Method for manufacturing steel bridge of bicycle expressway across trunk line

Abstract

The invention provides a manufacturing method of a main-trunk-line-crossing bicycle expressway steel bridge, relates to the technical field of steel bridge manufacturing, and solves the technical problems that high-precision manufacturing of a main-trunk-line-crossing bicycle expressway steel bridge, accurate installation of anchor pipes and guide pipes and high-precision connection of beam sections cannot be achieved through a steel bridge manufacturing method in the prior art. According to the technical scheme, a steel bridge part is subjected to segmentation treatment, accurate lofting and installation of a measurement guide pipe, and installation of a base plate at the bottom of an anchor pipe comprises the steps of measurement, secondary positioning installation and allowance trimming and cutting; according to the method, the forming size of the beam section can be effectively guaranteed, the positioning and mounting precision of the circular pipe with the space angle is improved, and the mounting precision of the space base plate is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel bridge manufacturing, in particular to a method for manufacturing a steel bridge across a trunk line bicycle highway. Background Art

[0002] Bicycle highways refer to inter-city traffic routes with flat and wide roads, which are specially designed for cycling. Although the two sides of the route are not completely closed, there are no intersections along the entire route, which facilitates cyclists to travel between two cities at a very fast speed. The manufacturing of steel bridges for bicycle highways has just started, and the load is mainly carried by the zippers on both sides through anchor pipes and guide pipes, so the installation accuracy of guide pipes and anchor pipes is particularly critical.

[0003] The installation of anchor pipes and guide pipes on the bicycle highway steel bridge is in the form of round pipes and round pipes hinged together with a spatial angle, which is not suitable for the positioning and installation of anchor boxes and anchor pipes on both sides of the traditional cable-stayed bridge; at the same time, this bicycle highway steel bridge across the main line has a low load-bearing capacity and needs to cross the traffic trunk line to connect the urban traffic route, so its shape is more complex, and the connection method between sections is more complex than that of traditional steel bridges. How to achieve high-precision manufacturing, precise installation of anchor pipes and guide pipes, and high-precision connection of beam sections for this bicycle highway steel bridge across the main line is a problem that the present invention needs to solve. Summary of the invention

[0004] Therefore, the present invention solves the technical problem that the steel bridge manufacturing method in the prior art cannot realize high-precision manufacturing of bicycle highway steel bridges across the main line, accurate installation of anchor pipes and guide pipes, and high-precision connection of beam sections; the present invention provides a method for manufacturing a bicycle highway steel bridge across the main line, which uses the side of the structure with more parts as the tire bottom plate for reverse assembly and manufacturing, effectively ensuring the size of the beam section; the installation of the guide pipe improves the positioning and installation accuracy of the round pipe with a spatial angle through precise layout and measurement; the installation of the bottom pad of the anchor pipe effectively improves the installation accuracy of the spatial pad through measurement, secondary positioning installation, and excess trimming; because the cantilever of the beam section cannot withstand a large external force, by adding turning ears on both sides of the web, disconnecting the cantilever at the position of the turning ears, and restoring the notched patching section of the cantilever arm to its original position after turning, the method avoids the need to make large-scale turning tooling for turning or strengthen the cantilever arm structure, improves the turning efficiency of the beam section, reduces the use of turning materials, and improves the safety of the turning operation.

[0005] The present invention provides a method for manufacturing a steel bridge across a trunk line bicycle highway, comprising the following steps:

[0006] S1: Divide the steel bridge into multiple beam segments;

[0007] S2: Divide a single beam segment into a box beam structure, a cantilever structure, an upper support and a lower support;

[0008] S3: Processing and manufacturing various structures of the beam segment, and assembling them to form the beam segment;

[0009] S4: Assembling the beam segments formed in step S3 to form a steel bridge.

[0010] Furthermore, the specific steps of the process of manufacturing the box beam structure in step S3 are as follows:

[0011] S31: Divide the exterior of the box girder structure into top plate units, bottom plate units, inner web units, and outer web units; divide the interior of the box girder structure into port matching diaphragms, anchor diaphragms, and solid web diaphragms, which are transversely arranged inside the box girder;

[0012] S32: Top plate unit is manufactured. Due to the size limitation of steel plate, top plate unit is composed of multiple plate units. When cutting parts, a welding shrinkage allowance of 0.5‰ (0.5%) is placed on a single plate unit, and a 50mm allowance is placed on both ends. The longitudinal and transverse reference lines of the plate unit of the top plate are checked, and the top plate unit is placed on the forming frame to be assembled into a whole and reinforced ribs are installed.

