KR102394040B1 - Under sleeper pad for rail ballast using rubber pad with penetration hole, and construction method thereof - Google Patents

Abstract

Disclosed are a sleeper pad using a nonwoven fabric fusion type rubber pad and a construction method thereof. According to the present invention, by fusing the non-woven fabric of the sleeper pad, in which the non-woven fabric and the rubber pad are integrally formed, to the bottom of a concrete sleeper, it is possible to secure the adhesive force between the rubber pad and the concrete sleeper, and to adjust the embedment depth of the rubber pad on the surface of the concrete sleeper, thereby effectively securing the manufacturing quality of sleeper pads.

Description

Sleeper pad using perforated rubber pad and its construction method

The present invention relates to a sleeper pad using a perforated rubber pad. More specifically, in manufacturing a sleeper pad in which a nonwoven fabric and a rubber pad are integrally formed with each other and a concrete sleeper are attached to each other, a perforated hole is formed to communicate with the surface layer (bottom) of the concrete sleeper, the nonwoven fabric, and the rubber pad to make the cement of the concrete sleeper. The present invention relates to a sleeper pad using a perforated rubber pad, in which the paste (P) penetrates into a perforated hole to increase the adhesion area of the sleeper pad, thereby improving the adhesion performance of the concrete sleeper and the sleeper pad, and a construction method therefor.

1A shows an exemplary view of a wide sleeper 10 having a nonwoven fabric attached to its bottom surface according to the related art.

As shown in FIG. 1A , in the wide sleepers 10 and 10 to which the nonwoven fabric according to the prior art is attached to the bottom, both wide portions 12 are formed between the central portions 11 of the sleeper, and the rail fastening device is seated. The part 13 is a sleeper formed at both ends, and at this time, a nonwoven fabric (Geotextile: 14) is pre-attached to the bottom surface of both wide parts 12 .

In this case, the nonwoven fabric can partially correct the construction error during roadbed construction, and also can efficiently transmit the load to the lower roadbed by absorbing the impact of the train load. In addition, the nonwoven fabric transmits the train load evenly to the road bed to prevent fracture due to stress concentration in advance, and improves the frictional resistance between the bottom surface of a wide sleeper made of concrete and the road bed. can be controlled. The nonwoven fabric has a relatively flat upper surface and is installed between the elastic roadbed and the wide sleeper 10, thereby ensuring load transmission and friction resistance.

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Figure 1b is a view illustrating the installation of the anti-vibration pad 21 used on the gravel road according to the prior art.

As shown in Fig. 1b, the anti-vibration pad 21 used on the gravel road according to the prior art is provided on the bottom surface of the concrete sleeper 20, which is an intermediate medium between the rail 25 and the gravel 22, and such The anti-vibration pad 21 may be manufactured by forming a special cloth layer 21b on the bottom surface of the rubber layer 21a.

At this time, the rubber layer 21 is composed of a compounding rubber 21a made of EPDM (Ethylene Propylene Diene Monomer) and a special fabric layer 21b stacked to cross each other, where the special fabric layer 21b is a nylon tire cord. Cord) or polyester tire cord (Polyestertire Cord) or aramid fiber (Aramid Fiber) is formed by coating the compounding rubber (21d) on the special fabric (21c) made of alone or in combination of two or more.

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In this way, a molded article in which the compounding rubber 21a and the special fabric layer 21b are laminated to cross each other is inserted into a mold and vulcanized (or vulcanized) for 20 to 70 minutes at a press temperature of 140 to 220 ° C. It is possible to manufacture the anti-vibration pad 21 secured.

The anti-vibration pad 21 is attached to the bottom surface of the concrete sleeper 20 through an adhesive or an adhesive tape made of butyl rubber, a cement primer, or a cement adhesive.

The anti-vibration pad 21 may be attached to the entire bottom surface of the concrete sleeper 20 , both ends or central portions, or may be inserted into the bottom surface of the concrete sleeper 20 .

