1.0mm, and the alignment deviation is ≤0.5mm; after the deck unit is welded, it is corrected, and the flatness after correction is required to be ≤1.5mm in the horizontal direction and ≤3.0mm in the vertical direction.

[0014] Furthermore, the step S3 also includes the following contents: When marking the inter-segment bridge deck unit, any end of the steel plate is selected as the trimming edge of the deck unit, and a horizontal baseline is drawn with the end as the standard length direction according to "theoretical length + 15mm" and perpendicular to the longitudinal baseline, and the part number and trimming edge mark are made with a paint pen at the specified position; when the deck unit is assembled, the gap between the key U-shaped ribs and the plate ribs and the deck is ≤0.5mm, the maximum allowable local gap is 1.0mm, and the alignment deviation is ≤0.5mm; the deck unit is corrected after welding, and the flatness after correction is required to be ≤1.5mm horizontally and ≤3.0mm vertically.

[0015] Furthermore, the step S9 also includes the following contents: during the tire removal and turning over, the lifting lugs are bolted to the horizontal stiffeners, using at least two punch pins and two high-strength bolts. During the turning over process, a trial lifting is performed first, and then the turning over is performed slowly and steadily to ensure safety during the turning over process.

[0016] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: 1. In the manufacturing method of the present application, for plate units with a length of less than 4.0m, they can be manufactured as a whole according to multiple-sized materials during production, and then flame cut for the second time after completion, so that multiple bridge panel units can be made at the same time, effectively improving the production efficiency of the plate units.

[0017] 2. In the manufacturing method of the present application, when the bridge deck unit is manufactured, the transverse and longitudinal reverse deformations are preset to ensure the transverse pre-deformation. At the same time, the longitudinal pre-deformation is also set in the length direction of the plate unit to ensure the accuracy of the bridge deck unit after welding, reduce the workload of thermal correction, and improve production efficiency.

[0018] 3. The application adopts the "long line method" in reverse production during matching and production, providing a new production method. At the same time, this method can effectively avoid overhead welding, control the transverse slope of the bridge deck, facilitate push-in assembly, improve the fatigue resistance of the steel bridge deck, and at the same time improve manufacturing accuracy and production efficiency.

[0019] 4. In the manufacturing method of the present application, a "step-by-step" progressive method is adopted when positioning and assembling the bridge deck unit. The bridge deck unit eliminates the deviation effect caused by welding and assembly by setting reasonable assembly deviations, thereby effectively ensuring the overall lateral width of the bridge deck block.

[0020] 5. In the manufacturing method of the present application, when the bridge deck unit is positioned and assembled, fixed horse plates are used to fix the transverse joints between nodes, and movable horse plates are used to fix the transverse joints between adjacent nodes. After the bridge deck blocks are completed and before marking and drilling, the bridge deck and the frame are partially decoded to release the welding shrinkage stress in the blocks, thereby effectively ensuring the dimensional accuracy of the bridge deck blocks and reducing deformation during storage due to stress.

[0021] 6. The manufacturing method disclosed in the present application determines the overall matching manufacturing scheme of the split-type ultra-wide grid-type bridge deck blocks, which not only effectively guarantees the manufacturing accuracy of such structures, but also ensures the matching accuracy between the various components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of a split type ultra-wide lattice bridge deck block structure according to a specific embodiment of the present invention; Figure 2 It is another structural schematic diagram of a split type ultra-wide lattice bridge deck block structure according to a specific embodiment of the present invention; Figure 3 for Figure 2 The structural diagram of the node bridge deck unit in FIG. Figure 4 for Figure 2 Structural diagram of the node longitudinal beam in FIG. Figure 5 for Figure 2 Schematic diagram of the structure of the internode longitudinal beam; Figure 6 for Figure 2 Structural diagram of the node beam in FIG. Figure 7 for Figure 2 Schematic diagram of the structure of the intersegmental transverse ribs; Figure 8 It is a structural schematic diagram of a tire frame in a method for manufacturing a split type ultra-wide lattice bridge deck block structure according to a specific embodiment of the present invention; Fig. 9 for Figure 8 Side view of Fig.10 It is a schematic diagram of assembling bridge deck units in a method for manufacturing a split type ultra-wide lattice bridge deck block structure according to a specific embodiment of the present invention; Fig.11 It is a schematic diagram of a manufacturing method of a split type ultra-wide grid-type bridge deck block structure according to a specific embodiment of the present invention; Fig.12 A schematic diagram of the size positioning of a method for manufacturing a split type ultra-wide lattice bridge deck block structure according to a specific embodiment of the present invention; The figures are as follows: 1-node bridge deck block; 2-inter-node bridge deck block; 101-node bridge deck unit; 102-node longitudinal beam; 103-node transverse beam; 104-node longitudinal beam web; 105-node longitudinal beam cover plate; 106-node longitudinal beam stiffening plate; 107-node transverse beam web; 108-node transverse beam cover plate; 109-longitudinal beam joint plate; 110-node transverse beam stiffening plate; 111-face plate; 112-U-shaped rib; 113-plate rib; 201-inter-section bridge deck unit; 202-inter-section longitudinal beam; 203-inter-section transverse rib; 204-inter-section longitudinal beam web; 205-inter-section longitudinal beam cover plate; 206-inter-section longitudinal beam stiffening plate; 207-transverse rib joint plate; 208-inter-section transverse beam web; 209-inter-section transverse beam cover plate; 210-inter-section transverse beam stiffening plate. DETAILED DESCRIPTION