[0013] S33: Anchoring bulkhead unit production. The anchoring bulkhead unit consists of transverse bulkhead, longitudinal bulkhead, anchor pipe, guide pipe, pad, reinforcing pipe, internal rib plate and external rib plate. The transverse bulkhead is used as the reference for production. On the plate unit frame, the longitudinal and transverse reference lines of the bulkhead and the rib plate installation lines are marked in sequence according to the drawings. After checking the markings, the reinforcing pipe and reinforcing connecting plate are assembled in sequence. Due to the narrow space problem, the welding of the reinforcing connecting plate is completed before the installation of the anchor pipe to achieve the welding of all welds. The reinforcing pipe is divided into two semicircular pipes before installation. , symmetrically arranged on both sides of the transverse diaphragm, the internal rib plate is vertically arranged on the outside of the reinforced tube, the reinforced connecting plate is arranged vertically on the transverse diaphragm inside the reinforced tube and aligned with the longitudinal diaphragm, the anchor tube is butted against the mouth of the reinforced tube, and a notch is opened before installation to connect with the transverse diaphragm with a socket connection, the external rib plate is vertically arranged on the outside of the reinforced tube and the anchor tube, and is not installed temporarily, and will be installed after the installation of the diaphragm is completed, the guide tube is obliquely arranged at the end of the anchor tube through the through hole, the pad is passed through the cable tube and is in close contact with the anchor tube, the through hole is not opened temporarily, and will be opened using a threading tool after the beam section is assembled and turned over;

[0014] S34: Draw the position line on the top plate unit, install the middle inner web unit, and then assemble the port matching partition, anchor partition, and solid web partition, and install them from the middle to both sides; after the beam section is formed, the height and width of the beam section are curved. Since the top plate unit is more complex than the bottom plate unit, the influence on the forming is greater, and the top plate unit is the key point of the direct contact surface under force, the control of the bridge deck is more important. Therefore, the overall assembly is carried out by the reverse manufacturing method, that is, the top plate unit is used as the assembly reference for production; the middle inner web unit is installed, and then the components on both sides of the middle inner web unit are assembled. This can avoid the gap in the middle being too small or too large when the components on both sides are installed first, which is convenient for installation; the partition and the inner web unit are only positioned and welded in the initial stage. The length of the positioning weld is 60mm, the interval is 400mm, and the size of the positioning weld leg is 5mm. The final welding needs to be carried out after the webs on both sides are installed. The installation position and angle of the anchor pipe are very important. The anchor diaphragm is positioned and installed according to the top plate unit marking line. The angle of the anchor diaphragm is determined according to the angle template of the web end. The vertical line of the anchor pipe is hung, and the anchor diaphragm is fine-tuned to ensure that the vertical line of the anchor pipe coincides with the ground sample line, and the total station is used to measure the space size.

[0015] S35: Install the remaining outer web units and bottom plate units.

[0016] Furthermore, the specific steps of making the cantilever structure in step S3 are as follows:

[0017] S36: The cantilever arm structure is prefabricated into components, with lateral bending deviation ≤5mm, camber deviation ≤8mm, twisting deviation ≤6mm, length deviation ≤4mm, diagonal deviation ≤4mm, height deviation ≤2mm, and overall width ≤2mm; when the cantilever arm component is manufactured, the lower bracket connecting plate is installed after the positioning of the lower bracket is completed;

[0018] S37: Install the cantilever structure on both sides of the box beam structure.

[0019] Furthermore, after the cantilever arm structure is installed in the above step S37, the lower bracket is installed for trial, and the lower brackets are removed in sequence after the trial installation is completed. The aluminum-plastic mounting holes at the lower edge of the outer web of the cantilever arm are used as a reference, and the aluminum-plastic mounting holes at the upper edge are processed to achieve the unification of the upper and lower references, and the beam section is turned 180 degrees.

