CN110373993B - Device for controlling deformation of railway bridge beam end - Google Patents
Device for controlling deformation of railway bridge beam end Download PDFInfo
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- CN110373993B CN110373993B CN201910748208.4A CN201910748208A CN110373993B CN 110373993 B CN110373993 B CN 110373993B CN 201910748208 A CN201910748208 A CN 201910748208A CN 110373993 B CN110373993 B CN 110373993B
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- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 239000004567 concrete Substances 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 description 7
- 238000009499 grossing Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000008602 contraction Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000011513 prestressed concrete Substances 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 208000032170 Congenital Abnormalities Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 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
- E01D19/00—Structural or constructional details of bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a device for controlling deformation of railway bridge beam ends, which comprises a rigid body and sliding parts, wherein the rigid body is positioned between two railway box beam joints, the cross section of the rigid body is matched with the cross section of a cavity of a box beam, two ends of the rigid body respectively extend into the two cavities, the sliding parts are arranged between the surface of the rigid body and the inner wall of the box beam, the sliding parts respectively contact with the surface of the rigid body and the inner wall of the box beam, and a limiting arm is arranged in one of the cavities and is connected with the rigid body. The invention greatly improves the local rigidity of the end part of the high-speed rail bridge, meets the requirement of free expansion of the beam body, has simple and concise structure, is movable, is self-adaptive to various beam types, is convenient to construct and replace, can be used for accelerating new bridges and existing line bridges, has stronger economy and has popularization value.
Description
Technical Field
The invention relates to the field of road transportation, in particular to a device for controlling deformation of a girder end of a railway bridge.
Background
Along with the continuous acceleration of the industrialization and urban processes of China, the development of economy, the progress of technology and the improvement of living standard of residents, the transportation is always an important dynamic factor of regional economy development, and the regional economy development promotes the scientific development of transportation. As a backbone strength in a transportation system, high-speed railways are playing an increasingly important role in the process of economic development in the china area.
The bridge is used as an important component of the civil engineering of the high-speed railway, and has the main function of providing a smooth and stable on-bridge line for the high-speed train so as to ensure the operation safety and the riding comfort of passengers. In the built and under-built high-speed railway, the proportion of the viaduct to the line is above 50%, wherein the proportion of the bridge of the Jingjin intercity railway, the Jinghu high-speed railway and the Guangzhu intercity railway is as high as 87.7%, 80.5% and 94.2%.
From the domestic and foreign aspects, railways are developed towards the directions of high speed and heavy load, and the existing lines are modified in a speed-increasing way. From the prior line speed-up practice of wide depth, accurate speed and the first 5 times, the main problems of speed-up are expressed as congenital defects due to the fact that the railway design in China is limited by economic conditions for a long time, especially the problems of rigidity, integrity and transverse vibration of the bridge are more prominent, and some durability problems are also exposed.
The bridge and culvert structure has reasonable vertical, longitudinal, transverse rigidity and torsional rigidity, has required durability and dynamic characteristics, and meets the requirements of track stability and smoothness, safe running of a high-speed train and riding comfort of passengers. Along with the rapid development of high-speed railways in China, higher requirements are put forward on the bearing capacity and the dynamic performance of railway bridges. The large-span bridge is not suitable to become a control index mainly concerned due to the fact that the deflection deformation curve is relatively mild, the deflection ratio affects the driving safety and comfort and is mainly located in a rigidity abrupt change area, such as a beam end, a main tower, a bridge pier and the like, and deformation in a local range is limited by specifications. If the design specification of the high-speed railway in China prescribes that under the action of vertical static and active load of the train, the vertical rotation angle of the bridge beam end meets the specification of the middle limit value of the specification 7.3.7.
Under the actions of live load, transverse swinging force, centrifugal force, wind force and temperature load, the horizontal folding angle of the beam end caused by transverse horizontal displacement of the pier tops of the two-beam middle piers is not more than 1 per mill radian.
