CN112942053A - Bolt type steel box girder and manufacturing method thereof - Google Patents
Bolt type steel box girder and manufacturing method thereof Download PDFInfo
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- CN112942053A CN112942053A CN202110176854.5A CN202110176854A CN112942053A CN 112942053 A CN112942053 A CN 112942053A CN 202110176854 A CN202110176854 A CN 202110176854A CN 112942053 A CN112942053 A CN 112942053A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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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
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- 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
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Abstract
The invention discloses a latch type steel box girder and a manufacturing method thereof, which adopt a method of manufacturing an open type box girder and a box girder combined in a same body, solve the problems of weak rigidity and insufficient stability of an open type large-span box girder, break through the structural type of the original steel rail girder, play the technical problems of reducing the thickness of the steel plate, saving steel, reducing the self weight of the steel girder and enhancing the structural strength and stability of the steel girder, and provide reference basis for similar steel box rail girders of overhead rails and steel structures of bridges in the future.
Description
Technical Field
The invention belongs to the technical field of processing of steel box girders, bridges and steel structures of overhead rails, and particularly relates to a latch type steel box girder and a manufacturing method thereof.
Background
The air rail train is a new urban rail vehicle developed by the modern urban traffic in recent years, is different from the vehicles such as subways, light rails, magnetic levitation and the like, is the most environment-friendly vehicle at present, is moved to the air from ground traffic, can relieve the increasingly growing traffic jam problem of cities on the basis of not expanding the existing urban road facilities, and has a plurality of outstanding characteristics and advantages in the aspects of construction and operation. With the rapid development of cities, the space of ground infrastructure is continuously compressed, and the construction of air tracks is increasingly promoted to the infrastructure project agenda of various cities. With the high-speed development of economy in China, the traffic of railways, highways, high-rise buildings and the like also changes greatly. The development of the railway bridge or the steel structure engineering technology with special functions is further promoted. Novel structure, light and handy, bearing capacity is strong. The cross section form of a general steel beam has H type, T type, box type, rhombus, non-type and other varieties, a non-type open type box beam is generally adopted in an aerial track beam, the rigidity of a large-span steel beam under the same tonnage condition is relatively weak, the development and development of a novel steel beam are also promoted continuously, more and more countries and cities are attracted, and the bolt type steel box track beam solves the problem that the span and the rigidity of the steel beam are increased under the condition of the same open type tonnage. In the process of running under the same condition, the material can run more safely and can play the maximum role of the material. At present, no actual running air rail line exists in China, no mature rail steel box girder manufacturing experience exists, the bolt type steel box rail girder is a novel structural form in China, the problems of span and rigidity of steel girders are solved under the condition of the same open tonnage, the air rail also becomes the direction and trend of future development of modern cities, and the novel bolt type steel box rail girder manufacturing method has important scientific significance and engineering value.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a latch type steel box girder and a manufacturing method thereof.
The key of innovation of the invention is a latch type steel beam and a manufacturing method thereof, which are applied to the industries of urban air rail transit, bridges and other steel structure beams, so that under the condition of the same tonnage of steel, the span of the steel beam is prolonged, the rigidity of the steel beam is enhanced, the safety is ensured, the raw materials are saved, and the cost is reduced.
