CN114535850A - Flatness control method for large-sized bridge supporting seat cushion plate - Google Patents

Flatness control method for large-sized bridge supporting seat cushion plate Download PDF

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Publication number
CN114535850A
CN114535850A CN202210175748.XA CN202210175748A CN114535850A CN 114535850 A CN114535850 A CN 114535850A CN 202210175748 A CN202210175748 A CN 202210175748A CN 114535850 A CN114535850 A CN 114535850A
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China
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plate
steel bridge
welding
support base
base plate
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CN202210175748.XA
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CN114535850B (en
Inventor
刘治国
孙磊
朱新华
张海峰
张剑峰
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China Railway Baoji Bridge Group Co Ltd
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China Railway Baoji Bridge Group Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0426—Fixtures for other work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/04—Bearings; Hinges
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00—Material constitution of bridges
    • E01D2101/30—Metal

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Bridges Or Land Bridges (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

The method for controlling the flatness of the supporting seat cushion plate of the large steel bridge comprises the following steps: temporarily welding a restraint beam, processing a support base plate, assembling a first diaphragm plate, assembling a middle stiffening plate, assembling a second diaphragm plate, assembling an outer side stiffening plate, assembling a connecting web plate, removing the restraint beam, assembling the support base plate, processing a support connecting hole, and finally welding the support base plate and a steel bridge base plate. The invention adopts the mounting sequence, the welding method and the temporary constraint method at the stiffening position of the support, ensures the planeness of the large-size support base plate and improves the manufacturing quality of the component at the support position of the steel bridge beam; the problems of poor mounting quality and large assembly gap of the conventional steel bridge support base plate are solved, and the mounting quality and the flatness of the large-size support base plate are ensured; the practicability is strong, the operation is simple, and the popularization is suitable.

Description

Flatness control method for large-sized bridge supporting seat cushion plate
Technical Field
The invention belongs to the technical field of supporting seat cushion plates for bridge parts of fixed buildings, and particularly relates to a flatness control method for a supporting seat cushion plate of a large steel bridge.
Background
For a large-scale steel bridge structure, the support base plate is an important force transmission and leveling component, and the flatness control of the support base plate is particularly important in the manufacturing process of the steel bridge.
Because the steel bridge has small self weight or different stress systems, the area of the bearing plate of the support of most steel bridges is less than or equal to 3m2. With the appearance of a large-span continuous beam or a large-span sling system steel bridge, a large-size support is required to be used as a bearing structure, so that the size of the support cushion plate of the steel bridge is larger and larger, and the area is larger than or equal to 8m2The support base plate.
The area of the traditional steel bridge support base plate is small, the influence of the welding deformation of the stiffening plate of the steel bridge base plate on the support base plate is very small, the flatness of the steel bridge support base plate can meet the manufacturing requirement almost without being controlled, and therefore, the technology in the aspect of flatness control of the support base plate is not available. But for the area that has occurred ≧ 8m2For the large-scale steel bridge support base plate, the problem of welding deformation is obvious, and the flatness control technology of the steel bridge support base plate needs to be developed. In view of this, the following technical solutions are proposed.
Disclosure of Invention
The technical problems solved by the invention are as follows: the method for controlling the flatness of the support base plate of the large-size steel bridge solves the technical problem that the flatness is difficult to control when the support base plate of the large-size steel bridge is manufactured by means of welding deformation control, specific installation sequence, temporary constraint and the like.
The technical scheme adopted by the invention is as follows: the method for controlling the flatness of the support cushion plate of the large steel bridge comprises the following steps:
s1, temporarily welding a restraint beam: the bottom of a steel bridge bottom plate at the assembling position of a steel bridge support base plate is provided with a plurality of restraint beams, the restraint beams are perpendicular to the extending direction of the diaphragm plate, and a restraint beam web plate is connected with the steel bridge bottom plate through a restraint beam horse plate of the restraint beams in a temporary welding mode.
S2, processing a support base plate: a plurality of bolt connecting holes which are uniformly distributed are processed on the periphery of the support base plate, and a plurality of welding connecting holes which are uniformly distributed are processed in the middle of the support base plate.
