CN212925727U - Cable-stayed bridge of steel truss stiffened concrete beam - Google Patents
Cable-stayed bridge of steel truss stiffened concrete beam Download PDFInfo
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- CN212925727U CN212925727U CN202020543462.9U CN202020543462U CN212925727U CN 212925727 U CN212925727 U CN 212925727U CN 202020543462 U CN202020543462 U CN 202020543462U CN 212925727 U CN212925727 U CN 212925727U
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Abstract
The utility model discloses a steel purlin concrete beam's cable-stay bridge of putting more energy into, including the girder that directly bears the bridge floor load, the girder erection just passes the pylon on the pier of limit, be provided with many pairs of suspension cable between pylon and the girder, the girder is assembled to form by a plurality of prefabricated segments in the same direction as the bridge. The prefabricated sections are composed of stiffening steel trusses and concrete beams, and the stiffening steel trusses and the concrete beams are spliced and fixed. And a stiffening steel truss node plate is arranged in the concrete beam and connected with a lower chord node of the stiffening steel truss. The utility model discloses the girder adopts the integrated configuration of stiffening steel purlin, concrete beam, and full play steel, concrete respective material performance advantage, structural rigidity is big and dynamic property is good, has effectively solved the difficult problem that the deformation is difficult to control that the longspan concrete girder creeps. The construction is carried out by adopting the prefabricated segment splicing method, so that the construction period is saved, the construction quality is improved, the creep in the later period is reduced, and the mechanized and standardized construction is realized.
Description
Technical Field
The utility model belongs to the bridge structures field, concretely relates to steel purlin reinforced concrete beam's cable-stay bridge.
Background
The cable-stayed bridge is gradually applied to a high-speed railway with the advantage of span, and the cable-stayed bridge needs to have higher overall rigidity in order to ensure that the train has higher safety, stability and passenger riding comfort under the condition of high-speed running.
At present, when a concrete main beam is adopted in a cable-stayed bridge, particularly a large-span cable-stayed bridge, the integral rigidity of the structure is high, but the spanning capability is poor, the creep deformation of a beam body is large, and the construction period is long in the construction process; when the steel girder is adopted, the integral rigidity of the structure is small, the adaptability of the ballastless track is poor, and the construction cost and the maintenance workload are large.
Disclosure of Invention
The utility model discloses a solve the problem that prior art exists and propose, its purpose provides a steel purlin concrete beam's cable-stay bridge of putting more energy into.
The technical scheme of the utility model is that: the utility model provides a steel purlin concrete beam's cable-stay bridge of putting more energy into, includes the girder that directly bears the bridge floor load, the girder erects on the side pier and passes the pylon, be provided with many pairs of suspension cable between pylon and the girder, the girder is assembled by a plurality of prefabricated segments in the same direction as the bridge and is formed.
Furthermore, the prefabricated sections are composed of stiffening steel trusses located above and concrete beams located below, and the stiffening steel trusses and the concrete beams are spliced and fixed.
Furthermore, a stiffening steel truss node plate is arranged in the concrete beam, and the stiffening steel truss node plate is connected with a lower chord node of the stiffening steel truss.
Furthermore, the lower part of the stiffening steel truss gusset plate is embedded in the concrete beam, the lower part of the stiffening steel truss gusset plate forms an assembly hole, steel bars in the concrete beam pass through the assembly hole, and a PBL shear key is formed between the stiffening steel truss gusset plate and the concrete beam and is fixed.
Furthermore, the upper part of the stiffening steel truss gusset plate extends out of the concrete beam, a bolt hole is formed in the upper part of the stiffening steel truss gusset plate, and the stiffening steel truss gusset plate and the stiffening steel truss are fixed through bolts screwed into the bolt hole.
Furthermore, a plurality of stiffening steel truss node plates are arranged in the concrete beam, and the stiffening steel truss node plates are connected with two sides of the stiffening steel truss.
Furthermore, a prestressed pipeline along the bridge direction is arranged in the concrete beam.
Furthermore, a splicing section shear key is arranged at the side end of the concrete beam, two adjacent prefabricated sections are connected through the splicing section shear key, and epoxy resin sealant for the bridge is smeared at the joint of the two adjacent prefabricated sections.
The concrete beam is a plate beam or a box beam.
