CN102261022B - Big unit type track slabs of ballastless track - Google Patents
Big unit type track slabs of ballastless track Download PDFInfo
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- CN102261022B CN102261022B CN 201110113932 CN201110113932A CN102261022B CN 102261022 B CN102261022 B CN 102261022B CN 201110113932 CN201110113932 CN 201110113932 CN 201110113932 A CN201110113932 A CN 201110113932A CN 102261022 B CN102261022 B CN 102261022B
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Abstract
The invention relates to big unit type track slabs of a ballastless track. The tensile and compressive stresses of the components of the track slabs of the ballastless track are not completely the same along with temperature variation, thus causing deformation differences of the components and even bed slab cracks and fracture and affecting the smoothness and service life of the track. The track slabs are characterized by utilizing permeable true expansion joints to divide the bed slab of the ballastless track into a plurality of big unit slabs and then utilizing impermeable dummy expansion joints to divide the big unit slabs into a plurality of small unit slabs to fit with impermeable dummy expansion joints which are arranged on a supporting bed and correspond to the true and dummy joints on the bed slab to mitigate deformation of the track slabs caused along with variation of environmental factors through synergy. The big unit type track slabs have the following advantages: the big unit structures of the track slabs reduce the tensile and compressive stresses generated inside the bed slab, thus avoiding over limit, over standard and irregular cracks caused by continuous structures of the track, especially avoiding bed slab arching happening in the extreme high temperature seasons and ensuring the smoothness and safety of the track.
Description
Technical field
The invention belongs to the railway track construction technical field, be specifically related to a kind of big unit type track slabs of ballastless track.
Background technology
Traditional railroad track is comprised of ballast bed, sleeper, rail and fastener etc., directly the sleeper of supporting rail is generally treated sleeper, be embedded in the stone tiny fragments of stone, coal, etc., its effect is that the load with rail is delivered on the roadbed, although the track cost of the type is lower, but linear precision is not high, and maintenance capacity is large, is not suitable for the current of bullet train.In recent years, in order to adapt to the needs of railway speed increase, the non-fragment orbit technology is good with its ride comfort, life cycle management long, safeguard that less characteristics become the advanced track technology that substitutes conventional rails, and its linear high-precision characteristics are so that train operation has higher safety and comfortableness.The sleeper of non-fragment orbit is reinforced concrete precast member, in earth roadbed or tunnel, after rail and sleeper are laid respectively and are poured into the concrete road bed board, in the larger area of temperature Change, each ingredient of track is temperature variant to be drawn, compressive stress is not quite similar, and causes the deformation difference of each ingredient, even the phenomenon of railway roadbed plank split, fracture occurs, ride comfort and the application life of non-fragment orbit be will greatly affect when serious, speed and the safety of train operation also reduced.
Summary of the invention
The purpose of this invention is to provide and a kind ofly utilize penetrating flexible true seam that the road bed board is divided into some big unit plates, the big unit plate is divided into the big unit type track slabs of ballastless track of some junior unit plates with not penetrating flexible baste again, cooperate arrange on the supporting bed with the true and false seam of road bed board not penetrating flexible baste one to one, acting in conjunction relaxes track plates and changes the deformation that produces and the cracking of avoiding bed board with environmental factor.
The technical solution adopted in the present invention is:
Big unit type track slabs of ballastless track includes supporting bed, road bed board and sleeper, and the road bed board is laid on the supporting bed, and sleeper is embedded on the road bed board, it is characterized in that:
Be provided with the flexible true seam of penetrating road bed board on the described road bed board, be provided with the flexible baste of some impermeable roads bed board between the flexible true seam of road bed board;
Position and the sleeper position of the flexible true seam of described road bed board and the flexible baste of road bed board are not overlapping;
Described supporting bed upper surface is provided with the flexible baste of impermeable supporting bed corresponding to the position of the flexible true seam of road bed board and the flexible baste of road bed board.
