CN220520973U - Reinforced ballasted track structure in earthquake region - Google Patents
Reinforced ballasted track structure in earthquake region Download PDFInfo
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- CN220520973U CN220520973U CN202321923324.3U CN202321923324U CN220520973U CN 220520973 U CN220520973 U CN 220520973U CN 202321923324 U CN202321923324 U CN 202321923324U CN 220520973 U CN220520973 U CN 220520973U
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Abstract
The utility model discloses a reinforced ballast track structure in a seismic area, which comprises a track bed and sleepers positioned on the track bed, wherein the track bed comprises a plurality of ballast particles, the track bed is divided into a dispersion part and a consolidation part, the ballast particles in the consolidation part are consolidated with each other, and the ballast particles in the dispersion part are mutually independent; the bottom surfaces of the two ends of the sleeper are contacted with the top surface of the consolidation part. The utility model provides a ballast track structure reinforced in a seismic area, which aims at solving the problems of high maintenance frequency and maintenance cost of a ballast track in the seismic area, easy collapse and instability of a ballast bed during an earthquake and the like in the prior art, and achieves the purposes of delaying the degradation rate of the ballast, reducing the maintenance cost, improving the structural strength of the track and the like.
Description
Technical Field
The utility model relates to the field of ballasted tracks, in particular to a reinforced ballasted track structure in a seismic area.
Background
Along with the gradual perfection of the high-speed railway network and the passenger and cargo collinear railway network in China, the construction requirements of western railways are continuously increased. As the western part of China is in the European style earthquake zone geological plate active section, the terrain change is large, the fault distribution is more, the earthquake is multiple and the earthquake intensity is generally higher, and the strip-shaped characteristic of the railway line can not avoid the situation that the railway line partially passes through the strong earthquake zone or approaches the geological fault zone. And the ballast tracks are paved in special sections such as long bridges, geological activity fracture zones and the like due to the deformation of the lower foundation and the like. Meanwhile, the ballast tracks are adopted for all the common speed railways and heavy haul railways in China.
The ballasted track mainly comprises discrete gravel ballasts, and under the action of earthquake load, the conditions of flow collapse, instability and the like are easy to occur; in addition, due to the granular structure of the ballast bed, under the influence of factors such as train load, external environment effect and the like, the ballast bed can be degraded, the smoothness of a line is influenced, and maintenance and repair operations such as tamping, screening and the like are required to be frequently carried out, so that the maintenance frequency and the cost are high. In addition, in the prior art in recent years, a ballast glue spraying technology and a polyurethane curing ballast bed technology are appeared. The spraying layer of the ballast glue spraying ballast bed technology is thinner, and the effect of improving the ballast bed strength is limited; the ballast glue bonds the top surface of the ballast bed completely, and the drainage performance of the ballast bed is not smooth; the price of the ballast glue material is high, the ballast glue on the surface layer of the ballast can be damaged by tamping, and the ballast glue needs to be sprayed again after maintenance each time, so that the cost is high; the polyurethane curing ballast bed technology can improve the mechanical property of the ballast bed, prevent the splashing of the ballast and reduce maintenance, but the construction has higher requirements on conditions such as the cleanliness of the ballast and the environmental temperature, and needs special mechanical equipment to finish the construction, so that the construction cost is higher and the problem of cost restriction is serious.
Therefore, the ballast bed structure with controllable cost and capability of improving the structural strength of the track in the earthquake area and delaying the degradation of the ballast bed is designed, and has important significance for the diversified development of the ballast track technology and the track structure of the high-speed railway in China.
Disclosure of Invention
The utility model provides a ballast track structure reinforced in a seismic area, which aims at solving the problems of high maintenance frequency and maintenance cost of a ballast track in the seismic area, easy collapse and instability of a ballast bed during an earthquake and the like in the prior art, and achieves the purposes of delaying the degradation rate of the ballast, reducing the maintenance cost, improving the structural strength of the track and the like.
The utility model is realized by the following technical scheme:
the ballast track structure comprises a track bed and sleepers positioned on the track bed, wherein the track bed comprises a plurality of ballast particles, the track bed is divided into a discrete part and a consolidation part, the ballast particles in the consolidation part are consolidated with each other, and the ballast particles in the discrete part are mutually independent; the bottom surfaces of the two ends of the sleeper are contacted with the top surface of the consolidation part.
