CN212199871U - Ballastless track foundation bed structure - Google Patents
Ballastless track foundation bed structure Download PDFInfo
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- CN212199871U CN212199871U CN202020160677.2U CN202020160677U CN212199871U CN 212199871 U CN212199871 U CN 212199871U CN 202020160677 U CN202020160677 U CN 202020160677U CN 212199871 U CN212199871 U CN 212199871U
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Abstract
The utility model relates to a high-speed railway roadbed engineering field, especially a ballastless track foundation bed structure, including the foundation bed, still include the bar basis that two at least horizontal intervals set up, it is adjacent be provided with energy absorber between the bar basis, energy absorber is elastic construction spare, bar basis top is connected with the backup pad, the backup pad top is connected with the foundation bed. A ballastless track bed structure, be provided with bar basis and energy absorber and can effectively prevent that the expansion rock expansion from leading to arching on the bed, and this structure only need from bottom to top the layering construction can, the construction is convenient, engineering cost is low.
Description
Technical Field
The utility model relates to a high-speed railway roadbed engineering field, especially a ballastless track bed structure.
Background
Along with the rapid development of high-speed railway construction in China, more and more ballastless track high-speed railways pass through expansive rock areas. The expansive rock expansive force is large, and the cutting bed is arched after surface water seeps, so that the smoothness of high-speed rail operation is influenced, and the operation safety of a train is damaged.
The utility model of application No. 201710603423.6 discloses an expanded rock cutting structure of a ballastless track railway and a construction method, and provides an anti-arching structure which is formed by combining a prestressed anchor cable, an anchor pulling plate and a pressure relief hole;
application number 201710609816.8's utility model discloses a ballastless track railway inflation dirt road moat structure and construction method, this method is mainly applied to inflation soil foundation, and the deformation space of its release is limited, when being used for inflation rock foundation condition, if will resist great upwarp power completely, need increase CFG stake set depth and density, its work progress is complicated, and the engineering investment increases.
Application No. 201810424707.3 discloses an anti uplift structure and construction method of inflation soft rock ballastless track cutting bed, eliminates uplift deformation through setting up dark energy dissipation hole, shallow energy dissipation hole in the rock mass vertically and horizontally. However, the anchor cable, the longitudinal and transverse energy dissipation holes and the like designed in the patent are complex in construction process and large in engineering investment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: to the expansion rock cutting bed structure that prior art exists, the work progress is complicated, and the great problem of engineering investment, provides a ballastless track bed structure, can effectively prevent that the expansion rock inflation from leading to the bed to arch, and the construction is convenient, and engineering cost is low.
In order to realize the purpose, the utility model discloses a technical scheme be:
the utility model provides a ballastless track foundation bed structure, includes the foundation bed, still includes the bar basis that two at least horizontal intervals set up, and is adjacent be provided with energy dissipater between the bar basis, energy dissipater is elastic construction spare, bar basis top is connected with the backup pad, the backup pad top is connected with the foundation bed.
When the ballastless track bed structure of the utility model is used, all the strip-shaped foundations and the energy dissipation devices are arranged on the expansive rock cutting, the energy dissipation devices are arranged between the strip-shaped foundations, the supporting plates are arranged on the strip-shaped foundations, the bed is arranged on the supporting plates, because the energy dissipaters are elastic structural members, the expansive force generated by the expansive rocks below the energy dissipaters is absorbed by the energy dissipaters, the expansion force is not transmitted to the bed, the expansion force generated by the expansion rock under the strip foundation is directly transmitted to the bed, the expansion force can be offset by the self gravity of the strip-shaped foundation, the supporting plate and the bed, the contact area between the bed and the expansion rock body is reduced, so that the expansion force applied to the bed is effectively reduced, and the self-gravity of the foundation bed and the supporting plate is utilized to offset the received effective expansion force, so that the aim of avoiding the foundation bed from arching is achieved, and the foundation bed from arching due to the expansion of the expanded rock can be effectively prevented.
And the structure only needs to be constructed layer by layer from bottom to top, the construction is convenient and fast, and the construction cost is low.
To sum up, a ballastless track bed structure, be provided with bar basis and energy absorber and can effectively prevent that the expansion rock expansion from leading to arching on the bed, and this structure only need from bottom to top the layering construction can, the construction is convenient, engineering cost is low.
