JP2008291420A - Prestressing ballast track structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a prestressing ballast track structure which applies balanced prestress to track bed ballast by providing a prestressing rod between a rail and a roadbed. <P>SOLUTION: This prestressing ballast track structure, which is provided with a prestressing member 5 fixed to the rail 4 and the roadbed 1, is equipped with a structure which applies the balanced prestress to the track bed ballast 2 between the rail 4 and the roadbed 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a prestressed ballast track structure.

  Conventionally, as a technology in such a field, a prestress member fixed to a rail support and a roadbed is provided, and a structure is provided that prestresses a roadbed ballast between the rail support and the roadbed. A prestressed ballast track structure has been proposed (see Patent Document 1 below).

  FIG. 11 is a view showing a conventional prestressed ballast track structure.

  In this figure, 101 is a roadbed, 102 is a roadbed ballast, 103 is a sleeper, 104 is a rail, and 105 is a pre-stress rod disposed between the roadbed 101 and the sleeper 103.

This pressed ballast track has a structure that suppresses track settlement by applying prestress to the roadbed ballast 102 between the rail support body (sleeper) 103 and the roadbed 101.
Japanese Patent No. 3798210

  However, in the above-mentioned presto ballast track, as shown in FIG. 11, prestress could not be effectively applied to the sleepers 103A and 103B not provided with the prestress rod 105.

  In view of the above situation, an object of the present invention is to provide a prestressed ballast track structure capable of applying prestress balanced to a roadbed ballast by providing a prestress rod between a rail and a roadbed.

In order to achieve the above object, the present invention provides
[1] A prestress ballast track structure is characterized in that a prestress member fixed to the rail and the roadbed is provided, and a structure is provided between the rail and the roadbed to give a prestress balanced to the roadbed ballast.

  [2] The prestress ballast track structure according to [1], wherein an insulating member is interposed in a fixing portion between the rail and the prestress member so that no current flows through the prestress member. To do.

  [3] The prestress ballast track structure according to [1], wherein an insulator is disposed on the prestress member so that no current flows through the prestress member.

  [4] The prestress ballast track structure according to [1], wherein the prestress member itself is an insulating member so that no current flows through the prestress member.

  ADVANTAGE OF THE INVENTION According to this invention, the prestress ballast track structure which gives the prestress which balanced the roadbed ballast by providing a prestress rod between a rail and a roadbed can be provided.

  In addition, in the conventional method, a prestress rod is attached to a rail support such as a sleeper. Therefore, the rail support must be designed, and the rail fastening device acts to pull down the rail. The design of the equipment was necessary. On the other hand, in the method of the present invention, since the prestress is applied vertically downward to the rail, a load similar to a normal train load acts on the rail support and the rail fastening device. Can be prestressed as it is.

  The prestressed ballast track structure of the present invention includes a structure in which a prestress member fixed to a rail and a roadbed is provided, and a prestress balanced to the roadbed ballast is applied between the rail and the roadbed.

  Hereinafter, embodiments of the present invention will be described in detail.

  FIG. 1 is a view showing a prestressed ballast track structure according to a first embodiment of the present invention, and FIG. 2 is a view showing a tip portion of a prestress rod according to the present invention.

  In this figure, 1 is a roadbed, 2 is a roadbed ballast placed on the roadbed 1, 3 is a sleeper placed on the roadbed ballast 2, 4 is a rail placed on the sleeper 3, and this rail 4 is , A rail head 4A, a rail abdomen 4B, a rail bottom 4C, a rail upper neck 4D, and a rail lower neck 4E. Reference numeral 5 denotes a prestress rod as a prestress member disposed between the roadbed 1 and the bottom 4C of the rail 4. In addition, since signal current etc. are flowing through the rail 4, it is necessary to take insulation. Here, as shown in FIG. 2, an insulating member 6 is disposed at the tip of the prestress rod 5 for fixing the rail 4 so as to obtain insulation.

  FIG. 3 is a view showing a prestressing rod (No. 1) according to the present invention.

  Here, the insulator 7 is arranged to insulate the prestress rod 5 in the middle.

  FIG. 4 is a view showing a prestressing rod (No. 2) according to the present invention.

  Here, the prestress rod itself is configured as a prestress rod 8 made of an insulator, for example, an insulator such as vinylon or aramid.

