CN210975382U - Prefabricated plate rail structure for urban rail transit overhead line - Google Patents
Prefabricated plate rail structure for urban rail transit overhead line Download PDFInfo
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- CN210975382U CN210975382U CN201921526443.9U CN201921526443U CN210975382U CN 210975382 U CN210975382 U CN 210975382U CN 201921526443 U CN201921526443 U CN 201921526443U CN 210975382 U CN210975382 U CN 210975382U
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Abstract
The utility model discloses a prefabricated plate track structure for urban rail transit overhead line, including laying the prefabricated plate ballast bed on urban rail transit overhead line, the prefabricated plate ballast bed is equipped with the bridge floor embedded bar from bottom to top in proper order, self-compaction concrete adjustment layer, geotechnological cloth isolation layer and prefabricated plate, the vertical both ends that the self-compaction concrete adjustment layer corresponds the prefabricated plate are equipped with one respectively rather than integrative filling fashioned spacing boss, be equipped with the reinforcing bar net in the self-compaction concrete adjustment layer, be equipped with the steel reinforcement cage in the spacing boss, the upper end and the integrative ligature shaping of reinforcing bar cage of reinforcing bar net, the lower extreme and the bridge floor embedded bar of reinforcing bar net link to each other, the vertical both ends of prefabricated plate are equipped with one respectively with spacing hole of spacing prefabricated plate boss complex, the central point of prefabricated plate puts and is equipped with the hole of filling that is used for filling self-compaction concrete. The utility model has the advantages of simple structure, light weight, high strength, good stability, high construction efficiency, convenient maintenance and maintenance, beautiful and environment-friendly.
Description
Technical Field
The utility model relates to an urban rail transit field especially relates to a prefabricated plate track structure for urban rail transit overhead line.
Background
With the rapid development of urban rail transit, lines continuously extend to suburbs of cities, and overhead lines are more and more in suburb lines due to the fact that the construction cost and the operation cost of the overhead lines are greatly lower than those of underground lines. Urban environment has higher landscape requirements on overhead lines, and the bridge structure has small volume, economy, beauty and transparent visual field as far as possible, so compared with a high-speed railway bridge, the urban rail transit bridge has thin bridge piers and light and thin beam bodies, the born bridge deck dead load is limited, and the rail structure needs to be lightened and the bridge deck dead load is reduced as far as possible. The overhead line track structure needs to satisfy light-duty, and also needs to achieve good strength and stability, strong temperature deformation adaptability, convenient construction, convenient operation, maintenance and repair, neat appearance and uniform type.
At present, the overhead line track structure of urban rail transit generally adopts a short sleeper bearing track table type cast-in-place track bed, and a small number of long sleeper type cast-in-place track beds or precast slab track beds are adopted. The short sleeper track supporting platform cast-in-place track bed has lower manufacturing cost and smaller bridge dead load, but the construction process adopts a track erecting method for construction due to the adoption of the short sleeper, the construction progress is slow, the precision is low, the integrity is poorer, and the short sleeper and the cast-in-place track bed are inconvenient to maintain; the long-sleeper type cast-in-situ ballast bed has good integrity and high construction precision, but the bridge has large dead load and cannot meet the light design requirement of the bridge; traditional precast slab ballast bed generally contains concrete foundation bed, self-compaction concrete or CA mortar adjustment layer, isolation layer, structures such as precast slab, for guaranteeing track structure's stability, the prefabricated slab below is reserved door type muscle and is connected with the adjustment layer, it is spacing that the adjustment layer is done the boss downwards simultaneously, the pit … … of boss will be reserved during the basement construction overall, traditional precast slab track structure is complicated, the construction process is loaded down with trivial details, the difficult control of construction quality, maintenance inconvenience, and the bridge constant load is very big, contradict with the light-dutyization trend of bridge.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the prefabricated slab track structure is simple in structure, light in weight, high in strength, good in stability, high in construction efficiency, convenient to maintain and repair, attractive, environment-friendly and very suitable for urban rail transit overhead lines.