The specific technical scheme of the invention is as follows:
a latch type steel box girder manufacturing method comprising the steps of:
step 1: BIM modeling:
building a BIM model by adopting Tekla Structure software, carrying out equal-proportion expansion lofting on a curve and/or a straight line of the bolt-shaped beam to ensure that the reached model of the part is consistent with an actual beam section, and exporting NC file data for preparing numerical control blanking;
step 2: precision blanking of plates:
unfolding curved surface (or linear) parts through BIM software, outputting the curved surface (or linear) parts together with other parts as NC files, introducing the NC files into intelligent typesetting jacking software for material optimization typesetting, then directly introducing data into a high-precision numerical control plasma or flame cutting machine for plate blanking, and obtaining the parts with unfolded patterns or irregular parts, wherein the parts mainly comprise a top plate, a latch plate, a web plate, a bottom plate, longitudinal ribs of the bottom plate, a vertical stiffening plate, a transverse clapboard in a box and an end supporting plate;
and step 3: manufacturing a plate unit:
301. manufacturing a rail wing plate unit: after the parts are fed, the bottom plate and the bottom plate stiffening plate are assembled, the bottom plate stiffening plate end is taken as a control point to assemble the bottom plate continuous stiffening plate, and after welding is finished, fine flame adjustment or mechanical correction is carried out according to the linear type to form a curved or linear track bottom plate unit;
302. manufacturing a web plate unit: the steel beam web and the stiffening ribs are firstly assembled and welded, then are assembled and welded with the track bottom plate unit, fine adjustment is carried out according to the line type, the vertical perpendicularity of the track bottom plate and the web is strictly controlled, and finally a curved surface or linear web unit is formed;
and 4, step 4: manufacturing a jig frame:
firstly, carrying out ground sample lofting, carrying out parallel projection on the appearance of the bolt-shaped steel beam and the ground, carrying out integral assembly by adopting a flip-chip method according to the structural characteristics of the bolt-shaped steel beam, in order to ensure the integral line type and precision of the bolt-shaped beam, when the jig frame is manufactured, arranging control point parameters on the jig frame, leading out all the control points by BIM model data, welding the jig frame by upright posts, cross beams, longitudinal beams and other section steel, arranging a fine adjustment screw rod at the top end of the jig frame, accurately controlling the height parameters of the jig frame surface by the fine adjustment screw rod, wherein the horizontal height is +/-0.5 mm from the standard value
And 5: assembling the bolt-type steel beams:
501. laying and fixing the top plate: the top plate is flatly laid on the jig frame, the position of the top plate unit is adjusted by taking the ground sample line as a reference, the top plate unit is tightly attached to the jig frame, and meanwhile, the periphery of the top plate unit is fixed by using the code plates so as to prevent the top plate from moving in a staggering manner in the total splicing process;
502. assembling the partition boards: assembling the transverse partition plates on the top plate unit, assembling the transverse partition plates according to the position lines of the partition plates marked on the top plate during assembling, and controlling the vertical verticality of the partition plates by using a plumb in the assembling process, wherein the verticality deviation is +/-1.5 mm, and the partition plate position precision deviation is +/-1.5 mm;
503. assembling a web: after the transverse partition plate is assembled, the web plate units are lifted to corresponding positions, the web plate panels are closely attached to the edges of the transverse partition plates in each box by adopting edge top constant pressure, the assembling verticality of the web plate is less than 3mm, and the web plate, the partition plates and the bottom plate are fixed in a spot welding mode after the assembly is qualified;
504. assembling a latch plate: after web plate assembly and internal welding are completed, hoisting the latch plate unit to a corresponding position, pressurizing the latch plate unit to enable the latch plate unit to be closely attached to the edge of the partition plate, checking the distance of the web plate, and fixing the latch plate, the web plate and the partition plate in a spot welding mode after the deviation is +/-1 mm;
505. welding the bolt-shaped steel beam: after the bolt-shaped beam is assembled and molded, welding an internal welding seam;
506. assembling a bolt type steel beam end supporting plate: after the welding of the bolt-shaped beam is completed and the geometric dimension is finely adjusted, the support plates are assembled according to the serial numbers in sequence, the support plates are positioned in vacant positions, holes at two ends are used as the center, the distance deviation is +/-2 mm, after the bolt-shaped beam is inspected to be qualified, the support plates are fixed with the top plate and the bottom plate in a spot welding mode, the welding of the support plates is completed, and finally the bolt-shaped steel beam end sealing plate is assembled.
Preferably, in step 505, welding is performed according to the following welding sequence: 1) firstly welding an inner welding seam, and then welding an outer welding seam; 2) firstly, adopting intermittent welding for positioning, and then carrying out full welding; 3) symmetrically welding; 4) welding short welding seams first and then welding long welding seams; 5) firstly, welding parts with smaller deformation influenced by welding, and then welding the welding seams with larger deformation; in order to ensure the dimensional accuracy of the box openings at the two ends, the support can be added and fixed at the box openings before welding.
As a preferable technical scheme, the curvature or straightness of the curved or linear track bottom plate unit is less than 3 mm.
