JP3884855B2 - Seam structure in ladder sleeper orbit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seam structure in a ladder sleeper track, and more particularly relates to a seam structure in a ladder sleeper track that is inexpensive, has good workability, and can significantly improve the settlement of a ballast roadbed.
[0002]
[Prior art]
In recent years, ladder sleepers have been proposed as a route structure of a train or the like, which has extremely good load bearing performance and left-right stability compared to a conventional horizontal sleeper track.
This ladder sleeper is a so-called ladder sleeper in which a concrete longitudinal beam and a steel pipe joint are integrated by concrete driving, and has a mixed rigid structure that continuously supports and restrains the longitudinal direction of the rail.
[0003]
[Problems to be solved by the invention]
By the way, as the structure of the joint part of the ladder sleeper track as described above, the both ends of the concrete vertical beam are made continuous by mechanical joining by frictional joining of the attached steel plate and high strength bolt, and the ballast road subsidence Although measures have been taken, there are problems such as expensive joining plates and a lot of labor and time for installation work.
[0004]
In addition, in the case of a seam structure that does not use a joint plate, the sinking of the ballast road bed at the seam is larger than the center of the ladder sleeper (vertical beam), making it difficult to support and restrain the rail in a stable state. There was a problem to say.
The present invention has been devised by paying attention to such conventional problems, and is cheaper and easier to work than steel plate joints, and can significantly improve the settlement of the ballast roadbed. It is an object of the present invention to provide a seam structure in a ladder sleeper track that can be performed extremely easily.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a support formed of a plate-shaped rigid body at the lower ends of both ends of the longitudinal beam at the joint portion of the ladder sleeper track, and the support is a plate-shaped rigid body. In addition, the gist of the present invention is that a plate-like rubber-like elastic body is disposed on the upper and lower surfaces of the elastic members and is integrally formed to have a predetermined thickness .
[0006]
In addition, it is possible to use a single support that supports two vertical beams at the joint portion at the same time, or a divided support that supports two vertical beams individually. Further, when the support is formed integrally with a plate-shaped rigid body and plate-like rubber-like elastic bodies on the upper and lower surfaces thereof to have a predetermined thickness, the support is formed between the vertical beam side and the ballast mat side. It is also possible to change the thickness or change the rubber hardness of the rubber-like elastic body .
[0007]
The present invention is configured as described above, and a support formed of a plate-like rigid body at the lower ends of the longitudinal beams of the joint portion of the ladder sleeper track, or a plate-like rigid body and plate-like rubber on the upper and lower surfaces thereof By installing a support that is integrally formed to a predetermined thickness with a cylindrical elastic body installed, it is cheaper and more workable than conventional steel plate joint plates, and when steel plate joint plates are not used Compared to this, the settlement of the ballast road bed can be greatly improved, and track maintenance can be performed very easily.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic perspective view of a ladder sleeper track installed on a ballast mat G embodying the present invention, 1a and 1b are concrete longitudinal beams, and 2 is longitudinal beams 1a and 1b connected at predetermined intervals. A rail 4 is laid on the longitudinal beams 1a and 1b via a belt-like track pad 3 formed of a rubber-like elastic body or the like. These are supported and fixed on the vertical beams 1a and 1b via a plurality of fasteners 5. In addition, Q has shown the sleeper pad formed with the rubber-like elastic body.
[0009]
As shown in FIGS. 1 to 3, plate-like supports formed of rigid bodies such as precast concrete, iron plate, fiber reinforced plastic are provided at both lower portions of the longitudinal beams 1a and 1b of the seam portion X of the ladder sleeper raceway. A body 6 (for example, a width of 300 mm, a length of 1,600 mm, and a thickness of 30 mm of an iron plate support) is disposed.
In the embodiment shown in FIGS. 1 to 3, a predetermined gap H is provided in the joint portion X of the longitudinal beams 1a and 1b. However, as shown in FIG. 4, the joint portion X of the longitudinal beams 1a and 1b. It is also possible to interpose a gap member 7 made of a rubber-like elastic body.
