CN216891771U

CN216891771U - Be applied to ballast bed structure that floating slab ballast bed reformed transform

Info

Publication number: CN216891771U
Application number: CN202220020304.4U
Authority: CN
Inventors: 吴俊�
Original assignee: China Railway Shanghai Design Institute Group Co Ltd
Current assignee: China Railway Shanghai Design Institute Group Co Ltd
Priority date: 2022-01-06
Filing date: 2022-01-06
Publication date: 2022-07-05
Anticipated expiration: 2032-01-06

Abstract

The utility model relates to the technical field of track traffic construction, in particular to a track bed structure applied to the transformation of a floating slab track bed, which comprises a concrete thin short sleeper and a secondary pouring layer, wherein the secondary pouring layer covers the chiseling range of the existing cast-in-place floating slab, the chiseling range of the existing cast-in-place floating slab is from a boss edge to a slab edge, the concrete thin short sleeper is embedded in the secondary pouring layer and is arranged below a steel rail, and the steel rail is arranged on the secondary pouring layer through a fastener system of the steel rail. The utility model has the advantages that: the structure of the existing floating plate is slightly damaged, the improvement effect is good, the working state of the existing floating plate track is greatly improved, and the service life is ensured; simple and reasonable structure, convenient construction and suitability for popularization.

Description

Be applied to ballast bed structure that floating slab ballast bed reformed transform

Technical Field

The utility model relates to the technical field of rail transit construction, in particular to a ballast bed structure applied to the transformation of a floating slab ballast bed.

Background

The floating slab track bed is used in special vibration damping areas with high vibration damping requirements, and a fastener direct-buried scheme is adopted in the early stage. The construction quality control of the direct-buried track bed is difficult, the phenomena of skew of an iron base plate, hanging empty, overrun of a rail base slope and the like are common, the track geometric state is poor, particularly in a small-radius curve section, the vibration of the track bed in a floating plate area is increased, the phenomena of T-shaped bolt failure, elastic strip flying out, iron base plate breakage and other diseases, noise increase in a vehicle, serious vehicle shaking and the like occur, and great pressure is brought to operation, maintenance and repair.

Disclosure of Invention

The utility model aims to provide a track bed structure applied to the transformation of a floating slab track bed according to the defects of the prior art, and the effective transformation of the existing floating slab track bed is realized by adding a concrete thin short sleeper and matching with the old and profitable of the existing cast-in-place floating slab track bed and only locally chiseling plate bodies in the range from the slab edge to the boss edge of the existing cast-in-place floating slab.

The purpose of the utility model is realized by the following technical scheme:

the utility model provides a be applied to ballast bed structure that floating slab ballast bed reformed transform, includes existing cast-in-place floating slab, existing cast-in-place floating slab sets up on existing ballast bed, the top of existing cast-in-place floating slab is provided with rail and fastener system, its characterized in that: the ballast bed structure comprises a concrete thin short sleeper and a secondary pouring layer, wherein the secondary pouring layer covers the chiseling range of the existing cast-in-place floating slab, the chiseling range of the existing cast-in-place floating slab is from a boss edge to a slab edge, the concrete thin short sleeper is embedded in the secondary pouring layer and arranged below the steel rail, and the steel rail is installed on the secondary pouring layer through a fastener system of the steel rail.

And reinforcing steel bars are arranged on the bottom surface of the concrete thin type short sleeper and are embedded in the secondary pouring layer and connected with the reinforcing steel bars of the existing ballast bed.

The reinforcing steel bar is of a bending structure, and the bending direction of the reinforcing steel bar is consistent with the line direction.

And a bidirectional reinforcing mesh is laid in the secondary pouring layer and avoids the concrete thin short sleeper.

And a height-adjusting base plate is arranged below the steel rail.

The utility model has the advantages that: the structure of the existing floating plate is slightly damaged, the improvement effect is good, the working state of the existing floating plate track is greatly improved, and the service life is ensured; simple and reasonable structure, convenient construction and suitability for popularization.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a floor plan of the present invention;

FIG. 3 is an enlarged view of a portion of the floating slab track bed before modification;

FIG. 4 is a partially enlarged view of the floating slab track bed after the reforming;

FIG. 5 is an enlarged view of a portion of the floating slab track bed after being raised;

fig. 6 is a schematic structural view of a concrete thin type short sleeper in the present invention.

Detailed Description

The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:

as shown in fig. 1-6, the labels 1-13 are respectively shown as: the steel rail comprises a steel rail 1, a fastener system 2, a concrete thin short sleeper 3, a floating slab track bed 4, a vibration isolator 5, an existing floating slab track bed 6, a chiseling range 7, existing track bed steel bars 8, existing cast-in-situ floating slab boss edges 9, existing cast-in-situ floating slab plate edges 10, a secondary pouring layer 11, reinforcing steel bars 12 and a height-adjusting base plate 13.

Example (b): as shown in fig. 1 and 2, the track bed structure applied to the modification of the floating slab track bed in the embodiment is used for modifying the existing floating slab track bed shown in fig. 3, so as to improve the working state and ensure the service life of the existing floating slab track bed. Specifically, a rail 1 and a clip system 2 thereof are mounted above an existing floating ballast bed 6, and the rail 1 is mounted on the existing floating ballast bed 6 through the clip system 2. The existing ballast bed reinforcing steel bars 8 are arranged inside the existing floating slab ballast bed 6.