S3, assembling a first diaphragm plate: the first diaphragm plate is assembled on the steel bridge bottom plate according to a pre-drawn assembly position line, and before the first diaphragm plate is welded, a diaphragm plate horse plate is arranged in the welding line of the steel bridge bottom plate and the first diaphragm plate to prevent the first diaphragm plate and the steel bridge bottom plate from being welded and deformed.
S4, assembling the middle stiffening plate: and step S3, assembling and welding a plurality of intermediate stiffening plates after the welding seams of the steel bridge bottom plate and the first diaphragm plate are detected to be qualified.
S5, assembling a second diaphragm plate: and assembling a second transverse clapboard, arranging a single-side groove facing to the outer side in the installation range of the middle stiffening plate and the outer stiffening plate of the second transverse clapboard, and arranging a transverse clapboard horse plate along the welding line of the steel bridge bottom plate and the second transverse clapboard in advance before the second transverse clapboard is welded with the steel bridge bottom plate to prevent the second transverse clapboard from being welded and deformed with the steel bridge bottom plate.
S6, assembling the outer stiffening plate: assembling a plurality of outer stiffening plates between the steel bridge bottom plate and the transverse partition plate; and firstly welding penetration welding fillet welds between the outer stiffening plate and the transverse partition plate, and then welding fillet welds between the outer stiffening plate and the steel bridge bottom plate.
S7, assembling the connecting web: and step S6, after the assembly clearance between the outer side stiffening plate and the steel bridge bottom plate is checked to be qualified, welding the welding seam of the web plate and the outer side stiffening plate.
S8, releasing the restraint beam: and (4) removing the restraint beam, and detecting the flatness of the mounting position of the support base plate to ensure that the flatness is qualified.
S9, assembling a support base plate: marking an assembly position line at the bottom of the steel bridge bottom plate, and assembling a support base plate according to the assembly position line; when the support base plate is assembled, the welding connecting holes of the support base plate are welded from the middle to the outside in sequence, and the welding seams of the welding connecting holes are enabled not to exceed the plane of the support base plate.
S10, processing a support connecting hole: and processing a support connecting hole coaxially opposite to the bolt connecting hole by taking the bolt connecting hole on the support base plate as a reference.
S11, final welding of the support base plate and the steel bridge bottom plate: and (5) installing the steel bridge manufactured in the step (S10) in place, then welding fillet welds of the support base plate and the steel bridge bottom plate, and welding the support base plate and the steel bridge bottom plate into a whole.
In the above technical solution, further: in the steps S1 and S8, the cross section of the restraint beam is of a hollow box-shaped structure; a plurality of restraining beam horse boards are axially symmetric and uniformly distributed on the left side and the right side of the restraining beam box in the length direction; the inner side of the top end of the horse plate of the restraint beam is provided with a horse plate notch with an inwards concave arc structure.
In the above technical solution, preferably: in step S2, the bolt connection hole is a circular hole; the welding connecting hole is a square hole, and the bolt connecting hole and the welding connecting hole are manufactured by numerical control cutting processing.
In the above technical solution, preferably: in the step S3 and the step S5, the diaphragm plate and the steel bridge bottom plate are connected by welding through double-sided notch fillet welding.
In the above technical solution, preferably: in the step S4, welding a groove penetration fillet weld of the middle stiffening plate and the first diaphragm plate; welding a close-fitting fillet weld of the middle stiffening plate and the steel bridge bottom plate; wherein, the assembly clearance of the close fillet weld between the middle stiffening plate and the steel bridge bottom plate is less than or equal to 0.2 mm.
In the above technical solution, preferably: in step S6: welding a groove penetration fillet weld of the outer side stiffening plate and the transverse clapboard; welding a close-fitting fillet weld of the outer stiffening plate and the steel bridge bottom plate; wherein, the assembly clearance of the close fillet weld between the outer stiffening plate and the steel bridge bottom plate is less than or equal to 0.2 mm.
In the above technical solution, preferably: the stiffening plates are arranged at a position 0.2-0.3 m away from the edge of the support base plate and are symmetrically arranged.
In the above technical solution, preferably: in step S8, a steel plate ruler is adopted to detect the flatness; and the planeness is less than or equal to 2 mm.
In the above technical solution, preferably: in step S10, the holder attachment hole is formed by flame cutting.