Accordingly, the anti-vibration pad 21 is installed on a concrete sleeper installed on a gravel road, and in particular, is used to reduce vibration and noise during the passage of a train.

1c and 1d show an exemplary view of a vibration-proof sleeper pad for a railway gravel track according to the prior art.

As shown in Fig. 1c, the anti-vibration sleeper pad for railroad gravel track according to the prior art includes a base plate 21 having the same planar structure as the shape of the lower surface of the concrete sleeper 20, and the base plate 21. A plurality of fixing protrusions 26 that are disposed on the upper surface at predetermined intervals and protrude upward are integrally formed, and the base plate 21 may have a shape in which the base plate 21 is symmetrically divided into two halves.

In addition, as shown in FIG. 1D , the length or width of the pad is long due to an error in the manufacture of the pad or tolerance in the manufacture of the concrete sleeper 20, which may cause a phenomenon to be caught in the formwork during installation in the concrete sleeper, thus reducing vibration. The anti-vibration sleeper pad is formed to have a size smaller than the lower surface of the concrete sleeper 20 within the range where the effect deterioration can be prevented.

1e is a configuration example of a sleeper pad 30 for concrete according to the prior art.

At this time, as shown in FIG. 1E , a perforated hole 32 may be formed in the elastic pad 31 , and as the perforated hole 32 is formed, the elastic pad 31 is pressed (F) when As the area is expanded (AA) than the conventional area (A) of the elastic pad (31), the contact area of the elastic pad (30) on the track is expanded in various ways according to the load conditions, thereby generating uniform deflection of the rail.
Therefore, in the conventional sleeper pad attached to the concrete sleeper bottom on a gravel road, in order to prevent vibration, transmission load distribution, and breakage at the contact surface, the adhesion force between the concrete sleeper bottom and the sleeper pad and the expansion of the contact area are important in the manufacture of the sleeper pad. It can be seen that ensuring quality is very important.

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Republic of Korea Patent No. 10-1061078 (Title of the invention: elastic pad for concrete track turn-off, publication date: August 31, 2011) Republic of Korea Patent Publication No. 2015-111547 (Title of the invention: Wide sleeper for direct-connected track on asphalt roadbed and its construction method, publication date: October 6, 2015) Republic of Korea Patent Publication No. 2014-11762 (Title of the invention: vibration-proof pad for concrete sleepers, publication date: January 29, 2014) Republic of Korea Patent No. 10-699548 (Title of the invention: Anti-vibration sleeper pad for railroad gravel tracks, publication date: March 8, 2007)

Accordingly, in the present invention, in addition to making the rubber pad and the nonwoven fabric integrated with each other through mechanical bonding, rubber crosslinking reaction, and chemical bonding of the contact surface through heating and pressing, the nonwoven fabric and the surface of the concrete sleeper are easily fused to each other, but the rubber pad By maximizing the adhesion between the concrete sleeper and the sleeper pad by increasing the contact area between the sleeper and the concrete sleeper, it is possible to secure an even and high adhesion over the entire area of the sleeper pad, and to improve the flatness of the sleeper pad to improve the quality of the sleeper with the pad. It is a technical task to solve the provision of a sleeper pad and its construction method using a perforated rubber pad.

In addition, the present invention uses a pressure plate that prevents the rubber pad of the sleeper pad from being buried in the surface of the concrete sleeper by more than a certain depth, so that the manufacturing quality of the sleeper pad can be kept constant, so that the perforated rubber pad is more effective for quality control. The provision of sleeper pad and its construction method is another technical problem to be solved.