The utility model has the advantages as follows:
the utility model discloses the girder adopts the integrated configuration of stiffening steel purlin, concrete beam, and full play steel, concrete respective material performance advantage have effectively solved the difficult problem that the deformation is difficult to control that the large-span concrete girder creeps.
The utility model discloses structural rigidity is big and the distribution is even, and dynamic property is good, is favorable to security, ride comfort and the comfort level that bridge floor driving such as railway, urban rail transit, highway especially high-speed railway driving.
The utility model discloses compare with the steel bridge, owing to the part adopts the concrete beam, with the reduction of steel volume and maintenance work volume, engineering cost reduces.
The utility model discloses compare with the concrete beam, optimize roof beam body cross-section, effectively reduced the roof beam height, building height is lower, and the dead weight is littleer.
The utility model discloses construction convenience, concrete beam can adapt to ballastless track's the requirement of laying.
The utility model discloses a construction period has been saved in the prefabricated assembly method construction of festival section, has improved construction quality, has reduced the later stage and has slowly become, realizes mechanized, standardized construction, and the work progress is also environmental protection more.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the connection of the support points when the concrete beam is a plate beam;
FIG. 3 is a schematic view of the connection of the support points when the concrete beam is a plate beam;
FIG. 4 is a schematic connection diagram of the concrete beam of the present invention as a plate beam;
FIG. 5 is a cross-sectional view of the supporting point of the concrete beam of the present invention;
FIG. 6 is a cross-sectional view of the midspan of the concrete beam of the present invention as a slab beam;
fig. 7 is a cross-sectional view of the concrete beam of the present invention as a box girder;
fig. 8 is a schematic structural diagram of a middle gusset plate of the present invention;
fig. 9 is a schematic view of the installation of the node plate of the present invention;
wherein:
1 lower foundation 2 bridge tower
3 stiffening steel truss 4 concrete beam
5 main beam 6 stayed cable
7 side pier 8 auxiliary pier
9 side pier 10 side span
11 midspan 12 prestressed pipe
13 splicing section shear key 14 assembling hole
15 stiffening steel truss gusset plate 16 bolt holes.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples:
as shown in fig. 1-9, a steel truss stiffened concrete beam's cable-stay bridge, includes the girder 5 that directly bears the bridge floor load, girder 5 erects on side pier 7 and passes pylon 2, be provided with many pairs of suspension cable 6 between pylon 2 and the girder 5, girder 5 is assembled to forming by a plurality of prefabricated segments along the bridge direction.
And a vertical support and a longitudinal damper for supporting the main beam 5 are arranged on the bridge tower 2.
The concrete beam 4 is a plate beam, as shown in fig. 2, 3, 5, and 6.
The prefabricated segment is composed of a stiffening steel truss 3 located above and a concrete beam 4 located below, and the stiffening steel truss 3 and the concrete beam 4 are assembled and fixed.
And a stiffening steel truss node plate 15 is arranged in the concrete beam 4, and the stiffening steel truss node plate 15 is connected with a lower chord node of the stiffening steel truss 3.
15 lower parts of stiffening steel truss gusset plates are pre-buried in concrete beam 4, 15 lower parts of stiffening steel truss gusset plates form assembly holes 14, reinforcing steel bars in concrete beam 4 pass through assembly holes 14, it is fixed to form PBL shear force key between 15, the concrete beam 4 of stiffening steel truss gusset plates.
The upper portion of stiffening steel truss gusset plate 15 stretches out concrete beam 4, the bolt hole 16 is formed on stiffening steel truss gusset plate 15 upper portion, stiffening steel truss gusset plate 15, stiffening steel truss 3 are fixed through the bolt of twisting into bolt hole 16.
Be provided with polylith stiffening steel purlin gusset plate 15 in the concrete beam 4, stiffening steel purlin gusset plate 15 links to each other with 3 both sides of stiffening steel purlin.
A prestressed pipeline 12 along the bridge direction is arranged in the concrete beam 4.
Splicing section shear keys 13 are arranged at the side ends of the concrete beams 4, two adjacent prefabricated sections are connected through the splicing section shear keys 13, and epoxy resin sealant for the bridge is smeared at the joint of the two adjacent prefabricated sections.
The stiffening steel truss 3 may be, but is not limited to, N-shaped, triangular, etc.