[0020] Furthermore, the specific assembly steps of the beam segments in step S4 are as follows:

[0021] S41: Assemble the beam segments after turning over 180 degrees to simulate the bridge position line;

[0022] S42: Install anchor pipe pads on the anchor pipes; according to the parts drawing, machine the curved surface where the pads and anchor pipes meet to ensure the fit with the anchor pipes, and at the same time increase the thickness margin by about 5mm; the anchor pipe pads are preliminarily installed on the pre-assembly line, and the pads are measured by the total station to make fine adjustments to the position. After the measurement is qualified, the positioning installation line and the margin cutting line are drawn, the support pads are removed and the thickness margin is removed by a milling machine according to the margin line, and then the support pads are reset, installed and welded according to the installation line on the anchor pipe; this can ensure the verticality requirements of the support pads and the guide pipes;

[0023] S43: Make the guide tube assembly; the guide tube assembly is welded into an assembly by the guide tube, the stop ring and the cable flange. It is necessary to ensure that the cable flange surface is parallel to the center line of the guide tube, and the size requirement is ±1mm, that is, a 5mm margin is reserved for the flange. After the overall welding of the assembly is completed, the surface is machined to ensure the size and flatness requirements; after the guide tube assembly is installed, a water hole is opened on the guide tube; the water pipe and the anchor pipe are welded, and the water pipe is inserted into the water hole of the guide tube and the wire pipe. Due to limited space, no welding is performed, and after painting, it is glued to ensure sealing.

[0024] S44: Install the guide tube assembly on the anchor tube. The guide tube hole on the anchor tube is not opened first. The preliminary position is measured on the pre-assembly line. According to the measured position, a preliminary hole of 50mm is opened. The threading tool is set up to thread and fix the two ends of the thread. Through measurement, it is ensured that the direction of the line is the direction of the guide tube. Then, according to the theoretical development of the intersection line between the guide tube and the anchor tube, Figure 1 :1 Make a template, take the intersection of the wire and the anchor pipe as the center of the circle, use the expansion diagram to draw lines on the upper and lower parts of the anchor pipe, cut holes according to the lines, and then install and weld the guide pipe assembly;

[0025] S45: Install the upper bracket, using the aluminum-plastic plate installation holes on the upper edge of the outer web of the cantilever as a reference, position and install the upper bracket in sequence, and drill the hole group with the upper panel of the cantilever. This is to prevent the connection hole group between the upper bracket and the cantilever structure from being difficult to accurately and directly measure and drill because the beam section is a spatial curve. Aluminum-plastic plate installation holes are also required on the upper bracket and the lower bracket to work in conjunction with the aluminum-plastic plate installation holes on the outer web of the cantilever to achieve the installation of the upper and lower aluminum-plastic decorative panels; the aluminum-plastic plate installation holes between adjacent brackets are equally divided according to the deviation of the beam section to achieve interference-free installation of the aluminum-plastic decorative panels.

[0026] Furthermore, in step S32, the top plate unit is made to be positioned with blocks to prevent displacement, and the tire frame height on both sides in the width direction is 0-8mm lower than the theoretical height to offset the warping on both sides when the rib plate is installed.

[0027] Furthermore, the threading tool in step S44 includes two vertically arranged first screw rods, two second screw rods parallel to each other are horizontally arranged between the first screw rods, first sleeves are connected to both ends of the second screw rod, a first nut is arranged at the bottom of the first sleeve, and the first sleeve and the first nut are sleeved on the corresponding outer surface of the first screw rod; the surface of the second screw rod is sleeved with a second sleeve, and a second nut sleeved on the surface of the second screw rod is arranged at the end of the second sleeve, and a hanger is arranged on the second sleeve, and a wire hanging groove is opened on the hanger.

[0028] Furthermore, in step S41, the beam sections are spliced ​​with screws, and a connecting plate is provided at the closing opening of the beam sections, and the screws pass through the ports on the two closed beam sections to match the partition plate and the connecting plate. Figure 4 As shown, the middle area of ​​the end of the beam segment is concave. After the two beam segments are spliced, a ring is formed at the splicing point, and concrete is poured into the ring to strengthen the connection between the beam segments.