Along with the increase of bridge span and the application of beam-like structures such as combined beams and steel bridges, the rigidity of the beam body is difficult to meet the existing standard. The Chinese railway bridge does not reduce the standard along with the increase of the span, so that key technologies such as the dynamic performance of the large-span bridge suitable for high-speed driving, the smooth deformation control of the track and the like are required to be researched.
Disclosure of Invention
The invention aims to overcome the defects that the rigidity of the existing line accelerating bridge in the prior art does not meet the requirement, and the rigidity of the girder body of the bridge is difficult to meet the existing standard under the conditions of the same girder height and girder section along with the increase of the span of a newly built bridge and the application of the girder, a steel bridge and the like, and the deformation of the girder end of the railway bridge needs to be controlled to meet the standard requirement.
In order to achieve the above object, the present invention provides the following technical solutions:
The utility model provides a control railroad bridge beam end deformation device, includes rigid body and sliding part, the rigid body is located between two railway case roof beam seams, the cross section adaptation of rigid body the cross section of the cavity of case roof beam, the both ends of rigid body stretch into two respectively in the cavity of case roof beam, the surface of rigid body with set up between the inner wall of case roof beam sliding part, sliding part contacts respectively the surface of rigid body with the inner wall of case roof beam, one of them be equipped with the spacing arm in the cavity of case roof beam, the spacing arm is connected the rigid body.
The important factor for limiting the span increase of the high-speed railway bridge is that the railway bridge is very strict in linear and deformation control, the deflection deformation curve is relatively gentle along with the span increase, the deflection-to-span ratio is not a control index which is mainly concerned, the influence on driving safety and comfort is mainly located in a rigidity abrupt change area, such as a beam end, a main tower, a bridge pier and the like, and the deformation influence in a local range is very important. By adopting the device for controlling the deformation of the girder end of the railway bridge, the rigid body can provide larger bending-resistant reaction force at the joint of the girder end, the rigidity of the girder end is increased, a rigidity transition section is formed between two girders, the local rigidity of the girder end of the high-speed railway bridge is greatly improved, and the requirement of free expansion and contraction of the girder is met, so that the problem of insufficient rigidity of the existing line accelerating bridge can be solved, the span of the existing bridge can be increased under the condition of the same girder height, the design of the existing girder body can be optimized, the self-rigidity requirement of the existing box girder is reduced, and the dead weight and the manufacturing cost are reduced; the invention has simple structure, is movable, is self-adaptive to various beam types (prestressed concrete box beams, combined beams, steel box beams and the like), is convenient to construct and replace, can be used for accelerating new bridges and existing line bridges, has stronger economy and has great popularization value.
Preferably, the rigid body is a steel structural member.
Preferably, the box girder is a concrete girder, a steel-concrete composite girder, a steel box girder, or the like.
Preferably, the sliding component comprises a plurality of rollers, all of which are connected to the rigid body and roll along the inner wall of the box girder.
Preferably, the sliding member includes a first smoothing plate connected to an inner wall of the box girder corresponding to the rigid body, and the rigid body is attached to the first smoothing plate.
Preferably, the sliding member further includes a second smoothing plate connected to a surface of the rigid body, and the second smoothing plate is attached to the first smoothing plate.
Preferably, the first smoothing plate and the second smoothing plate are polytetrafluoroethylene plates.
The invention also provides a device for controlling the deformation of the railway bridge girder end, which comprises a rigid body and a sliding part, wherein the rigid body is positioned between two railway girder seams, the cross section of the rigid body is matched with the cross section of a cavity of the girder, two ends of the rigid body respectively extend into the cavities of the two girders, the sliding part is arranged between the surface of the rigid body and the inner wall of the girder, the sliding part respectively contacts with the surface of the rigid body and the inner wall of the girder, limit stops are respectively arranged in the cavities of the two girders, the two limit stops are respectively positioned at two ends of the rigid body, and the limit stops are used for preventing the rigid body from sliding into one of the girders.