In the technical scheme, the area of the bearing plate of the large-scale steel bridge support is more than or equal to 8m2。
Compared with the prior art, the invention has the advantages that:
1. the two diaphragm plates are adopted, and the stress at the position of the support is transmitted to the whole steel bridge through the two diaphragm plates, so that the stress is dispersed, and the supporting strength of the whole structure of the steel bridge is improved.
2. The stiffening plates are symmetrically arranged, so that the influence of the middle stiffening plate and the outer stiffening plate on the flatness of the steel bridge bottom plate after the steel bridge bottom plate is welded is reduced; the stiffening plate is arranged at a position 0.2-0.3 m away from the edge of the support base plate, so that the bearing requirement of the support base plate is met.
3. The thickness of the diaphragm plate is generally not less than 24mm, and in order to avoid welding angular deformation in the welding process, the diaphragm plate is welded by adopting double-sided symmetrical grooves, and a diaphragm plate horse plate is arranged before welding so as to control the welding deformation of the diaphragm plate again.
4. After the support base plate is assembled in place, the welding connecting holes are welded from the middle to the outside in sequence, so that the problem that the middle of the support base plate bulges after being welded on the periphery of the large-size support base plate is solved.
5. The flatness of the large-size support base plate is ensured by methods such as mounting sequence, welding method and temporary constraint at the support stiffening position, so that the manufacturing quality of the component at the support position of the steel bridge is improved; the problems of poor mounting quality and large assembly gap of the conventional steel bridge support base plate are solved, and the mounting quality and the flatness of the large-size support base plate can be ensured; the practicability is strong, the operation is simple, and the popularization is suitable.
Drawings
FIG. 1 shows that the area of the invention is more than or equal to 8m2The schematic diagram of the structure of the large steel bridge supporting seat cushion;
FIG. 2 is a structural state diagram of step S1 in the method of the present invention;
FIG. 3 is a diagram of the construction of the seat pad of step S2 in the method of the present invention;
FIG. 4 is a structural state diagram of step S3 of the method of the present invention;
FIG. 5 is a structural state diagram of step S4 in the method of the present invention;
FIG. 6 is a state diagram of the structure of step S5 in the method of the present invention;
FIG. 7 is a structural state diagram of step S6 in the method of the present invention;
FIG. 8 is a state diagram of the structure of step S7 in the method of the present invention;
FIG. 9 is a structural state diagram of step S8 of the method of the present invention;
FIG. 10 is a structural state diagram of step S9 of the method of the present invention;
FIG. 11 is a structural state diagram of step S10 of the method of the present invention;
FIG. 12 is a state diagram illustrating the structure of step S11 in the method of the present invention;
FIG. 13 is a schematic view of a restraining beam configuration used in step S1 of the method of the present invention;
in the figure: 1-a steel bridge bottom plate, 101-a diaphragm plate horse plate, 2-a diaphragm plate, 3-a middle stiffening plate, 4-an outer stiffening plate, 5-a connecting web plate, 6-a support connecting hole, 7-a support base plate, 701-a bolt connecting hole and 702-a welding connecting hole; 8-constraint beam, 801-constraint beam horse plate, 802-horse plate gap.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 13 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The large-sized steel bridge support cushion plate flatness control method comprises the following steps:
(as shown in figure 1) wherein the area of the support base plate of the large-scale steel bridge is more than or equal to 8m2. To avoid the problem of welding deformationComprises the following operation steps:
(as shown in fig. 2 and 13), step S1, temporary welding of the restraint beam: the bottom of the steel bridge bottom plate 1 at the assembling position of the steel bridge support base plate 7 is provided with a plurality of restraint beams 8, the restraint beams 8 are perpendicular to the extending direction of the diaphragm plate 2, and the restraint beams 8 are used for temporarily welding and connecting restraint beam webs with the steel bridge bottom plate 1 through restraint beam horse plates 801. Therefore, the flatness of the steel bridge bottom plate 1 is ensured by arranging the restraint beams.