[0029] Furthermore, since the cantilever arm structure is relatively weak and cannot withstand the force of the flipped beam section, flipping ears are designed on the outer web unit and the top plate unit sides respectively. When designing the cantilever arm structure, in order to avoid interference between the wire ropes during flipping, the cantilever arm structure and the top plate unit at the interference point need to be set as an embedded section, which will be installed after the flipping is completed; the lifting ears are multifunctional lifting ears and can be used for flipping, lifting and shifting of beam sections.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] 1. The manufacturing method of the steel bridge for bicycle highway across the main line provided by the present invention effectively ensures the size of the beam section; the installation of the guide tube improves the positioning and installation accuracy of the round tube with a spatial angle through precise layout and measurement; the installation of the bottom pad of the anchor pipe effectively improves the installation accuracy of the spatial pad through measurement, secondary positioning installation, and excess cutting.

[0032] 2. The manufacturing method of the steel bridge for a bicycle highway across the main line provided by the present invention, since the cantilever of the beam section cannot withstand a large external force, by adding turning ears on both sides of the web, and disconnecting the cantilever at the position of the turning ears, and restoring the notched patching section of the cantilever arm to its original position after turning, the method avoids the need to make large-scale turning tooling for turning or strengthen the cantilever arm structure, thereby improving the turning efficiency of the beam section, reducing the use of turning materials, and improving the safety of the turning operation.

[0033] 3. The manufacturing method of the steel bridge across the main line bicycle highway provided by the present invention can facilitate the opening of guide tube through holes of different heights, lengths and angles by adopting threading tooling, thereby improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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.

[0035] Figure 1 This is a schematic diagram of the overall structure of the steel bridge of the present invention;

[0036] Figure 2 It is a diagram of the external structure of the box girder of the present invention;

[0037] Figure 3 It is a diagram of the internal structure of the box girder of the present invention;

[0038] Figure 4 It is the beam segment connection diagram of the present invention;

[0039] Figure 5 A top view of the top plate unit of the present invention;

[0040] Figure 6 This is a reinforcement arrangement diagram of the top plate unit of the present invention;

[0041] Figure 7 It is a schematic diagram of the placement of the top plate unit surplus of the present invention;

[0042] Figure 8 This is an assembly diagram of the top plate unit of the present invention;

[0043] Fig. 9 It is a schematic diagram of assembling the inner web unit and the outer web unit of the present invention;

[0044] Fig.10 This is a schematic diagram of assembling the bottom plate unit of the present invention;

[0045] Fig.11 This is a schematic diagram of the boom structure of the present invention;

[0046] Fig.12 This is a schematic diagram of the installation of the cantilever arm structure of the present invention;

[0047] Fig.13 This is a schematic diagram of the installation of the lower bracket of the present invention;

[0048] Fig.14 This is a schematic diagram of the installation of the upper bracket of the present invention;

[0049] Fig.15 This is a schematic diagram of the beam section flipping of the present invention;

[0050] Fig.16 It is a schematic diagram of the patching arrangement of the present invention;

[0051] Fig.17 This is a schematic diagram of the structure of the anchor diaphragm of the present invention;

[0052] Fig.18 This is a schematic diagram of the guide tube structure of the present invention;

[0053] Fig.19 This is a schematic diagram of the installation of the guide tube of the present invention;

[0054] Fig. 20 This is a working schematic diagram of the threading tool of the present invention;

[0055] Fig.21 It is a schematic diagram of the overall structure of the threading tool of the present invention.

[0056] Description of reference numerals:

[0057] 1. Box girder structure; 11. Top plate unit; 12. Bottom plate unit; 13. Inner web unit; 14. Outer web unit; 15. Port matching bulkhead; 16. Anchor bulkhead; 161. Transverse bulkhead; 162. Longitudinal bulkhead; 163. Anchor pipe; 164. Guide pipe; 165. Pad; 166. Strengthening pipe; 167. Internal rib plate; 168. External rib plate; 169. Strengthening connecting plate; 17. Solid web bulkhead; 2. Arm structure; 3. Upper bracket; 4. Lower bracket; 5. Cantilever arm structure; 51. Cantilever arm outer web; 52. Cantilever arm upper panel; 53. Upper edge aluminum-plastic mounting hole; 54. Lower edge aluminum-plastic mounting hole; 6. Aluminum-plastic decorative panel; 7. Stop ring; 8. Cable flange; 9. Threading tool; 91. First screw rod; 92. Second screw rod; 93. First sleeve; 94. First nut; 95. Hanging piece; 96. Second sleeve; 10. Screw rod. DETAILED DESCRIPTION

[0058] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] Embodiment 1:

