CN110258199A - Track structure with stiffness transition under vibration-damping ballast and common railway roadbed and plate - Google Patents
Track structure with stiffness transition under vibration-damping ballast and common railway roadbed and plate Download PDFInfo
- Publication number
- CN110258199A CN110258199A CN201910493434.2A CN201910493434A CN110258199A CN 110258199 A CN110258199 A CN 110258199A CN 201910493434 A CN201910493434 A CN 201910493434A CN 110258199 A CN110258199 A CN 110258199A
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- track bed
- damping
- rigidity
- track
- transition
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Links
- 238000013016 damping Methods 0.000 title claims abstract description 90
- 230000007704 transition Effects 0.000 title claims abstract description 62
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 53
- 229910052742 iron Inorganic materials 0.000 claims description 27
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 230000009467 reduction Effects 0.000 claims description 15
- 239000004033 plastic Substances 0.000 claims description 8
- 239000000758 substrate Substances 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 230000008859 change Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000001133 acceleration Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Railway Tracks (AREA)
Abstract
The invention discloses a kind of track structures with stiffness transition under vibration-damping ballast and common railway roadbed and plate, common railway roadbed location, transition location and vibration-damping ballast location are longitudinally divided into along route, the common railway roadbed location includes common railway roadbed (6), the common railway roadbed (6) includes solid concrete roabed (1), the vibration-damping ballast location includes substrate (5), the vibration-damping ballast (3) in the substrate (5), and the cushion layer (4) being set between the substrate (5) and vibration-damping ballast (3)；The transition location is equipped with multi-level damping bed course spring and constitutes stiffness transition structure, and from common railway roadbed location to vibration-damping ballast location, the rigidity of cushion layer springs at different levels is gradually reduced.Structure of the invention, changeover portion plate underlay panel stiffness classification setting, by adjusting the gentle transition close to the rigidity of one or more cushion blocking floating plate lower part cushion layer of common railway roadbed into realization rigidity.
Description
Technical Field
The invention belongs to the technical field of vibration reduction of subway line tracks, and particularly relates to a track structure of a subway line with a vibration reduction track bed, a common track bed and rigidity transition under a slab.
Background
From the 50 s in the 20 th century to the present, urban rail transit has a development course of nearly 60 years in China. By the end of 2017, urban rail transit is opened and put into operation in 34 total cities in China, 165 urban rail transit lines are opened, and the length of the operation lines reaches 5033 kilometers. With the continuous development of urban rail transit, the vibration problem caused by rail transit has more and more influence on people.
In order to meet the requirement of urban environment on traffic vibration control, a large number of rail vibration reduction measures are adopted on a subway line, and a vibration reduction pad floating plate is one of more applications. The damping pad floating slab needs to be embedded with a low-rigidity rubber cushion layer under the slab, so that the difference between the track rigidity of the damping pad floating slab and the track bed section is larger. In order to prevent the vehicle from track damage caused by sudden change of wheel-rail force and large change rate of rail deflection, the vibration-damping and non-vibration-damping transition section is required to be arranged to realize smooth transition of rigidity.
Disclosure of Invention
Aiming at the defects or improvement requirements of the prior art, the invention provides a track structure with a vibration-damping track bed, a common track bed and rigidity transition under plates, according to wheel set displacement, steel rail deflection change rate, vehicle body acceleration and wheel load shedding rate which are obtained by calculation under different rigidity transition modes under plates, rigidity of a pad under a transition section plate is arranged in a grading manner, rigidity transition is realized by adjusting rigidity of vibration-damping pads under one or more vibration-damping pad floating plates close to the common track bed, and the transition effect is good.
In order to achieve the above object, the present invention provides a track structure with a vibration-damping track bed, a common track bed and an underfloor rigidity transition, which is divided into a common track bed section, a transition section and a vibration-damping track bed section along a longitudinal direction of a route,
the common track bed section comprises a common track bed, the common track bed comprises an integral track bed, and the integral track bed is connected with a steel rail arranged at the top of the integral track bed through a fastener;
the vibration reduction ballast bed section comprises a substrate, a vibration reduction ballast bed arranged on the substrate and a vibration reduction cushion layer arranged between the substrate and the vibration reduction ballast bed;
the transition section is provided with a plurality of stages of damping cushion layer springs to form a rigidity transition structure, and the rigidity of each stage of damping cushion layer springs is gradually reduced from the common track bed section to the damping track bed section, so that the rigidity of the common track bed section and the damping track bed section is smoothly transited.