Preferably, the number of the energy dissipaters is at least two, the energy dissipaters are arranged at intervals, and the strip-shaped foundation is arranged between every two adjacent energy dissipaters.
For a single-track railway, a strip foundation can be arranged on the left side and the right side respectively; for the double-track railway, two energy dissipaters can be arranged, strip foundations are arranged on two sides of each energy dissipater, and the two energy dissipaters share one strip foundation.
Preferably, all of the dissipaters are arranged horizontally.
Preferably, the strip-shaped base is integrally provided with the support plate.
Preferably, a reinforcing steel bar is connected between the strip foundation and the supporting plate.
Preferably, the strip foundation is a structural member made of concrete.
Preferably, the support plate is a structural member made of reinforced concrete,
preferably, the width of the strip foundation along the horizontal direction is greater than or equal to 30cm, and the height of the strip foundation along the vertical direction is greater than or equal to 30 cm.
Preferably, the thickness of the support plate in the vertical direction is greater than or equal to 40 cm.
Preferably, the width of the strip foundation in the horizontal direction is the same as the width of the bottom surface of the foundation bed.
Preferably, the foundation bed comprises a surface layer and a bottom layer.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. a ballastless track bed structure, be provided with bar basis and energy absorber and can effectively prevent that the expansion rock expansion from leading to arching on the bed, and this structure only need from bottom to top the layering construction can, the construction is convenient, engineering cost is low.
2. According to the expansion rock expansibility be less than the gravity that its upper portion bore to and the expansion rock allows the bearing capacity that the bearing capacity is greater than actual expansion rock to confirm the width on bar basis, compare indulge transversely set up dark energy dissipation hole, shallow energy dissipation hole and eliminate the uplift and warp, the overall structure atress is clear, the calculation is simple, its safety and stability performance is high, and this structure only need from bottom to top the layering construction can, it is convenient to be under construction, engineering cost is low.
Drawings
Fig. 1 is the utility model discloses a cross section sectional view of ballastless track bed structure.
Icon:
2-a foundation bed; 21-bedding surface layer; 22-bedding layer; 3-a support plate; 4-energy dissipation device; 5-bar foundation.
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.
Example 1
As shown in fig. 1, the ballastless track foundation bed structure of this embodiment includes a foundation bed 2, and further includes at least two bar foundations 5 horizontally arranged at an interval, an energy dissipation device 4 is arranged between adjacent bar foundations 5, the energy dissipation device 4 is an elastic structural member, a support plate 3 is connected to the top of the bar foundation 5, and the foundation bed 2 is connected to the top of the support plate 3.
In addition, in a more preferable mode, the strip foundation 5 is a structural member made of concrete.
The strip-shaped foundation 5 can adopt prefabricated or cast-in-place concrete,
in particular, the support plate 3 is a structural member made of reinforced concrete,
the support plate 3 may be made of prefabricated or cast-in-place reinforced concrete,
specifically, the width of the strip foundation 5 in the horizontal direction is greater than or equal to 30cm, the height of the strip foundation 5 in the vertical direction is greater than or equal to 30cm, and the thickness of the support plate 3 in the vertical direction is greater than or equal to 40 cm.
In addition to the above, it is further preferable that the strip foundation 5 has the same width in the horizontal direction as the bottom surface of the bed 2.
In addition to the above, in a more preferable mode, the foundation bed 2 includes a foundation bed surface layer 22 and a foundation bed bottom layer 21.
When the ballastless track bed structure is used, all the strip-shaped foundations 5 and the energy dissipaters 4 are arranged on the expanded rock cutting, the energy dissipaters 4 are arranged between the strip-shaped foundations 5, the supporting plates 3 are arranged on the strip-shaped foundations 5, the bed 2 is arranged on the supporting plates 3, because the energy dissipaters 4 are elastic structural members, the expansion force generated by the expanded rock below the energy dissipaters 4 is absorbed by the energy dissipaters 4 without transmitting the expansion force to the bed 2, the expansion force generated by the expanded rock below the strip-shaped foundations 4 is directly transmitted to the bed, the expansion force can be offset by the self gravity of the strip-shaped foundations 4, the supporting plates 3 and the bed 2, the contact area between the bed 2 and the rock mass of the expanded rock mass is reduced, the expansion force applied to the bed 2 is effectively reduced, and the effective expansion force applied to the bed 2 and the supporting plates 3 is offset by the self gravity of the bed 2 and the supporting plates 3, the purpose of avoiding the upward arching of the foundation bed is achieved, so that the upward arching of the foundation bed caused by the expansion of the expansive rock can be effectively prevented.
