KR20120011511A

KR20120011511A - Sleeper having waved bottom surface

Info

Publication number: KR20120011511A
Application number: KR1020100073350A
Authority: KR
Inventors: 이지하
Original assignee: 한국철도기술연구원
Priority date: 2010-07-29
Filing date: 2010-07-29
Publication date: 2012-02-08

Abstract

In order to increase the contact area between the sleeper bottom surface and the gravel top surface, the sleeper bottom surface is processed into a sinusoidal waveform bottom surface to increase the contact area of the sleeper bottom, and the elastic pad having a predetermined thickness is attached to the bed. The present invention relates to a sleeper having a corrugated bottom surface which enlarges the ground area of gravel and sleeper bottom surface.
According to the present invention, it is possible to effectively increase the number of gravel supporting the lower part of the sleeper, and the lateral frictional force of the sleeper can be minimized, thereby effectively preventing the fracture and wear of the gravel and the sleeper bottom due to the contact of the gravel and the sleeper edge. Can be. In addition, the present invention is the vertical direction of the mechanical resistance of the bottom surface, and by biting the gravel up and down staggered on the bottom surface to significantly improve the bonding force between the sleeper and the gravel gravel. In addition, according to the present invention, the floating sleeper phenomenon is prevented, and an excellent effect of further improving the adhesion of the upper surface of the gravel is obtained.

Description

SLEEPER HAVING WAVED BOTTOM SURFACE}

The present invention relates to a concrete sleeper that supports the rail in a gravel trajectory, and more specifically, the sleeper bottom is processed into a sinusoidal waveform bottom to increase the contact area between the sleeper bottom and the gravel top. Increase the contact area of the gravel and sleeper floor by increasing the contact area of the floor and attaching elastic pads of certain thickness to improve the cohesion of the gravel and sleeper, minimizing the breakage of gravel and sleeper, and preventing floating sleepers To a sleeper having a corrugated bottom that is improved to

In general, in a gravel trajectory, concrete sleepers are placed on the gravel to support the rails.

Such sleepers deliver the load of the train on the gravel to distribute the vertical load of the train to the roadbed and the roadbed below, and the conventional sleepers have a flat bottom and only partially touch the gravel on the road. Occurs.

If the gravel does not support a large area at the bottom of the sleeper, but only a small area, the load in the vertical direction is concentrated due to the repetitive load of the train, and the gravel is more crushed or struck down so that the space between the sleeper and the top of the gravel is Space occurs.

That is, as shown in Figure 1a, the gravel 10 is installed in the lower portion of the concrete sleeper (1) having a flat bottom surface of the trapezoidal cross-section to support the concrete sleeper (1), the conventional concrete sleeper (1) The bottom surface is formed in a horizontal plane has a problem that the gravel 10 in contact with the bottom surface does not support the bottom of the sleeper wide.

Therefore, in the conventional concrete sleeper 1, when the train passes repeatedly, the sleeper moves up and down due to the vertical load of the train, and when time passes, the gravel 10 sinks and the space 12 below the sleeper expands. do.

Eventually, the concrete sleeper (1) after a certain period of time, the rise of the sleeper with the space 12 is formed on the lower surface, and the sleeper where such a phenomenon occurs is called the sleeper (1a), over the sleeper (1a) Whenever the train passes, the sleeper moves up and down and the degree becomes more severe, and the ride feeling deteriorates. Excessive shock is transmitted to the sleeper when the train passes, thereby increasing the amount of maintenance and increasing the maintenance cost.

In addition, in the section in which the floater 1a is frequently generated, a vertical displacement occurs in the rail which is supported by the sleeper, and thus the track distortion is advanced, thereby causing a problem of increased track breakage.

As shown in Figure 1b, another type of concrete sleeper 20 is proposed, which relates to the "multi-functional concrete sleeper" of the Republic of Korea Utility Model Model No. 20-0393763, the railroad tracks due to the load on the train In order to minimize deformation and to ensure sufficient resistance of the track, the multifunctional improved concrete sleepers that can prevent the buckling of the track and the linear twist of the track are introduced.

The conventional multifunctional improved concrete sleeper 20 has a sleeper body 22 having a trapezoidal cross section whose width gradually decreases in the height direction to distribute the load, and the sleeper body 22 is grounded. In order to increase the area, it is a configuration including a plurality of angular anti-slip unevenness 26 formed on the bottom surface.