In order to solve the technical problem, the utility model provides a precast slab track structure for urban rail transit overhead line, which comprises a steel rail and a precast slab track bed, wherein the precast slab track bed is laid on the urban rail transit overhead line, the precast slab track bed is sequentially provided with a bridge deck embedded rib, a self-compacting concrete adjusting layer, a geotextile isolating layer and a precast slab from bottom to top, the self-compacting concrete adjusting layer is respectively provided with a limit boss corresponding to the longitudinal two ends of the precast slab, the limit boss and the self-compacting concrete adjusting layer are integrally poured and formed, a steel bar mesh is arranged in the self-compacting concrete adjusting layer, a steel bar cage is arranged in the limit boss, the upper end of the steel bar mesh and the steel bar cage are integrally formed, the lower end of the steel bar mesh is connected with the bridge deck embedded rib, the longitudinal two ends of the precast slab are respectively provided with a limit hole matched with the limit boss in shape, the central point of prefabricated plate puts and is used for to the hole of pouring of self-compaction concrete is filled to self-compaction concrete adjustment layer, the geotechnological cloth isolation layer is in be equipped with the hole that the size matches on the position that spacing boss and hole of pouring correspond, the horizontal both sides of prefabricated plate are equipped with a plurality of rail bearing platforms along its vertical equidistance interval respectively, the rail passes through the fastener and detains and press on the rail bearing platform.
As the utility model discloses preferred scheme, the rail bearing platform with the integrative prefabricated forming of prefabricated plate.
As the preferable scheme of the utility model, the width of prefabricated plate is 2100mm, thickness is 200mm, length is 4100 mm.
As the preferred scheme of the utility model, the prefabricated plate is made by reinforced concrete, is equipped with vertical prestressing steel and horizontal prestressing steel in it, is two-way prestressing steel reinforced concrete structure.
As the preferable proposal of the utility model, the compression strength of the precast slab is more than or equal to 60 Mpa.
As the preferred scheme of the utility model, be equipped with the board seam between the adjacent prefabricated plate.
As a preferable aspect of the present invention, the width of the plate seam is greater than or equal to 100 mm.
As the preferred scheme of the utility model, the thickness scope on self-compaction concrete adjustment layer is 80mm ~ 100 mm.
As the preferred proposal of the utility model, the limiting lug boss and the elastic cushion layer are arranged between the limiting holes.
The embodiment of the utility model provides a prefabricated plate track structure for urban rail transit overhead line compares with prior art, and its beneficial effect lies in:
(1) The geotextile isolation layer is arranged between the precast slab and the self-compacting concrete adjustment layer, so that the uneven deformation between the precast slab and the self-compacting concrete can be effectively prevented; and, if the railway roadbed disease happens in the operation process, the precast slab can be conveniently lifted up for maintenance or replacement, the integrity of the track structure of the precast slab cannot be damaged, and the maintenance is convenient.
(2) The self-compacting concrete adjusting layer and the limiting boss are formed simultaneously, so that the construction efficiency and the construction quality are greatly improved; in addition, the upper end of the reinforcing mesh in the self-compacting concrete adjusting layer and the reinforcing cage in the limiting boss are integrally bound and formed, and the lower end of the reinforcing mesh is connected with the bridge deck embedded rib, so that the track structure of the precast slab has good overall stability and high strength.
(3) Compared with the traditional precast slab track bed, the precast slab track structure has the advantages that the concrete foundation layer is reduced, the height of the track structure can be designed to be lower (such as 540mm), the single-line dead load of the precast slab track on the traditional bridge is reduced by 30%, the dead load is only slightly higher than that of the traditional short sleeper bearing track platform cast-in-place track bed, and the lightweight is easy to realize.
(4) The prefabricated slab track structure is neat and uniform in appearance, can form an attractive track landscape line when being laid on a viaduct, and meets the landscape requirement of urban environment on the viaduct line.