[0024] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention. It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0025] In this application, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] Embodiment 1: like Figure 1-7 As shown, the present application discloses a split type ultra-wide grid-type bridge deck block structure, which can achieve high-precision matching between bridge deck blocks.

[0028] The bridge deck block includes at least one node bridge deck block and at least two inter-node bridge deck blocks, wherein the side of the node bridge deck block is connected to the side of multiple inter-node bridge deck blocks, and the sum of the widths of the inter-node bridge deck blocks is equal to the width of the node bridge deck.

[0029] Specifically, Figure 1 , 2 As shown, the node bridge deck block 1 includes: Node bridge deck unit 101; A plurality of node longitudinal beams 102 are installed on the node bridge deck unit 101, and the node longitudinal beams 202 are arranged at intervals to ensure the strength of the node bridge deck unit 101; A plurality of node cross beams 103 are installed on the node bridge deck unit 101 , and the node cross beams 103 are connected to the node longitudinal beams 102 . The node longitudinal beams 102 and the node cross beams 103 cooperate with each other to improve the strength of the node bridge deck unit 101 .

[0030] The inter-segment bridge deck block 2 comprises: Intersegmental bridge deck unit 201; A plurality of inter-segment longitudinal beams 202 are installed on the inter-segment bridge deck unit 201, and the inter-segment longitudinal beams are used to ensure the strength of the inter-segment bridge deck unit 201; A plurality of inter-segment transverse ribs 203 are installed on the inter-segment bridge deck unit, and the inter-segment transverse ribs are connected to the inter-segment longitudinal beams. The inter-segment transverse ribs 203 and the inter-segment longitudinal beams 202 cooperate with each other to form a stable inter-segment bridge deck block 2 structure.

[0031] Specifically, in order to further ensure the stability of the structure and facilitate processing, the node longitudinal beams 102, the node transverse beams 103, the inter-node longitudinal beams 202 and the inter-node transverse ribs 203 described in the present application are all T-shaped.

[0032] The structures of the node longitudinal beams, node transverse beams, internode longitudinal beams and internode transverse ribs in the embodiments of the present application are further described as follows: Figure 3-7 As shown, the node longitudinal beam 102 includes: A node longitudinal beam web 104, wherein the node longitudinal beam web 104 is used to install a subsequent node longitudinal beam cover plate to form a T-shaped structure; A node longitudinal beam cover plate 105 is installed on the top of the node longitudinal beam web plate 104, and the node longitudinal beam cover plate 105 is perpendicular to the node longitudinal beam web plate 104; A plurality of node longitudinal beam stiffening plates 106 are installed on the side of the node longitudinal beam web 104, and bolt holes are provided on the node longitudinal beam stiffening plates 106 to facilitate subsequent processing; the node longitudinal beam stiffening plates 106 are divided into vertical and longitudinal directions, that is, a vertical cross structure is formed to ensure the stability of the entire node longitudinal beam 102; The node beam 103 comprises: Node beam web 107; A node cross beam cover plate 108 is installed on the top of the node cross beam web plate 107, and the node cross beam cover plate 108 is perpendicular to the node cross beam web plate 107; A longitudinal beam joint plate 109 is installed on the node cross beam cover plate 108, and the longitudinal beam joint plate 109 is connected to the node longitudinal beam cover plate 105; A node beam stiffening plate 110 is installed on the side of the node beam web 107; The inter-section longitudinal beam 202 comprises: Internode longitudinal beam web 204; The inter-segment stringer cap plate 205 is installed on the top of the inter-segment stringer web plate 204, and the inter-segment stringer cap plate 205 is perpendicular to the inter-segment stringer web plate 204; A plurality of inter-segment longitudinal beam stiffening plates 206 are installed on the side of the inter-segment longitudinal beam web 204, and bolt holes are opened on the inter-segment longitudinal beam stiffening plates 206; A transverse rib joint plate 207 is installed on the side of the inter-section longitudinal beam web 204; The intersegmental transverse ribs 203 include: Internode cross beam web 208; The inter-section cross beam cover plate 209 is installed on the top of the inter-section cross beam web plate 208, and the inter-section cross beam cover plate 209 is perpendicular to the inter-section cross beam web plate 208, and the inter-section cross beam cover plate 209 is connected to the transverse rib joint plate 207; The inter-segment cross beam stiffening plate 210 is installed on the side of the inter-segment cross beam web 208 .

