CN110820517A - Assembled railway tubular beam - Google Patents
Assembled railway tubular beam Download PDFInfo
- Publication number
- CN110820517A CN110820517A CN201911163602.8A CN201911163602A CN110820517A CN 110820517 A CN110820517 A CN 110820517A CN 201911163602 A CN201911163602 A CN 201911163602A CN 110820517 A CN110820517 A CN 110820517A
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- tubular beam
- railway
- prefabricated section
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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
-
- 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
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- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to the technical field of bridge engineering, in particular to an assembly type railway tubular beam, which comprises a tubular beam main body, wherein a train channel for erecting a railway is arranged in the tubular beam main body, and the tubular beam main body is mainly formed by sequentially butting a plurality of prefabricated section units of ultrahigh-performance concrete; on the butt joint part of two adjacent prefabricated section units, at least one butt joint surface of one prefabricated section unit is provided with a shear key, and the other butt joint surface is provided with a groove for being matched with the shear key, so that the prefabricated section unit is matched with other prefabricated section units. Through setting up foretell assembled railway tubular beam, reduced building height to tubular beam structure is lighter, is convenient for realize the batch production prefabrication, is convenient for construct. The pipe beam adopts an assembly type structure, the bridge structure is independent into an individual, and the single segment can obtain high-quality bridge structure prefabricated segments under good manufacturing conditions of a factory to form the prefabricated segment unit.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to an assembled railway tubular beam.
Background
At present, the high-speed railway in China has high operation density, more operation mileage, high operation speed and higher requirements on safety and comfort. In order to meet the requirements of high reliability, high stability and high smoothness of high-speed railway lines, the lines are usually constructed by adopting a bridge structure, and the proportion of the bridge to the total length of the main line is more than 60% and even up to 94.0%. However, at present, the high-speed railway bridge in China is basically a small and medium span prestressed concrete simply supported box girder bridge or a continuous box girder bridge, and the standard span of the commonly used simply supported box girder bridge is 32 m. Under the condition of adopting a large number of medium and small span bridges, the line smoothness index is more sensitive to uneven settlement of the foundation; the prestressed concrete beam bridge is limited by material and structural characteristics, and the service performance of the prestressed concrete beam bridge is obviously influenced by material and structural factors (shrinkage creep, temperature stress, prestress loss and the like) and environmental factors (freeze-thaw cycle, chloride ion erosion and the like), so that the driving comfort is obviously reduced and even the driving safety is endangered.
Disclosure of Invention
The invention aims to provide an assembly type railway tubular beam which is suitable for a large-span bridge and has longer service life.
In order to achieve the purpose, the technical scheme adopted by the application is that the fabricated railway tubular beam comprises a tubular beam main body, wherein a train channel for railway erection is arranged in the tubular beam main body, and the tubular beam main body is mainly formed by sequentially butting a plurality of prefabricated section units of ultrahigh-performance concrete;
on the butt joint part of two adjacent prefabricated section units, at least one butt joint surface of one prefabricated section unit is provided with a shear key, and the other butt joint surface is provided with a groove for being matched with the shear key, so that the prefabricated section unit is matched with other prefabricated section units.
In the existing high-speed railway bridge, most bridge structures are traditional prestressed concrete box girders, the structure types of the traditional prestressed concrete box girders are simply supported girders and continuous girders, the higher building height of the traditional prestressed concrete box girders obviously increases the transverse deformation of the structure under the action of transverse swinging force, and the driving smoothness and the driving comfort are reduced. For the existing ultra-high performance concrete box girder bridge, the concrete pouring quality is difficult to control, various types of ultra-high performance concrete have strict requirements on the construction quality, and the good stress performance and the good durability are all established on the premise that the construction quality reaches the standard. Meanwhile, the ultra-high performance concrete has strict requirements on curing conditions, generally requires high-temperature steam curing and special curing equipment, on-site steam curing is not only difficult to ensure the quality, but also wastes time and labor, so that the construction period is prolonged, the construction cost is increased, once the construction quality does not meet the standard, the performance is seriously reduced, and meanwhile, a longer construction period can cause traffic interruption and bring greater economic loss.
Through setting up foretell assembled railway tubular beam, compare with traditional concrete box girder, it moves the line position from the roof beam to the tubular beam inside, has reduced building height to the tubular beam structure is lighter, is convenient for realize the factory prefabrication, is convenient for be under construction. The pipe beam adopts an assembly type structure, the bridge structure is independent into an individual, and the single segment can obtain high-quality bridge structure prefabricated segments under good manufacturing conditions of a factory to form the prefabricated segment unit. The section of the butt joint surface of the prefabricated section unit or the tubular beam main body adopts a box-shaped section, and the section can be a square section or an extended section.