[0060] The manufacturing method of the steel bridge across the trunk line bicycle highway in this embodiment includes the following steps:

[0061] S1: Divide the steel bridge into multiple beam segments;

[0062] S2: Divide a single beam segment into a box beam structure 1, a cantilever structure 5, an upper support 3 and a lower support 4; Figure 1 As shown;

[0063] S3: Processing and manufacturing various structures of the beam segment, and assembling them to form the beam segment;

[0064] S31: Figure 2 As shown, the outside of the box beam structure 1 is divided into a top plate unit 11, a bottom plate unit 12, an inner web unit 13, and an outer web unit 14. Figure 3 As shown, the interior of the box beam structure 1 is divided into a port matching partition 15, an anchoring partition 16, and a solid web partition 17;

[0065] S32: Figures 5 to 7 As shown, the top plate unit 11 is manufactured. Due to the size limitation of the steel plate, the top plate unit 11 is composed of multiple plate units. When the parts are cut, a welding shrinkage allowance of 0.5‰ is placed on the single plate unit, and a 50mm allowance is placed on the two ends. The longitudinal and transverse reference lines of the plate unit of the top plate are checked, and the top plate unit 11 is placed on the forming frame to be assembled into a whole and the reinforcing ribs are installed; the top plate unit 11 is positioned with a stopper to prevent displacement, and the height of the frame in the width direction of both sides is 0-8mm lower than the theoretical height to offset the warping on both sides when the rib plate is installed;

[0066] S33: Anchor diaphragm 16 units are made, such as Fig.17 As shown, the anchoring partition 16 unit is composed of a transverse partition 161, a longitudinal partition 162, an anchor pipe 163, a guide pipe 164, a pad 165, a reinforcing pipe 166, an internal rib plate 167, and an external rib plate 168. The transverse partition 161 is used as a reference for production. On the plate unit frame, the longitudinal and transverse reference lines of the partition and the rib plate installation lines are marked in sequence according to the drawings. After checking the markings, the reinforcing pipe 166 and the reinforcing connecting plate 169 are assembled in sequence. Due to the narrow space problem, the reinforcing connecting plate 169 is welded before the anchor pipe 163 is installed to achieve all welds. Before installation, the reinforcing pipe 166 is divided into two semicircular pipes, which are symmetrically arranged on the transverse partition. On both sides of the plate 161, the internal rib plate 167 is vertically arranged on the outside of the reinforcing tube 166, the reinforcing connecting plate 169 is arranged inside the reinforcing tube 166 vertically on the transverse diaphragm 161, and is aligned with the longitudinal diaphragm 162, the anchor tube 163 is butted against the mouth of the reinforcing tube 166, and a notch is opened before installation to connect with the transverse diaphragm 161 in a socket connection, the external rib plate 168 is vertically arranged on the outside of the reinforcing tube 166 and the anchor tube 163, and is not installed temporarily, and will be installed after the diaphragm is installed, the guide tube 164 is obliquely arranged at the end of the anchor tube 163 through the through hole, the pad 165 is passed through the cable tube and is closely attached to the anchor tube 163, and the through hole is not opened temporarily, and will be opened using the threading tool 9 after the beam section is assembled and turned over;

[0067] S34: Figures 8 to 10 As shown, draw a position line on the top plate unit 11, install the middle inner web unit 13, and then assemble the port matching partition 15, the anchor partition 16, and the solid web partition 17, and install them from the middle to both sides;

[0068] S35: Install the remaining outer web plate units 14 and bottom plate units 12.

[0069] In this embodiment, the specific steps of making the cantilever structure 5 in step S3 are as follows:

[0070] S36: Fig.11 As shown, the cantilever arm structure 5 is prefabricated into an assembly, with a lateral bending deviation of ≤5mm, a camber deviation of ≤8mm, a twist deviation of ≤6mm, a length deviation of ≤4mm, a diagonal deviation of ≤4mm, a height deviation of ≤2mm, and an overall width of ≤2mm; when the cantilever arm assembly is manufactured, the connecting plate of the lower bracket 4 is installed after the positioning of the lower bracket 4 is completed;

[0071] S37: Fig.12 As shown, the cantilever structure 5 is installed on both sides of the box beam structure 1, and the cantilever arms of multiple beam sections are connected by cantilever arm connecting plates, such as Fig.11 As shown, the connecting plate is not welded first, but welded after the overall measurement, and the holes on the connecting plate are integrally punched in the pre-assembly state.

