CN108071076B - Welding process method for truss bridge deck slab - Google Patents
Welding process method for truss bridge deck slab Download PDFInfo
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- CN108071076B CN108071076B CN201711200820.5A CN201711200820A CN108071076B CN 108071076 B CN108071076 B CN 108071076B CN 201711200820 A CN201711200820 A CN 201711200820A CN 108071076 B CN108071076 B CN 108071076B
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The embodiment of the invention provides a welding process method of a truss bridge deck slab, which is used for providing a welding sequence of the truss bridge deck slab, providing a welding construction technical guidance of the welding sequence for an actual manufacturing process, and effectively improving the integral welding precision of a truss bridge and the stability of the manufactured truss bridge. The method comprises the following steps: dividing the tiled bridge deck plate units into N groups, wherein each group of bridge deck plate units comprises M bridge deck plate units; welding M bridge deck plate units in each group of bridge deck plate units together to form a bridge deck middle unit, and obtaining N bridge deck middle units in total; welding the N bridge deck middle units together to form a bridge deck; welding a butt weld between the bridge deck and a first girder on the first side and welding a butt weld between the bridge deck and a second girder on the second side; and welding a butt-joint welding seam between the bridge deck and the first cross beam on the third side and welding a butt-joint welding seam between the bridge deck and the second cross beam on the fourth side.
Description
Technical Field
The invention relates to the technical field of steel structure bridge manufacturing, in particular to a welding process method for a truss bridge deck plate.
Background
In the manufacturing process of the large-scale truss bridge with the large span and the wide section, the bridge deck is divided into a plurality of sections longitudinally and transversely, all the sections are required to be assembled together for welding, and the welding process is the key for controlling the manufacturing of the full bridge. In the prior art, theoretical calculation research on welding deformation and welding stress of a welding seam is more, but the conventional theoretical model only carries out simple classification according to the joint type of the welding seam, and each type corresponds to the welding deformation and the welding stress. In the actual manufacturing process, once a concrete steel bridge structure, special working conditions and structural forms are involved, specific welding construction technical guidance cannot be determined from the existing welding model, the overall welding precision of the truss bridge cannot be effectively controlled, and the stability of the manufactured truss bridge cannot be guaranteed.
Disclosure of Invention
The embodiment of the invention provides a welding process method of a truss bridge deck slab, which is used for providing a welding sequence of the truss bridge deck slab, providing a welding construction technical guidance of the welding sequence for an actual manufacturing process, and effectively improving the integral welding precision of a truss bridge and the stability of the manufactured truss bridge.
The welding process method for the truss bridge deck slab provided by the embodiment of the invention comprises the following steps:
dividing the tiled bridge deck plate units into N groups, wherein each group of bridge deck plate units comprises M bridge deck plate units;
welding M bridge deck plate units in each group of bridge deck plate units together to form a bridge deck middle unit, and obtaining N bridge deck middle units in total;
welding the N bridge deck middle units together to form a bridge deck;
welding a butt weld between the bridge deck and a first girder on a first side and welding a butt weld between the bridge deck and a second girder on a second side, the first side being opposite to the second side;
and welding a butt weld between the bridge deck and a first cross beam on a third side and a butt weld between the bridge deck and a second cross beam on a fourth side, wherein the third side is opposite to the fourth side.
Optionally, before the dividing the tiled bridge deck panel units into N groups, the method further comprises:
bolting the deck plate unit to the first girder, the second girder, and the first beam to the second beam;
and primarily screwing the high-strength bolts among the bridge deck plate unit, the first truss girder, the second truss girder, the first cross beam and the second cross beam.
Optionally, after the welding the butt-weld between the bridge deck and the first beam of the third side and the butt-weld between the bridge deck and the second beam of the fourth side, the method further comprises:
and finally screwing the high-strength bolts among the bridge deck plate unit, the first truss girder, the second truss girder, the first cross beam and the second cross beam.
Optionally, after the high-strength bolts between the bridge deck plate unit and the first girder, the second girder, and the first cross beam and the second cross beam are finally screwed, the method further includes:
and filling and covering the welding seams among the bridge deck plate units in the N bridge deck plate middle units.
Optionally, the method includes:
welding the M bridge deck plate units in each group together in a symmetrical and synchronous welding mode; and/or
Welding the N bridge deck middle units together in a symmetrical synchronous welding mode; and/or
Welding a butt-joint welding seam between the bridge deck and a first girder on the first side and welding a butt-joint welding seam between the bridge deck and a second girder on the second side in a symmetrical and synchronous welding mode; and/or
And welding a butt-joint welding seam between the bridge deck and the first cross beam on the third side and welding a butt-joint welding seam between the bridge deck and the second cross beam on the fourth side in a symmetrical and synchronous welding mode.
