CN210621347U - Prefabricated roadbed structure of vibration isolation pad on bridge - Google Patents
Prefabricated roadbed structure of vibration isolation pad on bridge Download PDFInfo
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- CN210621347U CN210621347U CN201921391688.5U CN201921391688U CN210621347U CN 210621347 U CN210621347 U CN 210621347U CN 201921391688 U CN201921391688 U CN 201921391688U CN 210621347 U CN210621347 U CN 210621347U
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Abstract
The utility model discloses a prefabricated railway roadbed structure of vibration isolator on bridge, including laying the prefabricated track board on the bridge, the fixed vibration isolator that is equipped with in prefabricated track board below, be provided with the adjustment layer between vibration isolator and the bridge face, be equipped with the filling hole and the spacing hole that run through on the prefabricated track board, the inner wall of filling hole and spacing hole is equipped with the elastic cushion layer, spacing downthehole spacing boss that is equipped with, spacing boss with the adjustment layer is the integrated into one piece structure. The utility model discloses a set up the vibration isolator below prefabricated track board, and the inner wall of filling hole and spacing hole is equipped with the elastic cushion layer, is equipped with spacing boss in spacing downthehole, resists the rail force when the train moves, can guarantee again that prefabricated track board does not take place the rigidity contact with spacing boss, reduces the vibration that produces when the train moves, compares with cast-in-place railway roadbed structure, and its efficiency of construction is high, practices thrift more construction manpower, and construction quality is reliable and stable.
Description
Technical Field
The utility model relates to a track traffic technical field, concretely relates to prefabricated roadbed structure of vibration isolator on bridge.
Background
Many urban rail transit overhead lines in China pass through urban areas, and residences along the lines are dense, so that the influence of noise and vibration on surrounding residents is reduced. Vibration isolation cushion track beds are adopted on some urban rail transit bridges to reduce the propagation of train running vibration to the periphery. The existing vibration isolation pad ballast bed on the bridge is of a cast-in-place structure, needs to consume a large amount of manpower, is limited by the proficiency of manual operation, and has the disadvantages of slow construction progress, poor precision, poor ballast bed quality and more ballast bed diseases during operation. The existing prefabricated ballast bed structure is generally adopted in a tunnel, is complex in structure, needs to be provided with an independent adjusting layer, a base layer and a limiting device, is complex in ballast bed structure, large in thickness, heavy in self weight, multiple in construction procedures and not suitable for bridge structures.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at: the prefabricated roadbed structure of vibration isolation pad on bridge can effectively reduce train operation vibration, and compare with cast-in-place roadbed structure, the efficiency of construction is high, practices thrift the construction manpower, and construction quality is reliable and stable.
In order to realize the purpose, the utility model discloses a technical scheme be:
the utility model provides a prefabricated railway roadbed structure of vibration isolator on bridge, is including laying the prefabricated track board on the bridge, the fixed vibration isolator that is equipped with in prefabricated track board below, be provided with the adjustment layer between vibration isolator and the bridge face, be equipped with the filling hole and the spacing hole that run through on the prefabricated track board, the inner wall of filling hole and spacing hole is equipped with the elastic buffer bed course, spacing downthehole spacing boss that is equipped with, spacing boss with the adjustment layer is the integrated into one piece structure.
The utility model can effectively reduce the vertical vibration generated during the running of the train by arranging the vibration isolation pad below the prefabricated track slab, the adjusting layer is arranged between the vibration isolation pad and the bridge deck and is formed by adopting self-compacting concrete casting after the prefabricated track slab is adjusted in place, the prefabricated track slab is provided with the through filling hole and the limiting hole, the inner walls of the filling hole and the limiting hole are provided with the elastic buffer cushion layer, the limiting hole is internally provided with the limiting boss, and the limiting boss and the adjusting layer are of an integrated structure, thereby not only being capable of resisting the track force generated during the running of the train, but also being capable of ensuring that the prefabricated track slab does not rigidly contact with the limiting boss, leading the prefabricated track slab to freely vibrate, reducing the transverse vibration generated during the running of the train, effectively reducing the running vibration of the train by adopting the prefabricated track bed structure, and being higher in construction efficiency compared with the cast-in-place track bed structure, saves more construction manpower and has stable and reliable construction quality.
As the utility model discloses an optimal scheme, the filling hole is big end down's toper structure with spacing hole, the elastic cushion layer is the toper structure of upper thin thickness down, and the elastic cushion layer inner wall is vertical. Through adopting above-mentioned scheme, can guarantee on the one hand that the elastic cushion layer can not scurry gradually under the repeated vibration condition of prefabricated track board, on the other hand can guarantee that the elastic cushion layer does not produce compressive deformation in advance in the vibration isolator, and the elasticity of full play vibration isolator also is convenient for lift by crane prefabricated track board simultaneously, and then realizes the vibration isolator fast and change.