To solve the above problems, there is provided a sleeper pad using a perforated rubber pad of the present invention, comprising: a nonwoven fabric embedded in a bottom surface of a concrete sleeper; a rubber pad integrated with the nonwoven fabric and exposed to a bottom surface of the concrete sleeper; and a fusion agent comprising cement paste before the concrete sleeper is cured, and penetrating into the nonwoven fabric in the horizontal and vertical directions via the perforated hole formed in the nonwoven fabric to increase the adhesion between the sleeper pad and the concrete sleeper. A sleeper pad, wherein the nonwoven fabric is pressed into a concrete surface poured into a sleeper form, and the sleeper pad is attached to a bottom surface of the concrete sleeper while the poured concrete is cured to secure adhesion to the concrete sleeper; A perforation hole is additionally formed in the rubber pad, and as the fusion agent before curing of the concrete sleeper penetrates to the perforation hole of the rubber pad through the perforation hole of the nonwoven fabric, when the fusion agent is cured, the interface between the nonwoven fabric and the rubber pad The rubber pad is characterized in that the rubber pad of the sleeper pad is uniformly embedded in the surface of the concrete sleeper to a predetermined depth by using a pressure plate provided with a spacer.

Meanwhile, the method for constructing a sleeper pad using a perforated rubber pad of the present invention for solving the above problems includes: a) a nonwoven fabric embedded in a bottom surface of a concrete sleeper; and a rubber pad integrated with the nonwoven fabric and exposed to the bottom surface of the concrete sleeper, wherein the fusion agent containing the cement paste prior to curing the concrete sleeper penetrates the nonwoven fabric in the horizontal and vertical directions through the perforation hole of the nonwoven fabric. manufacturing a sleeper pad using a perforated rubber pad that increases adhesion between the sleeper pad and the concrete sleeper; and b) arranging the concrete sleeper attached to the bottom of the sleeper pad using the perforated rubber pad on the gravel island (A). to prepare a EPDM compounded rubber by winding a nonwoven fabric having a sealed material surface on a roll and separately providing; a-2) forming a sheet by forming the prepared EPDM compounded rubber through a calendar process to prepare a rubber pad, and adhering to the nonwoven fabric; a-3) The rubber pad in close contact with the non-woven fabric is heated and pressed through rotor curing, so that the non-woven fabric and the rubber pad are entangled on the contact surface to achieve close mechanical bonding and vulcanization, and the non-woven fabric and the rubber pad contact surface are melted and dehydrated making the nonwoven fabric and the rubber pad chemically bond while being fused; a-4) injecting or impregnating a fusion agent including an adhesive or cement paste into the nonwoven fabric in order to remove or discharge the residual air inside the nonwoven fabric; and a-5) uniformly cutting the rubber pad and the nonwoven fabric that are integrated mechanically and chemically.

According to the present invention, by using a sleeper pad using a perforated rubber pad, the adhesion force between the concrete sleeper and the sleeper pad can be more effectively secured, and the flatness can be sufficiently secured on the gravel road, thus, the transfer stress to the gravel bedrock. It is possible to reduce gravel abrasion and crushing through reduction, so more economical maintenance of gravel tracks is possible.

According to the present invention, by simply preventing the rubber pad from being embedded at a predetermined depth in the surface of the concrete sleeper, it is possible to maintain a constant manufacturing quality of the sleeper pad.

1a is an exemplary view of a conventional wide sleeper with a nonwoven fabric attached to the bottom;
Figure 1b is an example of installation of a vibration-proof pad used on a gravel road
1c and 1d are exemplary views of a conventional anti-vibration sleeper pad for a railroad gravel track;
1e is a configuration example of an elastic pad for a conventional concrete track splitter;
2a, 2b, 2c, 2d and 2e are a manufacturing example of a sleeper pad using the perforated rubber pad of the present invention, an operational example of the sleeper pad using the perforated rubber pad, and a perforated rubber pad. Configuration examples of the sleeper pad, the sleeper pad using the perforated rubber pad, and the concrete sleeper are shown.
3A and 3B show a construction flow diagram of a sleeper pad using the perforated rubber pad of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement them. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain element, it means that other elements may be further included, rather than excluding other elements, unless otherwise stated.