Aiming at the problems that the maintenance frequency and the maintenance cost of the ballast track in the earthquake area are high, the ballast bed is easy to collapse and unstably happen during the earthquake in the prior art, the utility model provides a ballast track structure reinforced in the earthquake area. As the prior art in the field of ballasted tracks, a track bed comprises a plurality of broken stone ballast particles, and a sleeper is arranged on the track bed. The ballast bed is divided into a dispersion part and a consolidation part, wherein the ballast particles in the consolidation part are mutually consolidated, and the consolidation mode can be any consolidation mode which can be realized by a person skilled in the art. The rest areas except the consolidation part in the ballast bed are dispersion parts, and the broken stone ballast particles in the dispersion parts are mutually independent, namely, the broken stone ballast particles in the dispersion parts are not consolidated, but keep a dispersion state as the conventional ballasted track.
As the common knowledge in the art, the sleeper is paved on the track bed along the transverse direction, the application needs to ensure that the bottom surfaces of the two ends of the sleeper are contacted with the top surface of the consolidation part, namely, the track bed surface layer which is positioned above the consolidation part and below the two ends of the sleeper is ensured to be at least formed by the consolidation part, so that the effective contact between the bottom surface of the end part of the sleeper and the top surface of the consolidation part can be ensured.
According to the method, only partial broken stone railway ballast is solidified, a piece of solidified band is formed through the contact point of the railway ballast and the railway ballast, so that the structural mechanical property of a railway ballast bed is improved, the structural strength of the railway ballast bed under the action of earthquake load is improved, and the degradation rate of the railway ballast is further effectively delayed; meanwhile, the partial or complete solidification of the surface layer of the ballast bed can prevent the ballast from splashing and reduce the risk of collapse and instability of the ballast bed during an earthquake; in addition, due to the adoption of the local solidification mode, more gaps exist among the ballast particles, and the drainage requirement is met. In addition, the track bed after local solidification in the application has certain flexibility, solidification points among track ballast particles can be broken during the tamping of a large machine, and maintenance is not affected; after the tamping operation is finished, only partial solidification is needed again, and compared with the prior art, the maintenance cost can be effectively reduced.
Further, the crushed stone ballast particles in the consolidation part are consolidated by a curing agent.
And in the concrete processing, pouring the curing agent from top to bottom according to the distribution area of the needed consolidation part, so that the curing agent can permeate into the ballast bed to the needed depth.
The curing agent can be any existing curing agent which can be thought by a person skilled in the art, the materials, components and the like of the curing agent are not limited, and common curing agents with lower cost such as cement mortar, asphalt, acrylic acid or JS polymer and the like are preferably adopted, so that the manufacturing cost can be effectively saved, and the production and maintenance cost is further reduced.
Preferably, the two concretion parts are respectively positioned at two transverse ends of the ballast bed, and the longitudinal height of the concretion parts is equal to the height of the ballast bed; the discrete part is arranged between the two consolidation parts. The scheme sets the transverse two ends of the ballast bed as consolidation parts, and then sets the area between the two consolidation parts as a dispersion part. The longitudinal height of the consolidation part is equal to the height of the ballast bed, namely the consolidation part completely penetrates through the whole ballast bed in the longitudinal direction, so that partial areas are reserved on the top surface and the bottom surface of the ballast bed as the consolidation part, and the arrangement mode can effectively prevent railway ballasts on the lower layer of the bearing area from flowing, and further improve the stability of the ballast bed.
The scheme is characterized in that the bearing area under the rail and the road bed side slope are all arranged as the consolidation part, and the scheme has the advantages that: the strength of the ballast bed can be obviously improved by solidifying the bearing area under the rail; simultaneously, the ballast bed side slope is fully consolidated, so that the collapse of the ballast bed side slope under the action of an earthquake can be more effectively prevented, and the stability of the ballast bed structure in the earthquake area is improved.
Further, the inner side surface of the consolidation part is inclined to the center direction of the sleeper from top to bottom. This arrangement is advantageous in reducing the difficulty of casting the consolidated portion while improving the stability of the discrete portion located in the intermediate region.
