CN102261022A - Big unit type track slabs of ballastless track - Google Patents
Big unit type track slabs of ballastless track Download PDFInfo
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- CN102261022A CN102261022A CN2011101139323A CN201110113932A CN102261022A CN 102261022 A CN102261022 A CN 102261022A CN 2011101139323 A CN2011101139323 A CN 2011101139323A CN 201110113932 A CN201110113932 A CN 201110113932A CN 102261022 A CN102261022 A CN 102261022A
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- bed board
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- baste
- track
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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 non-fragment orbit big unit formula track plate.
Background technology
Traditional railroad track is made up 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 loading transfer with rail is to roadbed, though the track cost of the type is lower, but linear precision is not high, and maintenance capacity is big, 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, cycle life-cycle long, safeguard that less characteristics become the advanced track technology that substitutes conventional rails, and its linear high-precision characteristics make train operation have higher safety and comfortableness.The sleeper of non-fragment orbit is a 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 bigger 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 takes place, the ride comfort and the application life of non-fragment orbit be will influence when serious greatly, the 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 non-fragment orbit big unit formula track plate of some junior unit plates with not penetrating flexible baste again, cooperate be provided with on the supporting bed with the not penetrating one to one flexible baste of the true and false seam of road bed board, acting in conjunction relaxes the track plate and changes deformation that produces and the cracking of avoiding bed board with environmental factor.
The technical solution adopted in the present invention is:
Non-fragment orbit big unit formula track plate 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:
Described road bed board is provided with the flexible true seam of penetrating road bed board, is provided with the flexible baste of some impermeable roads bed board between the flexible true seam of road bed board;
The position and the sleeper position of 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 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 a 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 a supporting bed thickness, and width is 4～8 millimeters.
All be perfused with elastic water-proof embedding sealing in 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 disconnected in the staggered symmetry 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 was provided with 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 plate involved in the present invention, make that the railway roadbed intralamellar part produces, diminish by drawing of causing of variations in temperature, compressive stress, that has avoided that the track continuous structure produced transfinites, exceeds standard and irregular cracks, particularly can avoid the phenomenon that rises at the railway roadbed plate arch that thermal extremes takes place season; Because this track plate allows structure flexible, greatly reduces the stress in the bed board, thereby can reduce the longitudinal reinforcement amount in the plate, compare with continuous track plate, under equal projected life intensity, can save 1/3 or 1/2 amount of reinforcement at least; 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 is provided with dowel bar, limited the shear strain between the plate, the baste place is provided with the continuous or reinforcing bar leap of an amount of reinforcing bar, has limited the shear strain between the plate equally, 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 a structural representation of the present invention.
Fig. 2 adopts the structural representation of individual layer arrangement of reinforcement scheme for the road bed board.
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.
The specific embodiment
The present invention will be described in detail below in conjunction with the specific embodiment.
Non-fragment orbit big unit formula track plate 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 in the flexible baste 7 of supporting bed, the embedding sealing is solidified the back and is formed the elastic body that is adhered in the concrete seam.
Road bed board 3 can adopt C30 or C40 reinforced concrete structure, can be designed to individual layer or the double-deck reinforcing bar of laying, and also can be designed to the unreinforced structure, when claimed structure is not shorter than 50 years application life, adopts double steel bar; Life requirements was adopted the individual layer reinforcing bar between 30～50 years; Life-span can not establish reinforcing bar, but plate thickness should be adopted higher limit during less than 30 years.With plate is long 19.5 meters, plate is wide 2.8 meters, the road bed board 3 of 0.24～0.30 meter of thickness of slab is as a big unit, be laid on the upper surface of supporting bed 2, form bed board flexible true seam 5 in road between two big units, also vertical with orbital direction.Between the flexible true seam 5 of adjacent two road bed boards dowel bar 8 is set, lower floor's filled polyethylene cystosepiment of dowel bar 8 between seam, upper strata perfusion waterproof embedding sealing.Dowel bar 8 is gone up the sheathed bonding sheath that has or not for there not being bonding protective-cover type dowel bar, and the flexible slippage end of dowel bar 8 is set in the sleeve cap, and is provided with packed layer between the two.Dowel bar 8 makes the flexible true seam 5 both sides concrete structures of bed board can transmit shear stress mutually.Between the flexible true seam 5 of upper surface, the