Optionally, the method further includes:
when the symmetrical synchronous welding mode is adopted for welding, solid welding wires are adopted for welding.
Optionally, the method further includes:
when the symmetrical synchronous welding mode is adopted for welding, carbon dioxide is adopted as protective gas.
Optionally, after the filling and facing of the weld joints between the bridge deck plate units in the N bridge deck plate intermediate units, the method further includes:
carrying out ultrasonic detection on the residual stress of four welding lines on the periphery of the bridge deck;
and performing stress relief treatment on the welding line with the residual stress larger than a first preset threshold value.
Optionally, after the welding the butt-weld between the bridge deck and the first beam of the third side and the butt-weld between the bridge deck and the second beam of the fourth side, the method further comprises:
detecting the actual deformation amount of each welding line;
and updating the theoretical deformation range of the welding line corresponding to the model based on the actual deformation.
One or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:
according to the technical scheme of the embodiment of the invention, the bridge deck plate units are divided into a plurality of groups, then the bridge deck plate units of each group are respectively welded together to form a bridge deck middle unit, and then the middle units are welded together to form a bridge deck; and finally, welding the butt weld between the bridge deck and the first cross beam on the third side and welding the butt weld between the bridge deck and the second cross beam on the fourth side. By formulating a reasonable welding sequence, welding construction technical guidance of the welding sequence is provided for the actual manufacturing process, and by adopting the welding sequence, the welding deformation quantity can be effectively controlled, and the integral welding precision of the truss bridge and the stability of the manufactured truss bridge are effectively improved.
Drawings
Fig. 1 is a flowchart of a welding process method for a truss bridge deck slab according to an embodiment of the present disclosure;
fig. 2 is a schematic view of a welding sequence in a welding process method of a truss bridge deck slab according to an embodiment of the present application.
Detailed Description
The embodiment of the invention provides a welding process method of a truss bridge deck slab, which is used for providing a welding sequence of the truss bridge deck slab, providing a welding construction technical guidance of the welding sequence for an actual manufacturing process, and effectively improving the integral welding precision of a truss bridge and the stability of the manufactured truss bridge. The welding process method for the truss bridge deck slab provided by the embodiment of the invention comprises the following steps: dividing the tiled bridge deck plate units into N groups, wherein each group of bridge deck plates comprises M bridge deck plate units; welding the M bridge deck plate units in each group together to form a bridge deck plate middle unit, and obtaining N bridge deck plate middle units in total; welding the N bridge deck middle units together to form a bridge deck; welding a butt weld between the bridge deck and a first girder on a first side and welding a butt weld between the bridge deck and a second girder on a second side, the first side being opposite to the second side; and welding a butt weld between the bridge deck and a first cross beam on a third side and a butt weld between the bridge deck and a second cross beam on a fourth side, wherein the third side is opposite to the fourth side.
The technical solutions of the present invention are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present invention are described in detail in the technical solutions of the present application, and are not limited to the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Referring to fig. 1, the welding process of the truss bridge deck provided by the present invention includes the following steps:
s101: dividing the tiled bridge deck plate units into N groups, wherein each group of bridge deck plate units comprises M bridge deck plate units;
s102: welding M bridge deck plate units in each group of bridge deck plate units together to form a bridge deck middle unit, and obtaining N bridge deck middle units in total;
s103: welding the N bridge deck middle units together to form a bridge deck;
s104: welding a butt weld between the bridge deck and a first girder on a first side and welding a butt weld between the bridge deck and a second girder on a second side, the first side being opposite to the second side;
s105: and welding a butt weld between the bridge deck and a first cross beam on a third side and a butt weld between the bridge deck and a second cross beam on a fourth side, wherein the third side is opposite to the fourth side.
Wherein prior to said dividing the tiled deck panel units into N groups, the method further comprises:
bolting the deck plate unit to the first girder, the second girder, and the first beam to the second beam;
and primarily screwing the high-strength bolts among the bridge deck plate unit, the first truss girder, the second truss girder, the first cross beam and the second cross beam.
After the welding the butt weld between the deck slab and the first beam of the third side and the butt weld between the deck slab and the second beam of the fourth side, the method further comprises:
finally screwing the high-strength bolts among the bridge deck plate unit, the first truss girder, the second truss girder and the first cross beam;
and filling and covering the welding seams among the bridge deck plate units in the N bridge deck plate middle units.