Furthermore, the shearing force pieces are trapezoidal bulges on the butt joint surfaces of the prefabricated section units, and the butt joint surfaces of the adjacent prefabricated section units are bonded through epoxy resin glue and connected through prestressed steel bundles inserted into the walls of the prefabricated section units.
During construction, the prefabricated section units are fixed by using temporary prestress, then the prestressed steel beams required by the design of the tubular beams are stretched, and then the temporary prestress is relieved.
Furthermore, two webs parallel to each other on two sides of the tubular beam main body are provided with side holes arranged along the length direction of the tubular beam main body.
The side hole here may be in the form of a combination of a rectangle and a circle, a combination of a rectangle and an ellipse, a circle, or a rectangle with rounded chamfers. The side hole is attractive, the dead weight of the prefabricated section unit is reduced, the wind resistance safety of the bridge under the action of cross wind is improved, the prefabricated section unit or the whole tubular beam has high wind resistance, and the tubular beam can be more stable.
Further, the side holes are formed by butting the concave edges of two adjacent prefabricated section units. The side holes are formed in such a manner that the strength, rigidity, and stability are locally maintained, and the overall strength and rigidity are excessively lost as compared with the case where the entire hole is formed in other regions.
Furthermore, the top end of the tubular beam main body is provided with upper holes which are arranged along the length direction of the tubular beam main body.
Further, the upper hole is formed by butting the concave edges of two adjacent prefabricated section units.
Furthermore, a fish-bellied stiffening beam extending along the width direction of the bottom plate is arranged on the lower side of the bottom plate of the prefabricated section unit, and the lower side of the fish-bellied stiffening beam is arched downwards to form a curved surface; the fish belly formula stiffening beam is arranged along tubular beams main part length direction.
Through setting up foretell fish belly formula stiffening beam, the purpose of design like this is because tubular beams bottom plate intermediate position is comparatively weak, and the atress is too big, can take place great moment of flexure and downwarping, and the local rigidity in order to improve the bottom plate of putting more energy into, and the bottom plate both sides are compared with the centre in addition, and rigidity is great, for alleviateing dead weight and pleasing to the eye effect, consequently adopts this fish belly formula stiffening beam, can be fine reach light in weight, strengthen the effectual requirement of intensity.
Furthermore, the fish-bellied stiffening beam and the prefabricated section tubular beam are of an integrated structure.
Furthermore, the top plate and the web plate of the prefabricated section unit are transited through a tangent curve, and the transition part forms a smooth curved surface. Further, the inner side of the precast segment unit is provided with a continuous top web stiffening rib connected between the inner side of the web and the inner side of the top plate.
Adopt the transverse rib of putting more energy into to consolidate, this transverse rib of putting more energy into can regard as prestressing tendons anchor piece, can regard as the strutting arrangement of high-speed railway contact net again, need not unnecessary construction contact net pillar again.
The invention is further described with reference to the following figures and detailed description. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description. Or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to assist in understanding the invention, and are included to explain the invention and their equivalents and not limit it unduly. In the drawings:
FIG. 1 is a schematic view illustrating the fabricated railroad tubular beam;
FIG. 2 is a schematic top perspective view of a prefabricated section unit for illustrating a portion of FIG. 1 at A;
FIG. 3 is a schematic view of a prefabricated section unit partially shown at A in FIG. 1;
FIG. 4 is a schematic cross-sectional view for illustrating the present prefabricated segment construction;
FIG. 5 is a schematic side view illustrating the construction of the present prefabricated segment;
FIG. 6 is a schematic view illustrating two of the present prefabricated segment structures after being connected using prestressed steel strands;
the labels in the figure are: 1-web plate, 2-bottom plate, 3-fish belly type stiffening beam, 4-shear key, 5-top web plate stiffening rib, 6-top plate and 61-top plate beam.
Detailed Description
The invention will be described more fully hereinafter with reference to the accompanying drawings. Those skilled in the art will be able to implement the invention based on these teachings. Before the present invention is described in detail with reference to the accompanying drawings, it is to be noted that:
the technical solutions and features provided in the present invention in the respective sections including the following description may be combined with each other without conflict.