In the above embodiment, further: the cross section of the restraint beam 8 is of a hollow box-shaped structure; the self weight is reduced. Furthermore, a plurality of restraining beam horse boards 801 are axially symmetrically and uniformly distributed on the left side and the right side of the restraining beam 8 in the box-shaped length direction; the flatness of temporary welding of the restraining beam is ensured by the restraining beam horse plate 801. Restraint crossbeam horse board 801 top inboard has the horse board breach 802 of indent arc structure, sets up horse board breach 802, the dismantlement in the convenient restraint crossbeam 8 later stage.
In the above embodiment, preferably: the distance between the plurality of restraint beams 8 is 600 mm-850 mm; the distance between adjacent restraining beam horse boards 801 is 400-600 mm. The bearing plate area of the large-scale steel bridge bearing is more than or equal to 8m2The flatness maintenance requirement of (2).
(as shown in fig. 3), step S2, machining the seat cushion: a plurality of bolt connecting holes 701 which are uniformly distributed are processed on the periphery of the support base plate 7 and are uniformly distributed, and the stress is uniformly distributed; and a plurality of welding connection holes 702 which are uniformly distributed are processed in the middle of the support base plate 7, the welding connection holes are used for fixedly connecting the support base plate 7 and the steel bridge base plate 1 in a welding manner, and the bolt connection holes 701 are used for fixedly mounting the whole support base plate of the large-scale steel bridge.
In the above embodiment, in step S2, the bolt coupling hole 701 is a circular hole; the welding connection hole 702 is a square hole, and the bolt connection hole 701 and the welding connection hole 702 are manufactured through numerical control cutting, so that the structural stability is guaranteed while the hole precision is fully guaranteed.
In the above embodiment, preferably: 6-12 welding connecting holes 702 are provided; the width of the welding connection hole 702 is more than or equal to 20mm, and the length is more than or equal to 100mm, so that the sufficient welding connection strength is ensured.
(fig. 4) step S3, assembling the first diaphragm: and assembling the first diaphragm plate 2 on the steel bridge bottom plate 1 according to a pre-drawn assembly position line. Before the first diaphragm plate 2 is welded, a diaphragm plate horse plate 101 is arranged on the inner edge of a welding line of the steel bridge bottom plate 1 and the first diaphragm plate 2 to prevent the first diaphragm plate 2 and the steel bridge bottom plate 1 from being welded and deformed.
In the above embodiment, in step S3, the thickness of the plate body of the diaphragm plate 2 is greater than or equal to 24 mm; the distance between the transverse clapboard horse boards 101 is 400 mm-500 mm; the diaphragm plate 2 and the steel bridge bottom plate 1 are connected by adopting double-sided groove fillet weld welding, so that the welding deformation of the diaphragm plate and the steel bridge bottom plate 1 is avoided.
(as shown in fig. 5), step S4, assembling the intermediate stiffener: and S3, after the welding seams of the steel bridge bottom plate 1 and the first diaphragm plate 2 are detected to be qualified, namely no deformation exists, assembling and welding a plurality of middle stiffening plates 3.
In the above embodiment, further: in the step S4, welding the groove penetration fillet weld of the middle stiffening plate 3 and the first diaphragm plate 2; welding a close-fitting fillet weld of the middle stiffening plate 3 and the steel bridge bottom plate 1; wherein, the assembly clearance of the close fillet weld between the middle stiffening plate 3 and the steel bridge bottom plate 1 is less than or equal to 0.2 mm.
Wherein, five middle stiffening plates 3 vertical to the transverse clapboard 2 are arranged, and the distance between the five middle stiffening plates 3 is 0.3 m-0.5 m.
Preferably: the middle stiffening plate 3 and the diaphragm plate 2 are welded by adopting a bevel fillet weld, and the middle stiffening plate 3 and the steel bridge bottom plate 1 are connected by adopting 'close contact and fillet weld', so that the stress performance of the whole structure at the position of the support is effectively improved.
(as shown in fig. 6), step S5, assembling the second diaphragm: and assembling the second transverse partition plate 2, and arranging an outward single-sided groove in the installation range of the middle stiffening plate 3 and the outer stiffening plate 4 of the second transverse partition plate 2. Before the second diaphragm plate 2 is welded with the steel bridge bottom plate 1, a diaphragm plate horse plate 101 is arranged in advance along the welding seam of the steel bridge bottom plate 1 and the second diaphragm plate 2 so as to prevent the second diaphragm plate 2 from being welded with the steel bridge bottom plate 1.