The degree of depth of cracking of the flexible baste of described supporting bed is 1/4 of supporting bed thickness, and width is 4～8 millimeters.
The width of the flexible true seam of described road bed board is 20～40 millimeters.
The degree of depth of cracking of the flexible baste of described road bed board is 1/4 of supporting bed thickness, and width is 4～8 millimeters.
All be perfused with elastic water-proof embedding sealing in the flexible baste of described supporting bed and the flexible baste of road bed board.
Between the flexible true seam seam of described road bed board dowel bar is set, lower floor's filled polyethylene cystosepiment of dowel bar between seam, upper strata perfusion elastic water-proof embedding sealing.
Described road bed board adopts double-deck arrangement of reinforcement, individual layer arrangement of reinforcement or unreinforced structure.
When described road bed board adopted double-deck reinforcement structure, the upper strata longitudinal reinforcement disconnected at the flexible baste place of road bed board, and lower floor's reinforcing bar does not disconnect.
When described road bed board adopted the individual layer reinforcement structure, longitudinal reinforcement was crossed over the flexible baste of road bed board, and staggered symmetrical disconnection the in the flexible baste both sides of road bed board, and the reinforcing bar of crossing over the flexible baste of road bed board partly wraps up layer of plastic film or pitching.
When described road bed board adopted the unreinforced structure, flexible baste place arranged vertical bar dowel at the road bed board, and bar dowel one end is fixed in the bed board, other end parcel layer of plastic film or pitching.
The present invention has the following advantages:
The big unit structure of track plates involved in the present invention, make that the railway roadbed intralamellar part produces, diminished by drawing of causing of variations in temperature, compressive stress, that has avoided that the track continuous structure produces transfinites, exceeds standard and irregular cracks, the phenomenon that particularly can avoid the railway roadbed plate arch at the thermal extremes Seasonal occurrence to rise; Because this track plates allows structure flexible, greatly reduces the stress in the bed board, thereby can reduce the longitudinal reinforcement amount in the plate, compare with the continuous orbit plate, under equal projected life intensity, can save at least 1/3 or 1/2 amount of reinforcement; Set true, baste all adopt the perfusion of elasticity caulk compound, and anti-sealing and sand and dust are invaded in the seam, can avoid environment to concrete erosion, guarantee the application life of road bed board; Bed board flexible true seam place in road arranges dowel bar, limited the shear strain between the plate, the baste place arranges that an amount of reinforcing bar links to each other or reinforcing bar is crossed over, and has limited equally the shear strain between the plate, can guarantee that orbital position and line midline remain on the original position state, have guaranteed the ride comfort of train operation.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation that bed board adopts individual layer arrangement of reinforcement scheme.
Among the figure, 1-roadbed, 2-supporting bed, 3-road bed board, 4-sleeper, the flexible true seam of 5-road bed board, the 6-road bed board baste that stretches, the 7-supporting bed baste that stretches, 8-dowel bar, 9-road bed board longitudinal reinforcement, 10-road bed board transverse reinforcement.
The specific embodiment
The present invention will be described in detail below in conjunction with the specific embodiment.
Big unit type track slabs of ballastless track involved in the present invention is provided with supporting bed 2, road bed board 3 and sleeper 4.
Supporting bed 2 is routed on the roadbed 1, can adopt C15, C20 concrete or hydraulicity supporting bed, and thickness is 250～300 millimeters, and width is 3 meters.Its upper surface sawing goes out the flexible baste 7 of the supporting bed vertical with orbital direction, and the degree of depth is 1/4 of supporting bed 2 thickness, and width is 4～8 millimeters.Distance between the flexible baste 7 of per two supporting beds is 3.9 meters.Perfusion waterproof embedding sealing forms the elastic body that is adhered in the concrete seam in the flexible baste 7 of supporting bed after the embedding sealing is solidified.