[Sleep pad (100) using perforated rubber pad]

2a, 2b, 2c, 2d and 2e are a manufacturing example view of the sleeper pad 100 using the perforated rubber pad of the present invention, an operational example of the sleeper pad 100 using the perforated rubber pad; Configuration examples of the sleeper pad 100 using the perforated rubber pad, and the construction example of the sleeper pad 100 and the concrete sleeper 200 using the perforated rubber pad are shown.

First, the sleeper pad 100 using the rubber pad 110, the non-woven fabric 120, the adhesive 130 and the perforated rubber pad manufactured using the perforated holes 140a and 140b is a concrete sleeper 200 surface ( The bottom surface) can be integrated and attached in advance, and hereinafter, it is simply referred to as a sleeper pad.

At this time, the nonwoven fabric 120 combined with the rubber pad 110 is fusion-bonded containing the concrete paste (P) inside the nonwoven fabric 120 in order to solve the decrease in adhesion of the surface of the concrete sleeper 200 due to the internal residual air. The agent 130 in advance is used.

The fusion agent 130 penetrates from the surface of the concrete sleeper 200 into the perforated hole 140a formed in the nonwoven fabric 120 , and also penetrates into the perforated hole 140b formed in the rubber pad 110 , thereby permeating the sleeper. The contact area between the pad 100 and the concrete sleeper 200 is improved, and thus, it is possible to have an effect of increasing adhesion.

In addition, the rubber pad 110 is constructed to be embedded only in the surface of the concrete sleeper 200 to a certain depth, thereby maximizing the action of the rubber pad 110 (load transmission by securing flatness) to sufficiently secure the manufacturing quality.

Accordingly, as shown in FIGS. 2A, 2B, 2C, 2D and 2E, the sleeper pad 100 using the perforated rubber pad has a rubber pad 110, a nonwoven fabric 120, and a fusion agent ( 130) and the perforated holes 140a and 140b, and at this time, the depth of embedding of the perforated rubber pad 110 can be adjusted by using the pressure plate 210 using the spacer 260.

First, referring to FIGS. 1A to 1D , the conventional sleeper pad was attached to the bottom surface of the concrete sleeper 200 using an adhesive or was attached by a fitting method or an anchor fixing method. It can be seen that it is manufactured to have a certain thickness in order to prevent it.

However, if it has an excessive thickness, there is a limit in that economic feasibility cannot be secured, and as it becomes heavy, it is difficult to secure adhesion with the concrete sleeper 200 .

Therefore, it is preferable that the sleeper pad uses a thin plate (in the form of a thin plate or sheet) to sufficiently secure adhesion to the concrete sleeper 200 while ensuring economic efficiency.

However, if the concrete sleeper and adhesion force are not sufficiently secured or flatness is not ensured, damage may occur while contacting the gravel 220 during train load transmission, and a vulnerable part with reduced adhesion performance may occur.

Accordingly, the present invention uses the sleeper pad 100 in which the rubber pad 110 and the nonwoven fabric 120 are integrated with each other, but the rubber pad 110 of the sleeper pad 100 is placed on the surface of the concrete sleeper 200 to a certain depth A pressure plate 210 using a spacer 260 that can more effectively secure the adhesion and flatness of the concrete sleeper 200 and the nonwoven fabric 120 to the uniform embedding is used.

In addition, up to the perforated hole 140b formed in the rubber pad 110, the fusion agent 130 containing the cement paste P before the concrete sleeper 200 is cured is applied to the perforated hole 140b of the nonwoven fabric 120. ), when the adhesive 130 is cured as it penetrates, it can resist the horizontal shear stress generated at the interface between the nonwoven fabric 120 and the rubber pad 110, and the rubber pad 110 and the concrete sleeper 200. By increasing the contact area with the present invention, the adhesion between the sleeper pad 100 and the concrete sleeper 200 can be maximized.

Accordingly, first, a method of manufacturing the sleeper pad 100 in which the rubber pad 110 with the perforated holes 140a and 140b is formed and the nonwoven fabric 120 are integrated with each other will be described with reference to FIG. 2A as follows.