The conventional multifunctional improved concrete sleeper 20 is formed on the lower surface of the concrete sleeper to form a concave-convex (26) acting as a vertical bulkhead to resist the lateral force (P1) on the sleeper body 22 gravel (28 Can be said to be supported.

This configuration may be effective in preventing the concrete sleepers 20 from sliding in the lateral direction by expanding the lateral friction force of the anti-slip unevenness 26 formed on the lower surface of the sleeper body 22, but in particular in the vertical load There is a problem in that the action for distributing a larger area to the gravel under the sleeper cannot be expected.

That is, the bottom of both bottom edges of the sleeper bottom plate of Figure 1b is in the form of a horizontal plane (A1), the irregularities 26 are formed, the horizontal surface (A2) is formed again, the irregularities 26 are formed again In addition, it can be seen that the horizontal plane A3 is formed again. In this case, the gravel 28 which is in contact with each of the horizontal planes A1, A2, and A3 has to be settled again by a train, etc. (12) is formed, so this problem arises that the uneven sleeper plate can not effectively share the vertical load to the gravel.

Eventually, if spaced unevenness 26 is formed in the sleeper bottom plate, the contact area with some gravel may be increased, but as long as the horizontal surface remains, a floating space 12 for the actual vertical load is generated. The sleepers can be unequally sinked, indicating that the actual effect is not significant.

In addition, the sleeper bottom plate of the conventional uneven shape is broken and wear of the bottom of the sleeper by the contact between the lower inner surface (C) of the sleeper and the gravel 28, there is a lot of room for defects of the sleeper, corners (B) is angled, there was a problem that there is a lot of room to be damaged by impact while in contact with the gravel.

Also, FIG. 2A proposes a conventional technique having a different structure.

This relates to the "concrete elastic sleepers" of the Republic of Korea Utility Model Publication No. 1994-0000285, the elastic plate 60 is attached to both sides of the bottom surface of the body 52 of the concrete elastic sleepers 50 and with the gravel 62 below By increasing the friction coefficient to absorb vibration so that there is no vibration as in the prior art to increase the ride comfort, the elastic plate 60 is to reduce the wear rate of the gravel 62 relatively.

The conventional concrete elastic sleeper 50 increases the frictional resistance with the gravel 62 by the elastic plate 60 so that there is no buckling of the track so as to prevent the derailment of the train in advance and to ensure safe operation. It is a technology that can reduce the labor and financial loss due to the loss of gravel (62) of 5% per year.

However, the elastic plate 60 has a function to improve the frictional resistance with the gravel, but also the bottom of the elastic plate 60 is formed in the form of a horizontal plate is virtually no problem in expanding the contact area with the gravel There was also a problem that can not be expected to distribute the vertical load to the gravel of the lower part of the sleeper to a larger area.

In addition, another conventional technique of FIG. 2B is proposed.

This prior art relates to the "dustproof pad for prestressed concrete sleepers" of the Republic of Korea Patent No. 10-0622069, which is attached to the lower surface of the body 72 of the PC sleeper 70 is installed on the gravel of the railway tracks The dustproof pad 80 for prestressed concrete sleepers to damp the vibration of the.

Such a conventional anti-vibration pad 80 is disposed on the base plate 84 having the same planar structure as the shape of the lower surface of the body 72 of the PC sleeper 70, and a predetermined interval on the upper surface of the base plate 84. A plurality of fixing protrusions 86 protruding upwardly are integrally formed, and the base plate 84 and the fixing protrusions 86 are made of a polyurethane-based synthetic resin material having elasticity.

The anti-vibration pad 80 of the prior art is integrally installed at the lower part of the prestressed concrete sleeper 70 installed in the gravel-shaped track 90 to distribute the load of the traveling train, and to reduce noise and vibration. And an excellent effect can be obtained to minimize the maintenance.

However, the anti-vibration pad 80 also has a problem that its bottom is formed in the form of a horizontal plate, so that the contact area with the gravel has no great effect, and also to distribute the vertical load to the gravel under the sleeper in a larger area. There was a problem that can not expect the action.

As a result, all of these conventional techniques introduce a technique for forming irregularities on the bottom of the sleeper for the purpose of expanding the contact area in the sleeper, but in particular, the technology for effectively transferring the vertical load acting on the sleeper to the gravel has been improved. Had not introduced the problem.