It is flexible that the present invention can adapt to the temperature that-45 ℃～+ 70 ℃ extreme low temperatures, hot environments cause, when low-temperature condition, big unit road bed board 3 shortens, and bed board flexible true seam 5 in road broadens, and bed board flexible baste 6 weakenings place in road form limited crack; When the condition of high temperature, 3 elongations of big unit road bed board, squeezed the closing in limited crack that bed board flexible baste 6 weakenings place in road form, bed board flexible true seam 5 in road narrows down.This big unit structure makes that the inner temperature that produce of bed board 3 are drawn, compressive stress diminishes, and that has avoided that the sort of continuous structure produces transfinites, exceeds standard and irregular cracks, particularly can avoid playing phenomenon at the railway roadbed plate arch of thermal extremes Seasonal occurrence.
The stretch flexible true seam 5 of baste 7, road bed board and the flexible baste 6 of road bed board of supporting bed all adopts the caulk compound perfusion, colloid has suitable elasticity and enough secure bond between the strong and concrete, anti-sealing, in the intrusion seam of sand and dust, can avoid environment to concrete erosion, guarantee the application life of road bed board.
In the flexible true seam 5 of road bed board dowel bar is set, has limited the shear strain between the plate; Bed board flexible baste 6 in road has that an amount of reinforcing bar links to each other or reinforcing bar is crossed over, and has limited equally the shear strain between the plate.This restriction can guarantee that orbital position and line midline remain on the original position state, have guaranteed the ride comfort of train operation.
Because the track plates that the present invention relates to allows structure flexible, greatly reduces the railway roadbed Stress of plate interior, thereby can reduce the longitudinal reinforcement amount in the plate.Compare with the continuous orbit plate, under equal projected life intensity, can save at least 1/3 or 1/2 amount of reinforcement.
Claims (10)
1. big unit type track slabs of ballastless track includes supporting bed (2), road bed board (3) and sleeper (4), and road bed board (3) is laid on the supporting bed (2), and sleeper (4) is embedded on road bed board (3), it is characterized in that:
Be provided with the flexible true seam of penetrating road bed board (5) on the described road bed board (3), be provided with bed board flexible baste (6) in some impermeable roads between the flexible true seam of road bed board (5);
Position and sleeper (4) position of the flexible baste (6) of the flexible true seam of described road bed board (5) and road bed board are not overlapping;
Described supporting bed (2) upper surface is provided with the flexible baste (7) of impermeable supporting bed corresponding to the position of the flexible true seam of road bed board (5) and the flexible baste (6) of road bed board.
2. big unit type track slabs of ballastless track according to claim 1 is characterized in that the stretch degree of depth of cracking of baste (7) of described supporting bed is 1/4 of supporting bed thickness, and width is 4～8 millimeters.
3. big unit type track slabs of ballastless track according to claim 1 is characterized in that the width of the flexible true seam of described road bed board (5) is 20～40 millimeters.
4. big unit type track slabs of ballastless track according to claim 1 is characterized in that the degree of depth of cracking of the flexible baste (6) of described road bed board is 1/4 of supporting bed thickness, and width is 4～8 millimeters.
5. big unit type track slabs of ballastless track according to claim 1 is characterized in that described supporting bed stretches all to be perfused with elastic water-proof embedding sealing in baste (7) and the flexible baste (6) of road bed board.
6. big unit type track slabs of ballastless track according to claim 1, it is characterized in that: between the flexible true seam of described road bed board (5) seam dowel bar (8) is set, lower floor's filled polyethylene cystosepiment of dowel bar between seam (8), upper strata perfusion elastic water-proof embedding sealing.
7. big unit type track slabs of ballastless track according to claim 1, it is characterized in that: described road bed board (3) adopts double-deck arrangement of reinforcement, individual layer arrangement of reinforcement or unreinforced structure.