First, the sleeper pad 100 uses a mechanical bond in which the rubber pad 110 and the nonwoven fabric 120 are entangled and in close contact with each other, and a chemical bond by heating and pressing is used to integrate the sleeper pad 100 .

That is, the rubber pad 110 is, as shown in FIG. 2a, for example, EPDM and rubber are used to prepare EPDM compounded rubber using a compounding machine, but separately roll the nonwoven fabric 120 having a sealed material surface ( role) and provided separately.

At this time, the manufactured EPDM compounded rubber is made into a sheet through a calendar process (a process of forming a sheet through heating) and molded to manufacture the rubber pad 110 and adhere to the nonwoven fabric 120. ..

At this time, by further adding the process of forming the perforated holes 140a and 140b in the rubber pad 110 and the nonwoven fabric 120, the perforated holes 140a and 140b are, as shown in FIGS. 2A and 2B, It is formed to penetrate the rubber pad 110 and the nonwoven fabric 120 , and a plurality of them may be formed to be spaced apart from each other.

The actions of the perforated holes 140a and 140b in the rubber pad 110 and the nonwoven fabric 120 are as follows with reference to FIG. 2B .

First, looking at the case in which the cement paste (P) is formed only in the perforation hole (140b) of the nonwoven fabric 120, as shown in FIG. 2b, the cement paste (P) of the concrete sleeper 200 before curing. It can be seen that 130 can penetrate through the perforated hole 140b formed in the nonwoven fabric 120 , and this penetration can be formed in horizontal and vertical directions.

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Therefore, as the horizontal and vertical penetration of the adhesive 130 including the cement paste P occurs inside the nonwoven fabric 120, the contact area between the sleeper pad 100 and the concrete sleeper 200 is increased. can have

Next, looking at the case in which the cement paste P is formed in both the perforation hole 140b of the nonwoven fabric 120 and the perforation hole 140a of the rubber pad 110, as shown in FIG. 2b, before curing The fusing agent 130 including the cement paste P of the concrete sleeper 200 may penetrate into the perforation hole 140a formed in the nonwoven fabric 120 , and this penetration is formed in the horizontal and vertical directions.

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In addition, since the perforated hole 140b of the nonwoven fabric 120 communicates with the perforated hole 140b formed in the rubber pad 110 , the fusion agent 130 including the cement paste P is used in the rubber pad 110 . ) penetrates to the perforated hole 140a.

Accordingly, the rubber pad 110 and the rubber pad 110 and The integrity of the nonwoven fabric 120 can be additionally secured, which also affects the increase in adhesion between the sleeper pad 100 and the concrete sleeper 200 .

Accordingly, the rubber pad 110, which is an EPDM compounded rubber sheet in close contact with the nonwoven fabric 120, is heated and pressed through rotor curing. It becomes entangled and close together (mechanical bonding).

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After that, it is vulcanized while heating (Curing or Sulfur Crosslinking, about 160 to 170 degrees, 600 rpm), so that the physical properties of the rubber pad 110 are improved (crosslinking action) and the contact surface between the nonwoven fabric 120 and the rubber pad 110 is melted As the (melting) and diffusion (Diffusion) is performed, the nonwoven fabric 120 and the rubber pad 110 are completely integrated (chemically coupled) with each other.

As a result, the rubber pad 110 and the nonwoven fabric 120, which are mechanically and chemically combined and integrated, are cut and used to be used as the sleeper pad 100 of the present invention.

At this time, if the rubber pad 110 of the sleeper pad 100 also has a certain strength, for example, when it is formed to a thickness of about 5 mm, the load is basically transmitted from the bottom of the concrete sleeper 200 to the gravel 220 . While doing so, it becomes to the extent that it cannot be damaged by contact with the gravel 220 , and the nonwoven fabric 120 is formed to have a thinner thickness than the rubber pad 110 .