An object of the present invention is to solve the above-described problems, the gravel supporting the sleeper to contact the entire sleeper bottom plate substantially prevents the sleeper phenomenon caused by preventing the fall of the ride comfort of the train, It is possible to reduce maintenance costs by preventing breakage, and to provide sleepers with an improved corrugated bottom surface to prevent train accidents such as track derailment by preventing track distortion.

In addition, another object of the present invention, by improving the contact area between the sleeper bottom surface and the pebble top surface of the bottom, to improve the binding force of the sleeper bottom surface and the gravel gravel, and improved corrugated floor to minimize the breakage of gravel and sleepers To provide sleepers with cotton.

According to an aspect of the present invention,

A sleeper that holds a rail in a gravel trajectory, the body having a body portion, and the bottom surface of the body portion so that the sinusoidal waveform bottom surface is continuously formed in the longitudinal and transverse directions of the sleeper, respectively,

The gravel is disposed on the entire surface of the corrugated floor to be in contact with each other up and down in the longitudinal and transverse direction to provide a sleeper having a corrugated bottom surface so that the vertical load acting on the sleeper is distributed to the whole gravel disposed below the corrugated floor. Done.

That is, by forming the bottom plate of the sleeper to the corrugated bottom surface, but continuously formed over the entire bottom plate, so that the gravel is staggered across the bottom plate of the sleeper, it is possible to increase the number of gravel contacting the bottom plate basically. While the gravel is supporting the entire surface of the bottom plate, the pebbles in contact with the corrugated bottom plate are interlocked with each other, so that the bond strength between the sleepers and the gravel can be increased, thereby improving the load bearing ability against vertical loads. To reduce the chance of uneven settlement of sleepers.

Also preferably, the sleepers are made of concrete having a trapezoidal cross section. This can be produced in a variety of forms using the formwork, when using the bottom formwork for the corrugated bottom plate to facilitate the production of the sleeper of the present invention.

In addition, preferably, the cross-sectional dimension of the sleeper can be changed in various ways, but the particle size of the gravel used is limited, so in order to effectively secure the dispersion effect on the vertical load, the corrugated bottom surface has a wavelength in the longitudinal and transverse directions, respectively. It is provided with a sleeper having a corrugated bottom surface formed of 140mm to 160mm, the upper and lower width of 55mm to 70mm to allow the ground gravel having a maximum particle diameter of 63mm or less.

In addition, preferably the elastic pad is further attached to the bottom of the corrugated bottom, the elastic pad is made of a rubber material of 10mm to 30mm thick to provide a sleeper having a corrugated bottom surface to enhance the adhesion and gravel.

The elastic pad is further formed on the bottom of the corrugated bottom surface to enhance adhesion with gravel. Since the adhesive force is also secured by the shape of the corrugated bottom plate, the adhesive force enhancement effect is increased in comparison with the elastic pad in the form of a horizontal plate.

According to the present invention, the sleeper's bottom surface is made of sine-wave-shaped wave form, which is a continuous curve, and when the vertical load of the train is applied, the gravel disposed on the bottom of the sleeper while expanding the area supporting the sleeper Since they cross each other, not only can the dispersion capacity for vertical load be enhanced, but also the lateral frictional force of the sleeper can be minimized, and the conventional uneven sleeper bottom plate is in contact with the bottom of both sides of the sleeper and gravel. As the crushing and wear of the lower surface of the sleeper is generated, the present invention can effectively prevent the occurrence of cracking due to the contact between the gravel and the edge of the sleeper.

In addition, according to the present invention, the bottom surface is formed in such a sine wave-like wave shape, so the mechanical resistance direction of the bottom surface is vertical, and the shape minimizes the resistance in the lateral direction and minimizes the contact area in the vertical direction. It is in the form of maximization. Therefore, the sleeper of the present invention is to stagger the phase gravel up and down on the bottom surface to significantly improve the bonding force between the sleeper and the phase gravel.

As described above, according to the present invention, the lower surface of the concrete sleeper is processed in the same waveform as the wave shape of the sine wave in a straight line, so that the support area of approximately 3.14 (circumferential ratio) / 2 = 1.67 times is increased to support the sleeper. As the number of gravel increases, floating sleepers are alleviated.