[0033] Specifically, in the present application, each component in the node longitudinal beam, node transverse beam, inter-node longitudinal beam and inter-node transverse rib is multiple, which can ensure the stability of the overall structure.

[0034] The node bridge deck unit 101 and the inter-section bridge deck unit 201 in the present application are further described. The two have the same structure but are different in size. The node bridge deck unit 101 includes: Panel 111; A plurality of U-shaped ribs 112 are installed on the panel 111 at intervals; A plurality of plate ribs 113 are installed at intervals on the panel 111, and the plate ribs 113 are parallel to the U-shaped ribs 112; the overall strength of the node bridge deck unit 101 and the inter-node bridge deck unit 201 can be ensured by the cooperation between the plate ribs 113 and the U-shaped ribs 112.

[0035] Further explanation is given for the embodiments of the present application: The embodiment of the present application discloses a split structure, which can ensure high-precision matching between multiple bridge deck blocks in each interval, between the bridge deck blocks and the outer chord rods, and between the bridge deck blocks in other intervals, compared with the existing integral structure. Specifically, each bridge deck block is divided into a node bridge deck block and multiple inter-interval bridge deck blocks, and the node bridge deck blocks and the inter-interval bridge deck blocks are spliced ​​to ensure high-precision matching of the whole.

[0036] Embodiment 2: like Figure 8-11 As shown, based on the structure disclosed in Example 1, this embodiment discloses a method for making the structure, comprising the following steps: S1: Cutting and parts processing: Cut and process the materials to form node longitudinal beam webs, node longitudinal beam caps, node longitudinal beam stiffening plates, node transverse beam webs, node transverse beam caps, longitudinal beam joint plates, node transverse beam stiffening plates, panels, U-shaped ribs, plate ribs, inter-section longitudinal beam webs, inter-section longitudinal beam caps, inter-section longitudinal beam stiffening plates, transverse rib joint plates, inter-section transverse beam webs, inter-section transverse beam caps and inter-section transverse beam stiffening plates; specifically, node longitudinal beam stiffening plates, node transverse beam stiffening plates, inter-section longitudinal beam stiffening plates and inter-section transverse beam stiffening plates are cut by plasma precision cutting machines; node longitudinal beam caps, plate ribs and U-shaped ribs are cut by gantry precision cutting machines; node transverse beam webs, inter-section transverse beam webs and transverse rib joints are cut by gantry precision cutting machines. Complex parts with irregular shapes such as plates are cut by CNC precision cutting machines. If the node bridge deck unit or the inter-section bridge deck unit is rolled to a fixed length, no cutting is required. If it is rolled to multiple lengths, a gantry precision cutting machine is used for cutting. After the U-shaped rib is cut, the two long side bevels are processed and pressed into a U-shaped rib by a bending machine. It is necessary to ensure that the long side bevel of the U-shaped rib faces the outside of the structure after bending. Bevel processing equipment is used to process the butt bevel of the parts, and a bevel milling machine is used to process the transition slope of the crossbeam web and the cover plate thick plate. The slope size of the transition slope must be ensured. The node crossbeam cover plate, inter-section crossbeam cover plate, node longitudinal beam cover plate and node longitudinal beam cover plate are bent by a bending machine to ensure that the bending radius, angle and distortion meet the accuracy requirements. S2: Production of node bridge deck units: On the assembly frame, multiple plate units (less than 4.0m in length) are produced as a whole according to the length of the multiple-size material and then divided. The specified length of the multiple-size material is used to draw a longitudinal baseline according to the "uniform division method" of the plate width margin, and a transverse baseline is drawn perpendicular to the longitudinal baseline. The longitudinal rib position line and the longitudinal rib end position line of each bridge deck unit are drawn based on the longitudinal and transverse baselines. The U-shaped ribs and plate ribs are assembled based on the longitudinal rib position line and the longitudinal rib end position line, and then welding and flame cutting are performed to obtain the node bridge deck unit; The specific contents of this step are as follows: install the panel onto the assembly frame, draw a longitudinal baseline according to the "uniform division method" of the panel width margin, draw a transverse baseline perpendicular to the longitudinal baseline, draw a longitudinal rib position line and a longitudinal rib end position line of each node bridge panel unit based on the longitudinal and transverse baselines, assemble U-shaped ribs and plate ribs based on the longitudinal rib position line and the longitudinal rib end position line, then weld the U-shaped ribs and plate rib welds symmetrically in the same direction, cut after assembly to make multiple node bridge panel units; that is, adopt an integral production and then segmentation process; wherein, in the control When making the spacing between plate ribs and U-shaped ribs, use the inspection sample for inspection; at the same time, when welding U-shaped ribs and plate ribs symmetrically in the same direction, use the portal multi-electrode automatic welding equipment, and use the plate unit automatic correction equipment to correct the plane of the plate unit to reduce the amount of flame correction; use the corrected longitudinal and transverse baselines as the basis to mark the crossbeam position, the flame tangent lines of the two long sides and the two short sides, and use the trolley to flame cut the grooves of the long sides and short sides. Note that the plate units on the outermost sides only have one long side and two short side grooves flame cut, and the plate units at other positions have two long sides and two short side grooves flame cut; S3: Fabrication of inter-segmental bridge deck unit: On the assembly frame, the specified double-sized materials are marked with a longitudinal baseline according to the "uniform division method" of the plate width margin, and a transverse baseline is marked perpendicular to the longitudinal baseline. The longitudinal rib position line and the longitudinal rib one end position line are marked based on the longitudinal and transverse baselines. The U-shaped ribs and plate ribs are assembled based on the longitudinal rib position line and the end position line, and then welding and flame cutting are performed to obtain the inter-segmental bridge deck unit; The specific contents of this step are as follows: install the panel onto the assembly