WO2021082005A1

WO2021082005A1 - Rail structure

Info

Publication number: WO2021082005A1
Application number: PCT/CN2019/115137
Authority: WO
Inventors: 肖俊恒; 王红; 郄录朝; 徐旸; 许永贤; 杜香刚; 刘海涛; 赵磊
Original assignee: 中国铁道科学研究院铁道建筑研究所
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2021-05-06

Abstract

Provided is a rail structure. The rail structure comprises: prefabricated ballast bed assemblies, a plurality of prefabricated ballast bed assemblies being provided and arranged at intervals in a first predetermined direction; and a steel rail, the steel rail being fixedly arranged on the plurality of prefabricated ballast bed assemblies. Therefore, the problem in the prior art of a rail structure being difficult to maintain and repair is thus solved.

Description

Track structure

Technical field

The invention relates to the field of train tracks, in particular to a track structure.

Background technique

High-speed passenger transportation and heavy freight transportation are the main directions for the development of railway technology, and the track structure is directly in contact with the train in operation, and its service status will directly affect the operational safety of the train.

Ballastless track has the advantages of strong integrity, good stability, easy maintenance of track geometry, small track deformation, and less maintenance work. However, the project investment cost is high, the on-site construction is complicated and the technical requirements are high, and the wheel and rail noise is large and the The impact of environmental vibration is prominent, and the ballastless track is mostly laid on the foundation of the bridge. Under the action of temperature load, the ballastless track and the underlying foundation will interact significantly, and it is extremely difficult to repair once a problem occurs.

In order to maintain the geometric state and elasticity of the ballasted track, it is necessary to carry out continuous maintenance and repair work (tamping and cleaning operations), and the maintenance work itself will bring about the ballast bed. Certain side effects, such as the crushing of ballast particles caused by tamping, will further aggravate the degradation of the ballast bed.

Summary of the invention

The main purpose of the present invention is to provide a track structure to solve the problem of difficult maintenance of the track structure in the prior art.

In order to achieve the above-mentioned object, the present invention provides a track structure, including: precast ballast bed assemblies, the number of precast ballast bed assemblies is multiple, the plurality of precast ballast bed assemblies are arranged at intervals along a first predetermined direction; the steel rails are fixedly arranged in a plurality of Prefabricated track bed components.

Further, the prefabricated track bed assembly includes: a curing track bed, two curing track beds, the two curing track beds are spaced apart along a second predetermined direction, the first predetermined direction and the second predetermined direction are perpendicular to each other; sleepers, the first ends of the sleepers are provided On one curing track bed, the second end of the sleeper is arranged on the other curing track bed, and the steel rail is arranged on the sleeper.

Further, the cured track bed is a polyurethane cured track bed.

Further, the prefabricated track bed assembly further includes a fastener, at least part of the fastener passes through the rail and the sleeper to fix the rail to the sleeper.

Further, the track structure further includes a packing layer, and a packing layer is arranged between each two adjacent precast track bed components, so as to fill the gap between each adjacent two precast track bed components through the packing layer.

Further, the filling layer includes ballast.

Further, the track structure further includes: a drainage assembly, the drainage assembly is arranged on the side of the precast track bed assembly, and the water inlet end of the drainage assembly is connected with the precast track bed assembly to drain the water in the precast track bed assembly through the drainage assembly.

Further, the track structure further includes: an adjustment layer, the adjustment layer is arranged on the base surface, the adjustment layer is arranged under the precast track bed assembly and connected with the precast track bed assembly, and the height of the adjustment layer relative to the base surface is adjustable. To adjust the height of the precast track bed component relative to the base surface.

Further, the drainage assembly includes a drainage groove, the drainage groove is arranged on the surface of the adjustment layer away from the base surface, the drainage groove extends along a second predetermined direction, and the first predetermined direction is perpendicular to the second predetermined direction.

Further, the track structure further includes a protective layer, the protective layer is arranged on the outer side of the precast track bed assembly, and the drainage groove extends to the surface of the protective layer along the second predetermined direction.

Applying the technical solution of the present invention, the track structure includes a precast track bed assembly and a steel rail. There are multiple precast track bed assemblies, the plurality of precast track bed assemblies are arranged at intervals along a first predetermined direction, and the steel rails are fixedly arranged on the plurality of precast track bed assemblies, wherein The prefabricated track bed components are prefabricated in the workshop before laying on site. The cleanliness and compactness of the ballast can be accurately controlled. The multiple prefabricated track bed components are arranged at intervals to facilitate the maintenance and repair of the prefabricated track bed components. The maintenance solves the problem of difficult maintenance and repair of the track structure in the prior art.

