JP3396251B2 - How to lay sleepers - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of laying a sleeper . 2. Description of the Related Art When the transportation power of a railroad train is increased, the load condition applied to the railroad becomes severe, but lateral pressure is applied to the rail at the branch and the curve when passing through the train. In particular, in the case of a ballast orbit, a lateral shift of the orbit is likely to occur. [0003] Therefore, in the case of a PC sleeper, a rubber plate is stuck on the laying surface at the bottom of the sleeper so as to increase the frictional resistance with the ballast track, and to reduce the displacement of the sleeper and, consequently, the lateral displacement of the track. I was [0004] However, most of the on-site rubber plate attachment work is performed at night, so that the attachment surface of the PC sleeper is often wet by night dew or the like, and the attachment cannot be performed.
There was a problem that sufficient adhesive strength could not be obtained. Further, the attached rubber plate was also easily peeled. On the other hand, in the case of wooden or synthetic sleepers, rails are laid directly on a ballast roadbed without sticking a rubber plate or the like. In the curve section, the rails were likely to shift sideways, and track correction work had to be carried out frequently. [0006] In order to solve these problems, it has been proposed to increase the frictional resistance by providing a groove on the track bed laying surface of the sleeper body in a direction intersecting the longitudinal direction of the sleeper body, and to prevent the lateral movement of the sleeper. (4-891)
No. 01). In many cases, sleepers are replaced and replaced with those already laid for repair and replacement. In this case, the ballast around the sleepers is removed and the sleepers are removed. A new sleeper is placed on it and ballast is put in it, and it is compacted with a tie tamper. By the way, the sleeper is such that the concave groove of its laying surface meshes with the ballast to increase the frictional resistance. When the sleeper is laid on site as described above, it is expected from the test results of the experimental site. The anti-lateral slippage resistance was not obtained. [0007] The present invention solves the above-mentioned problems and allows trains to pass through.
It is an object of the present invention to provide a method of laying a sleeper having high resistance to side slip at the time . In the method of laying a sleeper according to the present invention, a ridge having a trapezoidal cross section is provided on a track bed laying surface of the sleeper body so as to intersect in a longitudinal direction of the sleeper body. Using a sleeper whose side surface on the side of the lateral pressure applied to the rail when passing through the train is an inclined surface, the sleeper is turned down on the surface on which the convex line is provided, and the inclined surface of the convex line The ballast is placed in the installation groove of the ballast ballast so that the side is on the side of the lateral pressure applied to the rail, the ballast is put around it, compacted with a tie tamper , and the part close to the slope of the ridge is Inclination
The ballast is densely filled by being guided on a slope . [0009] The material of the sleeper is not particularly limited.
Synthetic wood and the like can be mentioned. Examples of the synthetic wood include a thermosetting resin foam reinforced with long fibers such as glass roving. A plurality of ridges can be provided. Of these, at least one ridge may be provided with the above-mentioned slope, but it is preferable to provide all the ridges with the above-mentioned slope. In addition, not only the side surface on the side of the lateral pressure applied to the rail when the train passes but also the side surface on the opposite side may be inclined. The ridge is preferably provided over the entire width of the sleeper body, and is preferably substantially perpendicular to the longitudinal direction of the sleeper body. When there are two or more ridges, two of them are preferably provided on the back surface of the rail fixing portion. The height of the ridge is not particularly limited, but is preferably in the range of 1/3 to 3 of the average particle size of the ballast. In forming the ridge having the above-mentioned inclined surface, a trapezoidal or triangular plate-like body or a block body is preferably used. By fixing these plate-like bodies to the roadbed laying surface of the sleeper body, a ridge having an inclined surface is formed. Examples of the fixing method include a chemical fixing method such as bonding and a physical fixing method such as bolt and nut fixing. In addition, there is an advantage that it can be assembled on site if it can be detachably fixed. The material of the plate-like body or the block body may be the same material as that of the sleeper body to which it is fixed, or may be a different material. For example, ABS or FR
A reinforced plastic such as P is preferably used. The ridges may also be formed by a method of simultaneously and integrally forming the tie body and the ridges, or a method of cutting the roadbed laying surface of the ridges of the tie. The sleeper is placed in the installation groove of the ballast roadbed so that the surface on which the ridge is provided faces downward, and the inclined surface of the ridge is on the side of the lateral pressure applied to the rail. It is laid by putting ballast around it and compacting it with a tie tamper. At the time of compaction, the ballast is guided by the slope of the ridge and easily enters, and the ballast at that portion is densely filled. As described above, the ballast densely filled on the inclined surface side of the ridge has a large resistance against the lateral displacement force applied when passing through the rail. Side shift is prevented. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an embodiment of the method of laying a sleeper according to the present invention. In FIG. 1, 1 is a sleeper main body, and 2 is a ridge. The sleeper body 1 is made of synthetic wood made of glass long fiber reinforced hard urethane resin foam, and has the size of a usual sleeper (width 240 mm, length 2600 mm,
(Height: 150 mm). Roadbed laying surface on the lower surface of the rail fixing portion of this sleeper body 1 (lower surface in the drawing)
Are provided with two ridges 2, 2 in a direction perpendicular to the major axis. Each of the ridges 2 and 2 is a columnar body (width: 140 m) having a trapezoidal cross section in which one side surface is inclined at an angle of about 70 °.