And the structure only needs to be constructed layer by layer from bottom to top, the construction is convenient and fast, and the construction cost is low.
The energy dissipation device 4 is made of elastic materials, compression deformation is generated under the action of expansion force to absorb expansion force, and deformation can be recovered after the expansion force is eliminated.
To sum up, a ballastless track bed structure, be provided with bar basis 5 and energy absorber 4 and can effectively prevent that the expansion rock expansion from leading to arching on the bed, and this structure only need from bottom to top the layering construction can, the construction is convenient, engineering cost is low.
On the basis, in a further preferable mode, at least two energy dissipaters 4 are arranged at intervals, and the strip foundation 5 is arranged between adjacent energy dissipaters 4.
For a single-track railway, a strip foundation 5 can be respectively arranged at the left side and the right side; for a two-track railway, two energy dissipaters 4 can be arranged, strip foundations 5 are arranged on two sides of each energy dissipater 4, and one strip foundation 5 is shared between the two energy dissipaters 4.
Preferably, all the dissipaters 4 are arranged horizontally.
In addition to the above, it is further preferable that the strip foundation 5 is provided integrally with the support plate 3.
Specifically, a connecting steel bar is arranged between the strip foundation 5 and the supporting plate 3.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The ballastless track foundation bed structure comprises a foundation bed (2) and is characterized by further comprising at least two strip foundations (5) arranged at horizontal intervals, energy dissipation devices (4) are arranged between the adjacent strip foundations (5), the energy dissipation devices (4) are elastic structural members, the top of each strip foundation (5) is connected with a support plate (3), and the top of each support plate (3) is connected with the foundation bed (2).
2. The ballastless track bed structure of claim 1, wherein the number of the energy dissipaters (4) is at least two, and the energy dissipaters are arranged at intervals, and the strip-shaped foundation (5) is arranged between the adjacent energy dissipaters (4).
3. The ballastless track bed structure of claim 2, wherein all the energy dissipaters (4) are arranged horizontally.
4. The ballastless track bed structure of claim 3, wherein the strip-shaped foundation (5) is provided integrally with the support plate (3).
5. The ballastless track bed structure of claim 3, wherein a connecting steel bar is arranged between the strip foundation (5) and the support plate (3).
6. The ballastless track bed structure of claim 3, wherein the width of the strip foundation (5) in the horizontal direction is the same as the width of the bottom surface of the bed (2).
7. The ballastless track bed structure of any one of claims 1 to 6, wherein the strip foundation (5) is a concrete member.
8. The ballastless track bed structure of any one of claims 1 to 6, wherein the width of the strip foundation (5) in the horizontal direction is greater than or equal to 30cm, and the height in the vertical direction is greater than or equal to 30 cm.
9. The ballastless track bed structure of claim 8, wherein the thickness of the support plate (3) in the vertical direction is greater than or equal to 40 cm.
10. The ballastless track bed structure of any one of claims 1-6, wherein the bed (2) comprises a bed surface layer (22) and a bed bottom layer (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020160677.2U CN212199871U (en) | 2020-02-11 | 2020-02-11 | Ballastless track foundation bed structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020160677.2U CN212199871U (en) | 2020-02-11 | 2020-02-11 | Ballastless track foundation bed structure |
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| CN212199871U true CN212199871U (en) | 2020-12-22 |
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| CN202020160677.2U Active CN212199871U (en) | 2020-02-11 | 2020-02-11 | Ballastless track foundation bed structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155369A (en) * | 2020-02-11 | 2020-05-15 | 中铁二院工程集团有限责任公司 | Ballastless track foundation bed structure and determination method for strip-shaped foundation width thereof |
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2020
- 2020-02-11 CN CN202020160677.2U patent/CN212199871U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155369A (en) * | 2020-02-11 | 2020-05-15 | 中铁二院工程集团有限责任公司 | Ballastless track foundation bed structure and determination method for strip-shaped foundation width thereof |
| CN111155369B (en) * | 2020-02-11 | 2024-06-04 | 中铁二院工程集团有限责任公司 | Ballastless track foundation bed structure and method for determining strip-shaped foundation width thereof |
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