frame, mark the longitudinal baseline with the specified double-sized material according to the "uniform division method" of the plate width margin, mark the transverse baseline perpendicular to the longitudinal baseline, mark the longitudinal rib position line and the longitudinal rib end position line based on the longitudinal and transverse baselines, assemble the U-shaped ribs and plate ribs based on the longitudinal rib position line and the end position line, then weld the U-shaped ribs and plate rib welds symmetrically in the same direction, cut them after assembly to make multiple inter-segment bridge panel units; specifically, it is necessary to focus on controlling the spacing of the longitudinal ribs at the transverse rib position, and Use a special inspection template for inspection; use a portal multi-electrode automatic welding device to weld U-shaped rib / plate rib welds symmetrically in the same direction on the anti-deformation tire frame at the ship position, and use a plate unit automatic correction device to perform plane correction on the plate sheet to reduce the amount of flame correction; use the corrected longitudinal and transverse baselines as the basis to mark the transverse rib position, long side and short side flame tangent lines, use a trolley to flame cut the long side and short side grooves, and note that the plate units on the outermost sides only have one long side and one short side groove flame cut, and the plate units at other positions have two long sides and one short side groove flame cut; S4: Production of node longitudinal beams, node transverse beams, internode longitudinal beams and internode transverse ribs: Based on various reference lines, complete the production of node longitudinal beams, node transverse beams, internode longitudinal beams and internode transverse ribs respectively; The specific contents of this step are as follows: When making the node longitudinal beam, draw the auxiliary longitudinal baseline with the bottom edge of the node longitudinal beam web as the reference, draw the transverse baseline perpendicular to the auxiliary longitudinal baseline, and assemble the node longitudinal beam cover plate by locating the width of the node longitudinal beam cover plate in the middle according to the transverse baseline. Specifically, focus on controlling the verticality of the web plate and the cover plate ≤1.0mm, and assemble the node longitudinal beam stiffening plate by locating the transverse baseline and the bottom edge of the node longitudinal beam web; When making the node beam, draw a longitudinal beam position line perpendicular to the center line of the node beam cover on the node beam cover, place the node beam web on the leveled tire frame, and align the longitudinal beam position line on the node beam web with the longitudinal beam position line on the cover to assemble into a T shape. Focus on controlling the verticality of the web and cover, requiring the end to be ≤1.0mm and the rest to be ≤1.5mm; When making the inter-segmental longitudinal beam, draw the auxiliary longitudinal baseline with the inter-segmental longitudinal beam web bottom plate as the reference, draw the transverse baseline perpendicular to the auxiliary longitudinal baseline, and assemble the inter-segmental longitudinal beam cover plate based on the width of the inter-segmental longitudinal beam cover plate, with the focus on controlling the verticality of the inter-segmental longitudinal beam web plate and the inter-segmental longitudinal beam cover plate ≤1.0mm, and assemble the transverse rib joint plate and the inter-segmental longitudinal beam stiffening plate based on the transverse baseline and the bottom edge of the web plate; When making inter-section transverse ribs, first draw a longitudinal beam position line perpendicular to the center line of the inter-section beam cover on the inter-section beam cover, place the inter-section beam web on the leveled tire frame, and align the longitudinal beam position line on the inter-section beam web with the longitudinal beam position line on the inter-section beam cover to form a T-shape. Focus on controlling the verticality of the inter-section beam web and the inter-section beam cover, requiring the end to be ≤2.0mm; S5: Matching and manufacturing of bridge deck blocks: The bridge deck blocks are matched and manufactured in the reverse position using the "long line method", that is, the bridge deck blocks of multiple consecutive sections are matched and manufactured at the same time, and the position of the bridge deck blocks during manufacturing is opposite to the position of the actual bridge; specifically, the following steps are included: S501: Measurement control network setting: Establish a measurement control network before the tire frame is made; The specific contents of this step are as follows: a measuring tower is set in the length direction of the tire frame for comprehensive inspection of the tire frame and the measuring control network in the later stage; in order to ensure the accuracy and applicability of the reference system in the matching and manufacturing process of the bridge deck blocks, a firm and accurate measuring control network is first established before the tire frame is manufactured; at the same time, when the measuring control network is set up, a measuring tower is set at each end of the tire frame, and a concrete measuring tower must be used to reduce the influence of light and temperature on it; S502: Tire frame design: Assemble the tire frame at an assembly site with sufficient foundation bearing capacity; The specific contents of this step are as follows: at an assembly site with sufficient foundation bearing capacity, the tire frame is arranged according to the tire frame construction drawings. The tire frame is fixed to the foundation with anchor bolts and is composed of columns, H-shaped longitudinal beams, H-shaped transverse beams and support plates. A detachable transverse beam is set in the middle of the width of the tire frame for the passage of the beam transport flat car; support plates are arranged on each transverse beam of the tire frame, and the transverse and longitudinal elevations of the support plates are arranged according to the transverse slope and longitudinal slope of the bridge deck, so as to control the transverse and longitudinal manufacturing line types of the bridge deck blocks and ensure that the bridge deck blocks are in a good stress state on the tire frame; S503: Bridge deck block production: first locate the reference plate unit, then locate other bridge deck units, adopt "ladder" progressive positioning and assembly to complete the assembly of the bridge deck unit, then locate the node cross beams and node longitudinal beams to complete the assembly of the node bridge deck blocks, and finally locate the inter-node longitudinal beams and inter-node cross ribs to complete the assembly of the inter-node bridge deck blocks; specifically, it can be based on Fig.12 Parameters are used for positioning and assembly. Fig.12 The parameter unit is mm.