m, height: 40 mm, length: 240 mm) are formed by attaching the inclined surfaces 3, 3 to the same side and attaching them to the roadbed laying surface of the sleeper body 1. The material of the ridge 2 is a long glass fiber reinforced hard urethane resin foam like the sleeper body 1.
As described above, if the material of the ridge 2 is made the same as that of the sleeper body 1 and has the above-described dimensions, the material to be used for the sleeper body 1 can be used, and there is an advantage that material management becomes easy. FIG. 2 is a partial side view of a sleeper in which both side surfaces of the ridge are inclined surfaces, wherein 1a is a sleeper body and 2a is a ridge. This sleeper is the same size as the sleeper of FIG. 1, and both sides of the ridge 2a are inclined surfaces 3a, 3a . If the side surfaces of the ridge are inclined as described above, the ballasts 4 to be filled in the portions a and b adjacent to both sides of the ridge become dense. Can be laid without considering the direction of lateral pressure applied to Next, an example of a method of laying a sleeper according to the present invention using the sleeper shown in FIG. 1 will be described. As shown in FIG. 1, the sleeper body 1 is placed with the surface on which the ridges 2, 2 are provided downward, and the inclined surfaces 3, 3 of the ridge 2 are on the side of the lateral pressure direction (the direction of the arrow in FIG. 1) applied to the rail. The ballast 4 is placed in the installation groove of the ballast ballast, and the ballast 4 is put around the ballast ballast and compacted with a tie tamper. At the time of this compaction, the inclined surfaces 3, 3
The ballast 4 is easily guided into the portions a, a adjacent to the ballast 4 by the inclined surfaces 3, 3. As a result, the inclined surfaces 3, 3
The ballast is densely packed compared to the packing density of the ballast filled in the opposite part of the ballast. As described above, the ballasts 4 of the portions a, a adjacent to the inclined surfaces 3, 3 of the ridges 2 are densely filled. As a result, the sleeper body 1 has a large resistance to the lateral pressure applied to the rails. As shown in the figure, the sleeper is less likely to be displaced in the longitudinal direction, and lateral displacement of the track is prevented. As described above, in the method of laying a sleeper according to the present invention, a portion close to the inclined surface side of the ridge having a trapezoidal cross section is densely filled with ballast and added to the rail. Since it exhibits a large resistance to the lateral displacement force, it is difficult to displace in the longitudinal direction, and the effect of preventing the lateral displacement of the track becomes large.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view illustrating an example of a method of laying a sleeper according to the present invention. FIG. 2 is a partial side view illustrating a method of laying a sleeper of another example . [Description of Signs] 1, 1a Sleeper main body, 2, 2a Convex ridge 3, 3a Inclined surface 4 Ballast trackbed

Claims (1)

(57) [Claims] (Claim 1) A ridge having a trapezoidal cross section is provided on the track bed laying surface of the sleeper body so as to intersect in the longitudinal direction of the sleeper body. The side pressure on the side of the lateral pressure direction side that is applied to the rail is used as a slope. Place the ballast in the installation groove of the ballast ballast so that it is on the direction side, put ballast around it, compact it with a tie tamper , and get close to the slope of the ridge
The laying method of sleepers, wherein the this <br/> to densely packed induced was in ballast to the inclined surface.