As the preferred scheme of the utility model, the vibration isolator is rubber materials or foaming polyurethane material, has certain elasticity, can realize the damping function.
As the preferred scheme of the utility model, the elastic cushion layer is the EPT rubber, has certain elasticity, can realize the isolation function.
As the utility model discloses an optimal scheme, fill the axle center of hole and spacing hole with prefabricated track board central line coincidence to make and fill hole and spacing hole site in prefabricated track board center, be favorable to making prefabricated track board atress balanced when the train operation.
As the utility model discloses a preferred scheme, spacing hole is two, it is one and is located between two spacing holes to fill the hole. Adopt two spacing holes can carry on spacingly to prefabricated track board better, avoid prefabricated track board to take place great skew when the train moves, and will pour the hole and be located between two spacing holes, self-compaction concrete is equivalent to both sides flow distance when pouring to the effect is pour in better assurance.
As the utility model discloses a preferred scheme, be equipped with the rail bearing platform that is used for installing the rail on the prefabricated track board.
As the preferred scheme of the utility model, the bridge is box girder or U type roof beam.
As the utility model discloses an optimal scheme, be equipped with on the bridge with the embedded bar that the adjustment layer links to each other to realize the inseparable combination on bridge and self-compaction concrete adjustment layer.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the utility model can effectively reduce the vertical vibration generated when the train runs by arranging the vibration isolation pad below the prefabricated track slab, the adjusting layer is arranged between the vibration isolation pad and the bridge deck, the adjusting layer is formed by adopting self-compacting concrete casting after the prefabricated track slab is adjusted in place, the prefabricated track slab is provided with the through filling hole and the limiting hole, the inner walls of the filling hole and the limiting hole are provided with the elastic buffer cushion layer, the limiting boss is arranged in the limiting hole, and the limiting boss and the adjusting layer are in an integrated structure, thereby not only being capable of resisting the track force generated when the train runs, but also being capable of ensuring that the prefabricated track slab does not rigidly contact with the limiting boss, leading the prefabricated track slab to freely vibrate, reducing the transverse vibration generated when the train runs, effectively reducing the train running vibration by adopting the prefabricated track bed structure and being compared with a cast-in-place track bed structure, the construction efficiency is high, more construction manpower is saved, and the construction quality is stable and reliable;
2. through making the hole of filling and spacing hole for big end down's toper structure, the elastic cushion layer is the toper structure of upper-thin thick end down, and the elastic cushion layer inner wall is vertical, can guarantee on the one hand that the elastic cushion layer can not scurry gradually under the repeated vibration condition of prefabricated track board, on the other hand can guarantee that the elastic cushion layer does not produce compressive deformation in advance in the vibration isolator, the elasticity of full play vibration isolator, also be convenient for simultaneously lift by crane prefabricated track board, and then realize the vibration isolator fast and change.
Drawings
Fig. 1 is a top view of the prefabricated track bed structure of the vibration isolation pad on the bridge of the present invention.
Fig. 2 is a sectional view (box beam) a-a in fig. 1.
Fig. 3 is a sectional view (box beam) taken along line B-B in fig. 1.
Fig. 4 is a cross-sectional view (U-beam) a-a in fig. 1.
Fig. 5 is a cross-sectional view (U-beam) taken along line B-B of fig. 1.
Fig. 6 is a partial sectional view of the position of the limit boss.
The labels in the figure are: the method comprises the following steps of 1-prefabricating a track slab, 2-vibration isolating pads, 3-adjusting layers, 4-pouring holes, 5-limiting holes, 6-elastic buffer cushion layers, 7-limiting bosses, 8-rail bearing platforms, 9-steel rails, 10-box-shaped beams, 11-U-shaped beams and 12-embedded steel bars.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Examples
The embodiment provides a prefabricated track bed structure of a vibration isolation pad on a bridge;
as shown in fig. 1 to 6, the prefabricated track bed structure of the vibration isolator on the bridge in the embodiment includes a prefabricated track slab 1 laid on the bridge, the prefabricated track slab is a bidirectional prestressed reinforced concrete structure (i.e., prestress is applied along the transverse direction and the longitudinal direction of the prefabricated track slab), the vibration isolator 2 is fixedly arranged below the prefabricated track slab 1, an adjusting layer 3 is arranged between the vibration isolator 2 and the bridge surface, a through filling hole 4 and a through limiting hole 5 are arranged on the prefabricated track slab 1, elastic buffer cushions 6 are arranged on the inner walls of the filling hole 4 and the limiting hole 5, a limiting boss 7 is arranged in the limiting hole 5, and the limiting boss 7 and the adjusting layer 3 are of an integrally formed structure.