The important factor for limiting the span increase of the high-speed railway bridge is that the railway bridge is very strict in linear and deformation control, the deflection deformation curve is relatively gentle along with the span increase, the deflection-to-span ratio is not a control index which is mainly concerned, the influence on driving safety and comfort is mainly located in a rigidity abrupt change area, such as a beam end, a main tower, a bridge pier and the like, and the deformation influence in a local range is very important. By adopting the device for controlling the deformation of the girder end of the railway bridge, the rigid body can provide larger bending-resistant reaction force at the joint of the girder end, the rigidity of the girder end is increased, a rigidity transition section is formed between two girders, the local rigidity of the girder end of the high-speed railway bridge is greatly improved, and the requirement of free expansion and contraction of the girder is met, so that the problem of insufficient rigidity of the existing line accelerating bridge can be solved, the span of the existing bridge can be increased under the condition of the same girder height, the design of the existing girder body can be optimized, the self-rigidity requirement of the existing box girder is reduced, and the dead weight and the manufacturing cost are reduced; the invention has simple structure, is movable, is self-adaptive to various beam types (prestressed concrete box beams, combined beams, steel box beams and the like), is convenient to construct and replace, can be used for accelerating new bridges and existing line bridges, has stronger economy and has great popularization value.
Preferably, an anti-collision block is provided on a face of each of the limit stops toward the end of the rigid body.
Preferably, the crash block is a rubber block.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
By applying the device for controlling the deformation of the girder end of the railway bridge, the rigid body can provide larger bending-resistant reaction force at the joint of the girder end, the rigidity of the girder end is increased, a rigidity transition section is formed between two girders, the local rigidity of the girder end of the high-speed railway bridge is greatly improved, and the requirement of free expansion and contraction of the girder is met, so that the problem of insufficient rigidity of the existing line accelerating bridge can be solved, the span of the existing bridge can be increased under the condition of the same girder height, the design of the existing girder is optimized, the self-rigidity requirement of the existing box girder is reduced, and the dead weight and the manufacturing cost are reduced; the invention has simple structure, is movable, is self-adaptive to various beam types (prestressed concrete box beams, combined beams, steel box beams and the like), is convenient to construct and replace, can be used for accelerating new bridges and existing line bridges, has stronger economy and has great popularization value.
Drawings
Fig. 1 is a schematic structural diagram of a device for controlling deformation of a girder end of a railroad bridge according to embodiment 1;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a schematic structural view of the device for controlling deformation of a girder end of a railroad bridge according to embodiment 2.
The marks in the figure: 1-rigid body, 2-box girder, 21-cavity, 3-sliding part, 4-spacing arm, 5-limit stop.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should not be construed that the scope of the above subject matter of the present invention is limited to the following embodiments, and all techniques realized based on the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1-2, the device for controlling the deformation of the girder end of a railway bridge according to the present invention comprises a rigid body 1 and a sliding component 3, wherein the rigid body 1 is a steel structural member.
The rigid body 1 is positioned between beam joints of two railway box beams 2, the box beams 2 are concrete beams or steel-concrete composite beams, the cross section of the rigid body 1 is matched with the cross section of a cavity 21 of the box beams 2, two ends of the rigid body 1 respectively extend into the two cavities 21, a sliding part 3 is arranged between the surface of the rigid body 1 and the inner wall of the box beams 2, the sliding part 3 respectively contacts with the surface of the rigid body 1 and the inner wall of the box beams 2, one of the cavities 21 is internally provided with a limiting arm 4, and the limiting arm 4 is connected with the rigid body 1.
As a preferred solution of this embodiment, the sliding member 3 comprises a plurality of rollers, all of which are connected to the rigid body 1 and roll along the inner wall of the box girder 2.
