JP3589448B2 - π-shaped sleeper and labor-saving orbit structure using the sleeper - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a sleeper and a track structure for reducing the construction cost of railways and saving labor for maintenance.
[0002]
[Prior art]
Conventionally, tracks laid on concrete floor boards or roadbed concrete are filled with ballast tracks made mainly of sleepers and ballast, and cement asphalt mortar is used as a cushioning material between precast concrete slabs for supporting rails and floor concrete. Slab track, elastic sleeper track, etc. are adopted.
[0003]
Ballast tracks have low construction costs, are easy to lay, and are easy to adjust for track irregularities.However, deformations caused by repeated train loads must be constantly repaired. It is necessary to maintain a high level of maintenance, and ballast replacement is required for deterioration due to repeated loads, which requires a lot of cost and labor.
[0004]
For this reason, slab tracks and elastic sleeper-direct tracks are currently being developed as labor-saving tracks. In these labor-saving orbits, noise and vibration of structures are large or expensive.
[0005]
[Problems to be solved by the invention]
In the conventional labor-saving track, noise and vibration of the structure are large, or noise and vibration of the structure are similar to ballast track, but there is a problem that the construction cost is high.
[0006]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and provides a sleeper and a maintenance work labor-saving type track structure capable of maintaining a noise reduction function and a function of reducing vibration transmission of a structure while reducing costs. The purpose is to.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the π-shaped sleeper of the present invention has a notch formed at a lower portion of a central portion between rails in a sleeper straddling between rails that does not receive a train load, and at a lower portion of both ends of the rail. It is characterized in that a notch provided with a slip stopper and a side wall portion of the height-adjusting concrete is formed, and a portion immediately below the rail to which a train load is applied is made convex.
[0008]
In addition, the labor-saving track structure using the π-shaped sleeper of the present invention is such that the sleeper provided on the concrete floor slab and the sleeper provided on the height-adjusting concrete are located below the central portion between the rails where the train load is not applied. It is a π-shaped sleeper having a notch on the lower side of the rail and both ends of the rail and having a convex portion just below the rail where a train load is applied, and an elastic material is attached to a surface of the convex portion of the sleeper, The side wall of the concrete for preventing displacement and height adjustment is provided in a notch below both ends of the rail of the sleeper.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described.
FIG. 1 shows a sleeper of a length spanning between rails, wherein a notch is provided at a lower portion below a central portion between the rails and a lower portion outside a portion where the elastic material is attached (a lower portion at both ends of the rail) to form a π shape. 1A is a perspective view, and FIG. 1B is a side view. Reference numeral 1 denotes a sleeper having a π shape, reference numeral 2 denotes a rail fastening device, and reference numeral 3 denotes a rail.
[0010]
The train load on the sleepers is almost directly below the rails, and not much else. The part to which the train load is not so applied is originally unnecessary due to stress. Therefore, as shown in FIG. 1, the central portion between the rails to which no load is applied and the lower surface of the sleeper outside the rail are cut out to form a π shape, thereby reducing the weight of the sleeper. As described above, by adopting a structure in which unnecessary portions are cut off in terms of stress, the sleeper can be reduced in weight and the manufacturing cost can be reduced.
[0011]
FIG. 2 is a diagram showing an example of a labor-saving orbit structure using a π-shaped sleeper, FIG. 2 (a) is a plan view, FIG. 2 (b) is a cross-sectional view taken along line AA of FIG. 2 (a), The same reference numerals as those in FIG. 1 indicate the same contents. In addition, 4 is a concrete floor slab, 5 is a concrete for preventing slippage and height adjustment, 6 is an elastic material, 7 is a trimming material, and 8 is a holding bolt.
[0012]