  FIG. 5 is a plan view showing a prestressed ballast track structure according to the second embodiment of the present invention, and FIG. 6 is a cross-sectional view taken along line AA of FIG.

  In this embodiment, as shown in these drawings, the roadbed 10 is composed of a reaction plate 12 with a rubber 11, provided with a roadbed ballast 13, on which a sleeper 14 as a rail support is disposed, A rail 15 is laid so as to be passed to the large sleeper 14. The rubber 11 may not be provided.

  Therefore, in this embodiment, the reaction force plate 12 is provided with an anchor portion serving as a hinge, and a pair of prestress wires 17 as prestress members are stretched for each rail 15 and fixed by the fixing member 18. The prestress wire 17 is disposed so as to be inclined in a direction along the sleeper 14 so as to sandwich the rail 15 on both sides of the bottom of the rail 15.

  FIG. 7 is a plan view showing a prestressed ballast track structure according to a third embodiment of the present invention, and FIG. 8 is a sectional view taken along line BB in FIG.

  In this embodiment, the prestress wire 21 as a prestress member is arranged so as to be inclined along the rail 15 so as to improve the resistance in the vertical direction. That is, the prestress wire 21 is arranged at the bottom of the rail 15 so as to cross the longitudinal direction of the rail, and is fastened and fixed by the fixing member 22.

  FIG. 9 is a diagram showing a state of a moving load loading test of the rail joint portion, and FIG. 10 is a diagram showing a result of the moving load loading test of the rail joint portion.

  Here, the EPS road bed 31 (part of the road bed 32) is H = 400 mm, the road bed 32 is H = 60 mm, the road bed ballast 33 is H = 50 mm, 34 is a sleeper, 35 is a rail, and 36 is a rail joint. , 37 indicates a prestressing rod.

  The result of the moving load loading test of the rail joint portion 36 in this state is as shown in FIG. 10. As a result of releasing the pre-stress after loading 70,000 times, the amount of settlement of the track increased.

  As described above, according to the present invention, since the prestress rod is arranged between the roadbed and the rail, it is possible to give a prestress balanced to the roadbed ballast.

  In addition, this invention is not limited to the said Example, Based on the meaning of this invention, a various deformation | transformation is possible and these are not excluded from the scope of the present invention.

  The prestressed ballast track structure of the present invention can be used as a prestressed ballast track structure that applies prestress balanced to the roadbed ballast.

It is a figure which shows the prestress ballast track structure which shows 1st Example of this invention. It is a figure which shows the front-end | tip part of the prestress rod concerning this invention. It is a figure which shows the prestress rod (the 1) concerning this invention. It is a figure which shows the prestress rod (the 2) concerning this invention. It is a top view which shows the prestress ballast track structure which shows 2nd Example of this invention. It is the sectional view on the AA line of FIG. It is a top view which shows the prestress ballast track structure which shows 3rd Example of this invention. It is the BB sectional view taken on the line of FIG. It is a figure which shows the state of the moving load loading test of a rail joint part. It is a figure which shows the result of the moving load loading test of a rail joint part. It is a figure which shows the conventional prestress ballast track structure.

Explanation of symbols

1,10,32 Subbase 2,13,33 Roadbed ballast 3,34 Sleeper 4,15,35 Rail 4A Rail head 4B Rail abdomen 4C Rail bottom 4D Rail top neck 4E Rail bottom neck 5 Prestress Rod (pre-stress member)
6 Insulating member 7 Insulator 8 Prestress rod made of insulator 11 Rubber 12 Reaction force plate 14 Large sleeper 16 Anchor portion 17, 21 Prestress wire (prestress member)
18,22 Fixed member 31 EPS subgrade (part of subbase)
36 Rail joint 37 Prestressed rod

Claims (4)

  A prestressed ballast track structure comprising a prestress member fixed to a rail and a roadbed, and a structure for applying a prestress balanced between the rail and the roadbed to a roadbed ballast.   The prestress ballast track structure according to claim 1, wherein an insulating member is interposed in a fixed portion between the rail and the prestress member so that no current flows through the prestress member. Orbit structure.   2. The prestressed ballast track structure according to claim 1, wherein an insulator is disposed on the prestress member so that no current flows through the prestress member.   2. The prestress ballast track structure according to claim 1, wherein the prestress member itself is an insulating member so that no current flows through the prestress member.

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