Further, the stiffness transition structure comprises a first stage damping cushion spring, a second stage damping cushion spring and a third stage damping cushion spring; wherein,
the rigidity of the third-stage damping cushion spring is greater than that of the second-stage damping cushion spring;
the rigidity of the second-stage damping cushion spring is greater than that of the first-stage damping cushion spring.
Further, the rigidity transition structure comprises a first rubber cushion layer, a second rubber cushion layer and a third rubber cushion layer.
Further, when the rigidity of any one stage of rubber cushion layer is 20MPa/m or below, the rigidity of the next stage of rubber cushion layer is 1.5 times that of the previous stage;
when the rigidity of any one stage of rubber cushion layer is more than 20MPa/m, the rigidity of the next stage of rubber cushion layer is 2-2.5 times that of the previous stage.
Furthermore, the length of each rubber cushion layer is equal to that of one ballast bed plate, and the rigidity of the last rubber cushion layer is not less than 200 MPa/m.
Furthermore, the base is connected with the upper damping track bed through a damping cushion spring, and the damping track bed is connected with the steel rail through a fastener.
Further, the fastener is located on cast-in-place or prefabricated railway roadbed, including the base plate, the rail is located on the base plate, its bottom is equipped with high-elastic backing plate under the rail in proper order, iron tie plate and iron tie plate height-adjusting backing plate down, through high-elastic backing plate under the rail, iron tie plate and iron tie plate height-adjusting backing plate realize the multistage regulation to rail face elevation down.
Furthermore, mounting holes are formed in the base plate and the cast-in-place gate bed, and plastic sleeves are sleeved in the mounting holes;
and distance adjusting buckle plates are symmetrically arranged on two sides of the bottom of the steel rail respectively, and a gap is reserved between the distance adjusting buckle plates and the high-elastic base plate under the steel rail and used for installing the insulating gauge plate.
Furthermore, the top of insulating gauge board and roll adjustment buckle is equipped with single toe bullet strip, and the bolt passes single toe bullet strip, roll adjustment buckle, iron base plate in proper order, and the high-elastic backing plate under the iron base plate fastens with the plastic sleeve rotation cooperation.
Furthermore, a flat washer and a heavy spring washer are arranged between the distance-adjusting buckle plate and the single-toe elastic strip.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
1. according to the track structure, the rigidity of the lower cushion plates of the transition section plates is arranged in a grading manner according to wheel set displacement, steel rail deflection change rate, vehicle body acceleration and wheel load shedding rate which are calculated in the rigidity transition mode under different plates, the rigidity transition is realized by adjusting the rigidity of the lower vibration damping cushion layers of one or more vibration damping cushion floating plates close to a common track bed, and the transition effect is good.
2. According to the track structure, the multistage damping cushion layer springs are arranged between the common track bed section and the damping track bed section to form the transition section, and the rigidity of each stage of damping cushion layer springs is gradually reduced from the common track bed section to the damping track bed section, so that the rigidity of the common track bed section and the damping track bed section is smoothly transited, and the transition effect is good.
3. According to the track structure, when the rigidity of the underlayer surface under the slab is 20MPa/m or below, the rigidity of the later stage is 1.5 times that of the former stage, and when the rigidity of the underlayer surface is more than 20MPa/m, the rigidity of the later stage is 2-2.5 times that of the former stage. The transition length of each stage is preferably 1 track bed plate, and the transition rigidity of the last stage is not less than 200 MPa/m.
4. According to the rail structure, the height of the rail surface of the steel rail is flexibly adjusted through multi-stage adjustment of the high-elasticity base plate under the rail, the high-elasticity base plate under the iron base plate and the lower-height base plate under the iron base plate.
5. According to the track structure, the bolt sequentially penetrates through the single-toe elastic strip, the distance-adjusting buckle plate, the iron base plate, the high-elasticity base plate under the iron base plate and the plastic sleeve to be rotationally matched and fastened, so that the steel rail is firmly fixed on the cast-in-place concrete track bed.
Drawings
FIG. 1 is a schematic diagram of a general ballast bed and damping ballast bed arrangement transition mechanics structure in an embodiment of the present invention;
FIG. 2 is a schematic view of a conventional ballast bed according to an embodiment of the present invention;
FIG. 3 is a schematic view of a vibration-damped track bed in an embodiment of the present invention;
FIG. 4 is an enlarged view of the transition structure of FIG. 1;
FIG. 5 is a schematic diagram of a transition structure of the embodiment shown in FIG. 4;
FIG. 6 is a schematic plan view of a fastener structure according to an embodiment of the present invention;
fig. 7 is a schematic sectional view taken along line a-a in fig. 6.