[0037] The specific contents of this step are as follows: First, locate the reference plate unit at the intersection of the longitudinal baseline and the transverse baseline of the tire frame, and the reference plate unit can be a node bridge deck unit or an inter-segment bridge deck unit; after the reference plate unit is located, other bridge deck units in the same inter-segment are located transversely with the measuring tower as the reference, and longitudinally with the transverse baseline of the reference bridge deck unit as the reference, and adjacent inter-segment bridge deck units are located transversely with the measuring tower as the reference, and longitudinally with the transverse baseline of the reference bridge deck unit as the reference, and all plate units are positioned and assembled in a "step-by-step" progressive manner, wherein the plate unit and the tire frame are positioned while being fixed in small amounts, and after all the plate units are positioned, they are completely fixed to the tire frame, and the longitudinal seams between the plate units are positioned while being fixed, and the bridge deck units include node bridge deck units and inter-segment bridge deck units; When assembling the longitudinal beams and transverse beams of the node bridge deck block, the longitudinal beams are first assembled and then the transverse beams, and the middle is assembled and then the two ends are assembled. When assembling the longitudinal beams, the initial positioning is performed first, and the longitudinal beams are fine-tuned after the transverse beams are assembled in place, so as to ensure that the transverse beams can be smoothly inserted and the assembly accuracy of the longitudinal beams is ensured; When positioning and assembling the longitudinal beams and transverse ribs of the inter-segment bridge deck block, the assembly sequence is first the transverse ribs and then the longitudinal beams, and first the middle and then the two ends. The transverse ribs on both sides of each longitudinal beam are initially positioned first. When positioning, the distance between the two transverse ribs needs to be controlled to be maximum so as to insert the longitudinal beam. After the longitudinal beam is adjusted in place, the transverse ribs are precisely positioned to ensure that the transverse rib notches can better match the plate unit, and at the same time, the longitudinal beam can be smoothly inserted into multiple transverse ribs, so as to realize the assembly of the longitudinal beams and transverse ribs. S6: Bridge deck block welding: All welds are welded symmetrically using CO2 gas shielded welding; first, the longitudinal butt welds between the bridge deck units are welded symmetrically from the middle to both sides, among which the longitudinal butt welds between the node bridge deck units are all welded, and only the longitudinal butt welds within the plate are welded between the inter-section bridge deck units, and the longitudinal butt welds between the plates are not welded; then weld the welds between the longitudinal beams and the cross beams and the cross ribs, and symmetrically weld the cross beam web vertical butt welds, the longitudinal beam web and the cross beam web vertical penetration fillet welds, and the cross rib and the longitudinal beam vertical fillet welds from the middle to both sides; finally, weld the longitudinal beams, cross beams, cross ribs and panels, U-shaped ribs, cross beam cover plate butt welds, and cross rib cover plate and longitudinal beam joint plate butt welds from the middle to both sides; S7: Decoding and marking: After the bridge deck block is welded, decoding and marking operations are performed; The specific contents of this step are as follows: after the bridge deck block is welded, before marking, except for the outermost plates in the width direction and the support plates and tire frames on both sides of the longitudinal seam on the construction site, all other positions are released to decode and release the welding shrinkage stress in the bridge deck block, and then readjust it to the original position and mark the position lines of the outermost hole groups of the beams and transverse ribs and the trimming lines of the bridge deck, beams and transverse ribs; at the same time, the ring-shaped plates of the adjacent inter-node bridge deck blocks are released, so that the bridge deck blocks can shrink freely in the longitudinal direction, and then the trimming lines of the bridge deck and longitudinal beams at the non-reference ends of the inter-node bridge deck blocks are marked; S8: Drilling and secondary flame cutting: Drilling and secondary flame cutting: After the marking is completed, drilling and flame cutting are performed; The specific contents of this step are as follows: after the marking is completed, the holes of the web of the outermost beam and the web of the transverse rib are drilled according to the line card template; the holes on the longitudinal beam at the transverse joint of the construction site and the holes on the transverse rib at the longitudinal joint of the construction site are drilled with the existing holes of the adjacent bridge deck blocks using the template; the residual and groove of the longitudinal beam, transverse beam and transverse rib cover are cut by flame using a portable semi-automatic cutting machine; S9: Tire unloading and turning over: Use a flat car to unload the tire, and use a sling to turn over to complete the processing; The specific contents of this step are as follows: Use a beam transport flat car to remove the beams. Temporary longitudinal connection is required before the inter-segment bridge deck blocks are removed. Use the bolt holes on the horizontal stiffeners at both ends of the longitudinal beam to bolt the lifting ears. Use a gantry crane equipped with a lifting device to turn over and complete the processing.