Preferably, the two concretion parts are respectively positioned right below the two ends of the sleeper, and the longitudinal height of the concretion parts is equal to the height of the ballast bed; and the dispersion parts are arranged on two sides of any consolidation part along the transverse direction of the ballast bed. The scheme sets the bearing areas under the rails at the two ends of the sleeper as the consolidation parts, so that the stability of the ballast bed is obviously improved; meanwhile, the production and maintenance cost of the scheme is relatively low. The longitudinal height of the consolidation part is equal to the height of the ballast bed, namely the consolidation part completely penetrates through the whole ballast bed in the longitudinal direction, so that partial areas are reserved on the top surface and the bottom surface of the ballast bed as the consolidation part, and the arrangement mode can effectively prevent railway ballasts on the lower layer of the bearing area from flowing, and further improve the stability of the ballast bed.
Furthermore, the consolidation part is trapezoidal on the cross section of the ballast bed, and the bottom edge length of the trapezoid is larger than the top edge length, namely the trapezoid is of a normal structure with a small upper part and a large lower part, which is more beneficial to improving the strength stability of the ballast bed.
Preferably, the sleeper is integrally located on the consolidation portion. In the scheme, not only the bottom surfaces of the two ends of the sleeper are contacted with the top surface of the consolidation part, but also the bottom surface of the whole sleeper is contacted with the top surface of the consolidation part, namely the whole sleeper is completely positioned on the consolidation part, and the projection of the sleeper to the surface of the ballast bed is completely positioned on the consolidation part. According to the scheme, the surface railway ballast below the sleeper is fully solidified, so that the stability of a railway ballast bed can be improved.
Further, the consolidation portions are only one, and the longitudinal height of the consolidation portions is smaller than the ballast bed height. The scheme defines that only one consolidation part is positioned right below the sleeper, the consolidation depth is smaller than the total depth of the ballast bed, and the scheme has the advantages of small consolidation range, engineering cost saving and the like.
Preferably, the two concretion parts are respectively positioned right below the two ends of the sleeper, and the longitudinal height of the concretion parts is smaller than the height of the ballast bed. The scheme sets the bearing areas under the rails at the two ends of the sleeper as the consolidation parts, and ensures that the consolidation depth is smaller than the total depth of the ballast bed, so that the consolidation area of the arrangement mode is very small, and the production and maintenance cost is low.
Further, the consolidation part is in an arc shape with a concave surface upwards on the cross section of the ballast bed.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
1. according to the reinforced ballasted track structure in the earthquake region, the ballast bed is partially solidified to form the solidified part, so that the flow of ballast particles is inhibited, the structural strength of the ballasted ballast bed in the high earthquake intensity region is improved, the splashing of the ballast is not easy to occur, and the risk of collapse and instability of the ballast bed in an earthquake can be reduced.
2. According to the reinforced ballast track structure in the earthquake region, the structure of combining the consolidation part and the dispersion part ensures that gaps exist among railway ballasts and drainage is not influenced while the structural strength of a track bed is improved.
3. The reinforced ballasted track structure in the earthquake region is easy to break during tamping and convenient to maintain.
4. The reinforced ballasted track structure in the earthquake region can effectively reduce the production and maintenance cost of a ballast bed.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model. In the drawings:
FIG. 1 is a schematic diagram of example 1 of the present utility model;
FIG. 2 is a schematic diagram of example 2 of the present utility model;
FIG. 3 is a schematic diagram of example 3 of the present utility model;
FIG. 4 is a schematic diagram of example 4 of the present utility model;
FIG. 5 is a schematic diagram of consolidation of crushed stone ballasts in an embodiment of the utility model.
In the drawings, the reference numerals and corresponding part names:
1-a bulk part, 2-a consolidation part, 3-a sleeper, 21-ballast particles and 22-a consolidation point.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present utility model, the present utility model will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present utility model and the descriptions thereof are for illustrating the present utility model only and are not to be construed as limiting the present utility model.
Example 1:
the ballast track structure comprises a track bed and a sleeper 3 positioned on the track bed, wherein the track bed comprises a plurality of ballast particles, the track bed is divided into a dispersion part 1 and a consolidation part 2, the ballast particles in the consolidation part 2 are consolidated with each other, and the ballast particles in the dispersion part 1 are independent from each other; the bottom surfaces of the two ends of the sleeper 3 are contacted with the top surface of the consolidation part 2.