In all the figures, the same reference numerals denote the same features, in particular: 1-integral track bed, 2-tunnel, 3-vibration damping track bed, 4-vibration damping cushion layer, 5-base, 6-common track bed, 7-foundation support spring, 8-foundation support spring restraint, 9-steel rail, 10-fastener, 11-vibration damping cushion layer spring, 12-first stage vibration damping cushion layer spring, 13-second stage vibration damping cushion layer spring, 14-third stage vibration damping cushion layer spring, 15-first rubber cushion layer, 16-second rubber cushion layer and 17-third rubber cushion layer;
101-high-elasticity pad under rail, 102-insulating gauge plate, 103-single-toe elastic strip, 104-screw, 105-flat washer, 106-heavy spring washer, 107-distance adjusting buckle, 108-iron pad, 109-high-elasticity pad under iron pad, 110-plastic sleeve and 111-high-elasticity pad under iron pad.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Fig. 1 is a schematic diagram of a general track bed and damping track bed arrangement transition mechanical structure in an embodiment of the invention, and the track structure includes a common track bed section, a damping track bed section and a transition ground which are longitudinally arranged along a line. And establishing a mechanical model, wherein the common track bed section, the vibration reduction track bed section and the transition ground of the mechanical model respectively comprise a basic supporting spring constraint 8 and a basic supporting spring 7 arranged on the basic supporting spring constraint 8. As shown in fig. 2, the common track bed section includes a tunnel 2 and an integral track bed 1 disposed on the tunnel 2, the integral track bed 1 is provided with a foundation support spring restraint 8, the foundation support spring restraint 8 is provided with a foundation support spring 7, the foundation support spring 7 is provided with a common track bed 6, the foundation support spring 7 and the foundation support spring restraint 8 jointly form a track 2, and the common track bed 6 is connected with an upper steel rail 9 through a fastener 10.
As shown in fig. 3, the vibration damping track bed section includes a base 5 provided in the tunnel 2, a vibration damping track bed 3 provided on the base 5, and a vibration damping cushion layer 4 provided between the base 5 and the vibration damping track bed 3. In the transition section and the damping track bed section, the base 5 and the upper damping track bed 3 are connected through damping cushion springs 11, and the damping track bed 3 and the steel rail 9 are connected through fasteners 10. According to the rigidity transition structure, the length and rigidity of the rigidity transition section under the plate are set according to wheel set displacement, steel rail deflection change rate, vehicle body acceleration and wheel load shedding rate which are calculated under different plate rigidity transition modes, so that all indexes meet requirements, the rigidity of the common track bed section and the vibration reduction track bed section is smoothly transitioned, the transition effect is good, and the setting efficiency is high.
As shown in fig. 4, a stiffness transition structure is further formed by a plurality of stages of damping cushion springs disposed between the common track bed section and the damping track bed section, and the stiffness of each stage of damping cushion spring is gradually reduced from the common track bed section to the damping track bed section. Preferably, the stiffness transition structure comprises a first stage damping cushion spring 12, a second stage damping cushion spring 13 and a third stage damping cushion spring 14, wherein the stiffness of the third stage damping cushion spring 14 is greater than the stiffness of the second stage damping cushion spring 13, and the stiffness of the second stage damping cushion spring 13 is greater than the stiffness of the first stage damping cushion spring 12. According to the rigidity transition structure, the multistage damping cushion layer springs are arranged between the common track bed section and the damping track bed section to form the transition section, and the rigidity of each stage of damping cushion layer springs is gradually reduced from the common track bed section to the damping track bed section, so that the rigidity of the common track bed section and the damping track bed section is smoothly transited, and the transition effect is good.