It can be seen that the utility model discloses prefabricated plate track structure has simple structure, the quality is light, intensity is high, stability is good, the efficiency of construction is high, the maintenance is convenient, the advantage of pleasing to the eye environmental protection, is particularly suitable for in urban rail transit overhead line application and popularization, and its engineering cost reduces 25% than traditional prefabricated plate, has good social economic effect.
Drawings
Fig. 1 is a cross-sectional view of a prefabricated slab track structure for an overhead line of urban rail transit according to an embodiment of the present invention;
Fig. 2 is a plan view of a prefabricated slab track structure for an overhead line of urban rail transit according to an embodiment of the present invention;
In the figure, 1, a steel rail; 2. embedding ribs in the bridge deck; 3. a self-compacting concrete adjustment layer; 4. a geotextile isolation layer; 5. prefabricating a slab; 6. a limiting boss; 7. a reinforcing mesh; 8. a reinforcement cage; 9. a limiting hole; 10. a perfusion hole; 11. plate sewing; 12. an elastic cushion layer; 13. a rail bearing platform; 14. a fastener.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, which indicate the orientation or positional relationship, are used in the present invention as being based on the orientation or positional relationship shown in the drawings, and are used only for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be understood that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are used in a generic sense, e.g., fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 and 2, in a preferred embodiment of the present invention, a precast slab track structure for an overhead line of urban rail transit comprises a steel rail 1 and a precast slab track bed, wherein the precast slab track bed is laid on the overhead line of urban rail transit, the precast slab track bed is sequentially provided with a bridge deck embedded rib 2, a self-compacting concrete adjusting layer 3, a geotextile isolating layer 4 and a precast slab 5 from bottom to top, the self-compacting concrete adjusting layer 3 is respectively provided with a limiting boss 6 corresponding to the longitudinal ends of the precast slab 5, the limiting boss 6 is integrally cast and formed with the self-compacting concrete adjusting layer 3, a steel bar mesh 7 is provided in the self-compacting concrete adjusting layer 3, a steel bar cage 8 is provided in the limiting boss 6, the upper end of the steel bar mesh 7 is integrally bound and formed with the steel bar cage 8, the lower end of the steel bar mesh 7 is connected with the bridge deck embedded rib 2, the vertical both ends of prefabricated plate 5 be equipped with respectively one with spacing boss 6 shape complex spacing hole 9, the central point of prefabricated plate 5 puts and is used for to the hole 10 that pours into self-compaction concrete of self-compaction concrete adjustment layer 3, geotechnological cloth isolation layer 4 is in be equipped with the hole that the size matches on the position that spacing boss 6 and hole 10 correspond, the horizontal both sides of prefabricated plate 5 are equipped with a plurality of rail bearing platforms 13 along its vertical equidistance interval respectively, rail 1 is withheld through fastener 14 on the rail bearing platform 13.
Implement the embodiment of the utility model provides a prefabricated plate track structure for urban rail transit overhead line, its key lies in: firstly, the geotextile isolating layer 4 is arranged between the precast slab 5 and the self-compacting concrete adjusting layer 3, so that the uneven deformation between the precast slab and the self-compacting concrete can be effectively prevented, and the precast slab is attractive and environment-friendly; in addition, if a ballast bed defect occurs in the operation process, the precast slab 5 can be conveniently lifted for maintenance or replacement, the integrity of the track structure of the precast slab cannot be damaged, and the maintenance is convenient. Secondly, the limiting lug boss 6 formed in the limiting hole 9 of the precast slab during the self-compacting concrete pouring is utilized, so that the transverse and longitudinal limiting of the track is realized, and the self-compacting concrete adjusting layer 3 and the limiting lug boss 6 are simultaneously formed, so that the construction efficiency and the construction quality are greatly improved; in addition, the upper end of the reinforcing mesh 7 in the self-compacting concrete adjusting layer 3 and the reinforcing cage 8 in the limiting boss 6 are integrally bound and formed, and the lower end of the reinforcing mesh 7 is connected with the bridge deck embedded rib 2, so that the track structure of the precast slab has good overall stability and high strength. Thirdly, the utility model discloses prefabricated plate track structure compares traditional prefabricated plate railway roadbed and has subtracted concrete foundation layer, and track structure height can design lower (like 540mm), has reduced 30% than the orbital single line dead load of prefabricated plate on traditional bridge, only slightly is higher than traditional short sleeper support track platform 13 cast-in-place railway roadbed dead load, easily realizes the lightweight.