Yet another embodiment
The utility model provides a steel purlin concrete beam's cable-stay bridge of putting more energy into, includes girder 5 that directly bears the bridge floor load, girder 5 erects on side mound 7 and passes pylon 2, be provided with many pairs of suspension cable 6 between pylon 2 and the girder 5, girder 5 is assembled to forming by a plurality of prefabricated segments in the same direction as the bridge.
The concrete beam 4 is a box beam, as shown in fig. 4 and 7.
The prefabricated segment is composed of a stiffening steel truss 3 located above and a concrete beam 4 located below, and the stiffening steel truss 3 and the concrete beam 4 are spliced and fixed.
And a stiffening steel truss node plate 15 is arranged in the concrete beam 4, and the stiffening steel truss node plate 15 is connected with a lower chord node of the stiffening steel truss 3.
15 lower parts of stiffening steel truss gusset plates are pre-buried in concrete beam 4, 15 lower parts of stiffening steel truss gusset plates form assembly holes 14, reinforcing steel bars in concrete beam 4 pass through assembly holes 14, it is fixed to form PBL shear force key between 15, the concrete beam 4 of stiffening steel truss gusset plates.
The upper portion of stiffening steel truss gusset plate 15 stretches out concrete beam 4, the bolt hole 16 is formed on stiffening steel truss gusset plate 15 upper portion, stiffening steel truss gusset plate 15, stiffening steel truss 3 are fixed through the bolt of twisting into bolt hole 16.
Be provided with polylith stiffening steel purlin gusset plate 15 in the concrete beam 4, stiffening steel purlin gusset plate 15 links to each other with 3 both sides of stiffening steel purlin.
A prestressed pipeline 12 along the bridge direction is arranged in the concrete beam 4.
Splicing section shear keys 13 are arranged at the side ends of the concrete beams 4, two adjacent prefabricated sections are connected through the splicing section shear keys 13, and epoxy resin sealant for the bridge is smeared at the joint of the two adjacent prefabricated sections.
The main beam 5 and the bridge tower 2 are of a split structure.
The assembly holes 14 are in a rectangular array.
The portion of stretching out of stiffening steel purlin gusset plate 15 is the dysmorphism form, and this dysmorphism form including the horizontal segment that is located the top, and the horizontal segment both sides form the slope section of downward sloping, and slope section lower extreme forms the arc changeover portion.
The bolt holes 16 are distributed in a plurality of array groups, and the top row in each array group is parallel to the inclined section.
Vertical seams are formed in the horizontal sections, compensation shrinkage concrete is filled in the seams of the stiffening steel truss gusset plates 15, 2% longitudinal slopes are formed to facilitate drainage, and PPU waterproof layers are arranged.
The oblique array of the bolt holes 16 and the filling of shrinkage-compensating concrete at the joints can ensure the stable fixation between the stiffening steel truss gusset plate 15 and the stiffening steel truss 3.
The PBL shear keys and shear nails 17 can ensure stable fixation of the stiffening steel truss gusset plate 15 to the concrete beam 4.
The side pier 7 is also provided with an auxiliary pier 8, the side pier 7, the auxiliary pier 8 and the main beam 5 form a secondary side span 9, the side pier 7, the bridge tower 2 and the main beam 5 form a side span 10, and the main beam 5 and the bridge tower 2 form a middle span 11.
Preferably, the midspan 11 is one or more than one midspan.
The stiffening steel truss 3 may take various truss forms without limitation.
One end of the stay cable 6 is anchored to the bridge tower 2 in a steel anchor box, a steel anchor beam or a circumferential prestress anchor mode; the other end of the stay cable 6 is anchored on the concrete beam 4, and the anchoring mode adopts an anchor block type or anchor pulling plate type cable beam anchoring system.
And a lower foundation 1 is arranged below the side pier 7, the auxiliary pier 8 and the bridge tower 2, and the lower foundation 1 is one of a pile foundation, an enlarged foundation and an open caisson foundation.
The main beam 5 is constructed by adopting a segment prefabrication and assembling method, the main beam 5 is longitudinally divided into a plurality of prefabricated segments, and each prefabricated segment comprises a concrete beam 4 segment and a stiffening steel truss 3 segment. The middle span of the concrete beam 4 is provided with a cast-in-place closure section or a wet joint closure, when the rest sections are prefabricated and assembled by sections, the factory prefabrication and the field assembly construction are adopted, a sealing device is arranged between the adjacent prefabricated sections of the concrete beam 4 corresponding to the prestressed pipelines 12 to prevent the pipelines from being blocked and ensure the durability of the pipelines, and the adjacent prefabricated sections of the concrete beam 4 are fixed by a mutually-meshed joint shear key 13.