[0038] Furthermore, the steps of this application also include the following: Step S0: Bridge deck block division: that is, divide the bridge deck block of each interval into a node bridge deck block and no less than two inter-interval bridge deck blocks according to the drawings; the node bridge deck block is composed of a node bridge deck unit, a node T-shaped longitudinal beam and a node T-shaped transverse beam, the node bridge deck block length is L1 (usually 3.0m~4.0m), and the width is the full width of the bridge deck block B; the inter-interval bridge deck block is composed of an inter-interval bridge deck unit, an inter-interval T-shaped longitudinal beam and an inter-interval T-shaped transverse rib, the inter-interval bridge deck block length is L2 (total inter-interval length L-node bridge deck block length L1), and the width is B1, B2, B3..., wherein the sum of the widths of all inter-interval bridge deck blocks is B; considering the rolling capacity of the steel plant and the processing capacity of the equipment, the bridge deck is manufactured in the transverse direction of the bridge, generally divided into 3.5m~3.7m, so as to facilitate subsequent processing.

[0039] Wherein, step S2 also includes the following contents: when marking the node bridge panel unit, any end of the steel plate is selected as the reference end of the panel unit (unified for the whole bridge), and the first horizontal baseline is marked in the length direction according to "theoretical length + 10mm" and perpendicular to the longitudinal baseline based on the end, and then other horizontal baselines are marked according to the first horizontal baseline at a spacing of "theoretical length + 10mm"; when the panel unit is assembled, the gap between the key U-shaped rib and the plate rib and the panel is ≤0.5mm, the maximum allowable local gap is 1.0mm, and the alignment deviation is ≤0.5mm; after the panel unit is welded, it is corrected, and the flatness after correction is required to be ≤1.5mm in the horizontal direction and ≤3.0mm in the vertical direction.

[0040] Wherein, step S3 also includes the following contents: when marking the inter-segment bridge deck unit, any end of the steel plate is selected as the trimming edge of the deck unit (unified for the whole bridge), and the horizontal baseline is marked in the length direction according to "theoretical length + 15mm" and perpendicular to the longitudinal baseline with the end as the reference, and the part number and trimming edge mark are made with a paint pen at the specified position; when assembling the deck unit, the gap between the key U-shaped rib and the plate rib and the deck is ≤0.5mm, the maximum allowable local gap is 1.0mm, and the alignment deviation is ≤0.5mm; after the deck unit is welded, it is corrected, and the flatness after correction is required to be ≤1.5mm in the horizontal direction and ≤3.0mm in the vertical direction.

[0041] Among them, step S502 also includes the following contents: when designing the assembled tire frame, the width direction of the tire frame must meet the width of the node bridge deck block while reserving a 1.5m safety passage, and the length direction must meet the total length of the bridge deck block during matching. The spacing between the longitudinal beams of the tire frame is generally arranged at 4.0m to 5.0m, and the spacing between the cross beams is generally arranged according to the spacing between the cross beams and cross ribs of the bridge deck block (generally 2.0m to 3.0m). The support plates on the tire frame are generally arranged at a spacing of 1.5m to 2.0m to ensure that the stiffness of the tire frame meets the requirements when under pressure; after the tire frame is arranged, use a level to detect the tire frame to ensure that the height deviation of the tire frame support plate is controlled within ±1.0mm, and finally use a theodolite to lay out the vertical and horizontal baselines (ground sample lines) on the tire frame.