Illustratively, the rail bearing platform 13 is prefabricated and formed integrally with the prefabricated slab. The prefabricated plate 5 is 2100mm wide, 200mm thick and 4100mm long, the limiting hole 9 is a circular hole with a diameter of 360mm, and the pouring hole 10 is a circular hole with a diameter of 180 mm. As the width and thickness of the prefabricated slab 5 are minimized, the weight of a standard prefabricated slab is only 4305kg, which is less than that of the traditional prefabricated slab with the same length (the thickness is 220mm, the width is 2400mm, and the weight is about 5400 kg). The prefabricated slab 5 is made of reinforced concrete, longitudinal prestressed reinforcements and transverse prestressed reinforcements are arranged in the prefabricated slab, the prefabricated slab is of a bidirectional prestressed reinforced concrete structure, and the compressive strength of the prefabricated slab 5 is greater than or equal to 60Mpa, so that sufficient strength is guaranteed while light weight of the prefabricated slab is realized, and the stress requirement of the prefabricated slab under dynamic load of a train is met.
Illustratively, plate seams 11 are arranged between adjacent prefabricated plates 5. The arrangement of the plate seams 11 is used for adapting to the temperature expansion and self deformation of the beam body, and meanwhile, the bottom of the plate seams 11 is the bridge deck, so the plate seams 11 can be used as a channel for a drainage bridge deck to transversely pass through a water channel and a track passing pipeline, so that the water accumulation of the bridge deck outside the track of the curve section is avoided, track passing grooves do not need to be reserved in the precast slabs 5, and the strength and the integrity of the track structure are guaranteed. Preferably, the width of the plate seam 11 is greater than or equal to 100 mm.
Illustratively, the thickness of the self-compacting concrete adjustment layer 3 is in the range of 80mm to 100mm, preferably 90mm, in order to prevent the drainage of the bridge deck from penetrating into the geotextile isolation layer 4 and to ensure the drying of the inside of the ballast bed.
Illustratively, an elastic cushion layer 12 is arranged between the limiting boss 6 and the limiting hole 9 and is used for isolating and buffering the rigid contact between the limiting boss 6 and the precast slab 5.
The utility model discloses prefabricated plate track structure, its construction procedure is: firstly, cleaning the bridge deck before paving the rails to ensure that sundries, broken stones or dust are not left on the bridge deck except for the bridge deck embedded ribs 2; secondly, binding a reinforcing mesh 7 of the self-compacting concrete adjusting layer 3, and connecting the reinforcing mesh 7 with the bridge deck embedded ribs 2; thirdly, transporting the precast slabs 5 to a bridge, erecting and finely adjusting the precast slabs 5 in place, and sealing the periphery of the self-compacting concrete adjusting layer 3 by using a steel template to ensure that no slurry leaks when the self-compacting concrete is poured; fourthly, binding a reinforcement cage 8 in the limiting boss 6, and firmly connecting the reinforcement cage 8 with a reinforcement mesh 7 of the self-compacting concrete adjusting layer 3; fifthly, transporting the self-compacting concrete to the site, pouring the self-compacting concrete from the pouring hole 10, and slowly pouring the self-compacting concrete until the self-compacting concrete in the hole of the limiting boss 6 is about to overflow the surface of the precast slab 5; sixthly, removing the template after the self-compacting concrete is initially set, and arranging an elastic cushion layer 12 around the limiting boss 6; seventhly, mounting a fastener 14 on a rail bearing platform 13 of the precast slab 5; eighthly, laying the steel rail 1, and fixing the steel rail 1 on the rail bearing platform 13 by using a fastener 14; and finally, finely adjusting the steel rail 1 to ensure that the geometric shape and position of the precast slab track structure meet the design requirements.