The utility model can effectively reduce the vertical vibration generated when the train runs by arranging the vibration isolation pad below the prefabricated track slab, the adjusting layer is arranged between the vibration isolation pad and the bridge deck and is formed by adopting self-compacting concrete casting after the prefabricated track slab is adjusted in place, thereby reducing a large amount of manpower and material resources consumed by cast-in-place concrete construction, the prefabricated track slab is provided with the through filling hole and the limiting hole, the inner walls of the filling hole and the limiting hole are provided with the elastic buffer cushion layer, the limiting boss is arranged in the limiting hole, and the limiting boss and the adjusting layer are of an integrated structure, thereby not only being capable of resisting the track force generated when the train runs, but also being capable of ensuring that the prefabricated track slab does not rigidly contact with the limiting boss, leading the prefabricated track slab to freely vibrate and reducing the transverse vibration generated when the train runs, and effectively reducing the train running vibration by adopting the prefabricated track bed structure, compared with a cast-in-place ballast bed structure, the construction efficiency is high, more construction manpower is saved, and the construction quality is stable and reliable.
In this embodiment, the filling hole 4 and the limiting hole 5 are tapered structures with a small upper part and a large lower part, the elastic cushion layer 6 is a tapered structure with a thin upper part and a thick lower part, and the inner wall of the elastic cushion layer is vertical. Through adopting above-mentioned scheme, can guarantee on the one hand that the elastic cushion layer can not scurry gradually under the repeated vibration condition of prefabricated track board, on the other hand can guarantee that the elastic cushion layer does not produce compressive deformation in advance in the vibration isolator, and the elasticity of full play vibration isolator also is convenient for lift by crane prefabricated track board simultaneously, and then realizes the vibration isolator fast and change.
In this embodiment, the vibration isolator 2 is made of rubber material or foamed polyurethane material, and can be bonded below the prefabricated track slab in a prefabrication plant or on site, so that the vibration isolator has good elasticity, can realize the functions of vibration reduction and noise reduction, and reduces a large amount of manpower and material resources consumed by laying the vibration isolator on site and leveling.
In this embodiment, the elastic cushion layer 6 is made of ethylene propylene diene monomer, and the elastic cushion layer is bonded to the inner walls of the filling hole and the limiting hole, has certain elasticity, and can realize an isolation function.
In this embodiment, the axes of the pouring hole 4 and the limiting hole 5 coincide with the central line of the prefabricated track slab 1, so that the pouring hole and the limiting hole are located in the center of the prefabricated track slab, and the prefabricated track slab is beneficial to stress balance when a train runs. Because prefabricated track board 1 is reserved with filling hole 4 and spacing hole 5, realizes adjusting layer 3, spacing boss 7 integrated into one piece through filling self-compaction concrete, forms spacingly, and this railway roadbed simple structure, the dead weight is lighter, and the construction progress is fast, is particularly suitable for the overhead line construction.
In this embodiment, the two limiting holes 5 are symmetrically arranged, and the filling hole 4 is one and is located between the two limiting holes 5. The two limiting holes can better limit the prefabricated track plate, and the prefabricated track plate is prevented from being greatly deviated when a train runs.
In this embodiment, the prefabricated track slab 1 is provided with a rail bearing platform 8 for installing a rail 9, and the rail 9 is fixed on the rail bearing platform 8 through a fastener.
In this embodiment, the bridge is a box beam 10 or a U-shaped beam 11.
In this embodiment, be equipped with on the bridge with the embedded bar 12 that adjusting layer 3 links to each other to realize the close coupling of bridge and the self-compaction concrete adjusting layer after pouring.
In this embodiment, prefabricated track slab 1 is after the prefabrication is accomplished in the mill, and direct transportation is to the construction site, and the hoist is installed on the bridge. And after the prefabricated track slab 1 is finely adjusted on site, self-compacting concrete is poured from the pouring hole 4. The self-compacting concrete can flow and be compact under the action of self gravity, can completely fill a template, and simultaneously obtains good homogeneity without additional vibration. After the self-compacting concrete is poured from the pouring hole 4, the adjusting layer 3 below the pre-track slab 1 and the limiting hole 5 on the pre-track slab 1 are sequentially filled from bottom to top, and the adjusting layer 3 and the limiting boss 7 are formed in a one-step pouring mode.