The utility model discloses structure novel structure, pleasing to the eye can effectively improve structural rigidity, promote structural dynamic performance, greatly improve the beam-ends corner, and the respective material performance advantage of full play steel, concrete obviously reduces the creep deformation of large-span concrete girder. The girder adopts steel purlin stiffening concrete form, and engineering cost and maintenance work load all reduce to some extent, and the concrete beam can adapt to ballastless track and lay the requirement. The girder adopts the prefabricated assembly method construction of segment, has saved construction period, realizes mechanized, standardized construction, and the work progress is also more environmental protection. The method has obvious advantages in the construction of high-speed railways, urban rail traffic, magnetic suspension traffic or highway bridges which need to cross great rivers and gulf straits.
Claims (8)
1. The utility model provides a steel purlin concrete beam's cable-stay bridge, includes girder (5) that directly bears the bridge floor load, its characterized in that: the main beam (5) is erected on the side pier (7) and penetrates through the bridge tower (2), a plurality of pairs of stay cables (6) are arranged between the bridge tower (2) and the main beam (5), and the main beam (5) is formed by splicing a plurality of prefabricated sections along the bridge direction;
the prefabricated segment is composed of a stiffening steel truss (3) located above and a concrete beam (4) located below, and the stiffening steel truss (3) and the concrete beam (4) are spliced and fixed.
2. A cable-stayed bridge of a steel truss-stiffened concrete beam according to claim 1, wherein: be provided with stiffening steel purlin gusset plate (15) in concrete beam (4), stiffening steel purlin gusset plate (15) link to each other with the lower chord node of stiffening steel purlin (3).
3. A cable-stayed bridge of a steel truss-stiffened concrete beam according to claim 2, wherein: stiffening steel truss gusset plate (15) lower part is pre-buried in concrete beam (4), stiffening steel truss gusset plate (15) lower part forms pilot hole (14), reinforcing bar in concrete beam (4) passes pilot hole (14), it is fixed to form the PBL shear force key between stiffening steel truss gusset plate (15), concrete beam (4).
4. A cable-stayed bridge of a steel truss-stiffened concrete beam according to claim 3, wherein: concrete beam (4) are stretched out on the upper portion of stiffening steel truss gusset plate (15), form bolt hole (16) on stiffening steel truss gusset plate (15) upper portion, the bolt of screwing in into bolt hole (16) is fixed to stiffening steel truss gusset plate (15), stiffening steel truss (3).
5. A cable-stayed bridge of a steel truss-stiffened concrete beam according to claim 4, wherein: be provided with polylith stiffening steel truss gusset plate (15) in concrete beam (4), stiffening steel truss gusset plate (15) link to each other with stiffening steel truss (3) both sides.
6. A cable-stayed bridge of a steel truss-stiffened concrete beam according to claim 5, wherein: and a prestressed pipeline (12) along the bridge direction is arranged in the concrete beam (4).
7. A cable-stayed bridge of a steel truss-stiffened concrete beam according to claim 6, wherein: splicing section shear keys (13) are arranged at the side ends of the concrete beams (4), two adjacent prefabricated sections are connected through the splicing section shear keys (13), and epoxy resin sealant for the bridge is smeared at the joint of the two adjacent prefabricated sections.
8. A cable-stayed bridge of a steel truss-stiffened concrete beam according to claim 1, wherein: the concrete beam (4) is a plate beam or a box beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020543462.9U CN212925727U (en) | 2020-04-14 | 2020-04-14 | Cable-stayed bridge of steel truss stiffened concrete beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020543462.9U CN212925727U (en) | 2020-04-14 | 2020-04-14 | Cable-stayed bridge of steel truss stiffened concrete beam |
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| Publication Number | Publication Date |
|---|---|
| CN212925727U true CN212925727U (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020543462.9U Active CN212925727U (en) | 2020-04-14 | 2020-04-14 | Cable-stayed bridge of steel truss stiffened concrete beam |
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| Country | Link |
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| CN (1) | CN212925727U (en) |
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2020
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