[0042] Among them, step S503 also includes the following contents: when the bridge deck unit is positioned and assembled, the longitudinal baseline of the bridge deck unit is in relationship with the measuring tower, and is uniformly controlled according to "theoretical value + 2.0mm", the horizontal baseline spacing between the plate units in the same interval is controlled according to the theoretical value, with a deviation of ≤1.0mm, and the horizontal baseline spacing between the bridge deck units in adjacent intervals is controlled according to "theoretical value + 40.0mm", with a deviation of ≤1.0mm. If the deviation exceeds the limit, the cause must be found out before the next operation can be performed; when the plate unit is positioned, the misalignment of the butt joint must be controlled to be ≤0.5mm, and the longitudinal butt joint is positioned with a horse plate after the requirement is met; When the bridge deck unit is positioned and assembled, after all the bridge decks are welded, the longitudinal and transverse baselines of the deck unit are trimmed with a measuring tower. After passing the test, auxiliary weights and tire frames are used to compact and fix the deck, ensuring that the gap between the bridge deck and the support plate is ≤1.0mm, and the bridge deck and the tire frame are fixed with normal horse plates (200mmx400mm). The 2 to 3 rows of horse plates on the outermost sides of the transverse bridge must be fixed with large horse plates (200mmx1000mm).

[0043] Among them, step S503 also includes the following contents: when positioning the cross beam and cross rib, strictly control the verticality and the gap between the notch and the U-shaped rib, use an angle template to detect the verticality, and use non-destructive support on both sides ≤2.0m for support to ensure safety during construction; when positioning the longitudinal beam, strictly control the verticality of the longitudinal beam, tighten the longitudinal beam web to the cross beam web and the cross rib web, and control the misalignment of the longitudinal beam web and the long side of the bridge deck to ≤5.0mm.

[0044] Among them, step S7 also includes the following contents: when the decoding and marking are performed, the marking must be measured under no sunlight conditions (if it is in summer, it is best to do it before 7:00 in the morning); each round of matching is long and the distance is far, which affects the measurement accuracy. It is required to place a mirror in the middle and use the two ends as aiming points; when marking the reference ground sample line of the outermost beam and cross rib hole group, pay attention to the ground sample line exceeding the outermost beam web and cross rib web hole by 100mm.

[0045] Among them, step S9 also includes the following contents: during the unloading and turning over, the lifting lugs are bolted to the horizontal stiffeners, using at least two punch nails and two high-strength bolts. During the turning over, follow the unified command of the lifting commander, conduct a trial lifting first, and then turn over slowly and steadily to ensure safety during the turning over process.

[0046] In the specification of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A split type ultra-wide lattice bridge deck block structure, characterized in that: It comprises a plurality of node bridge deck blocks and a plurality of inter-section bridge deck blocks, and the side surfaces of the node bridge deck blocks match the side surfaces of the inter-section bridge deck blocks; The node bridge deck block comprises: Node bridge deck unit; A plurality of node longitudinal beams installed on the node bridge deck unit; A plurality of node cross beams are installed on the node bridge deck unit, and the node cross beams are connected to the node longitudinal beams; The inter-segment bridge deck block comprises: Intersegmental bridge deck units; A plurality of inter-segment longitudinal beams are installed on the inter-segment bridge deck units; Intersegmental transverse ribs are installed on the intersegmental bridge deck units, and the intersegmental transverse ribs are connected to the intersegmental longitudinal beams.

2. The split type ultra-wide lattice bridge deck block structure according to claim 1 is characterized in that: The node longitudinal beams, node transverse beams, internode longitudinal beams and internode transverse ribs are all T-shaped.

3. A method for manufacturing a split type ultra-wide lattice bridge deck block structure, characterized in that: include: S1: Cutting and parts processing: cutting and processing materials to form various parts; S2: Production of node bridge deck units: On the assembly frame, multiple plate units are produced as a whole according to the length of multiple-sized materials and then divided. The specified length of multiple-sized materials is used to draw a longitudinal baseline according to the "uniform division method" of the plate width margin, and a transverse baseline is drawn perpendicular to the longitudinal baseline. The longitudinal rib position line and the position line of one end of the longitudinal rib of each bridge deck unit are drawn based on the longitudinal and transverse baselines. The U-shaped ribs and plate ribs are assembled based on the longitudinal rib position line and the longitudinal rib end position line, and then welding and flame cutting are performed to obtain the node bridge deck unit; S3: Fabrication of inter-segmental bridge deck unit: On the assembly frame, the specified double-sized materials are marked with a longitudinal baseline according to the "uniform division method" of the plate width margin, and a transverse baseline is marked perpendicular to the longitudinal baseline. The longitudinal rib position line and the longitudinal rib end position line are marked based on the longitudinal and transverse baselines. The U-shaped ribs and plate ribs are assembled based on the longitudinal rib position line and the end position line, and then welding and flame cutting are performed to obtain the inter-segmental bridge deck unit; S4: Production of node longitudinal beams, node transverse beams, internode longitudinal beams and internode transverse ribs: Based on various reference lines, complete the production of node longitudinal beams, node transverse beams, internode longitudinal beams and internode transverse ribs respectively; S5: Bridge deck block matching and production: The "long line method" is used to match and produce the bridge deck blocks in the reverse position, that is, the bridge deck blocks of multiple consecutive sections are matched and produced at the same time. During the production, the position of the bridge deck blocks is opposite to that of the actual bridge; S6: Bridge deck welding: symmetrically weld all welds; S7: Decoding and marking: After the bridge deck block is welded, decoding and marking operations are performed; S8: Drilling and secondary flame cutting: After the marking is completed, drilling and flame cutting are performed; S9: Tire unloading and turning over: Use a flat car to unload the tire, and use a sling to turn over to complete the processing.