The prefabricated roadbed structure of vibration isolator on bridge in this embodiment has following effect through practical application:
1. the vibration isolation pad has good elasticity, is adhered below the prefabricated track plate and forms a mass-spring system with the prefabricated track plate to play a role in vibration attenuation, and the vibration attenuation effect can reach more than 10 dB;
2. the field labor can be effectively reduced, the existing cast-in-place vibration reduction ballast bed needs about 70 workers per working face, the scheme only needs about 50 workers per working face, and about 25 percent of labor can be saved;
3. the construction progress can be effectively accelerated, the construction progress of the existing cast-in-place vibration-damping cushion ballast bed is about 50 m/day, the construction progress of the scheme can be improved to 75 m/day, and the construction progress is improved by 50%;
4. the cast-in-place vibration-damping track bed has the advantages that the engineering quality can be effectively improved, the existing cast-in-place vibration-damping track bed is greatly influenced by manual operation factors, the quality of finished products is poor, the prefabricated track plate is mechanically produced in a factory, the manufacturing precision and the production efficiency are high, and the cast-in-place vibration-damping track bed is neat and attractive;
5. the replacement of the vibration damping pad can be realized quickly. The existing cast-in-situ vibration damping pad track bed has poor integrity and is difficult to realize the replacement of the vibration damping pad under the floating slab; this scheme adopts prefabricated track board, and the wholeness is good, reserves the hole for hoist in prefabricated track board side simultaneously, when needing to change the vibration isolator, only needs to hoist prefabricated track board, then take out and trade the vibration isolator under the prefabricated track board can.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the principles of the present invention should be included within the scope of the present invention.
Claims (9)
1. The utility model provides a prefabricated railway roadbed structure of vibration isolator on bridge, its characterized in that, including laying the prefabricated track board on the bridge, the fixed vibration isolator that is equipped with in prefabricated track board below, be provided with the adjustment layer between vibration isolator and the bridge face, be equipped with the filling hole and the spacing hole that run through on the prefabricated track board, the inner wall in filling hole and spacing hole is equipped with the elastic cushion layer, spacing downthehole spacing boss that is equipped with, spacing boss with the adjustment layer is the integrated into one piece structure.
2. The pre-fabricated ballast bed structure of vibration isolator on bridge of claim 1, wherein the filling hole and the limiting hole are in a tapered structure with a small top and a big bottom, the elastic cushion layer is in a tapered structure with a thin top and a thick bottom, and the inner wall of the elastic cushion layer is vertical.
3. The pre-fabricated roadbed structure of the vibration isolation pad on the bridge as claimed in claim 1 or 2, wherein the vibration isolation pad is a rubber material or a foamed polyurethane material.
4. The pre-fabricated roadbed structure of the vibration isolation pad on the bridge as claimed in claim 1 or 2, wherein the elastic cushion layer is ethylene propylene diene monomer.
5. The pre-fabricated ballast bed structure of vibration isolation pad on bridge of claim 1 or 2, wherein the axial centers of the filling hole and the limiting hole coincide with the central line of the pre-fabricated track slab.
6. The pre-fabricated ballast bed structure of claim 5, wherein there are two limiting holes, and one filling hole is located between the two limiting holes.
7. The pre-fabricated roadbed structure of the vibration isolating pad on the bridge as claimed in claim 1, wherein the pre-fabricated track slab is provided with a rail supporting platform for mounting a steel rail.
8. The pre-fabricated roadbed structure of vibration-isolating pad on bridge as claimed in claim 1, wherein the bridge is a box-shaped beam or a U-shaped beam.
9. The pre-fabricated roadbed structure of the vibration isolation pad on the bridge as claimed in claim 1, wherein embedded steel bars connected with the adjusting layer are arranged on the bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921391688.5U CN210621347U (en) | 2019-08-26 | 2019-08-26 | Prefabricated roadbed structure of vibration isolation pad on bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921391688.5U CN210621347U (en) | 2019-08-26 | 2019-08-26 | Prefabricated roadbed structure of vibration isolation pad on bridge |
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| CN210621347U true CN210621347U (en) | 2020-05-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110424194A (en) * | 2019-08-26 | 2019-11-08 | 中铁二院工程集团有限责任公司 | The prefabricated ballast bed structure of vibration isolator and its construction method on a kind of bridge |
| WO2022142186A1 (en) * | 2020-12-30 | 2022-07-07 | 浙江天铁实业股份有限公司 | Track floating slab grouting device |
-
2019
- 2019-08-26 CN CN201921391688.5U patent/CN210621347U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110424194A (en) * | 2019-08-26 | 2019-11-08 | 中铁二院工程集团有限责任公司 | The prefabricated ballast bed structure of vibration isolator and its construction method on a kind of bridge |
| WO2022142186A1 (en) * | 2020-12-30 | 2022-07-07 | 浙江天铁实业股份有限公司 | Track floating slab grouting device |
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