CN109972533B - Pushing device for closure of steel truss bridge - Google Patents
Pushing device for closure of steel truss bridge Download PDFInfo
- Publication number
- CN109972533B CN109972533B CN201910334380.5A CN201910334380A CN109972533B CN 109972533 B CN109972533 B CN 109972533B CN 201910334380 A CN201910334380 A CN 201910334380A CN 109972533 B CN109972533 B CN 109972533B
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- Prior art keywords
- closure
- steel truss
- clamping
- pushing
- truss bridge
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 27
- 239000010959 steel Substances 0.000 title claims abstract description 27
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 9
- 230000002411 adverse Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 5
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 206010016256 fatigue Diseases 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a pushing device for closure of a steel truss bridge, which comprises two counterforce seat components and pushing drive propped between the two counterforce seat components, wherein the counterforce seat components comprise two clamping seats which are connected with each other, and a clamping surface is arranged between the two clamping seats. According to the invention, the pushing force of pushing driving is resisted by generating friction counterforce between the clamping seat and the upper chord member, so that the longitudinal deviation of the upper chord members at the two sides of the closure opening is regulated, closure is assisted, and the counterforce seat component of the pushing device has the advantages of simple structure, convenience in installation, easiness in disassembly and reutilization, overcomes a plurality of adverse effects of the traditional welding counterforce seat on the steel girder, and reduces the damage of welding operation on the steel truss.
Description
Technical Field
The invention relates to the field of bridge construction, in particular to a pushing device for closure of a steel truss girder bridge.
Background
The large-span steel truss bridge is used as a common bridge for crossing rivers and canyons, cantilever assembly construction technology is mostly adopted in the construction process, and assembly of lower chords at two sides of a portal of the steel truss is generally realized by lowering the height of a main pier or jacking the height of the steel truss at the position of the main pier during crossing closure. As shown in fig. 1, it may be necessary to apply a jacking force (F) between the upper chords 9 on both sides at the closure mouth 8 in assembling the upper chords and diagonal members to complete the closure assembly of the upper chords 9 and web members (not shown in fig. 1). It is now common practice to weld the top force reaction seats directly to the upper chords 9 on either side of the closure orifice 8. Firstly, high-altitude welding is inconvenient, welding quality is not well controlled, secondly, the damage to the steel truss girder rod pieces can be caused at the welding position, the risk of fatigue damage of components is increased, and adverse effects are caused on the structural safety of the steel truss girder bridge.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing the pushing device for closure of the steel truss bridge, which balances the pushing force by using friction force, is simple to install and convenient to detach and has less damage to the structure of the steel truss bridge.
In order to solve the technical problems, the invention adopts the following technical scheme:
the pushing device for closure of the steel truss bridge comprises two counterforce seat components and pushing driving supported between the two counterforce seat components, wherein the counterforce seat components comprise two clamping seats which are connected with each other, and a clamping surface is arranged between the two clamping seats.
As a further improvement of the technical scheme, two groups of pushing drives are arranged, and each group of pushing drives is propped against two corresponding clamping seats.
As a further improvement of the technical scheme, the clamping seat comprises a clamping plate and bearing plates fixedly connected with the clamping plate, the clamping surface is positioned on the clamping plate, and the pushing component is propped against the two corresponding bearing plates.
As a further improvement of the above technical solution, the two clamping plates are connected by a screw.
As a further improvement of the technical scheme, the screw is a double-headed screw, both ends of the double-headed screw are respectively penetrated on the two clamping plates and are respectively locked by nuts, and gaskets are arranged on the inner sides of the nuts.
As a further improvement of the technical scheme, the pushing drive comprises a top beam and jacks positioned at two ends of the top beam.
As a further improvement of the technical scheme, the two ends of the top beam are provided with the first limiting grooves, each bearing plate is provided with the second limiting groove, one end of the jack is positioned in the first limiting groove, and the other end of the jack is positioned in the second limiting groove.
As a further improvement of the technical scheme, the top beam bearing plates are arranged at the two ends of the top beam, and the first limiting grooves are formed in the top beam bearing plates.
As a further improvement of the technical scheme, the bearing plate is provided with a jack supporting frame, and the second limiting groove is positioned in the jack supporting frame.
As a further improvement of the technical scheme, an auxiliary reinforcing plate is arranged on the clamping plate at the rear side of the bearing plate, and a plurality of reinforcing rib plates are arranged between the auxiliary reinforcing plate and the bearing plate.
Compared with the prior art, the invention has the advantages that:
according to the pushing device for closure of the steel truss bridge, the counterforce seat is clamped on the upper chord member through the two clamping seats, and the friction counterforce is generated between the clamping seats and the upper chord member to resist the pushing driving jacking force, so that the longitudinal deviation of the upper chord member at the two sides of the closure opening is regulated, the closure is assisted, the counterforce seat component of the pushing device is simple in structure, convenient to install and easy to detach, can be reused, various adverse effects of the traditional welding counterforce seat on the steel girder are overcome, the damage of welding operation on the steel truss is reduced, and the whole pushing device is mechanically connected, can rapidly complete the dismounting and pushing operation, and improves the work efficiency.