As shown in fig. 5, which is a schematic view of a transition structure in an embodiment of the present invention, a multi-stage stiffness transition structure is disposed between a common track bed section and a damping track bed section, and specifically includes a first rubber cushion layer 15, a second rubber cushion layer 16, and a third rubber cushion layer 17. When the rigidity of any one stage of rubber cushion layer is 20MPa/m or below, the rigidity of the next stage of rubber cushion layer is 1.5 times that of the previous stage, and when the rigidity of any one stage of rubber cushion layer is more than 20MPa/m, the rigidity of the next stage of rubber cushion layer is 2-2.5 times that of the previous stage. The length of each rubber cushion layer is preferably 1 track bed board, and the rigidity of the last rubber cushion layer is not less than 200 MPa/m. Preferably, the rigidity of the first rubber pad layer 15 is 60MPa/m, the rigidity of the second rubber pad layer 16 is 120MPa/m, and the rigidity of the third rubber pad layer 17 is 240 MPa/m.
As shown in fig. 6 and 7, the fastener 10 is disposed on a cast-in-place or prefabricated track bed, and includes a base plate, wherein mounting holes are disposed on the base plate and the cast-in-place track bed, and a plastic sleeve 110 is sleeved in the mounting holes. On the base plate was located to rail 9, its bottom was established in proper order under the rail high-elastic backing plate 101, iron tie plate 108, under the iron tie plate high-elastic backing plate 109 and the iron tie plate heighten backing plate 111 down, through under the rail high-elastic backing plate 101, under the iron tie plate high-elastic backing plate 109 and the iron tie plate heighten backing plate 111 multi-stage modulation down, realized the nimble regulation of 9 rail face elevations of rail. In addition, distance adjusting buckle plates 107 are symmetrically arranged on two sides of the bottom of the steel rail 9 respectively, a gap is reserved between the distance adjusting buckle plates and the high-elasticity base plate 101 under the steel rail, the distance adjusting buckle plates are used for installing an insulating gauge plate 102, and the insulating gauge plate 102 is of an L-shaped structure and used for pressing the steel rail 9. The tops of the insulating track gauge plate 102 and the distance-adjusting buckle plate 107 are provided with single-toe elastic strips 103, and the bolts 104 sequentially penetrate through the single-toe elastic strips 103, the distance-adjusting buckle plate 107, the iron base plate 108, the high-elastic base plate 109 under the iron base plate and are fastened with the plastic sleeve 110 in a rotating fit mode, so that the steel rail 9 is firmly fixed on the cast-in-place concrete track bed. In addition, in order to further strengthen the connection relationship between the bolt 104 and the cast-in-place concrete track bed, a flat washer 105 and a heavy spring washer 106 are arranged between the distance adjusting buckle plate 107 and the single-toe elastic strip 103. Due to the large rigidity and deformation of the single-toe elastic strip 103, the height adjusting range of the steel rail can be greatly improved, and the elevation requirement of the steel rail is met.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A track structure with vibration-damping ballast bed, common ballast bed and rigidity transition under the slab is divided into a common ballast bed section, a transition section and a vibration-damping ballast bed section along the longitudinal direction of a line, and is characterized in that;
the common track bed section comprises a common track bed (6), the common track bed (6) comprises an integral track bed (1), and the integral track bed (1) is connected with a steel rail (9) arranged at the top of the integral track bed through a fastener (10);
the vibration reduction track bed section comprises a base (5), a vibration reduction track bed (3) arranged on the base (5), and a vibration reduction cushion layer (4) arranged between the base (5) and the vibration reduction track bed (3);
the transition section is provided with a plurality of stages of damping cushion layer springs to form a rigidity transition structure, and the rigidity of each stage of damping cushion layer springs is gradually reduced from the common track bed section to the damping track bed section, so that the rigidity of the common track bed section and the damping track bed section is smoothly transited.
2. The track structure with damped track bed and ordinary track bed and underfloor stiffness transition of claim 1, wherein the stiffness transition structure comprises a first stage damping cushion spring (12), a second stage damping cushion spring (13) and a third stage damping cushion spring (14); wherein,
the rigidity of the third-stage damping cushion spring (14) is greater than that of the second-stage damping cushion spring (13);
the rigidity of the second-stage damping cushion spring (13) is greater than that of the first-stage damping cushion spring (12).
3. Track structure with damped track bed with subbed and subslab stiffness transition according to claim 1 or 2, characterized in that the stiffness transition structure comprises a first rubber cushion layer (15), a second rubber cushion layer (16) and a third rubber cushion layer (17).
4. The track structure with the transition of the rigidity of the damping track bed and the common track bed and the rigidity under the slab as claimed in any one of claims 1 to 3, wherein when the rigidity of any one stage of rubber cushion layer is 20MPa/m or less, the rigidity of the next stage of rubber cushion layer is 1.5 times that of the previous stage;
when the rigidity of any one stage of rubber cushion layer is more than 20MPa/m, the rigidity of the next stage of rubber cushion layer is 2-2.5 times that of the previous stage.