Preferably, the curvature or straightness of the curved or straight web unit is less than 3 mm.
As the preferred technical scheme, the perpendicularity between the web plate and the bottom plate is +/-1 mm
As a preferred technical scheme, the dimensional tolerance of the parts is +/-1 mm.
The utility model provides a bolt type steel case roof beam, includes roof, bolt board, web, bottom plate longitudinal rib, vertical stiffening rib, incasement cross slab and end backup pad, the roof lower extreme sets up the incasement cross slab, the web is two, sets up respectively the both sides of incasement cross slab, just the upper and lower both ends of web respectively with the roof with the bottom plate links to each other, the bolt board sets up between two webs, and is in incasement cross slab below, the end backup pad is fixed with roof, bottom plate spot welding, the bottom plate longitudinal rib is installed the bottom plate below, vertical stiffening rib sets up to two, and welds with two webs respectively.
Preferably, the web is closely attached to the edges of the horizontal partitions in the box.
Preferably, the latch plate is closely attached to the edge of the transverse partition plate in the box.
As a preferable technical scheme, the number of the transverse clapboards in the box is 3.
Has the advantages that:
the invention adopts the integrated manufacturing of the open type and box girder combination, solves the problems of weak rigidity and insufficient stability of the open type large-span box girder, breaks through the structural type of the original steel track girder, reduces the thickness of the steel plate, saves steel, lightens the self weight of the steel girder and enhances the structural strength and stability of the steel girder, and provides reference basis for similar steel box track girders of overhead tracks and steel structures of bridges in the future.
By adopting the latch type steel box girder and the manufacturing method, the advantages of materials can be fully exerted, the material utilization rate is improved, the structural rigidity is enhanced, and the design requirement is met. The defects of H-shaped, T-shaped, box-shaped, diamond-shaped, deformed and the like in the cross section of the conventional steel beam are overcome, and the rigidity of the large-span steel beam is obviously weak if the cross section of the common overhead track beam is deformed at present.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic elevation structure of the present invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
Fig. 3 is a sectional view taken along line B-B of fig. 1.
Fig. 4 is a sectional view of fig. 1 through 1.
Fig. 5 is a cross-sectional view 2-2 of fig. 1.
Fig. 6 is a cross-sectional view of 3-3 of fig. 1.
Fig. 7 is a cross-sectional view 4-4 of fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention will now be further described with reference to the accompanying drawings.
Referring to fig. 1 to 7, a latch type steel box girder includes a top plate N1, a latch plate N2, a web plate N3, a bottom plate N4, a bottom plate longitudinal rib N7, vertical stiffening ribs N6a, N6b, a box internal transverse partition plate N5a, N5b, N5c, and end support plates N8, N9, wherein the lower end of the top plate N1 is provided with a box internal transverse partition plate N5a, N5b, N5c, the web plates N3 are two and are respectively provided at two sides of the box internal transverse partition plate N5a, N5b, N5c, the upper and lower ends of the web plate N3 are respectively connected with the top plate N1 and the bottom plate N4, the latch plate N2 is provided between the two web plates N3 and is located below the box internal transverse partition plate N5a, N72 is fixed below the bottom plate N a, and the vertical stiffening ribs N72 are welded below the bottom plate N a, and the bottom plate N366.
The manufacturing method of the latch type steel box girder comprises the following steps:
first step BIM modeling:
the bolt type steel beam is in a space hyperboloid shape, the deepening design and the processing and manufacturing difficulty are high, in order to guarantee the overall linear size and the manufacturing precision of the bolt type beam, a Tekla Structure software is adopted to establish a high-precision BIM model, a bolt type beam curve (or straight line) is expanded and lofted in equal proportion, parts reach the model and are kept consistent with an actual beam section, and finally NC file data are exported to be ready for numerical control blanking.
Second, precision blanking of the plate:
and (5) blanking by adopting a high-precision cutting machine. The curved surface (or straight line) parts are unfolded through BIM software and output together with other parts as NC files to be imported into intelligent typesetting nesting software for material optimization typesetting. And then directly introducing the data into a high-precision numerical control plasma or flame cutting machine to perform plate blanking, and obtaining parts with unfolded patterns or irregular parts. The parts mainly comprise a top plate, a latch plate, a web plate, a bottom plate longitudinal rib, a vertical stiffening plate, an in-box diaphragm plate and an end supporting plate. The dimensional tolerance of the parts is +/-1 mm.