Wherein the method comprises the following steps: welding the M bridge deck plate units in each group together in a symmetrical and synchronous welding mode; and/or
Welding the N bridge deck middle units together in a symmetrical synchronous welding mode; and/or
Welding a butt-joint welding seam between the bridge deck and a first girder on the first side and welding a butt-joint welding seam between the bridge deck and a second girder on the second side in a symmetrical and synchronous welding mode; and/or
And welding a butt-joint welding seam between the bridge deck and the first cross beam on the third side and welding a butt-joint welding seam between the bridge deck and the second cross beam on the fourth side in a symmetrical and synchronous welding mode.
Specifically, in this embodiment, first, the truss bridge steel frame structure is hoisted, as shown in fig. 2, the bridge deck units are tiled at a set position, fig. 2 includes 9 bridge deck units, and 9 bridge deck units 1 to 9 are sequentially tiled together to form a bridge deck 201. A first girder 202 is suspended from a first side of the deck slab, and a second girder 203 is suspended from a second side opposite to the first side. Meanwhile, a first beam 204 is hung on the third side of the bridge deck, and a second beam 205 is hung on the fourth side opposite to the third side. After the hoisting is completed, bolting between the bridge deck plate unit in the bridge deck 201 and the first girder 202, the second girder 203, the first beam 204 and the second beam 205 is performed, specifically, bolting U ribs between the bridge deck plate unit in the bridge deck 201 and the first girder 202, the second girder 203, the first beam 204 and the second beam 205. Then, the high-strength bolts between the bridge deck plate unit and the first girder 202, the second girder 203, and the first beam 204 and the second beam 205 in the bridge deck plate unit are primarily screwed.
Further, after the hoisting and initial screwing steps are completed, a welding step is required.
Firstly, dividing the tiled bridge deck units into N groups, wherein each group of bridge deck comprises M bridge deck plate units. As shown in FIG. 2, the tiling has 9 bridge floor slab units 1 ~ 9, can divide into 3 sets of bridge floor slab units with it, and every bridge floor slab unit of group includes 3 bridge floor slab units, and first set of bridge floor slab unit includes bridge floor slab unit 1 ~ 3, and second set of bridge floor slab unit includes bridge floor slab unit 4 ~ 6, and third set of bridge floor slab unit includes bridge floor slab unit 7 ~ 9. In a specific implementation, the grouping manner may be determined according to the number of the bridge deck plate units, and the application is not limited herein.
And then, welding seams between the bridge deck plate units 1 and 2 and welding seams between the bridge deck plate units 2 and 3 in the first group are welded in a symmetrical synchronous welding mode, and further a first bridge deck middle unit is formed. Meanwhile, welding seams between the bridge deck plate units 4 and the bridge deck plate units 5 in the second group and welding seams between the bridge deck plate units 5 and the bridge deck plate units 6 are welded in a symmetrical and synchronous welding mode, and then a second bridge deck plate middle unit is formed. Meanwhile, welding seams between the third group of middle bridge deck plate units 7 and 8 and between the third group of middle bridge deck plate units 8 and 9 are welded in a symmetrical and synchronous welding mode, and then a third bridge deck plate middle unit is formed. Three bridge deck middle units are formed in total by the first bridge deck middle unit, the second bridge deck middle unit and the third bridge deck middle unit.
That is, the weld between the deck plate unit 1 and the deck plate unit 2, the weld between the deck plate unit 2 and the deck plate unit 3, the weld between the deck plate unit 4 and the deck plate unit 5, the weld between the deck plate unit 5 and the deck plate unit 6, the weld between the deck plate unit 7 and the deck plate unit 8, and the weld between the deck plate unit 8 and the deck plate unit 9 are welded at the same time, and the welding sequence is shown as ① in fig. 2.
After welding, welding seams between the first bridge deck middle unit and the second bridge deck middle unit and welding seams between the second bridge deck middle unit and the third bridge deck middle unit are welded in a synchronous welding mode, the welding seams between the first bridge deck middle unit and the second bridge deck middle unit are welding seams between the bridge deck plate unit 3 and the bridge deck plate unit 4, the welding seams between the second bridge deck middle unit and the third bridge deck middle unit are welding seams between the bridge deck plate unit 6 and the bridge deck plate unit 7, namely, the welding seams between the bridge deck plate unit 3 and the bridge deck plate unit 4 and the welding seams between the bridge deck plate unit 6 and the bridge deck plate unit 7 are welded at the same time, the welding sequence is shown as ② in figure 2, and after welding is completed, the welding of the bridge deck 201 is completed.