As shown in fig. 1, two consolidation portions 2 in the present embodiment are respectively located at two lateral ends of the ballast bed, and the longitudinal height of the consolidation portions 2 is equal to the height of the ballast bed; between the two consolidation portions 2 is the dispersion portion 1. The inner side surface of the consolidation part 2 is inclined from top to bottom to the center direction of the sleeper 3.
The method has the advantages that the bearing area under the rail is completely consolidated, so that the strength of the ballast bed can be obviously improved; simultaneously, all the side slopes are consolidated, so that the collapse of the ballast bed side slopes under the action of an earthquake is effectively prevented, and the stability of the ballast bed structure in the earthquake area is improved. Of course, the consolidation area of this embodiment is large and the cost is somewhat higher.
Example 2:
the ballast track structure comprises a track bed and a sleeper 3 positioned on the track bed, wherein the track bed comprises a plurality of ballast particles, the track bed is divided into a dispersion part 1 and a consolidation part 2, the ballast particles in the consolidation part 2 are consolidated with each other, and the ballast particles in the dispersion part 1 are independent from each other; the bottom surfaces of the two ends of the sleeper 3 are contacted with the top surface of the consolidation part 2.
As shown in fig. 2, two consolidation portions 2 in the embodiment are respectively positioned right below two ends of the sleeper 3, and the longitudinal height of the consolidation portions 2 is equal to the height of the ballast bed; either of the consolidation portions 2 has the dispersion portion 1 on both sides in the widthwise direction of the ballast bed. The consolidation portion 2 has a trapezoid shape in cross section of the ballast bed, and the length of the bottom side of the trapezoid is larger than that of the top side.
Example 3:
the ballast track structure comprises a track bed and a sleeper 3 positioned on the track bed, wherein the track bed comprises a plurality of ballast particles, the track bed is divided into a dispersion part 1 and a consolidation part 2, the ballast particles in the consolidation part 2 are consolidated with each other, and the ballast particles in the dispersion part 1 are independent from each other; the bottom surfaces of the two ends of the sleeper 3 are contacted with the top surface of the consolidation part 2.
As shown in fig. 3, the number of the consolidation portions 2 in the transverse direction of the ballast bed in the present embodiment is one, the longitudinal height of the consolidation portions 2 is smaller than the height of the ballast bed, and the sleeper 3 is integrally located on the consolidation portions 2.
According to the method, the ballast on the surface layer of the sleeper bottom is fully solidified, so that the stability of a ballast bed can be improved, and meanwhile, the solidifying range is small, and the cost is low.
Example 4:
the ballast track structure comprises a track bed and a sleeper 3 positioned on the track bed, wherein the track bed comprises a plurality of ballast particles, the track bed is divided into a dispersion part 1 and a consolidation part 2, the ballast particles in the consolidation part 2 are consolidated with each other, and the ballast particles in the dispersion part 1 are independent from each other; the bottom surfaces of the two ends of the sleeper 3 are contacted with the top surface of the consolidation part 2.
As shown in fig. 4, two consolidation portions 2 in this embodiment are respectively located right below two ends of the sleeper 3, and the longitudinal height of the consolidation portions 2 is smaller than the track bed height. The consolidation part 2 is in an arc shape with a concave surface upwards on the cross section of the ballast bed.
The ballast of the bearing area under the sleeper is solidified in the embodiment, so that the stability of the ballast bed can be improved, and meanwhile, the solidification area is small, so that the ballast bed has the advantage of extremely low cost.
Example 5:
in the seismic region reinforced ballasted track structure, on the basis of any one of the above embodiments, the ballast particles in the consolidation portion 2 are consolidated by a curing agent.
The consolidation state between the ballast particles 21 in the consolidation portion 2 is shown in fig. 5; the consolidating agent forms a consolidation node 22 through the points of contact of the ballast with the ballast. During tamping, after the tamping pick is inserted, the consolidation points 22 are broken, and the ballast particles 21 are restored to a discrete state, so that tamping maintenance is not affected. After the tamping is finished, the curing agent is poured again, and the fixed node 22 is formed again.