8. big unit type track slabs of ballastless track according to claim 7 is characterized in that: when described road bed board (3) adopted double-deck reinforcement structure, the upper strata longitudinal reinforcement was located to disconnect at the flexible baste (6) of road bed board, and lower floor's reinforcing bar does not disconnect.
9. big unit type track slabs of ballastless track according to claim 7, it is characterized in that: when described road bed board (3) adopts the individual layer reinforcement structure, longitudinal reinforcement is crossed over the flexible baste (6) of road bed board, and staggered symmetrical disconnection the in flexible baste (6) both sides of road bed board, and the reinforcing bar of the flexible baste (6) of leap road bed board partly wraps up layer of plastic film or pitching.
10. big unit type track slabs of ballastless track according to claim 7, it is characterized in that: when described road bed board (3) adopts the unreinforced structure, locate to arrange vertical bar dowel at the flexible baste (6) of road bed board, bar dowel one end is fixed in the bed board, other end parcel layer of plastic film or pitching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110113932 CN102261022B (en) | 2011-05-04 | 2011-05-04 | Big unit type track slabs of ballastless track |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110113932 CN102261022B (en) | 2011-05-04 | 2011-05-04 | Big unit type track slabs of ballastless track |
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| Publication Number | Publication Date |
|---|---|
| CN102261022A CN102261022A (en) | 2011-11-30 |
| CN102261022B true CN102261022B (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110113932 Active CN102261022B (en) | 2011-05-04 | 2011-05-04 | Big unit type track slabs of ballastless track |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109352793A (en) * | 2018-09-05 | 2019-02-19 | 北京九州轨隔振技术有限公司 | A kind of manufacturing method of multistage precast track plate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2354958A1 (en) * | 1973-11-02 | 1975-06-05 | Strabag Bau Ag | Ballastless permanent way for railway vehicles - has prefabricated concrete supports which rest after alignment on hardenable filling |
| CN201459522U (en) * | 2009-07-02 | 2010-05-12 | 中铁二院工程集团有限责任公司 | Integral type ballastless track |
| CN201506941U (en) * | 2009-08-27 | 2010-06-16 | 周立新 | Unit-type track plate longitudinal connecting structure of rear expansion way plate-type ballastless track |
| CN101798785A (en) * | 2010-04-08 | 2010-08-11 | 中铁二院工程集团有限责任公司 | Ballastless track structure |
| CN202194031U (en) * | 2011-05-04 | 2012-04-18 | 中铁第一勘察设计院集团有限公司 | Large unit type track plate for ballastless tracks |
-
2011
- 2011-05-04 CN CN 201110113932 patent/CN102261022B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2354958A1 (en) * | 1973-11-02 | 1975-06-05 | Strabag Bau Ag | Ballastless permanent way for railway vehicles - has prefabricated concrete supports which rest after alignment on hardenable filling |
| CN201459522U (en) * | 2009-07-02 | 2010-05-12 | 中铁二院工程集团有限责任公司 | Integral type ballastless track |
| CN201506941U (en) * | 2009-08-27 | 2010-06-16 | 周立新 | Unit-type track plate longitudinal connecting structure of rear expansion way plate-type ballastless track |
| CN101798785A (en) * | 2010-04-08 | 2010-08-11 | 中铁二院工程集团有限责任公司 | Ballastless track structure |
| CN202194031U (en) * | 2011-05-04 | 2012-04-18 | 中铁第一勘察设计院集团有限公司 | Large unit type track plate for ballastless tracks |
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| CN102261022A (en) | 2011-11-30 |
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Effective date of registration: 20160725 Address after: 100844 Fuxing Road, Beijing, Haidian District, No. 10 Patentee after: CHINA RAILWAY CORPORATION Patentee after: China Railway First Survey & Design Institute Group Co., Ltd. Address before: 710043 Shaanxi province Xi'an Xiying Road No. two Patentee before: China Railway First Survey & Design Institute Group Co., Ltd. |