As a preferable mode of this embodiment, the sliding member 3 includes a first smooth plate and a second smooth plate, the first smooth plate is connected to the inner wall of the box girder 2 corresponding to the rigid body 1, the second smooth plate is connected to the surface of the rigid body 1, the second smooth plate is attached to the first smooth plate, and the first smooth plate and the second smooth plate are both polytetrafluoroethylene plates.
The important factor for limiting the span increase of the high-speed railway bridge is that the high-speed railway bridge is very strict in linear and deformation control, the deflection deformation curve is relatively gentle along with the span increase, the deflection-span ratio is not a control index which is mainly concerned, the influence on driving safety and comfort is mainly located in a rigidity abrupt change area, such as a beam end, a main tower, a bridge pier and the like, and the deformation influence in a local range is very important.
By applying the device for controlling the deformation of the girder end of the railway bridge, the rigid body 1 can provide larger bending-resistant reaction force at the joint of the girder end, the rigidity of the girder end is increased, a rigidity transition section is formed between two girders, the local rigidity of the girder end of the high-speed railway bridge is greatly improved, and the requirement of free expansion and contraction of the girders is met, so that the problem of insufficient rigidity of the existing line accelerating bridge can be solved, the span of the existing bridge can be increased under the condition of the same girder height, the design of the existing girder is optimized, the self-rigidity requirement of the existing box girder is reduced, and the dead weight and the manufacturing cost are reduced; the invention has simple structure, is movable, is self-adaptive to various beam types (prestressed concrete box beams, combined beams, steel box beams and the like), is convenient to construct and replace, can be used for accelerating new bridges and existing line bridges, has stronger economy and has great popularization value.
Example 2
As shown in fig. 3, the device for controlling the deformation of the girder end of the railway bridge according to the invention comprises a rigid body 1 and a sliding part 3, wherein the rigid body 1 is a steel structural member.
The rigid body 1 is positioned between beam joints of two railway box beams 2, the box beams 2 are concrete beams or steel-concrete composite beams, the cross section of the rigid body 1 is matched with the cross section of a cavity 21 of the box beams 2, two ends of the rigid body 1 respectively extend into the two cavities 21, a sliding part 3 is arranged between the surface of the rigid body 1 and the inner wall of the box beams 2, the sliding part 3 respectively contacts the surface of the rigid body 1 and the inner wall of the box beams 2, limit stops 5 are respectively arranged in the two cavities 21, the two limit stops 5 are respectively positioned at two ends of the rigid body 1, and the limit stops 5 are used for preventing the rigid body 1 from sliding into one of the box beams 2.
As a preferable aspect of the present embodiment, an anti-collision block is provided on a surface of each of the limit stops 5 facing the end of the rigid body 1, and the anti-collision block is a rubber block.
As a preferred solution of this embodiment, the sliding member 3 comprises a plurality of rollers, all of which are connected to the rigid body 1 and roll along the inner wall of the box girder 2.
As a preferable mode of this embodiment, the sliding member 3 includes a first smooth plate and a second smooth plate, the first smooth plate is connected to the inner wall of the box girder 2 corresponding to the rigid body 1, the second smooth plate is connected to the surface of the rigid body 1, the second smooth plate is attached to the first smooth plate, and the first smooth plate and the second smooth plate are both polytetrafluoroethylene plates.
The important factor for limiting the span increase of the high-speed railway bridge is that the high-speed railway bridge is very strict in linear and deformation control, the deflection deformation curve is relatively gentle along with the span increase, the deflection-span ratio is not a control index which is mainly concerned, the influence on driving safety and comfort is mainly located in a rigidity abrupt change area, such as a beam end, a main tower, a bridge pier and the like, and the deformation influence in a local range is very important.