In the example shown in FIG. 2, a π-shaped sleeper 1 to which an elastic material 6 and a trimming material 7 are attached is arranged on a concrete floor slab 4 at predetermined positions and intervals. The sleeper 1 is factory-produced, and the vibration is reduced by interposing the elastic material 6 on the lower surface, the vibration damping function is provided, and the vibration noise of the structure is reduced. Next, the rail fastening device 2 is installed on the sleeper 1 and the rail 3 is fastened to the sleeper 1. At this time, since the both ends of the rail 3 are supported, the sleeper 1 is hung on the lower surface of the rail, and is held at the height by the holding bolt 8 of the sleeper 1 as needed. Next, a formwork is installed, and a slip-stopping and height-adjusting concrete 5 serving as a sleeper cradle is directly cast on the concrete floor slab 4, cured, and railed on the slip-stopping and height-adjusting concrete 5. Is fixed. At this time, the edge-stopping member 7 prevents the gap and the height-adjustable concrete 5 from coming into direct contact with the sleeper 1. By integrating the rail, the sleeper, the slip stopper and the height-adjusting concrete in this way, the rail can be reliably fixed, so that the track is not deformed and the track maintenance can be saved.
[0013]
In the conventional method using no sleeper, the lateral movement of the sleeper is prevented by the displacement and the side wall extending to the sleeper end of the height-adjusting concrete 5 has been prevented. However, in the present invention, since the sleeper 1 has a π-shaped shape, it is possible to install the side walls of the sleeper and the height-adjusting concrete 5 at the cut-out portions at both ends of the sleeper. This eliminates the need for a side wall that extends, thereby shortening the construction period and reducing construction costs. In addition, the inner and outer forms of the concrete to prevent displacement and height adjustment can be made constant height in the track direction, the outer form is adjusted to the end of the sleeper, and the inner form is a complex form. Eliminating processing and complicated assembly can shorten the construction period and reduce the construction cost.
[0014]
【The invention's effect】
According to the first aspect of the present invention, the unnecessary portion due to the stress is cut off, so that the sleeper manufacturing cost can be reduced. In addition, since the sleeper weight is reduced, transportation and arrangement on a track become easy, and the number of construction days and the construction cost can be reduced.
[0015]
According to the invention of claim 2, in the displacement prevention and the construction of the height-adjusting concrete, the height of the inner / outer formwork can be made constant in the line direction, and the outer formwork is provided at the end of the sleeper. In addition, the inner formwork eliminates complicated formwork processing and complicated assembly, thereby shortening the construction period and reducing construction costs. Also, the sleeper can be prevented from moving in the lateral direction by engaging with the sleeper cradle concrete, which has the function of preventing the slippage and height adjustment provided directly below the sleeper rail. The width of the certain stopper and the height-adjusting concrete can be set to the length of the sleeper, so that a conventional side wall extending to the end of the sleeper is not required, thereby shortening the construction period and reducing the construction cost.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an example of a sleeper having a π shape.
FIG. 2 is a diagram showing an example of a maintenance work labor-saving trajectory using sleepers having a π shape.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... sleepy made into (pi) shape, 2 ... rail fastening device, 3 ... rail, 4 ... concrete floor slab, 5 ... concrete and height adjustment concrete, 6 ... elastic material, 7 ... edging material, 8 ... holding bolt.

Claims (2)

In the sleeper that spans between the rails, a notch is formed below the center part between the rails where the train load is not applied, and a notch is provided at the lower side of both ends of the rail and a side wall of the concrete and height adjustment concrete is provided. A π-shaped sleeper which is formed and has a convex shape immediately below a rail to which a train load is applied . The sleepers installed on the concrete floor slabs and the sleepers provided on the height-adjusting concrete have cutouts at the lower part of the center between the rails where the train load is not applied and the lower sides of both ends of the rail, directly under the rail where the train load is applied The sleeper is a π-shaped sleeper having a convex portion, and an elastic material is attached to a surface of the convex portion of the sleeper, and the side walls of the stopper and the height-adjusting concrete are located on both sides of the rail at both ends of the sleeper. A labor-saving orbital structure using a π-shaped sleeper, which is provided in a cutout portion of.

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