Moreover, the embodiments of the present invention described in the following description are generally only examples of a part of the present invention, and not all examples. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
With respect to terms and units in the present invention. The term "comprises" and any variations thereof in the description and claims of this invention and the related sections are intended to cover non-exclusive inclusions.
Referring to fig. 1 to 6, the fabricated tubular beam for a railway comprises a tubular beam main body, wherein a train passage for railway construction is arranged in the tubular beam main body, and the tubular beam main body is mainly formed by sequentially butting a plurality of prefabricated section units made of ultra-high performance concrete;
on the butt joint part of two adjacent prefabricated section units, at least one butt joint surface of one prefabricated section unit is provided with a shear key 4, and the other butt joint surface is provided with a groove for being matched with the shear key 4, so that the prefabricated section unit is mutually matched with other prefabricated section units.
The application of Ultra-high-performance Concrete (UHPC) can realize the large span of the bridge, and aiming at the bridge with the large span, on the basis, for higher safety and construction efficiency, the prefabricated section unit of the pipe beam with high reliability and durability can be prepared by combining the characteristics of the UHPC, so that the assembled railway pipe beam is realized.
This assembled railway tubular beam compares with traditional concrete box girder, and it moves the line position from the roof beam to the tubular beam inside, has reduced building height to the tubular beam structure is lighter, is convenient for realize the batch production prefabrication, is convenient for construct. The pipe beam adopts an assembly type structure, the bridge structure is independent into an individual, and the single segment can obtain high-quality bridge structure prefabricated segments under good manufacturing conditions of a factory to form the prefabricated segment unit. The section of the butt joint surface of the prefabricated section unit or the tubular beam main body adopts a box-shaped section, and the section can be a square section or an extended section.
The prefabricated section units are used for realizing factory prefabrication and assembly construction, and the structural form and the size of each section are consistent.
The shear pieces are trapezoidal bulges on the butt joint surfaces of the prefabricated section units, and the butt joint surfaces of the adjacent prefabricated section units are bonded through epoxy resin glue and connected through prestressed steel beams. Two webs 1 that the both sides of tubular beam main part are parallel to each other all are provided with the side opening of arranging along tubular beam main part length direction.
The side hole here may be in the form of a combination of a rectangle and a circle, a combination of a rectangle and an ellipse, a circle, or a rectangle with rounded chamfers. The side hole is formed by butting the concave edges of two adjacent prefabricated section units. This forms the aforementioned side hole. The web plate 1 can be used as a train sound barrier device while being used as a beam body stress structure.
The top end of the tubular beam main body is provided with upper holes which are arranged along the length direction of the tubular beam main body. The upper hole is formed by butting the concave edges of two adjacent prefabricated section units. Likewise, the upper hole may be a combination of a rectangle and a circle, a combination of a rectangle and an ellipse, a circle, or a rectangle with rounded corners.
The top plate 6 and the web plate 1 of the prefabricated section unit are transited through a tangent curve, and the transition part forms a smooth curved surface. In the roof 6, in order to reinforce the strength of the narrow portion after the roof is perforated, a roof cross member 61 may be provided to the narrow portion to enhance the strength of the roof.
The lower side of the bottom plate 2 of the prefabricated section unit is provided with a fish-bellied stiffening beam 3 extending along the width direction of the bottom plate 2, and the lower side of the fish-bellied stiffening beam 3 is arched downwards to form a curved surface; the fish belly formula stiffening beam 3 is arranged along tubular beam main part length direction. The fish belly formula stiffening beam 3 and prefabricated section unit formula structure as an organic whole.
The inner side of the prefabricated section unit is provided with a top web stiffening rib 5 which is connected with the inner side of the web 1 and the inner side of the top plate 6 in a continuous way. Adopt top web stiffening rib 5 to consolidate, this top web stiffening rib 5 can regard as prestressing tendons anchor block, can regard as the strutting arrangement of high-speed railway contact net again, need not unnecessary construction contact net pillar again.
The fabricated railway tubular beam adopts a fabricated structure, and is convenient for factory manufacturing and fabricated construction. The line is arranged inside the tubular beam, the building height is lower, the anti-overturning performance is strong, and the external prestressed tendons can be avoided due to the small using amount of the prestressed tendons. The tubular beam has high torsional rigidity and small diaphragm plate area, and compared with the traditional prestressed concrete box beam, the pneumatic performance and the driving safety of the whole system are obviously improved. The internal stiffening transverse rib can be used as a prestressed tendon anchoring block and can also be used as a supporting device of a high-speed rail contact network. The bridge has beautiful appearance, can be derived into landscape bridges, highway bridges and the like, and can be harmoniously integrated with the natural environment. The holes on the side surfaces of the beam body can meet the lighting inside the bridge and can appreciate beautiful scenery around the bridge, and the bridge floor can be reasonably provided with water drainage holes to quickly drain rain, snow water and the like on the bridge floor.