In the above embodiment, further: in step S5, the thickness of the plate body of the diaphragm plate 2 is more than or equal to 24 mm; the distance between the transverse clapboard horse boards 101 is 400 mm-500 mm; the diaphragm plate 2 and the steel bridge bottom plate 1 are welded and connected by adopting a double-sided bevel fillet weld. The distance between the two diaphragm plates 2 is 1 m-1.5 m.
Therefore, the two transverse partition plates 2 are adopted, stress at the support position is transmitted to the whole steel bridge through the two transverse partition plates 2, stress is dispersed, and the supporting strength of the whole structure of the steel bridge is improved.
Furthermore, because the thickness of the diaphragm plate 2 is generally not less than 24mm, in order to avoid welding angular deformation in the welding process, the diaphragm plate 2 adopts double-sided symmetrical groove welding, and the diaphragm plate horse plate 101 is arranged before welding so as to control the welding deformation of the diaphragm plate again.
(as shown in fig. 7), step S6, assembling the outer stiffener: and a plurality of outer stiffening plates 4 are assembled between the steel bridge bottom plate 1 and the diaphragm plates 2. The welding sequence during welding is as follows: the fusion penetration welding fillet between the outer side stiffening plate 4 and the transverse clapboard 2 is welded firstly, and then the fillet between the outer side stiffening plate 4 and the steel bridge bottom plate 1 is welded so as to avoid the welding deformation problem.
In the above embodiment, further: in step S6: welding a groove penetration fillet weld of the outer side stiffening plate 4 and the transverse clapboard 2; welding the close-contact fillet weld of the outer stiffening plate 4 and the steel bridge bottom plate 1; wherein, the assembly clearance of the close fillet weld between the outer stiffening plate 4 and the steel bridge bottom plate 1 is less than or equal to 0.2 mm.
In the above embodiment, further: the outer side stiffening plates 4 are arranged at a position 0.2-0.3 m away from the edge of the support base plate 7, and the outer side stiffening plates 4 and the middle stiffening plates 3 are symmetrically arranged.
The outer stiffening plates 4 and the middle stiffening plates 3 are symmetrically arranged, so that the influence of the middle stiffening plates 3 and the outer stiffening plates 4 on the flatness of the steel bridge bottom plate 1 after the steel bridge bottom plate 1 is welded is reduced; the outer stiffening plate 4 is arranged at a position 0.2-0.3 m away from the edge of the support base plate 7, so that the bearing requirement of the support base plate 7 is met.
(as shown in fig. 8) step S7, assembling the connecting web: and step S6, after the assembly gap between the outer side stiffening plate 4 and the steel bridge bottom plate 1 is checked to be qualified, welding the welding seam connecting the web 5 and the outer side stiffening plate 4.
(as shown in fig. 9) step S8, releasing the restraining beam: and (4) removing the restraint beam 8, and detecting the flatness of the mounting position of the support base plate 7 to ensure that the flatness is qualified.
In the above embodiment, further: in step S8, a steel plate ruler is adopted to detect the flatness; and the planeness is less than or equal to 2 mm.
(as shown in fig. 10), step S9, assembling the seat cushion: marking an assembly position line at the bottom of the steel bridge bottom plate 1, and assembling a support base plate 7 according to the assembly position line; when the support base plate 7 is assembled, the welding connection holes 702 of the support base plate 7 are welded in sequence from the middle to the outside, and the welding seams of the welding connection holes 702 are not allowed to exceed the plane of the support base plate 7.
Therefore, after the support base plate 7 is assembled in place, the welding connection holes 702 are welded from the middle to the outside in sequence, so that the problem that the middle of the support base plate 7 bulges after being welded on the circumference is solved.
(shown in fig. 11) step S10, processing the support connecting hole: the mount attachment hole 6 coaxially opposed to the bolt attachment hole 701 is processed with the bolt attachment hole 701 on the mount pad 7 as a reference.
In the above embodiment, further: in step S10, the holder attachment hole 6 is formed by flame cutting.