Step three, manufacturing a plate unit:
1. manufacturing a rail wing plate unit: after the parts are fed, the bottom plate and the bottom plate stiffening plate are assembled, the bottom plate stiffening plate end is used as a control point to assemble the bottom plate continuous stiffening plate, and after welding is completed, fine flame adjustment or mechanical correction is carried out according to line type to form a curved or linear track bottom plate unit. The curvature or straightness is less than 3 mm.
2. Manufacturing a web plate unit: the steel beam web and the stiffening ribs are firstly assembled and welded, then are assembled and welded with the track bottom plate unit, fine adjustment is carried out according to the line type, the vertical perpendicularity of the track bottom plate and the web is strictly controlled, and finally a curved surface or linear web unit is formed. The curvature or the straightness is less than 3mm, and the perpendicularity between the web plate and the bottom plate is +/-1 mm.
Fourthly, manufacturing a jig frame:
before the jig frame is manufactured, the ground is lofted, and the shape of the bolt-shaped steel beam is projected in parallel to the ground. According to the structural characteristics of the bolt-shaped steel beam, the whole assembly is carried out by adopting a flip-chip method. In order to ensure the integral line type and the precision of the bolt type beam, when the jig frame is manufactured, parameters such as control points are arranged on the jig frame, and the control points are all derived from BIM model data. The bed-jig is formed by welding profile steels such as stand, crossbeam, longeron, and the bed-jig top sets up fine setting adjusting screw, through fine setting adjusting screw accurate control bed-jig face height parameter. Horizontal elevation and standard value +/-0.5 mm
Fifthly, assembling the bolt-shaped steel beams:
1. laying and fixing the top plate: tiling the roof on the bed-jig to ground sample line is the benchmark, adjusts roof unit position to closely laminate with the bed-jig, adopt the sign indicating number board to roof unit fixed all around simultaneously, prevent always to piece together in-process roof dislocation.
2. Assembling the partition boards: the transverse partition plates are assembled on the top plate units, the transverse partition plates are assembled by the position lines of the partition plates marked on the top plate during assembly, and the vertical verticality of the partition plates is controlled by a plumb in the assembly process, wherein the verticality deviation is +/-1.5 mm, and the partition plate position precision deviation is +/-1.5 mm.
3. Assembling a web: after the diaphragm plate is assembled, the web plate unit is lifted to a corresponding position (the bottom plate is arranged on the upper side), the web plate panel is tightly attached to the edge of each diaphragm plate by adopting edge top constant pressure, the assembling verticality of the web plate is smaller than 3mm, and the web plate, the diaphragm plate and the bottom plate are fixed in a spot welding mode after the assembly is qualified.
4. Assembling a latch plate: and after web plate assembly and internal welding are completed, hoisting the latch plate unit to a corresponding position, pressurizing the latch plate unit to enable the latch plate unit to be closely attached to the edge of the partition plate, and checking the distance of the web plate to obtain the deviation of +/-1 mm. And after the product is qualified, the bolt plate, the web plate and the partition plate are fixed in a spot welding manner.
5. Welding the bolt-shaped steel beam: and after the bolt-shaped beam is assembled and molded, welding an inner welding seam. The welding sequence mainly follows the following principles: 1) firstly welding an inner welding seam, and then welding an outer welding seam; 2) firstly, adopting intermittent welding for positioning, and then carrying out full welding; 3) symmetrically welding; 4) welding short welding seams first and then welding long welding seams; 5) firstly, welding parts with smaller deformation influenced by welding, and then welding the welding seams with larger deformation; in order to ensure the dimensional accuracy of the box openings at the two ends, the support can be added and fixed at the box openings before welding.