Description of the drawings

The drawings of the specification constituting a part of the application are used to provide a further understanding of the present invention, and the exemplary embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Figure 1 shows a schematic structural diagram of an embodiment of a track structure according to the present invention;

Figure 2 shows a schematic structural view of the track structure according to the present invention from a first perspective;

Figure 3 shows a schematic structural view of the track structure according to the present invention from a second perspective; and

Fig. 4 shows a schematic structural view of an embodiment of a precast track bed assembly of the track structure according to the present invention.

The above drawings include the following reference signs:

10. Prefabricated track bed components; 20. Steel rails; 11. Cured track beds; 12. Sleepers; 13. Fasteners; 30. Filling layer; 40. Drainage components; 41. Drainage groove; 50. Adjustment layer; 60. Protective layer.

Detailed ways

It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other if there is no conflict. Hereinafter, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.

It should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and/or "including" are used in this specification, they indicate There are features, steps, operations, devices, components, and/or combinations thereof.

The present invention provides a track structure, please refer to Figures 1 to 4, including: precast ballast bed assembly 10, there are multiple precast ballast bed assemblies 10, the plurality of precast ballast bed assemblies 10 are arranged at intervals along a first predetermined direction; steel rail 20 , The steel rail 20 is fixedly arranged on a plurality of precast track bed assemblies 10.

The track structure provided according to the present invention includes a precast track bed assembly 10 and a steel rail 20. There are multiple precast track bed assemblies 10, the plurality of precast track bed assemblies 10 are arranged at intervals along a first predetermined direction, and the steel rails 20 are fixedly arranged on the plurality of precast track beds. On the assembly 10, the prefabricated track bed assembly is prefabricated in the workshop before the site is laid. The cleanliness and compactness of the ballast can be accurately controlled. The multiple precast track bed assemblies 10 are arranged at intervals to facilitate subsequent alignment. The maintenance and maintenance of the precast track bed assembly 10 solves the problem of difficult maintenance and maintenance of the track structure in the prior art.

Specifically, the prefabricated track bed assembly 10 includes: a curing track bed 11, two curing track beds 11, the two curing track beds 11 are spaced apart along a second predetermined direction, the first predetermined direction and the second predetermined direction are perpendicular to each other; sleepers 12, sleepers The first end of 12 is set on one solidified track bed 11, the second end of the sleeper 12 is set on another solidified track bed 11, and the steel rail 20 is set on the sleeper 12.

Preferably, the cured track bed 11 is formed by bonding the ballast with a cured material. The cured material includes materials such as polyurethane, modified asphalt, and cement-based composite materials. Under the load of train shock and vibration, the cured material can reduce the ballast particles. The ballast deterioration caused by the mutual displacement between the ballasts. At the same time, because the gaps between the gravel particles in the ballast are filled by the solidified material, the contact stress between the various gravel particles is reduced, and the ballast is slowed down. Broken and pulverized, extending the service life of the track structure. In the embodiment provided by the present invention, the cured track bed 11 is a polyurethane cured track bed.

In order to facilitate the connection between the rail 20 and the sleeper 12, the prefabricated track bed assembly 10 further includes a fastener 13, at least part of which passes through the rail 20 and the sleeper 12 to fix the rail 20 to the sleeper 12. When repairing and maintaining the track, firstly, the rail 20 or sleeper 12 is maintained and repaired through the fastener 13.

In the process of specific implementation, the track structure further includes: a packing layer 30, and a packing layer 30 is arranged between each two adjacent precast track bed assemblies 10, so as to fill each adjacent two precast track bed assemblies through the packing layer 30 The gap between 10. Preferably, the distance between each adjacent two precast track bed assemblies 10 is 5 cm to 20 cm, so as to replace and maintain each precast track bed assembly 10 to avoid interference and extrusion between two adjacent precast track bed assemblies 10 , Resulting in deformation of the track. In addition, it is necessary to avoid too large a distance between two adjacent precast track bed assemblies 10, so as to avoid reducing the bearing capacity of the steel rail 20 and reducing the service life of the rail.

Preferably, the filling layer 30 includes ballast.

In the embodiment provided by the present invention, the track structure further includes: a drainage assembly 40, which is arranged on the side of the precast track bed assembly 10, and the water inlet end of the drainage assembly 40 is in communication with the precast track bed assembly 10 to pass through the drainage assembly 40 The water in the precast ballast bed assembly 10 is discharged. The drainage performance of the track structure is increased to prevent the precast ballast bed assembly 10 from being deformed by the accumulation of water. At the same time, it can also prevent the traditional ballast bed from intruding dust from the outside. The drainage assembly 40 does not require daily maintenance such as tamping and cleaning. The operation saves the maintenance and repair costs of the track, and also avoids the secondary damage to the ballast particles caused by the tamping and cleaning operations, and prolongs the service life of the track structure.