By applying the device for controlling the deformation of the girder end of the railway bridge, the rigid body 1 can provide larger bending-resistant reaction force at the joint of the girder end, the rigidity of the girder end is increased, a rigidity transition section is formed between two girders, the local rigidity of the girder end of the high-speed railway bridge is greatly improved, and the requirement of free expansion and contraction of the girders is met, so that the problem of insufficient rigidity of the existing line accelerating bridge can be solved, the span of the existing bridge can be increased under the condition of the same girder height, the design of the existing girder is optimized, the self-rigidity requirement of the existing box girder is reduced, and the dead weight and the manufacturing cost are reduced; the invention has simple structure, is movable, is self-adaptive to various beam types (prestressed concrete box beams, combined beams, steel box beams and the like), is convenient to construct and replace, can be used for accelerating new bridges and existing line bridges, has stronger economy and has great popularization value.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. The device for controlling the deformation of the girder end of the railway bridge is characterized by comprising a rigid body (1) and a sliding part (3), wherein the rigid body (1) is positioned between girder seams of two box girders (2), the cross section of the rigid body (1) is matched with the cross section of a cavity (21) of the box girders (2), two ends of the rigid body (1) respectively extend into the two cavities (21), the sliding part (3) is arranged between the surface of the rigid body (1) and four inner walls of the box girders (2), the sliding part (3) respectively contacts the surface of the rigid body (1) and the inner walls of the box girders (2), one of the cavity (21) is internally provided with a limiting arm (4), and the limiting arm (4) is connected with the rigid body (1);
The sliding component (3) comprises a plurality of rollers, and all the rollers are connected to the rigid body (1) and roll along the inner wall of the box girder (2);
Or the sliding part (3) comprises a first smooth plate, the first smooth plate is connected to the inner wall of the box girder (2) corresponding to the rigid body (1), and the rigid body (1) is attached to the first smooth plate.
2. The device for controlling deformation of railway bridge girder ends according to claim 1, characterized in that the rigid body (1) is a steel structural member.
3. The device for controlling the deformation of the girder end of a railway bridge according to claim 1, wherein the box girder (2) is a concrete girder, a steel-concrete composite girder, a steel box girder or the like.
4. The device for controlling deformation of railway bridge girder ends according to claim 1, characterized in that the sliding member (3) further comprises a second smooth plate connected to the surface of the rigid body (1), the second smooth plate being attached to the first smooth plate.
5. The device for controlling deformation of a railway bridge girder end according to claim 4, wherein the first smooth plate and the second smooth plate are both polytetrafluoroethylene plates.
6. The device for controlling the deformation of the railway bridge beam end is characterized by comprising a rigid body (1) and a sliding part (3), wherein the rigid body (1) is positioned between beam joints of two box beams (2), the cross section of the rigid body (1) is matched with the cross section of a cavity (21) of the box beams (2), two ends of the rigid body (1) respectively extend into the two cavities (21), the sliding part (3) is arranged between the surface of the rigid body (1) and four inner walls of the box beams (2), the sliding part (3) respectively contacts the surface of the rigid body (1) and the inner walls of the box beams (2), limit stops (5) are respectively arranged in the two cavities (21), and the two limit stops (5) are respectively positioned at two ends of the rigid body (1);
The sliding component (3) comprises a plurality of rollers, and all the rollers are connected to the rigid body (1) and roll along the inner wall of the box girder (2);
Or the sliding part (3) comprises a first smooth plate, the first smooth plate is connected to the inner wall of the box girder (2) corresponding to the rigid body (1), and the rigid body (1) is attached to the first smooth plate.
7. The device for controlling deformation of railway bridge girder ends according to claim 6, characterized in that each limit stop (5) is provided with an anti-collision block on the side facing the end of the rigid body (1).
8. The apparatus for controlling deformation of a girder end of a railroad bridge according to claim 7, wherein the crashproof block is a rubber block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910748208.4A CN110373993B (en) | 2019-08-13 | 2019-08-13 | Device for controlling deformation of railway bridge beam end |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910748208.4A CN110373993B (en) | 2019-08-13 | 2019-08-13 | Device for controlling deformation of railway bridge beam end |
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| CN110373993A CN110373993A (en) | 2019-10-25 |
| CN110373993B true CN110373993B (en) | 2024-06-25 |
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