[0072] In this embodiment, if Fig.13 As shown, after the arm structure 5 is installed in step S37, the lower bracket 4 is installed, and the lower bracket 4 is removed in sequence after the installation is completed. Fig.14 As shown, the aluminum-plastic mounting hole 54 at the lower edge of the outer web 51 of the cantilever arm is used as a reference to process the aluminum-plastic mounting hole 53 at the upper edge to achieve the unification of the upper and lower references, such as Fig.15 As shown, the beam section is turned 180 degrees.

[0073] S4: Assembling the beam segments formed in step S3 to form a steel bridge.

[0074] S41: Assemble the beam segments after turning over 180 degrees to simulate the bridge position line;

[0075] S42: Figures 17 to 19 As shown, the anchor pipe 163 pad 165 is installed on the anchor pipe 163;

[0076] S43: Make the guide tube assembly; the guide tube assembly is welded into an assembly by the guide tube 164, the stop ring 7 and the cable flange 8. It is necessary to ensure that the surface of the cable flange 8 is parallel to the center line of the guide tube 164, and the size requirement is ±1mm, that is, a 5mm margin is reserved for the flange. After the overall welding of the assembly is completed, the surface is machined to ensure the size and flatness requirements; after the guide tube 164 assembly is installed, a water hole is opened on the guide tube 164; the water pipe and the anchor pipe 163 are welded, and the water pipe is inserted into the water hole of the guide tube 164 and the wire pipe. Due to limited space, no welding is performed, and after painting, it is glued to ensure sealing.

[0077] S44: Install the guide tube 164 assembly on the anchor tube 163. The guide tube 164 hole (i.e. Fig.17 and Fig. 20 The through hole in the hole is not opened first. The initial position is measured on the pre-assembly line, and a 50mm hole is initially opened according to the measured position. Fig. 20 As shown, a threading tool 9 is set up to thread and fix the two ends of the thread head, and the direction of the line is measured to ensure that the direction of the line is the direction of the guide tube 164, and then according to the theoretical development of the intersection line of the guide tube 164 and the anchor tube 163 Figure 1 :1 Make a template, take the intersection of the line and the anchor pipe 163 as the center of the circle, use the expansion diagram to draw lines on the upper and lower sides of the anchor pipe 163, cut holes according to the lines, and then install the welding guide pipe 164 assembly;

[0078] S45: Install the upper bracket 3, using the aluminum-plastic plate installation holes on the upper edge of the outer web 51 of the cantilever arm as a reference, sequentially position and install the upper bracket 3, and drill a group of holes with the cantilever arm upper panel 52.

[0079] In this embodiment, if Figure 4 As shown, in step S41, the beam sections are spliced ​​together by screws 10, and a connecting plate is provided at the closing opening of the beam sections. The screws 10 respectively pass through the ports on the two closed beam sections to match the partition plate 15 and the connecting plate.

[0080] In this embodiment, the middle area of ​​the end of the beam segment is concave, and after the two beam segments are spliced, a ring is formed at the splicing point, and concrete is grouted in the ring to strengthen the connection between the beam segments.

[0081] In this embodiment, since the cantilever arm structure 5 is weak and cannot withstand the force of the turning beam section, turning ears are designed on the outer web unit 14 and the top plate unit 11. When the cantilever arm structure 5 is designed, in order to avoid interference between the wire ropes during turning, the cantilever arm structure 5 and the top plate unit 11 at the turning interference point need to be set as an embedded section, which is installed after the turning is completed. Fig.16 As shown, the web position and the partition position in the figure are the outer web unit 14 and the solid web partition 17 respectively.

[0082] Embodiment 2:

[0083] Different from the above embodiment, in this embodiment, Fig.21As shown, the threading tool 9 used in step S44 includes two vertically arranged first screw rods 91, two second screw rods 92 parallel to each other are horizontally arranged between the first screw rods 91, first sleeves 93 are connected to both ends of the second screw rod 92, a first nut 94 is arranged at the bottom of the first sleeve 93, and the first sleeve 93 and the first nut 94 are sleeved on the corresponding outer surface of the first screw rod 91; the surface of the second screw rod 92 is sleeved with a second sleeve 96, and the end of the second sleeve 96 is provided with a second nut sleeved on the surface of the second screw rod 92, and a hanger 95 is arranged on the second sleeve 96, and a wire hanging groove is opened on the hanger 95.