6. Assembling a bolt type steel beam end supporting plate: after the bolt-shaped beam is welded and the geometric dimension is finely adjusted, the supporting plates are correspondingly assembled according to the numbers in sequence, the supporting plates are positioned in vacant positions, and the distance deviation is +/-2 mm by taking holes at two ends as the center. And after the inspection is qualified, the supporting plate is fixed with the top plate and the bottom plate in a spot welding manner to complete the welding of the supporting plate, and finally the bolt-shaped steel beam end sealing plate is assembled.
After the integral latch-type steel beam is finished, the quality of the integral geometric dimension and the appearance need to be detected and checked, and sand blasting, rust removing and coating are carried out after the integral latch-type steel beam is qualified. And protecting finished products in the later period.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. A manufacturing method of a latch type steel box girder is characterized in that: the method comprises the following steps:
step 1: BIM modeling:
building a BIM model by adopting Tekla Structure software, carrying out equal-proportion expansion lofting on a curve and/or a straight line of the bolt-shaped beam to ensure that the reached model of the part is consistent with an actual beam section, and exporting NC file data for preparing numerical control blanking;
step 2: precision blanking of plates:
unfolding curved surface (or linear) parts through BIM software, outputting the curved surface (or linear) parts together with other parts as NC files, introducing the NC files into intelligent typesetting jacking software for material optimization typesetting, then directly introducing data into a high-precision numerical control plasma or flame cutting machine for plate blanking, and obtaining the parts with unfolded patterns or irregular parts, wherein the parts mainly comprise a top plate, a latch plate, a web plate, a bottom plate, longitudinal ribs of the bottom plate, a vertical stiffening plate, a transverse clapboard in a box and an end supporting plate;
and step 3: manufacturing a plate unit:
301. manufacturing a rail wing plate unit: after the parts are fed, the bottom plate and the bottom plate stiffening plate are assembled, the bottom plate stiffening plate end is taken as a control point to assemble the bottom plate continuous stiffening plate, and after welding is finished, fine flame adjustment or mechanical correction is carried out according to the linear type to form a curved or linear track bottom plate unit;
302. manufacturing a web plate unit: the steel beam web and the stiffening ribs are firstly assembled and welded, then are assembled and welded with the track bottom plate unit, fine adjustment is carried out according to the line type, the vertical perpendicularity of the track bottom plate and the web is strictly controlled, and finally a curved surface or linear web unit is formed;
and 4, step 4: manufacturing a jig frame:
firstly, carrying out ground sample lofting, carrying out parallel projection on the appearance of the bolt-shaped steel beam and the ground, carrying out integral assembly by adopting a flip-chip method according to the structural characteristics of the bolt-shaped steel beam, in order to ensure the integral line type and precision of the bolt-shaped beam, when the jig frame is manufactured, arranging control point parameters on the jig frame, leading out all the control points by BIM model data, welding the jig frame by upright posts, cross beams, longitudinal beams and other section steel, arranging a fine adjustment screw rod at the top end of the jig frame, accurately controlling the height parameters of the jig frame surface by the fine adjustment screw rod, wherein the horizontal height is +/-0.5 mm from the standard value
And 5: assembling the bolt-type steel beams:
501. laying and fixing the top plate: the top plate is flatly laid on the jig frame, the position of the top plate unit is adjusted by taking the ground sample line as a reference, the top plate unit is tightly attached to the jig frame, and meanwhile, the periphery of the top plate unit is fixed by using the code plates so as to prevent the top plate from moving in a staggering manner in the total splicing process;
502. assembling the partition boards: assembling the transverse partition plates on the top plate unit, assembling the transverse partition plates according to the position lines of the partition plates marked on the top plate during assembling, and controlling the vertical verticality of the partition plates by using a plumb in the assembling process, wherein the verticality deviation is +/-1.5 mm, and the partition plate position precision deviation is +/-1.5 mm;
503. assembling a web: after the transverse partition plate is assembled, the web plate units are lifted to corresponding positions, the web plate panels are closely attached to the edges of the transverse partition plates in each box by adopting edge top constant pressure, the assembling verticality of the web plate is less than 3mm, and the web plate, the partition plates and the bottom plate are fixed in a spot welding mode after the assembly is qualified;
504. assembling a latch plate: after web plate assembly and internal welding are completed, hoisting the latch plate unit to a corresponding position, pressurizing the latch plate unit to enable the latch plate unit to be closely attached to the edge of the partition plate, checking the distance of the web plate, and fixing the latch plate, the web plate and the partition plate in a spot welding mode after the deviation is +/-1 mm;
505. welding the bolt-shaped steel beam: after the bolt-shaped beam is assembled and molded, welding an internal welding seam;
506. assembling a bolt type steel beam end supporting plate: after the welding of the bolt-shaped beam is completed and the geometric dimension is finely adjusted, the support plates are assembled according to the serial numbers in sequence, the support plates are positioned in vacant positions, holes at two ends are used as the center, the distance deviation is +/-2 mm, after the bolt-shaped beam is inspected to be qualified, the support plates are fixed with the top plate and the bottom plate in a spot welding mode, the welding of the support plates is completed, and finally the bolt-shaped steel beam end sealing plate is assembled.