Compared with fig. 3 and 4, the track bed structure body applied to the transformation of the floating slab track bed in the embodiment comprises the concrete thin-type short sleeper 3 and the secondary pouring layer 11. The secondary pouring layer 11 is arranged in a chiseling range of the existing floating slab track bed 6, the chiseling range is a range from a boss edge 9 of the existing cast-in-situ floating slab to an edge 10 of the existing cast-in-situ floating slab, and the chiseling depth is at least larger than the embedding depth of a fixing bolt of the fastener system 2; in fig. 3, the puncturing range 7 is indicated by a dashed box.

As shown in fig. 4, a concrete low sleeper 3 is provided in the chiseled area 7, and the concrete low sleeper 3 is installed below the rail 1 and the fastener system 2 thereof, and after installation, the rail 1 can be supported above the concrete low sleeper 3 by casting the concrete low sleeper 3 into an integral structure by a secondary casting layer 11. The overall structure of the reformed floating plate track bed 4 is shown in fig. 1 and fig. 2, and the working state is greatly improved.

In this embodiment, the effective reconstruction of the existing floating slab track bed 6 is realized by adding the concrete thin short sleeper 3 and matching with the old benefit of the existing cast-in-place floating slab track bed and only locally chiseling the slab body in the range from the slab edge of the existing cast-in-place floating slab to the boss edge. In the chiseling process, the existing ballast bed reinforcing steel bars 8 in the existing floating ballast bed 6 can be cut off if necessary.

As shown in fig. 4 and 6, a reinforcing steel bar 12 is disposed below the concrete thin sleeper 3, and the reinforcing steel bar 12 has a bending structure, and the bending direction of the reinforcing steel bar 12 is consistent with the extending direction of the steel rail 1, i.e., the line direction, so as to enhance the connectivity and integrity between the concrete thin sleeper 3 and the secondary casting layer 11. In this embodiment, two bending-type reinforcing bars 12 with opposite bending directions are respectively disposed on both sides below the concrete thin sleeper 3, and the reinforcing bars can be connected to the reinforcing bars of the existing floating slab track bed 6 to further ensure the working performance of the concrete thin sleeper 3.

In the embodiment, the height of the concrete thin sleeper 3 can be designed according to the actual situation, but the concrete thin sleeper 3 should be buried below the secondary casting layer 11 to a certain depth to meet the strength requirement; when the depth of the chiseling range 7 cannot meet the requirement, the chiseling range can be realized by heightening the bed surface of the existing track. As shown in fig. 5, when the height of the steel rail 1 is increased by adding the height-adjusting tie plate 13, the concrete thin-type short sleeper 3 with the appropriate height should be selected according to the distance between the height-adjusting tie plate and the upper layer steel bar of the existing floating slab track bed 6.

In the embodiment, in specific implementation: as shown in fig. 2, a vibration isolator 5 is further provided between adjacent concrete low profile bolsters 3, and the vibration isolator 5 is used for vibration isolation between the adjacent concrete low profile bolsters 3. Therefore, when the existing floating slab track bed 6 is chiseled, the position of the vibration isolator 5 should be considered, and interference of the chiseled concrete thin sleeper 3 or the concrete thin sleeper 3 installed at a later stage with the position of the vibration isolator 5 is avoided.

And a bidirectional reinforcing mesh can be laid in the secondary pouring layer 11 and arranged to avoid the concrete thin short sleeper 3 so as to improve the strength of the secondary pouring layer 11. The secondary pouring layer 11 can adopt cement-based quick-hardening grouting material, the state of the steel rail needs to be retested before pouring, and the next construction is carried out after the requirements are met.

When reforming transform existing floating slab track bed, can overhaul its system simultaneously, for example: detecting the stress of the shear hinge; checking and cleaning the performance; overhauling the components; the loss part is replaced, the working state of the existing floating slab track is greatly improved through the overhauling and transformation, and the service life is ensured.

Although the conception and the embodiments of the present invention have been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made therein without departing from the scope of the appended claims, and therefore, the description is not necessary here.

Claims

1. The utility model provides a be applied to ballast bed structure that floating slab ballast bed reformed transform, includes existing cast-in-place floating slab, existing cast-in-place floating slab sets up on existing ballast bed, the top of existing cast-in-place floating slab is provided with rail and fastener system, its characterized in that: the ballast bed structure comprises a concrete thin short sleeper and a secondary pouring layer, wherein the secondary pouring layer covers the chiseling range of the existing cast-in-place floating slab, the chiseling range of the existing cast-in-place floating slab is from a boss edge to a slab edge, the concrete thin short sleeper is embedded in the secondary pouring layer and arranged below the steel rail, and the steel rail is installed on the secondary pouring layer through a fastener system of the steel rail.

2. The track bed structure applied to the reconstruction of the floating slab track bed as claimed in claim 1, wherein: and reinforcing steel bars are arranged on the bottom surface of the concrete thin type short sleeper and are embedded in the secondary pouring layer and connected with the reinforcing steel bars of the existing ballast bed.

3. The track bed structure applied to the reconstruction of the floating slab track bed as claimed in claim 2, wherein: the reinforcing steel bar is of a bending structure, and the bending direction of the reinforcing steel bar is consistent with the line direction.

4. The track bed structure applied to the reconstruction of the floating slab track bed as claimed in claim 1, wherein: and a bidirectional reinforcing mesh is laid in the secondary pouring layer and avoids the concrete thin short sleeper.

5. The track bed structure applied to the reconstruction of the floating slab track bed as claimed in claim 1, wherein: and a height-adjusting base plate is arranged below the steel rail.