In addition, according to the present invention, by attaching an elastic pad having a wavy shape to the bottom surface of the sleeper, the adhesion between the upper surface of the gravel can be further improved.

Figure 1a is an explanatory view showing a problem that the floating sleeper is formed by the lifting space is formed in the lower part of the sleeper in the concrete sleeper according to the prior art.
Figure 1b is an explanatory view showing a structure that resists the lateral force (P1) by forming a plurality of anti-slip irregularities on the bottom in the multi-functional improved concrete sleepers according to the prior art.
Figure 2a is a perspective view to reduce the wear rate of the gravel by attaching the elastic plate on the lower surface of the body in the elastic elastic sleeper according to the prior art.
2B is an explanatory view showing a structure in which a dustproof pad is attached to a lower surface of a body in a dustproof pad for prestressed concrete sleepers according to the related art to distribute a load of a traveling train, and minimize noise, vibration, and maintenance.
3 is a perspective view illustrating a sleeper having a corrugated bottom surface according to the present invention.
Figure 4a is a side view showing a sleeper having a wavy bottom in accordance with the present invention.
4B is a front view illustrating a sleeper having a corrugated bottom surface in accordance with the present invention.
Figure 5a is an explanatory view showing that the mechanical resistance direction of the bottom surface in the vertical direction with respect to the vertical load of the train in the sleeper having a wavy bottom surface according to the present invention.
Figure 5b is an explanatory diagram showing a structure that can effectively increase the number of gravel to support the lower part of the sleeper in the sleeper having a corrugated bottom surface in accordance with the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

The sleeper 100 having a corrugated bottom surface according to the present invention is a sleeper that holds a rail in a gravel trajectory, as shown in FIG. 3, and has a body portion 110 having a trapezoidal cross section. The bottom surface of the unit 110 is a waveform bottom surface 120 each having a sinusoidal wave shape.

The corrugated bottom surface 120 has a wavelength (a) in the longitudinal direction S1 and the transverse direction S2, preferably as shown in Figs. 4A and 4B, respectively, from 140 mm to 160 mm, the upper and lower Width (b) is 55mm to 70mm is configured to ground the gravel 130 of the maximum particle diameter (d) 63mm or less in the inside.

Since the corrugated bottom surface 120 has a particle diameter d of 63 mm at the bottom of the in-vehicle gravel 130 laid on the lower portion thereof, the sine wave has a wavelength of 140 mm to 160 mm, most preferably 150 mm. It is before and after.

In addition, the upper and lower width (b) is preferably formed in 55mm to 70mm, and most preferably 60mm so that the gravel 130 of the maximum particle size (d) can be sufficiently grounded.

Since the sleeper 100 having the corrugated bottom surface 120 according to the present invention configured as described above has a wavy shape having a sinusoidal wave shape having a flexible curved bottom surface, as shown in FIG. 5A, a train When the vertical load (P2) of the action, the mechanical resistance direction (P3) of the bottom surface is in the vertical direction, the shape is made in the form of minimizing the resistance in the transverse direction (S2), maximizing the vertical contact area.

In other words, the bottom plate of the sleeper to form a corrugated bottom surface 120, but continuously formed throughout the bottom plate,

The gravel 130 was placed across the entire bottom plate of the sleeper 100 to basically increase the number of gravel in contact with the bottom plate significantly,

While the gravel 130 supports the entire surface of the corrugated bottom surface 120, the pebbles in contact with the corrugated bottom surface are interlocked with each other, thereby increasing the coupling force between the sleepers and the gravel, thereby improving load-bearing capacity for vertical loads. It is designed to reduce the chance of uneven settlement of sleepers caused by passing trains.

As described above, the corrugated bottom surface 120 is formed by processing the entire bottom surface of the sleeper 100 in the longitudinal direction and the transverse direction in the shape of a wave of a sine wave in a straight line (horizontal plane). 2 = 1.67 times the support area is increased to increase the number of gravel 130 to support the sleeper 100, so the sleeper (1a) phenomenon is alleviated.

In this case, as shown in FIG. 5B, the corrugated bottom surface 120 is grounded on at least seven or more of the gravel 130 having a maximum particle diameter (d) of 63 mm or less in the transverse direction (S2). It is desirable to be supported by).