[0084] The first sleeve 93 moves up and down on the first screw and the second sleeve 96 moves left and right on the second screw 92, so that the position of the hanger 95 can be adjusted up and down and left and right. The hanger 95 can adjust the angle through the sleeve. A hanging wire groove is provided on the hanger 95 to prevent the positioning wire from sliding, thereby realizing the opening of guide tube 164 holes of different heights, lengths and angles.

[0085] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A method for manufacturing a steel bridge across a trunk bicycle highway, characterized in that: The steps include: S1: Divide the steel bridge into multiple beam segments; S2: Divide a single beam segment into a box beam structure (1), a cantilever structure (5), an upper support (3) and a lower support (4); S3: Processing and manufacturing the structures of the beam segment, and assembling them to form the beam segment; S4: Assembling the beam segments formed in step S3 to form a steel bridge.

2. The manufacturing method of a steel bridge for bicycle highway across a trunk line according to claim 1 is characterized in that: The specific steps of the process of manufacturing the box beam structure (1) in step S3 are as follows: S31: Divide the exterior of the box beam structure (1) into a top plate unit (11), a bottom plate unit (12), an inner web unit (13), and an outer web unit (14); and divide the interior of the box beam structure (1) into a port matching bulkhead (15), an anchoring bulkhead (16), and a solid web bulkhead (17); S32: manufacturing the top plate unit (11). Due to the size limitation of the steel plate, the top plate unit (11) is composed of multiple plate units. When cutting parts, a welding shrinkage allowance of 0.5‰ is placed on each plate unit, and a 50mm allowance is placed on both ends. The longitudinal and transverse reference lines of the plate unit of the top plate are checked, and the top plate unit (11) is placed on a molding frame to be assembled into a whole and reinforced ribs are installed. S33: Anchoring bulkhead (16) is manufactured. The anchoring bulkhead (16) is composed of a transverse bulkhead (161), a longitudinal bulkhead (162), an anchor pipe (163), a guide pipe (164), a pad (165), a reinforcing pipe (166), an internal rib plate (167), and an external rib plate (168). The transverse bulkhead (161) is used as a reference for manufacturing. The longitudinal and transverse reference lines of the bulkhead and the rib plate installation lines are marked in sequence on the plate unit frame according to the drawings. After checking the markings, the reinforcing pipe (166) and the reinforcing connecting plate (169) are assembled in sequence. Due to the narrow space problem, the reinforcing connecting plate (169) is welded before the anchor pipe (163) is installed and connected, so as to achieve full weld welding. Before the reinforcing pipe (166) is installed, it is divided into two semicircular pipes, which are symmetrically arranged. On both sides of the transverse diaphragm (161), the internal rib plate (167) is vertically arranged on the outside of the reinforcing tube (166), the reinforcing connecting plate (169) is vertically arranged on the transverse diaphragm (161) inside the reinforcing tube (166) and aligned with the longitudinal diaphragm (162), the anchor tube (163) is butted against the mouth of the reinforcing tube (166), a notch is opened before installation to be connected with the transverse diaphragm (161) in a socket connection, the external rib plate (168) is vertically arranged on the outside of the reinforcing tube (166) and the anchor tube (163), and is not installed temporarily, and is installed after the diaphragm is installed, the guide tube (164) is obliquely arranged at the end of the anchor tube (163) through the through hole, the pad (165) is passed through the cable tube and is closely attached to the anchor tube (163), the through hole is not opened temporarily, and is opened using a threading tool (9) after the beam section is assembled and turned over; S34: Draw a position line on the top plate unit (11), install the middle inner web plate unit (13), and then assemble the port matching baffle (15), the anchor baffle (16), and the solid web baffle (17), and install from the middle to both sides; S35: Install the remaining outer web plate units (14) and bottom plate units (12).