To sum up, the utility model discloses prefabricated plate track structure has simple structure, the quality is light, intensity is high, stability is good, the efficiency of construction is high, the maintenance is convenient, the advantage of pleasing to the eye environmental protection, is particularly suitable for in urban rail transit overhead line application and popularization, and its engineering cost reduces 25% than traditional prefabricated plate, has good social economic effect.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (9)
1. A precast slab track structure for an urban rail transit overhead line is characterized by comprising steel rails and a precast slab track bed, wherein the precast slab track bed is laid on the urban rail transit overhead line and is sequentially provided with a bridge deck embedded rib, a self-compacting concrete adjusting layer, a geotextile isolating layer and a precast slab from bottom to top, the self-compacting concrete adjusting layer is respectively provided with a limiting boss corresponding to the longitudinal two ends of the precast slab, the limiting boss and the self-compacting concrete adjusting layer are integrally poured and formed, a steel bar mesh is arranged in the self-compacting concrete adjusting layer, a steel bar cage is arranged in the limiting boss, the upper end of the steel bar mesh and the steel bar cage are integrally bound and formed, the lower end of the steel bar mesh is connected with the bridge deck embedded rib, and the longitudinal two ends of the precast slab are respectively provided with a limiting hole matched with the limiting boss in shape, the central point of prefabricated plate puts and is used for to the hole of pouring of self-compaction concrete is filled to self-compaction concrete adjustment layer, the geotechnological cloth isolation layer is in be equipped with the hole that the size matches on the position that spacing boss and hole of pouring correspond, the horizontal both sides of prefabricated plate are equipped with a plurality of rail bearing platforms along its vertical equidistance interval respectively, the rail passes through the fastener and detains and press on the rail bearing platform.
2. The precast slab track structure for an urban rail transit overhead line according to claim 1, wherein the rail support platform is precast-molded integrally with the precast slab.
3. A prefabricated panel track structure for an overhead line of urban rail transit according to claim 2, wherein said prefabricated panel has a width of 2100mm, a thickness of 200mm and a length of 4100 mm.
4. The precast slab track structure for an urban rail transit overhead line according to claim 2, wherein the precast slab is made of reinforced concrete with longitudinal and transverse prestressed reinforcements provided therein, and is a bidirectional prestressed reinforced concrete structure.
5. The precast slab track structure for an urban rail transit overhead line according to claim 4, wherein the compressive strength of the precast slab is greater than or equal to 60 MPa.
6. The precast slab track structure for an urban rail transit overhead line according to claim 1, wherein slab joints are provided between adjacent precast slabs.
7. A prefabricated panel track structure for an urban rail transit overhead line according to claim 6, wherein the width of said panel gap is greater than or equal to 100 mm.
8. The precast slab track structure for an urban rail transit overhead line according to claim 1, wherein the thickness of the self-compacting concrete adjustment layer ranges from 80mm to 100 mm.
9. The precast slab track structure for the urban rail transit overhead line according to any one of claims 1 to 8, wherein an elastic cushion layer is provided between the limiting boss and the limiting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921526443.9U CN210975382U (en) | 2019-09-09 | 2019-09-09 | Prefabricated plate rail structure for urban rail transit overhead line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921526443.9U CN210975382U (en) | 2019-09-09 | 2019-09-09 | Prefabricated plate rail structure for urban rail transit overhead line |
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| CN210975382U true CN210975382U (en) | 2020-07-10 |
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| CN201921526443.9U Active CN210975382U (en) | 2019-09-09 | 2019-09-09 | Prefabricated plate rail structure for urban rail transit overhead line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112239967A (en) * | 2020-08-24 | 2021-01-19 | 中铁工程设计咨询集团有限公司 | Assembled two-square-hole convex limiting track system |
-
2019
- 2019-09-09 CN CN201921526443.9U patent/CN210975382U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112239967A (en) * | 2020-08-24 | 2021-01-19 | 中铁工程设计咨询集团有限公司 | Assembled two-square-hole convex limiting track system |
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