4B and 5B, the sleeper 100 having a corrugated bottom surface according to the present invention includes an elastic pad 140 having a convex shape on the bottom surface thereof, including an adhesive (not shown) or a separate anchor (not shown). By adhering, the adhesion between the upper surface of the gravel 130 can be further improved.

The elastic pad 140 is made of a cushioning material including a rubber of 10mm to 30mm thick, and greatly improves the adhesion between the upper surface and the gravel 130 due to its excellent material properties of friction.

Such an elastic pad 140 is in the form of a convex pad, and has sufficient strength to support the load of the train.

As described above, in the present invention, the sleeper bottom surface is made of a sinusoidal waveform bottom surface 120 having a flexible curve, and when the vertical load (P2) of the train is applied, the sleeper is enlarged by expanding the area for supporting the sleeper (100). ) The number of gravel 130 supporting the lower side can be effectively increased, and the lateral (S2) frictional force of the sleeper 100 can be minimized by the gravel due to the contact of the gravel 130 and the edge of the sleeper 100. The crushing and abrasion of the lower surface of the 130 and the sleeper 100 can be effectively prevented.

As a result, in the present invention, the bottom surface of the sleeper is formed in the form of such a sine wave, so that the mechanical main resistance direction P3 of the bottom surface is vertical, and the shape of the sleeper is formed in the transverse direction S2. To minimize and maximize the vertical contact area,

It can be seen that the sleeper 100 of the present invention greatly improves the bonding force between the sleeper 100 and the bed gravel 130 by staggering the bed gravel 130 up and down on its bottom surface.

Even if quantitatively examined, the present invention is processed from the bottom surface of the concrete sleeper 100 to the waveform bottom surface 120 of the sine wave in a straight line, so that the support area of 3.14 (circumferential ratio) / 2 = 1.67 times of the horizontal surface As the number of the gravel 130 to support the sleeper 100 is increased as shown in Figure 5b, the maximum grain size (d) based on the island-like gravel 130 of 63mm or less of the conventional six to seven because it is floating It was confirmed that the sleeper (1a) phenomenon is alleviated.

And according to the present invention by attaching the elastic pad 140 of the convex shape to the bottom surface of the sleeper 100 can further improve the adhesion between the top surface of the gravel 130.

An embodiment of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications are within the scope of the present invention as long as they are obvious to those skilled in the art.

1 ...... concrete sleepers 1a ...... knitted sleepers
10 ....... gravel 12 ..... clear
20 ...... multifunctional improved concrete sleeper 22 ...... sleeper body
26 ...... Anti-slip irregularities 28 ...... Gravel
50 ...... concrete elastic sleepers 52 ...... body
60 ...... elastic plate 62 ...... gravel
70 ...... PC sleeper 72 ....... Body
80 ...... dustproof pad 84 ...... base plate
86 ...... settling projection 90 ...... gravel
100 ..... Sleeper with corrugated bottom 110 ..... Body
120 ..... Wavy features 130 ..... icon gravel
140 ..... elastic pads a ....... wavelength
b ...... up and down d ....... particle diameter
P1 ...... lateral force P2 ...... vertical load
P3 ...... Dynamic resistance direction S1 ...... Long direction
S2 ...... Transverse

Claims

A sleeper 100 supporting a rail in a gravel trajectory, having a body portion 110, the bottom surface of the body portion being a sinusoidal waveform bottom surface 120 continuously in the longitudinal and transverse directions of the sleeper, respectively. By forming
The gravel 130 on the entire corrugated bottom surface 120 is disposed so as to be in contact with each other in the vertical and transverse directions vertically and horizontally so that the vertical load acting on the sleeper is distributed to the whole gravel disposed under the corrugated bottom surface. Sleepers having a corrugated bottom surface.

The sleeper according to claim 1, wherein the body portion (110) is made of concrete having a trapezoidal cross section.

According to claim 1 or 2, The corrugated bottom surface 120 is formed in the longitudinal and transverse wavelengths of 140mm to 160mm, respectively, the upper and lower width of 55mm to 70mm phase gravel having a maximum particle diameter of 63mm or less Sleeper having a corrugated bottom surface, characterized in that 130 is grounded.

According to claim 3, wherein the bottom surface of the corrugated bottom 120 is further attached to the elastic pad 140, the elastic pad is made of a rubber material of 10mm to 30mm thickness corrugated, characterized in that to promote adhesion with gravel Sleepers with bottom surface.