[0010]
Further, as another embodiment of the support 6a, as shown in FIGS. 4 and 5, a plate-like rigid body 8 such as precast concrete, iron plate, fiber reinforced plastic and the like and plate-like rubber on the upper and lower surfaces thereof. It is also possible to form the elastic bodies 9a and 9b integrally and to have a predetermined thickness T.
In this case, the thicknesses t ₁ and t ₂ of the rubber-like elastic bodies 9a and 9b on the vertical beams 1a and 1b side and the ballast mat G side are changed, or the rubber hardness of the rubber-like elastic bodies 9a and 9b is changed. It is also possible to configure.
For example, when the total thickness T of the support 6a is 60 mm, the thickness t ₁ of the rubber-like elastic bodies 9a and 9b is 10 mm, t ₂ is 20 mm, and the rubber hardness is 80:40. It is.
[0011]
Furthermore, as another embodiment of the support bodies 6 and 6a, in the above-described embodiment, the support bodies 6 and 6a use a single object that simultaneously supports the two vertical beams 1a and 1b in the joint portion X. As shown in FIGS. 6 and 7, it is also possible to use divided supports 10a and 10b that individually support the two vertical beams 1a and 1b.
The present invention is configured as described above, and a support body 6 formed of a plate-like rigid body or a plate-like rigid body 8 and its lower portion at both ends of the longitudinal beams 1a and 1b of the seam portion X of the ladder sleeper raceway. By installing plate-like rubber-like elastic bodies 9a and 9b on the upper and lower surfaces and providing a support body 6a integrally formed to a predetermined thickness, it is cheaper and more workable than conventional steel plate joint plates. Compared to the case where a steel plate joint plate is not used, the settlement of the ballast road bed can be greatly improved, and track maintenance can be performed very easily.
[0012]
【The invention's effect】
The present invention, as described above, the support formed of a plate-like rigid body is disposed at the lower ends of both ends of the longitudinal beam at the joint portion of the ladder sleeper track, the support is a plate-like rigid body, The plate-like rubber-like elastic bodies are arranged on the upper and lower surfaces and are integrally formed to a predetermined thickness. Therefore , it is cheaper and more workable than the conventional steel plate joint plate, and the conventional steel plate joint. Compared to the case where no plate is used, the settlement of the ballast road bed can be greatly improved, and the track maintenance can be managed very easily.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a ladder sleeper track installed on a ballast mat G embodying the present invention.
FIG. 2 is a plan view of a seam portion of a ladder sleeper track showing a first embodiment of the present invention.
FIG. 3 is a front view of FIG. 2;
FIG. 4 is a cross-sectional view of a seam portion of a ladder sleeper track showing a second embodiment of the present invention.
FIG. 5 is an enlarged cross-sectional view of a support in a second embodiment of the present invention.
FIG. 6 is a plan view of a seam portion of a ladder sleeper track showing a third embodiment of the present invention.
7 is a front view of FIG. 6. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1a, 1b Longitudinal beam 2 Steel pipe joint material 3 Track pad 4 Rail 5 Fastening bracket 6 Support body 7 Gap member 8 Rigid body 9a, 9b Rubber-like elastic body G Ballast mat X Ladder sleeper track joint

Claims (3)

In the seam structure in the ladder sleeper track formed by integrally forming two vertical beams and steel pipe joints to a predetermined length by placing concrete, and laying and fixing rails in parallel on the vertical beams,
A support body formed of a plate-like rigid body is disposed at both ends of the vertical beam at the joint portion of the ladder sleeper track, and the support body is formed of a plate-like rigid body and plate-like rigid bodies on the upper and lower surfaces thereof. A seam structure in a ladder sleeper track , wherein a rubber-like elastic body is disposed and integrally formed to a predetermined thickness . 2. The joint structure in a ladder sleeper track according to claim 1, wherein the support body is one that supports two longitudinal beams at a joint portion at the same time or one that supports two longitudinal beams individually. 3. When the support is formed integrally with a plate-like rigid body and plate-like rubber-like elastic bodies on the upper and lower surfaces thereof to a predetermined thickness, the wall thickness between the vertical beam side and the ballast mat side The seam structure in the ladder sleeper track according to claim 1 or 2, wherein the structure is changed by changing the rubber hardness of the rubber-like elastic body.

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