2. A latch type steel box girder and a manufacturing method thereof according to claim 1, wherein: in step 505, welding is performed according to the following welding sequence: 1) firstly welding an inner welding seam, and then welding an outer welding seam; 2) firstly, adopting intermittent welding for positioning, and then carrying out full welding; 3) symmetrically welding; 4) welding short welding seams first and then welding long welding seams; 5) firstly, welding parts with smaller deformation influenced by welding, and then welding the welding seams with larger deformation; in order to ensure the dimensional accuracy of the box openings at the two ends, the support can be added and fixed at the box openings before welding.
3. A latch type steel box girder and a manufacturing method thereof according to claim 1, wherein: the curvature or straightness of the curve or straight line track bottom plate unit is less than 3 mm.
4. A latch type steel box girder and a manufacturing method thereof according to claim 1, wherein: the curvature or the straightness of the curved surface or the straight line web plate unit is less than 3 mm.
5. A latch type steel box girder and a manufacturing method thereof according to claim 1, wherein: the perpendicularity between the web plate and the bottom plate is +/-1 mm.
6. A latch type steel box girder and a manufacturing method thereof according to claim 1, wherein: the dimensional tolerance of the parts is +/-1 mm.
7. A bolt type steel box girder is characterized in that: including roof, bolt board, web, bottom plate indulge rib, vertical stiffening rib, incasement cross slab and end backup pad, the roof lower extreme sets up the incasement cross slab, the web is two, sets up respectively the both sides of incasement cross slab, just the upper and lower both ends of web respectively with the roof with the bottom plate links to each other, the bolt board sets up between two webs, and is in incasement cross slab below, the end backup pad is fixed with roof, bottom plate spot welding, the bottom plate is indulged the rib and is installed the bottom plate below, vertical stiffening rib sets up to two, and welds with two webs respectively.
8. A latch type steel box girder according to claim 7, wherein: the web plate is closely attached to the edge of the transverse partition plate in the box.
9. A latch type steel box girder according to claim 7, wherein: the latch plate is closely attached to the edge of the transverse partition plate in the box.
10. A latch type steel box girder according to claim 7, wherein: the number of the transverse partition plates in the box is 3.
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| CN202110176854.5A CN112942053A (en) | 2021-02-07 | 2021-02-07 | Bolt type steel box girder and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114700642A (en) * | 2021-11-30 | 2022-07-05 | 甘肃博睿交通重型装备制造有限公司 | Bridge steel box girder production system and bridge steel box girder production method |
| CN115008053A (en) * | 2022-06-07 | 2022-09-06 | 中国五冶集团有限公司 | Machining and manufacturing method for curved variable-section steel box girder |
-
2021
- 2021-02-07 CN CN202110176854.5A patent/CN112942053A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114700642A (en) * | 2021-11-30 | 2022-07-05 | 甘肃博睿交通重型装备制造有限公司 | Bridge steel box girder production system and bridge steel box girder production method |
| CN115008053A (en) * | 2022-06-07 | 2022-09-06 | 中国五冶集团有限公司 | Machining and manufacturing method for curved variable-section steel box girder |
| CN115008053B (en) * | 2022-06-07 | 2024-04-05 | 中国五冶集团有限公司 | Method for processing and manufacturing curve variable-section steel box girder |
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