5. The track structure with damped track bed and ordinary track bed and underfloor stiffness transition of any one of claims 1 to 4, wherein each stage of rubber cushion layer has a length equal to that of one track bed slab, and the last stage of rubber cushion layer has a stiffness of not less than 200 MPa/m.
6. Track structure with damped track bed to common track bed and underfloor stiffness transition according to any of claims 1-5, characterized in that the base (5) is connected with the upper damped track bed (3) by damping cushion springs (11), the damped track bed (3) being connected with the rails (9) by fasteners (10).
7. The track structure with vibration-damping track bed and transition of rigidity under ordinary track bed and the slab as claimed in any one of claims 1 to 7, wherein said fastener (10) is disposed on a cast-in-place or prefabricated track bed, including a base plate, said rail (9) is disposed on said base plate, and its bottom portion is sequentially disposed with a high-elastic pad under rail (101), an iron pad (108), a high-elastic pad under iron pad (109) and a high-adjustable pad under iron pad (111), through said high-elastic pad under rail (101), high-elastic pad under iron pad (109) and high-adjustable pad under iron pad (111) to realize multi-level height adjustment of rail surface height of said rail (9).
8. The track structure with the transition of rigidity between the damping track bed and the common track bed as well as below the slab as claimed in any one of claims 1 to 7, wherein the base plate and the current runner bed are both provided with mounting holes, and plastic sleeves (110) are sleeved in the mounting holes;
distance adjusting buckle plates (107) are symmetrically arranged on two sides of the bottom of the steel rail (9) respectively, and a gap is reserved between the distance adjusting buckle plates and the high-elastic base plate (101) under the rail and used for installing the insulating gauge plate (102).
9. The track structure with the transition of the damping track bed and the common track bed and the rigidity under the track bed according to any one of claims 1 to 8, wherein the top of the insulating track gauge plate (102) and the distance adjusting buckle plate (107) is provided with a single-toe elastic strip (103), and a bolt (104) sequentially penetrates through the single-toe elastic strip (103), the distance adjusting buckle plate (107), the iron pad plate (108) and the high-elastic pad plate (109) under the iron pad plate to be fastened with a plastic sleeve (110) in a rotating fit manner.
10. Track structure with damped track bed with stiffness transition to normal track bed and underfloor according to any of claims 1-9, characterized in that between the distance adjusting pinch plate (107) and the single toe spring strip (103) there are also provided a flat washer (105) and a heavy spring washer (106).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910493434.2A CN110258199A (en) | 2019-06-06 | 2019-06-06 | Track structure with stiffness transition under vibration-damping ballast and common railway roadbed and plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910493434.2A CN110258199A (en) | 2019-06-06 | 2019-06-06 | Track structure with stiffness transition under vibration-damping ballast and common railway roadbed and plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110258199A true CN110258199A (en) | 2019-09-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910493434.2A Pending CN110258199A (en) | 2019-06-06 | 2019-06-06 | Track structure with stiffness transition under vibration-damping ballast and common railway roadbed and plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110258199A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111979850A (en) * | 2020-08-18 | 2020-11-24 | 华东交通大学 | Fastener arrangement method and system for controlling vibration of railway transition section |
| CN114956670A (en) * | 2022-05-13 | 2022-08-30 | 东南大学 | Prefabricated epoxy asphalt elastic ballast bed for high-speed railway bridge transition section |
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| CN201785681U (en) * | 2010-07-12 | 2011-04-06 | 中铁工程设计咨询集团有限公司 | Fastening device used for urban rail transit |
| WO2013005126A1 (en) * | 2011-07-06 | 2013-01-10 | Rte Technologie Gmbh | Transition between two track sections |
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2019
- 2019-06-06 CN CN201910493434.2A patent/CN110258199A/en active Pending
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| CN201785681U (en) * | 2010-07-12 | 2011-04-06 | 中铁工程设计咨询集团有限公司 | Fastening device used for urban rail transit |
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| CN111979850A (en) * | 2020-08-18 | 2020-11-24 | 华东交通大学 | Fastener arrangement method and system for controlling vibration of railway transition section |
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| CN114956670A (en) * | 2022-05-13 | 2022-08-30 | 东南大学 | Prefabricated epoxy asphalt elastic ballast bed for high-speed railway bridge transition section |
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