3. The manufacturing method of a steel bridge for bicycle highway across a trunk line according to claim 2 is characterized in that: The specific steps of making the cantilever structure (5) in step S3 are as follows: S36: prefabricate the cantilever arm structure (5) into an assembly, wherein the lateral bending deviation is ≤5mm, the camber deviation is ≤8mm, the twist deviation is ≤6mm, the length deviation is ≤4mm, the diagonal deviation is ≤4mm, the height deviation is ≤2mm, and the overall width is ≤2mm; when manufacturing the cantilever arm assembly, the connecting plate of the lower bracket (4) is installed after the positioning of the lower bracket (4) is completed; S37: Install the cantilever structure (5) to both sides of the box beam structure (1).

4. The method for manufacturing a steel bridge for bicycle highway across a trunk line according to claim 3 is characterized in that: After the installation of the cantilever arm structure (5) in step S37 is completed, the lower bracket (4) is installed for trial. After the lower bracket (4) is installed for trial, it is removed in sequence. The aluminum-plastic mounting hole (54) at the lower edge of the cantilever arm outer web (51) is used as a reference to process the aluminum-plastic mounting hole (53) at the upper edge to achieve the unification of the upper and lower references and turn the beam section 180 degrees.

5. The method for manufacturing a steel bridge for bicycle highway across a trunk line according to claim 4 is characterized in that: The specific assembly steps of the beam section in step S4 are as follows: S41: Assemble the beam segments after turning over 180 degrees to simulate the bridge position line; S42: Installing the anchor pipe (163) backing plate (165) on the anchor pipe (163); S43: manufacturing a guide tube assembly; S44: Install the guide tube assembly on the anchor tube (163), the guide tube hole on the anchor tube (163) is not opened first, the preliminary position is measured on the pre-assembly line, and a 50 mm hole is initially opened according to the measured position, and a threading tool (9) is set up to thread and fix the two ends of the thread head, and the direction of the thread is ensured to be the direction of the guide tube (164) by measurement, and then a template is made according to the 1:1 expansion diagram of the intersection line theory of the guide tube (164) and the anchor tube (163), and the intersection line of the thread and the anchor tube (163) is used as the center of the circle. The anchor tube (163) is marked with a line on the upper and lower sides using the expansion diagram, and a hole is cut according to the marked line, and then the guide tube (164) assembly is installed and welded; S45: Install the upper bracket (3), using the aluminum-plastic plate installation holes on the upper edge of the outer web (51) of the cantilever arm as a reference, sequentially position and install the upper bracket (3), and drill a group of holes on the upper panel (52) of the cantilever arm.

6. The method for manufacturing a steel bridge for bicycle highway across a trunk line according to claim 2, characterized in that: In the step S32, the top plate unit (11) is made to be positioned with a stopper to prevent displacement, and the tire frame height in the width direction on both sides is 0 to 8 mm lower than the theoretical height.

7. The method for manufacturing a steel bridge for bicycle highway across a trunk line according to claim 5, characterized in that: In step S44, the threading tool (9) comprises two vertically arranged first screw rods (91), two second screw rods (92) are horizontally arranged and parallel to each other between the first screw rods (91), the two ends of the second screw rod (92) are connected with a first sleeve (93), the bottom of the first sleeve (93) is provided with a first nut (94), the first sleeve (93) and the first nut (94) are sleeved on the outer surface of the corresponding first screw rod (91); the surface of the second screw rod (92) is sleeved with a second sleeve (96), the end of the second sleeve (96) is provided with a second nut sleeved on the surface of the second screw rod (92), the second sleeve (96) is provided with a hanger (95), and the hanger (95) is provided with a wire hanging groove.

8. The method for manufacturing a steel bridge for bicycle highway across a trunk line according to claim 5, characterized in that: In step S41, the beam sections are spliced ​​together by screw rods (10), a connecting plate is provided at the closing opening of the beam sections, and the screw rods (10) respectively pass through the ports on the two closed beam sections to match the partition plate (15) and the connecting plate.

9. The method for manufacturing a steel bridge for bicycle highway across a trunk line according to claim 8, characterized in that: The middle area at the end of the beam section is concave. After the two beam sections are spliced, a ring is formed at the joint, and concrete is poured into the ring to strengthen the connection between the beam sections.

10. The method for manufacturing a steel bridge for bicycle highway across a trunk line according to claim 4, characterized in that: Turning lifting ears are respectively designed on the sides of the outer web unit (14) and the top plate unit (11), and the cantilever arm structure (5) is designed, and the cantilever arm structure (5) and the top plate unit (11) at the turning interference position are set as embedded sections, which are installed after the turning is completed.

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