In the embodiment, the ballast particles are in point bonding, so that the drainage of the ballast bed is not affected; the original consolidation point 22 can be broken during tamping, so that maintenance is not affected; the adopted curing agent has lower cost, does not require the cleanliness of railway ballast and the environmental temperature during construction, and has simple and convenient casting process and lower cost.
Preferably, the curing agent is a cement-based material.
In this example, experiments were carried out using a cement-based material curing agent as an example structure according to the following mass ratios:
99.54% of 42.5 Portland cement, 0.3% of water reducing agent, 0.1% of retarder, 0.06% of plastic expansion agent and water-cement ratio of 0.26. The consolidation portion 2 was set in the same manner as in example 3 and the thickness of the consolidation portion 2 was set to 5cm, to obtain a ballast bed. The actual measurement shear strength of the ballast bed block is 23.05kN, which is far higher than the actual measurement shear strength of a common ballasted ballast bed by 6.01kN, and the application can prove that the application has obvious effect on the ballasted track in the reinforced earthquake area.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.
It should be noted that in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, the term "coupled" as used herein may be directly coupled or indirectly coupled via other components, unless otherwise indicated.
Claims (10)
1. The reinforced ballast track structure in the earthquake area comprises a track bed and sleepers (3) positioned on the track bed, wherein the track bed comprises a plurality of ballast particles, and is characterized in that the track bed is divided into a dispersion part (1) and a consolidation part (2), the ballast particles in the consolidation part (2) are mutually consolidated, and the ballast particles in the dispersion part (1) are mutually independent; the bottom surfaces of the two ends of the sleeper (3) are contacted with the top surface of the consolidation part (2).
2. A seismic area reinforced ballasted track structure according to claim 1, characterized in that the ballast particles in the consolidation part (2) are consolidated by a curing agent.
3. A seismic region reinforced ballasted track structure according to claim 1 or 2, wherein the two concretion parts (2) are respectively positioned at two transverse ends of the ballast bed, and the longitudinal height of the concretion parts (2) is equal to the height of the ballast bed; the discrete part (1) is arranged between the two consolidation parts (2).
4. A seismic area reinforced ballasted track structure according to claim 3, wherein the inner side surface of the consolidation part (2) is inclined from top to bottom to the center direction of the sleeper (3).
5. The reinforced ballasted track structure of the earthquake area according to claim 1 or 2, wherein the number of the concretion parts (2) is two, the concretion parts are respectively positioned under the two ends of the sleeper (3), and the longitudinal height of the concretion parts (2) is equal to the height of the ballast bed; and each consolidation part (2) is provided with the dispersion parts (1) at two sides along the transverse direction of the ballast bed.
6. A seismic area reinforced ballasted track structure according to claim 5, characterized in that the consolidation part (2) has a trapezoid shape in cross section of the ballast bed, the bottom side length of the trapezoid being larger than the top side length.
7. A seismic area reinforced ballasted track structure according to claim 1 or 2, characterized in that the sleeper (3) is integrally located on the consolidation part (2).
8. A seismic area reinforced ballasted track structure according to claim 7, characterized in that the consolidation part (2) is only one and the longitudinal height of the consolidation part (2) is smaller than the ballast bed height.
9. The reinforced ballasted track structure of the earthquake area according to claim 1 or 2, wherein the number of the concretion parts (2) is two, the concretion parts are respectively positioned under two ends of the sleeper (3), and the longitudinal height of the concretion parts (2) is smaller than the height of the ballast bed.
10. A seismic area reinforced ballasted track structure according to claim 9, characterized in that the consolidation part (2) is in a concave upward arc shape on the cross section of the ballast bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321923324.3U CN220520973U (en) | 2023-07-20 | 2023-07-20 | Reinforced ballasted track structure in earthquake region |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321923324.3U CN220520973U (en) | 2023-07-20 | 2023-07-20 | Reinforced ballasted track structure in earthquake region |
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| Publication Number | Publication Date |
|---|---|
| CN220520973U true CN220520973U (en) | 2024-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321923324.3U Active CN220520973U (en) | 2023-07-20 | 2023-07-20 | Reinforced ballasted track structure in earthquake region |
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| Country | Link |
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| CN (1) | CN220520973U (en) |
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2023
- 2023-07-20 CN CN202321923324.3U patent/CN220520973U/en active Active
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