4. The manufacturing method according to claim 3, characterized in that: The specific steps of step S5 are as follows: S501: Measurement control network setting: Establish the measurement control network before the tire frame is made; S502: Tire frame design: Assemble the tire frame at an assembly site with sufficient foundation bearing capacity; S503: First locate the reference plate unit, then locate other bridge deck units, adopt "step-by-step" progressive positioning and assembly to complete the assembly of the bridge deck unit, then locate the node cross beams and node longitudinal beams to complete the assembly of the node bridge deck blocks, and finally locate the inter-node longitudinal beams and inter-node cross ribs to complete the assembly of the inter-node bridge deck blocks.

5. The manufacturing method according to claim 4, characterized in that: The step S502 also includes the following contents: When designing the assembled tire frame, the width direction of the tire frame must meet the width of the node bridge deck block while reserving a 1.5m safety passage, the length direction must meet the total length of the bridge deck block during matching production, the tire frame longitudinal beam spacing is arranged according to 4.0m to 5.0m, the cross beam spacing is arranged according to the cross beam and cross rib spacing of the bridge deck block, and the support plates on the tire frame are arranged at a spacing of 1.5m to 2.0m to ensure that the rigidity of the tire frame meets the requirements when under pressure; after the tire frame is arranged, use a level to check the tire frame to ensure that the height deviation of the tire frame support plate is controlled within ±1.0mm, and finally use a theodolite to lay out the longitudinal and transverse baselines on the tire frame.

6. The manufacturing method according to claim 5, characterized in that: The step S503 also includes the following contents: When the bridge deck unit is positioned and assembled, the longitudinal baseline of the bridge deck unit is related to the measuring tower and is uniformly controlled according to "theoretical value + 2.0mm". The transverse baseline spacing between the internal plate units of the same interval is controlled according to the theoretical value, with a deviation of ≤1.0mm. The transverse baseline spacing between the bridge deck units of adjacent intervals is controlled according to "theoretical value + 40.0mm", with a deviation of ≤1.0mm. If the deviation exceeds the limit, the cause must be found out before the next operation can be carried out. When positioning the plate unit, the misalignment of the butt joint must be controlled to be ≤0.5mm. After meeting the requirements, the longitudinal butt joint is positioned with a horse plate.

7. The manufacturing method according to claim 6, characterized in that: The step S503 also includes the following contents: When positioning the node beams and inter-node cross ribs, use angle templates to check verticality, and use non-destructive support to support them at a distance of ≤2.0m on both sides to ensure safety during construction; When positioning the node longitudinal beams and inter-section longitudinal beams, the verticality of the longitudinal beams is strictly controlled, the webs of the longitudinal beams are pressed tightly against the webs of the cross beams and the webs of the cross ribs, and the misalignment between the webs of the longitudinal beams and the long sides of the bridge deck is controlled to be ≤5.0mm.

8. The manufacturing method according to claim 3, characterized in that: The step S2 also includes the following contents: When marking the node bridge deck unit, any end of the steel plate is selected as the reference end of the deck unit, and the first horizontal baseline is marked in the length direction according to "theoretical length + 10mm" and perpendicular to the longitudinal baseline based on the end, and then other horizontal baselines are marked according to the first horizontal baseline at a spacing of "theoretical length + 10mm"; when the deck unit is assembled, the gap between the key U-shaped rib and the plate rib and the deck is ≤0.5mm, the maximum allowable local gap is 1.0mm, and the alignment deviation is ≤0.5mm; after the deck unit is welded, it is corrected, and the flatness after correction is required to be ≤1.5mm in the horizontal direction and ≤3.0mm in the vertical direction.

9. The manufacturing method according to claim 7, characterized in that: The step S3 also includes the following contents: When marking the inter-segment bridge deck unit, any end of the steel plate is selected as the trimming edge of the deck unit, and a horizontal baseline is drawn with the end as the standard length direction according to "theoretical length + 15mm" and perpendicular to the longitudinal baseline, and the part number and trimming edge mark are made with a paint pen at the specified position; when the deck unit is assembled, the gap between the key U-shaped ribs and the plate ribs and the deck is ≤0.5mm, the maximum allowable local gap is 1.0mm, and the alignment deviation is ≤0.5mm; the deck unit is corrected after welding, and the flatness after correction is required to be ≤1.5mm horizontally and ≤3.0mm vertically.

10. The manufacturing method according to claim 3, characterized in that: The step S9 also includes the following contents: during the tire removal and turning over, the lifting lugs are bolted to the horizontal stiffeners, using at least two punch nails and two high-strength bolts. During the turning over process, a trial lifting is performed first, and then the turning over is performed slowly and steadily to ensure safety during the turning over process.

Images