The contents of the present invention have been explained above. Those skilled in the art will be able to implement the invention based on these teachings. All other embodiments, which can be derived by a person skilled in the art from the above description without inventive step, shall fall within the scope of protection of the present invention.
Claims (10)
1. The fabricated railway tubular beam is characterized by comprising a tubular beam main body, wherein a train channel for erecting a railway is arranged in the tubular beam main body, and the tubular beam main body is mainly formed by sequentially butting a plurality of prefabricated section units of ultrahigh-performance concrete;
on the butt joint part of two adjacent prefabricated section units, at least one butt joint surface of one prefabricated section unit is provided with a shear key, and the other butt joint surface is provided with a groove for being matched with the shear key, so that the prefabricated section unit is matched with other prefabricated section units.
2. The fabricated railway tubular beam of claim 1, wherein the shear members are trapezoidal protrusions on the abutting surfaces of the precast segment units, and the abutting surfaces of the adjacent precast segment units are bonded by epoxy glue and connected by prestressed steel bundles inserted through the walls of the precast segment units.
3. A fabricated railway tubular beam as claimed in claim 1, wherein two webs parallel to each other on both sides of the tubular beam body are each provided with a side hole arranged along a length direction of the tubular beam body.
4. A fabricated railway tubular beam as claimed in claim 3, wherein the side opening is formed by abutting concave edges of two adjacent precast segment units.
5. A fabricated railway tubular beam as claimed in claim 1, wherein the top end of the tubular beam body is provided with upper holes aligned along the length of the tubular beam body.
6. A fabricated railway tubular beam as claimed in claim 5, wherein the upper aperture is formed by abutting concave edges of two adjacent precast segment units.
7. An assembled railway tubular beam as claimed in claim 1, wherein the underside of the floor of the precast segment unit is provided with a fish-bellied stiffening beam extending in the width direction of the floor, and the underside of the fish-bellied stiffening beam is downwardly arched to form a curved surface; the fish belly formula stiffening beam is arranged along tubular beams main part length direction.
8. A fabricated railway tubular beam as claimed in claim 7, wherein the fish-bellied stiffening beam is of one-piece construction with the precast segment units.
9. An assembled railway tubular beam as claimed in claim 1, wherein the precast segment unit is transited between the top plate and the web by a tangent curve, and the transition portion forms a rounded curved surface.
10. An assembled railway tubular beam as claimed in claim 1, wherein the interior side of the precast section unit is provided with a coherent top web stiffener connecting the interior side of the web and the interior side of the top slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911163602.8A CN110820517A (en) | 2019-11-25 | 2019-11-25 | Assembled railway tubular beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911163602.8A CN110820517A (en) | 2019-11-25 | 2019-11-25 | Assembled railway tubular beam |
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| Publication Number | Publication Date |
|---|---|
| CN110820517A true CN110820517A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911163602.8A Pending CN110820517A (en) | 2019-11-25 | 2019-11-25 | Assembled railway tubular beam |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111535182A (en) * | 2020-03-31 | 2020-08-14 | 中国建筑第六工程局有限公司 | Tubular bridge girder erection method |
| CN112921784A (en) * | 2021-01-27 | 2021-06-08 | 中铁大桥勘测设计院集团有限公司 | Rail transit steel-concrete composite beam with sound insulation function |
| CN113668356A (en) * | 2021-08-30 | 2021-11-19 | 广东省铁路规划设计研究院有限公司 | Tank-box mixed beam and application thereof |
-
2019
- 2019-11-25 CN CN201911163602.8A patent/CN110820517A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111535182A (en) * | 2020-03-31 | 2020-08-14 | 中国建筑第六工程局有限公司 | Tubular bridge girder erection method |
| CN112921784A (en) * | 2021-01-27 | 2021-06-08 | 中铁大桥勘测设计院集团有限公司 | Rail transit steel-concrete composite beam with sound insulation function |
| CN113668356A (en) * | 2021-08-30 | 2021-11-19 | 广东省铁路规划设计研究院有限公司 | Tank-box mixed beam and application thereof |
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