(as shown in fig. 12) step S11, final welding the seat backing plate and the steel bridge bottom plate: and (5) installing the steel bridge manufactured in the step (S10) in place, then welding fillet welds of the support base plate 7 and the steel bridge bottom plate 1, and welding the support base plate 7 and the steel bridge bottom plate 1 into a whole.
In conclusion, the flatness of the large-size support base plate is ensured by methods such as mounting sequence, welding method and temporary constraint at the support stiffening position, so that the manufacturing quality of the component at the support position of the steel bridge beam is improved; the problems of poor mounting quality and large assembly gap of the conventional steel bridge support base plate are solved, and the mounting quality and the flatness of the large-size support base plate can be ensured; the practicability is strong, the operation is simple, and the popularization is suitable.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. The method for controlling the flatness of the support cushion plate of the large steel bridge is characterized by comprising the following steps of:
s1, temporarily welding a restraint beam: arranging a plurality of restraint beams (8) at the bottom of a steel bridge bottom plate (1) at the assembling position of a steel bridge support base plate (7), enabling the restraint beams (8) to be perpendicular to the extending direction of a diaphragm plate (2), and temporarily welding and connecting a restraint beam web plate and the steel bridge bottom plate (1) by the restraint beams (8) through restraint beam horse plates (801) arranged on the restraint beams;
s2, processing a support base plate: a plurality of bolt connecting holes (701) which are uniformly distributed are processed on the periphery of the support base plate (7), and a plurality of welding connecting holes (702) which are uniformly distributed are processed in the middle of the support base plate (7);
s3, assembling a first diaphragm plate: assembling a first diaphragm plate (2) on a steel bridge bottom plate (1) according to a pre-drawn assembly position line, and before welding the first diaphragm plate (2), arranging a diaphragm plate horse plate (101) in a welding seam of the steel bridge bottom plate (1) and the first diaphragm plate (2) along the inner edge to prevent the first diaphragm plate (2) and the steel bridge bottom plate (1) from welding deformation;
s4, assembling the middle stiffening plate: after the welding seams of the steel bridge bottom plate (1) and the first diaphragm plate (2) in the step S3 are detected to be qualified, assembling and welding a plurality of middle stiffening plates (3);
s5, assembling a second diaphragm plate: assembling a second transverse clapboard (2), arranging an outward single-side groove in the installation range of a middle stiffening plate (3) and an outer stiffening plate (4) of the second transverse clapboard (2), and arranging a transverse clapboard horse plate (101) along the welding line of the steel bridge bottom plate (1) and the second transverse clapboard (2) in advance before the second transverse clapboard (2) is welded with the steel bridge bottom plate (1) to prevent the second transverse clapboard (2) and the steel bridge bottom plate (1) from welding deformation;
s6, assembling the outer side stiffening plate: a plurality of outer stiffening plates (4) are assembled between the steel bridge bottom plate (1) and the transverse partition plate (2); firstly welding a penetration welding fillet weld between the outer side stiffening plate (4) and the transverse clapboard (2), and then welding a fillet weld between the outer side stiffening plate (4) and the steel bridge bottom plate (1);
s7, assembling the connecting web: after the assembly gap between the outer side stiffening plate (4) and the steel bridge bottom plate (1) in the step S6 is checked to be qualified, welding seams for connecting the web plate (5) and the outer side stiffening plate (4) are welded;
s8, releasing the restraint beam: the restraint beam (8) is removed, and the flatness of the mounting position of the support base plate (7) is detected, so that the flatness is qualified;
s9, assembling a support base plate: marking an assembly position line at the bottom of the steel bridge bottom plate (1), and assembling a support base plate (7) according to the assembly position line; when the support base plate (7) is assembled, welding connecting holes (702) of the support base plate (7) are welded from the middle to the outside in sequence, and welding seams of the welding connecting holes (702) are enabled not to exceed the plane of the support base plate (7);
s10, processing a support connecting hole: processing a support connecting hole (6) coaxially opposite to the bolt connecting hole (701) by taking the bolt connecting hole (701) on the support base plate (7) as a reference;
s11, final welding of the support base plate and the steel bridge bottom plate: and (5) installing the steel bridge manufactured in the step (S10) in place, then welding fillet welds of the support base plate (7) and the steel bridge bottom plate (1), and welding the support base plate (7) and the steel bridge bottom plate (1) into a whole.