Drawings
Fig. 1 is a schematic diagram of the stresses at the closure of a steel girder bridge.
Fig. 2 is a schematic view of an exploded construction of the thrustor of the present invention for closure of a steel girder bridge.
Fig. 3 is a schematic diagram of the connection relationship between the reaction seat and the upper chord (angle one) in the present invention.
Fig. 4 is a schematic diagram of the connection relationship between the reaction seat and the upper chord (angle two) in the present invention.
Fig. 5 is a schematic structural view (angle one) of the reaction force seat in the present invention.
Fig. 6 is a schematic structural view (angle two) of the reaction force seat in the present invention.
Fig. 7 is a schematic view of the structure of the header according to the present invention.
The reference numerals in the drawings denote:
1. a clamping seat; 101. a clamping surface; 102. a screw hole; 11. a clamping plate; 12. a force bearing plate; 13. an auxiliary reinforcing plate; 14. reinforcing rib plates; 2. a screw; 21. a nut; 22. a gasket; 3. a jack support frame; 31. the second limit groove; 4. a top beam; 41. a first limit groove; 42. roof beam load bearing plate; 5. a jack; 6. closing a closure opening; 7. an upper chord.
Detailed Description
The invention is described in further detail below with reference to the drawings and specific examples of the specification.
As shown in fig. 2 to 7, the pushing device for closure of a steel truss bridge of the present embodiment includes two reaction seat assemblies and a pushing drive pushing between the two reaction seat assemblies, the reaction seat assemblies include two clamping seats 1 connected to each other, and a clamping surface 101 is provided between the two clamping seats 1.
The two clamping seats 1 are clamped on the upper chords 7 at the two sides of the closure opening 6 through the two clamping surfaces 101, the pushing devices are pushed on the clamping seats 1 at the two sides of the closure opening 6, and friction counter force is generated between the clamping surfaces 101 and the upper chords 7 to resist pushing force for pushing driving, so that the longitudinal deviation of the upper chords 7 at the two sides of the closure opening 6 is adjusted, and the closure is assisted. The counterforce seat assembly of the pushing device is simple in structure, convenient to install, easy to detach, capable of being reused and high in construction speed, overcomes the adverse effects of the traditional welding counterforce seat on the steel girder, and reduces the damage of welding operation on the steel truss.
In this embodiment, the clamping seat 1 includes a clamping plate 11 and a bearing plate 12 fixedly connected with the clamping plate 11, the clamping surface 101 is located on the clamping plate 11, and the two clamping plates 11 are connected through four screws 2. Wherein two screws 2 are located above the upper chord 7 and two screws 2 are located below the upper chord 7. Specifically, the screw 2 is a double-headed screw, both ends of the double-headed screw are respectively arranged in screw holes 102 on the two clamping plates 11 in a penetrating manner, and are respectively locked by nuts 21, and gaskets 22 are arranged on the inner sides of the nuts 21. In addition to the present embodiment, the screw 2 may be a single-head screw, one end of which has a nut and the other end of which is provided with a nut 21; the number of screws 2 is not limited either.
In this embodiment, two sets of pushing drives are provided, and each set of pushing drive is propped against two corresponding clamping seats 1, as shown in fig. 2. The two ends of the top beam 4 are provided with top beam bearing plates 42, the top beam bearing plates 42 are provided with first limit grooves 41, each bearing plate 12 is provided with a jack support frame 3, the jack support frame 3 is provided with a second limit groove 31, one end of each jack 5 is positioned in the first limit groove 41, and the other end is positioned in the second limit groove 31. By arranging the jack support frame 3, the jack 5 is prevented from being separated in the pushing process, and meanwhile, limit grooves of the jack 5 are arranged on the top beam bearing plate 42 and the jack support frame 3, so that the jack is prevented from being deviated in the pushing process. In this embodiment, the top of the jack 5 is preferably at the end of the top beam 4 and the bottom is preferably at the end of the holder 1. In this embodiment, the pushing drives are two groups, and except for this embodiment, a group of pushing drives may be provided, and a group of pushing drives may be provided on two clamping bases 1 on the same side of the upper chord 7, or two pushing portions may be provided at two ends of a group of pushing drives, so that four pushing portions may contact with four clamping bases 1, and of course, the pushing drives may also be provided with more than two groups.
In this embodiment, an auxiliary reinforcing plate 13 is disposed on the clamping plate 11 at the rear side of the bearing plate 12, and a plurality of reinforcing rib plates 14 are disposed between the auxiliary reinforcing plate 13 and the bearing plate 12. The strength of the clamping seat 1 is increased by the auxiliary reinforcing plate 13 and the reinforcing rib plate 14.
While the invention has been described with reference to preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.