Further, the butt welds between the deck slab 201 and the first girder 202 and between the deck slab 201 and the second girder 203 are welded in a symmetrical and simultaneous welding manner, that is, the butt welds between the deck slab 201 and the first girder 202 and between the deck slab 201 and the second girder 203 are welded at the same time, and the welding sequence is shown as ③ in fig. 2.
Finally, the butt weld between the bridge deck 201 and the first beam 204 is welded by adopting a symmetrical synchronous welding mode, as shown in FIG. 2, the butt weld between the bridge deck 201 and the first beam 204 is longer, and the butt weld starts to be welded from the middle point to the two ends along the axial direction of the first beam 204 from the middle point, and the welding sequence is shown as ④ in FIG. 2.
In this embodiment, the bridge deck 201 has many butt welds between the girders and the beams, and is relatively dense, and a symmetrical and synchronous welding manner is adopted, so that the welding deformation can be effectively reduced, and the welding precision can be ensured within a controllable range.
Further, in this embodiment, after the welding is completed according to the sequence ①②③④⑤ in fig. 2, the high-strength bolts between the deck plate units and the first girder 202, the second girder 203, and the first beam 204 and the second beam 205 in the deck plate 201 are finally screwed, and the welding seams between the deck plate units 1 to 9 are filled and covered.
Further, in this embodiment, when the symmetric synchronous welding method is adopted for welding, a solid wire is adopted for welding. Carbon dioxide is also used as a shielding gas.
Specifically, in the present embodiment, by analyzing the shrinkage of the single butt weld layer by layer, it is found that, in the process of filling the weld, the welding deformation is mainly concentrated on the first layer and the second layer of the weld, which account for more than 80% of the total deformation of the weld, and therefore, in the present embodiment, the solid welding wire carbon dioxide gas shielded welding with small linear energy is adopted, and the welding cost and the welding deformation can be effectively controlled.
Further, in this embodiment, in order to ensure the stability of the truss bridge in the later operation, the ultrasonic detection is performed on the residual stress of four welding seams around the bridge deck; and performing stress relief treatment on the welding line with the residual stress larger than a first preset threshold value.
Specifically, in this embodiment, after the welding process is completed, the residual stress of the weld joints around the bridge deck 201 needs to be detected by ultrasonic waves, and then the weld joints with the residual stress greater than the first preset threshold value need to be eliminated. When the stress relief treatment is carried out, the residual stress can be relieved by adopting a heating mode, and heating modes such as flame, infrared, resistance, induction and the like can be adopted, so that uniform heating is kept and a certain heating width is kept. Of course, mechanical stretching, hydrostatic testing, temperature differential stretching, vibration methods, etc. may also be performed to eliminate residual stress. When the residual stress is eliminated by adopting a vibration method, vibration equipment is arranged on a corresponding structure, vibration treatment is carried out for several minutes to tens of minutes under the natural frequency, additional stress is applied to the structure needing to be eliminated in a vibration mode, and when the additional stress and the residual stress are superposed and reach or exceed the yield limit of a material, the structure is subjected to micro or macro plastic deformation, so that the residual stress in a workpiece is reduced and homogenized, and the dimensional precision is stabilized. The vibration method has the characteristics of low energy consumption, short time, obvious effect and the like. In a specific implementation process, the mode of the response eliminating treatment may be set according to actual needs, and the application is not limited herein.
Further, in this embodiment, a model corresponding to the truss bridge welding process needs to be established, and the range of deformation amount corresponding to each welding seam is recorded in the model for the constructor to use as a reference when performing the welding process. After the actual welding process of the truss bridge is carried out each time, the deformation ranges corresponding to the welding seams in the model are updated. During updating, if the deviation between the actual deformation amount of the welding seam and the value in the theoretical deformation amount range in the model is large, the theoretical deformation amount of the welding seam corresponding to the model is corrected. Such as: the actual deformation amount corresponding to the butt weld between the bridge deck 201 and the first girder 202 is 2mm, and the theoretical deformation amount corresponding to the butt weld between the bridge deck 201 and the first girder 202 in the model is 3mm to 5 mm. At this time, the theoretical deformation range corresponding to the butt weld between the bridge deck 201 and the first truss 202 in the model needs to be updated to 2 mm-5 mm, so that the model is more suitable for the actual production condition and has more guiding significance.