2. The flatness control method for the large-scale steel bridge supporting cushion plate according to claim 1, characterized in that: in the steps S1 and S8, the section of the restraint beam (8) is of a hollow box-shaped structure; the left side and the right side of the box-shaped length direction of the restraint beam (8) are axisymmetric and are uniformly provided with a plurality of restraint beam horse boards (801); the inner side of the top end of the restraint beam horse plate (801) is provided with a horse plate notch (802) with an inwards concave arc structure.
3. The flatness control method for the large-scale steel bridge supporting cushion plate according to claim 1, characterized in that: in step S2, the bolt connection hole (701) is a circular hole; the welding connecting hole (702) is a square hole, and the bolt connecting hole (701) and the welding connecting hole (702) are manufactured by numerical control cutting.
4. The flatness control method for the large-scale steel bridge supporting cushion plate according to claim 1, characterized in that: in the step S3 and the step S5, the diaphragm plate (2) and the steel bridge bottom plate (1) are welded and connected by adopting a double-side bevel fillet weld.
5. The flatness control method for the large-scale steel bridge supporting cushion plate according to claim 1, characterized in that: in the step S4, welding the groove penetration fillet weld of the middle stiffening plate (3) and the first diaphragm plate (2); welding a close-fitting fillet weld of the middle stiffening plate (3) and the steel bridge bottom plate (1); wherein the assembly clearance of the close fillet weld between the middle stiffening plate (3) and the steel bridge bottom plate (1) is less than or equal to 0.2 mm.
6. The flatness control method for the large-scale steel bridge supporting cushion plate according to claim 1, characterized in that: in step S6: welding a groove penetration fillet weld of the outer side stiffening plate (4) and the transverse clapboard (2); welding a close-contact fillet weld of the outer stiffening plate (4) and the steel bridge bottom plate (1); wherein, the assembly clearance of the close-contact fillet weld between the outer stiffening plate (4) and the steel bridge bottom plate (1) is less than or equal to 0.2 mm.
7. The flatness control method for the large-scale steel bridge supporting cushion plate according to claim 5 or 6, characterized in that: the stiffening plates are arranged at a position 0.2-0.3 m away from the edge of the support base plate (7) and are symmetrically arranged.
8. The flatness control method for the large-scale steel bridge supporting cushion plate according to claim 1, characterized in that: in step S8, a steel plate ruler is adopted to detect the flatness; and the planeness is less than or equal to 2 mm.
9. The flatness control method for the large-sized steel bridge supporting seat cushion plate according to claim 1, is characterized in that: in step S10, the holder attachment hole (6) is formed by flame cutting.
10. The flatness control method for the large-scale steel bridge supporting cushion plate according to claim 1, characterized in that: the area of the bearing plate of the large-scale steel bridge support is more than or equal to 8m2。
CN202210175748.XA 2022-02-25 2022-02-25 Control method for planeness of large-scale steel bridge support backing plate Active CN114535850B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101372061A (en) * 2008-09-28 2009-02-25 武汉船用机械有限责任公司 Welding method of high mirror-finished sheet in bridge support sliding panel assembly
KR20180120927A (en) * 2017-04-28 2018-11-07 한국철도기술연구원 Steel plate girder through bridge for noise reduction and the construction method thereof
CN109530949A (en) * 2018-12-26 2019-03-29 江苏中铁山桥重工有限公司 A kind of large-scale bridge support backing plate welding method
CN111485489A (en) * 2020-06-03 2020-08-04 中铁宝桥集团有限公司 Large bridge support base plate and connecting method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101372061A (en) * 2008-09-28 2009-02-25 武汉船用机械有限责任公司 Welding method of high mirror-finished sheet in bridge support sliding panel assembly
KR20180120927A (en) * 2017-04-28 2018-11-07 한국철도기술연구원 Steel plate girder through bridge for noise reduction and the construction method thereof
CN109530949A (en) * 2018-12-26 2019-03-29 江苏中铁山桥重工有限公司 A kind of large-scale bridge support backing plate welding method
CN111485489A (en) * 2020-06-03 2020-08-04 中铁宝桥集团有限公司 Large bridge support base plate and connecting method thereof

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