In the process of specific implementation, the track structure further includes: an adjustment layer 50, which is arranged on the base surface, and the adjustment layer 50 is arranged below the precast track bed assembly 10 and connected to the precast track bed assembly 10, and the adjustment layer 50 is relative to the base. The height of the surface is adjustable to adjust the height of the precast track bed assembly 10 relative to the base surface. Such a setting can facilitate the later maintenance of the precast track bed assembly 10, and the adjustment layer 50 ensures that each precast track bed assembly 10 is at the same height.

In the embodiment provided by the present invention, the drainage assembly 40 includes a drainage groove 41 disposed on the surface of the adjustment layer 50 away from the base surface, and the drainage groove 41 extends along a second predetermined direction. The direction is vertical. Specifically, there is a predetermined angle between the drainage groove 41 and the horizontal surface, so that the accumulated water is discharged along the drainage groove 41.

The track structure further includes a protective layer 60 arranged on the outer side of the precast track bed assembly 10, and the drainage groove 41 extends to the surface of the protective layer 60 in the second predetermined direction. It should be noted here that, as shown in FIG. 3, the protective layer 60 surrounds at least part of the precast track bed assembly 10 to protect the precast track bed assembly 10 and enhance the stability of the track structure.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

It should be noted that the terms "first" and "second" in the specification and claims of the application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those clearly listed. Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

For ease of description, spatially relative terms can be used here, such as "above", "above", "above the surface", "above", etc., to describe as shown in the figure Shows the spatial positional relationship between one device or feature and other devices or features. It should be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device described in the figure. For example, if the device in the drawing is turned upside down, then a device described as "above other devices or structures" or "above other devices or structures" will then be positioned as "below the other devices or structures" or "on Under other devices or structures". Thus, the exemplary term "above" can include both orientations "above" and "below". The device can also be positioned in other different ways (rotated by 90 degrees or in other orientations), and the relative description of the space used here will be explained accordingly.

The above are only preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

A track structure, characterized in that it comprises:

Precast ballast bed assemblies (10), the precast ballast bed assemblies (10) are multiple, and the multiple precast track bed assemblies (10) are arranged at intervals along a first predetermined direction;

A steel rail (20), the steel rail (20) is fixedly arranged on the plurality of precast track bed assemblies (10).
The track structure according to claim 1, wherein the precast track bed assembly (10) comprises:

The curing track bed (11), the curing track bed (11) is two, the two curing track beds (11) are spaced apart along a second predetermined direction, and the first predetermined direction and the second predetermined direction are perpendicular to each other ；

A sleeper (12), the first end of the sleeper (12) is set on one of the curing track beds (11), and the second end of the sleeper (12) is set on the other curing track bed (11), The steel rail (20) is arranged on the sleeper (12).
The track structure according to claim 2, wherein the cured track bed (11) is a polyurethane cured track bed.
The track structure according to claim 2, wherein the precast track bed assembly (10) further comprises:

Fastener (13), at least part of the fastener (13) passes through the rail (20) and the sleeper (12) to fix the rail (20) to the sleeper (12) .
The track structure according to any one of claims 1 to 4, wherein the track structure further comprises:

The packing layer (30) is provided with the packing layer (30) between each of the two adjacent precast track bed assemblies (10), so as to fill the two adjacent holes through the packing layer (30). The gap between the precast track bed components (10) is described.
The track structure according to claim 5, wherein the filling layer (30) comprises ballast.
The track structure according to any one of claims 1 to 4, wherein the track structure further comprises:

The drainage assembly (40), the drainage assembly (40) is arranged on the side of the precast track bed assembly (10), and the water inlet end of the drainage assembly (40) is in communication with the precast track bed assembly (10) to The water in the precast track bed assembly (10) is drained through the drainage assembly (40).
The track structure according to claim 7, wherein the track structure further comprises:

An adjustment layer (50), the adjustment layer (50) is arranged on the base surface, the adjustment layer (50) is arranged under the precast track bed assembly (10) and connected with the precast track bed assembly (10), The height of the adjustment layer (50) relative to the base surface is adjustable to adjust the height of the precast track bed assembly (10) relative to the base surface.
The track structure according to claim 8, characterized in that the drainage assembly (40) comprises a drainage groove (41), and the drainage groove (41) is arranged on the adjustment layer (50) away from the base surface. On the surface, the drainage groove (41) extends along a second predetermined direction, and the first predetermined direction is perpendicular to the second predetermined direction.
The track structure according to claim 9, wherein the track structure further comprises:

A protective layer (60), the protective layer (60) is arranged on the outer side of the prefabricated track bed assembly (10), and the drainage groove (41) extends along the second predetermined direction to the protective layer (60) On the surface.