road bed board of road bed board 3, every 3.9 meters flexible bastes 6 of road bed board that setting is vertical with orbital direction, by template moulding or construction back sawing, the degree of depth is 1/4 of bed board 3 thickness in the time of can constructing, and width is 4～8 millimeters.Bed board flexible true seam 5 in road is corresponding with the flexible baste 7 of supporting bed respectively with the flexible baste 6 of road bed board.Same perfusion waterproof embedding sealing in the flexible baste 6 of road bed board, the embedding sealing is solidified the back and is formed the elastic body that is adhered in the concrete seam.When blocking the way bed board 3 adopted up and down double-deck arrangement of reinforcement, the upper strata longitudinal reinforcement disconnected at flexible baste 6 places of road bed board, and lower floor's reinforcing bar does not disconnect; When blocking the way bed board 3 is intermediate layer individual layer arrangement of reinforcement, longitudinal reinforcement is crossed over the flexible baste 6 of road bed board, and in the staggered symmetry disconnection in flexible baste 6 both sides of road bed board, referring to Fig. 2, gap is 250mm to 300mm apart from the flexible baste 6 of road bed board, and the reinforcing bar of crossing over the flexible baste 6 of road bed board partly wraps up layer of plastic film or pitching, makes to cross over partly and can slide in concrete, can bear shearing action simultaneously; During blocking the way bed board 3 unreinforceds, flexible baste 6 places are provided with vertical bar dowel at the road bed board, and bar dowel one end is fixed in the bed board, and other end parcel layer of plastic film or pitching can slide it in the road bed board, play the effect of dowel bar.
Sleeper 4 is embedded in bed board 3 tops, and profile can be set to one piece, double-block type or bolster formula, can be designed to C50 or C60 reinforced concrete structure according to force request, can be designed to 550mm to 750mm along the longitudinal pitch of track according to the track Force Calculation.Sleeper bottom or side have the reinforcing bar or the railway roadbed board concrete that stretch out and are connected.The position of sleeper 4 is not overlapping with the flexible baste 6 of road bed board, and promptly bed board flexible baste 6 in road should be arranged between the sleeper 4.
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, the limited crack that bed board flexible baste 6 weakenings place in road form is squeezed closes, and 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 produced transfinites, exceeds standard and irregular cracks, particularly can avoid playing phenomenon at the railway roadbed plate arch that thermal extremes takes place season.
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 the secure bond between suitable elasticity and enough strong and the 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 the continuous or reinforcing bar leap of an amount of reinforcing bar, has limited the shear strain between the plate equally.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 plate that the present invention relates to allows structure flexible, greatly reduces the bed board internal stress, thereby can reduce the longitudinal reinforcement amount in the plate.Compare with continuous track plate, under equal projected life intensity, can save 1/3 or 1/2 amount of reinforcement at least.
Claims (10)
1. non-fragment orbit big unit formula track plate 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:
Described road bed board (3) is provided with the flexible true seam of penetrating road bed board (5), is provided with bed board flexible baste (6) in some impermeable roads between the flexible true seam of road bed board (5);
The position and sleeper (4) position of the flexible baste (6) of 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 flexible true seam of road bed board (5) and the flexible baste (6) of road bed board.
2. non-fragment orbit big unit formula track plate 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 a supporting bed thickness, and width is 4～8 millimeters.
3. non-fragment orbit big unit formula track plate 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. non-fragment orbit big unit formula track plate 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 a supporting bed thickness, and width is 4～8 millimeters.
5. non-fragment orbit big unit formula track plate according to claim 1 is characterized in that described supporting bed stretches all to be perfused with elastic water-proof embedding sealing in the flexible baste (6) of baste (7) and road bed board.
6. non-fragment orbit big unit formula track plate 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. non-fragment orbit big unit formula track plate 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. according to claim 7, it 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. 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 in the staggered symmetry disconnection 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. according to claim 7, it is characterized in that: when described road bed board (3) adopts the unreinforced structure, locate to be provided with 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102261022A true CN102261022A (en) | 2011-11-30 |
| CN102261022B CN102261022B (en) | 2013-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110113932 Active CN102261022B (en) | 2011-05-04 | 2011-05-04 | Big unit type track slabs of ballastless track |
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| CN (1) | CN102261022B (en) |
Cited By (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 |
Cited By (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 |
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| Publication number | Publication date |
|---|---|
| CN102261022B (en) | 2013-04-03 |
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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. |