According to the technical scheme of the embodiment of the invention, the bridge deck plate units are divided into a plurality of groups, then the bridge deck plate units of each group are respectively welded together to form a bridge deck middle unit, and then the middle units are welded together to form a bridge deck; and finally, welding the butt weld between the bridge deck and the first cross beam on the third side and welding the butt weld between the bridge deck and the second cross beam on the fourth side. By formulating a reasonable welding sequence, welding construction technical guidance of the welding sequence is provided for the actual manufacturing process, and by adopting the welding sequence, the welding deformation quantity can be effectively controlled, and the integral welding precision of the truss bridge and the stability of the manufactured truss bridge are effectively improved.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A welding process method for a truss bridge deck slab is characterized by comprising the following steps:
dividing the tiled bridge deck plate units into N groups, wherein each group of bridge deck plate units comprises M bridge deck plate units;
welding M bridge deck plate units in each group of bridge deck plate units together by adopting a symmetrical synchronous welding mode to form a bridge deck middle unit, and obtaining N bridge deck middle units in total;
welding the N bridge deck middle units together in a symmetrical and synchronous welding mode to form a bridge deck;
welding a butt weld between the bridge deck and a first girder on a first side and welding a butt weld between the bridge deck and a second girder on a second side by adopting a symmetrical synchronous welding mode, wherein the first side is opposite to the second side;
welding a butt-joint welding seam between the bridge deck and a first cross beam on a third side and welding a butt-joint welding seam between the bridge deck and a second cross beam on a fourth side in a symmetrical and synchronous welding mode, wherein the third side is opposite to the fourth side;
detecting the actual deformation amount of each welding line;
and updating the theoretical deformation range of the welding line corresponding to the model based on the actual deformation.
2. The method of claim 1, wherein prior to said dividing the tiled bridge deck panel units into N groups, the method further comprises:
bolting the deck plate unit to the first girder, the second girder, and the first beam to the second beam;
and primarily screwing the high-strength bolts among the bridge deck plate unit, the first truss girder, the second truss girder, the first cross beam and the second cross beam.
3. The method of claim 1, wherein after the welding the butt weld between the bridge deck and the first beam of the third side and the butt weld between the bridge deck and the second beam of the fourth side, the method further comprises:
and finally screwing the high-strength bolts among the bridge deck plate unit, the first truss girder, the second truss girder, the first cross beam and the second cross beam.
4. The method of claim 3, wherein after said terminating said high tension bolts between said deck panel unit and said first and second girders and said first and second beams, said method further comprises:
and filling and covering the welding seams among the bridge deck plate units in the N bridge deck plate middle units.
5. The method of claim 1, wherein the method further comprises:
when the symmetrical synchronous welding mode is adopted for welding, solid welding wires are adopted for welding.
6. The method of claim 1, wherein the method further comprises:
when the symmetrical synchronous welding mode is adopted for welding, carbon dioxide is adopted as protective gas.
7. The method of claim 4, wherein after said filling and facing the welds between the bridge deck plate units in said N bridge deck intermediate units, the method further comprises:
carrying out ultrasonic detection on the residual stress of four welding lines on the periphery of the bridge deck;
and performing stress relief treatment on the welding line with the residual stress larger than a first preset threshold value.
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| CN201711200820.5A CN108071076B (en) | 2017-11-27 | 2017-11-27 | Welding process method for truss bridge deck slab |
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| CN114131250B (en) * | 2021-11-23 | 2023-06-06 | 中铁九桥工程有限公司 | Manufacturing method of orthotropic bridge deck |
| CN114214957B (en) * | 2021-12-30 | 2024-03-22 | 武船重型工程股份有限公司 | Construction method of double-layer truss bridge |
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| JP2006231340A (en) * | 2005-02-22 | 2006-09-07 | Ishikawajima Harima Heavy Ind Co Ltd | Joining structure and joining method |
| CN105735129B (en) * | 2016-02-26 | 2017-05-10 | 江苏中铁山桥重工有限公司 | Full-welding truss section modularized splicing method |
| CN106270930A (en) * | 2016-10-19 | 2017-01-04 | 武船重型工程股份有限公司 | Two-side synchronous welding method inside and outside a kind of U rib |
| CN106392274B (en) * | 2016-12-06 | 2019-05-03 | 武汉天高熔接股份有限公司 | FGB method submerged arc single face welding and double face shaping welding procedure |
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