Claims (5)
1. A thrustor for steel truss bridge closure, its characterized in that: including two counter-force seat components and top push drive between two counter-force seat components, counter-force seat components includes two interconnect's grip slipper (1), is equipped with clamping face (101) between two grip slipper (1), push drive sets up two sets of, and every group pushes away the drive top on two grip slipper (1) that correspond, grip slipper (1) include splint (11) and with splint (11) fixed connection's load-bearing plate (12), clamping face (101) are located splint (11), push away the drive top on two corresponding load-bearing plates (12), two splint (11) are connected through screw rod (2), push away the drive and include back timber (4) and be located jack (5) at back timber (4) both ends, back timber (4) both ends are equipped with first spacing groove (41), each load-bearing plate (12) are equipped with second spacing groove (31), jack one end is located first spacing groove (41), and the other end is located second spacing groove (31).
2. The thrustor for closure of a steel truss bridge of claim 1, wherein: the screw rod (2) is a double-end screw rod, two ends of the double-end screw rod are respectively arranged on the two clamping plates (11) in a penetrating mode and are locked through nuts (21), and gaskets (22) are arranged on the inner sides of the nuts (21).
3. The thrustor for closure of a steel truss bridge according to any one of claims 1 to 2, wherein: the two ends of the top beam (4) are provided with top beam bearing plates (42), and the first limiting grooves (41) are formed in the top beam bearing plates (42).
4. The thrustor for closure of a steel truss bridge according to any one of claims 1 to 2, wherein: the bearing plate (12) is provided with a jack support frame (3), and the second limit groove (31) is positioned in the jack support frame (3).
5. The thrustor for closure of a steel truss bridge according to any one of claims 1 to 2, wherein: an auxiliary reinforcing plate (13) is arranged on the clamping plate (11) at the rear side of the bearing plate (12), and a plurality of reinforcing rib plates (14) are arranged between the auxiliary reinforcing plate (13) and the bearing plate (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910334380.5A CN109972533B (en) | 2019-04-24 | 2019-04-24 | Pushing device for closure of steel truss bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910334380.5A CN109972533B (en) | 2019-04-24 | 2019-04-24 | Pushing device for closure of steel truss bridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109972533A CN109972533A (en) | 2019-07-05 |
| CN109972533B true CN109972533B (en) | 2024-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910334380.5A Active CN109972533B (en) | 2019-04-24 | 2019-04-24 | Pushing device for closure of steel truss bridge |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110512521B (en) * | 2019-07-30 | 2021-06-29 | 中铁大桥局集团有限公司 | Butt joint device and butt joint method for large-section steel truss girder |
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|---|---|---|---|---|
| WO2011005009A2 (en) * | 2009-07-07 | 2011-01-13 | 주식회사 삼현피에프 | Upper part structure for a continuous bridge, which efficiently supports negative moment and has improved constructability, and method for constructing same |
| CN105544410A (en) * | 2016-01-07 | 2016-05-04 | 中铁四局集团钢结构有限公司 | Joining method for rigid suspension cable stiffening chord in incremental launching method construction |
| CN205775892U (en) * | 2016-05-24 | 2016-12-07 | 西安公路研究院 | A kind of continuous rigid frame bridge closure segment pushing tow is with oblique pushing reaction frame |
| WO2017197987A1 (en) * | 2016-05-20 | 2017-11-23 | 东南大学 | Automatic tensioning system and method for reinforcing beam, plate and column by pre-stressed fibreboard |
| CN207244469U (en) * | 2017-07-28 | 2018-04-17 | 上海先达特种土木工程有限公司 | Beam body aids in thrustor |
| CN210288141U (en) * | 2019-04-24 | 2020-04-10 | 中铁十二局集团有限公司 | Pushing device for closure of steel truss girder bridge |
-
2019
- 2019-04-24 CN CN201910334380.5A patent/CN109972533B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011005009A2 (en) * | 2009-07-07 | 2011-01-13 | 주식회사 삼현피에프 | Upper part structure for a continuous bridge, which efficiently supports negative moment and has improved constructability, and method for constructing same |
| CN105544410A (en) * | 2016-01-07 | 2016-05-04 | 中铁四局集团钢结构有限公司 | Joining method for rigid suspension cable stiffening chord in incremental launching method construction |
| WO2017197987A1 (en) * | 2016-05-20 | 2017-11-23 | 东南大学 | Automatic tensioning system and method for reinforcing beam, plate and column by pre-stressed fibreboard |
| CN205775892U (en) * | 2016-05-24 | 2016-12-07 | 西安公路研究院 | A kind of continuous rigid frame bridge closure segment pushing tow is with oblique pushing reaction frame |
| CN207244469U (en) * | 2017-07-28 | 2018-04-17 | 上海先达特种土木工程有限公司 | Beam body aids in thrustor |
| CN210288141U (en) * | 2019-04-24 | 2020-04-10 | 中铁十二局集团有限公司 | Pushing device for closure of steel truss girder bridge |
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| Publication number | Publication date |
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| CN109972533A (en) | 2019-07-05 |
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