However, when attaching the sleeper pad 100 to the surface of the concrete sleeper 200 in the prior art, the embedding depth of the rubber pad 110 is not constant. there was

Furthermore, in order for the sleeper pad 100 to resist the impact load in the high-frequency region, it is necessary to sufficiently secure the adhesion with the concrete sleeper 200. When using the same fixture, it is not easy to secure the adhesive force, there is a problem of loss of section due to anchor penetration, and when an adhesive is used, it becomes difficult to secure the application quality of the adhesive.

Accordingly, in the present invention, the sleeper pad 100 is manufactured by integrating the concrete sleeper 200 in the process of curing the concrete poured into the formwork when the concrete sleeper 200 is manufactured at the factory. Referring to FIG. 2A , the sleeper pad When the 100 is attached to the surface of the concrete sleeper 200 and integrated, the residual air inside the nonwoven fabric 120 is removed by the fusing agent 130 .

That is, in the curing process of the concrete sleeper 200, the nonwoven fabric 120 and the concrete sleeper 200 are attached to each other, and the air (air) inside the nonwoven fabric 120 prevents this attachment.

Accordingly, as a means for discharging or removing residual air (air) inside the nonwoven fabric 120 , the present invention uses the above-described fusing agent 130 as shown in FIG. 2C .

The fusing agent 130 may include a cement paste (P) and an adhesive, and may be of a method of infiltrating the nonwoven fabric 120 in advance into a portion occupied by residual air inside the nonwoven fabric 120 .

In addition, in order to adjust the embedding depth of the rubber pad 110 integrated by the nonwoven fabric 120 and the fusing agent 130 into the uneven concrete sleeper 200, the present invention, as shown in FIG. 2D, provides a rubber A pressure plate 210 using a spacer 260 to prevent the pad from being embedded in the surface of the concrete sleeper beyond a certain depth is used.

That is, in the present invention, as shown in FIG. 2D , the nonwoven fabric 120 using a separate pressure plate 210 so that the sleeper pad 100 can be set at an even pressure on the concrete C poured into the sleeper formwork. ) is embedded in the concrete surface, and the sleeper pad 100 may be attached to the bottom surface of the concrete sleeper 200 while the concrete C for manufacturing the concrete sleeper 200 is cured.

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At this time, as shown in FIG. 2D , spacers 260 having a predetermined thickness in the form of blocks may be fixed to both ends of the pressure plate 210 .

That is, the rubber pad 110 is in contact with the bottom surface of the pressure plate 210, the nonwoven fabric 120 is integrated on the bottom surface of the rubber pad 110, and when the pressure plate 210 is pressed downward, the spacer 260 is While in contact with the surface of the concrete (C), the nonwoven fabric 120 may be embedded but the rubber pad 110 may be formed to be embedded only to a certain depth by the spacer 150 .

As a result, in the sleeper pad 100 , the embedding depth of the rubber pad 110 can be uniformly formed, thereby reducing the frictional force with the gravel 220 and solving the problem of load transfer, and accordingly, the sleeper pad 100 ) can keep the manufacturing quality constant.

Furthermore, according to FIG. 2a, the nonwoven fabric 120 is a sponge material with a tight surface texture, which is elastic and deformable, and is made of a porous material that is easy to permeate with water contained in concrete to some extent. Concrete sleepers ( 200) During manufacturing, the sleeper pad 100 using the perforated rubber pad functions as a connecting member so that the sleeper pad 100 is integrated with the bottom surface and manufactured.

However, as shown in FIG. 2a , since a large number of residual air (air) is formed inside the nonwoven fabric 120 , the concrete (C) paste does not penetrate to the inside of the nonwoven fabric 120 , so the nonwoven fabric 120 and the concrete (C) There may be difficulties in securing flatness and drop-off due to a decrease in adhesion.

As shown in FIG. 2c , the present invention uses the fusing agent 130 in a manner of impregnating or injecting the adhesive and cement paste P in advance for removal and discharge of the residual air (air) of the nonwoven fabric 120 in advance. can

Since the adhesive 130 can more effectively secure the adhesion between the concrete sleeper and the sleeper pad, and also ensure sufficient flatness on the gravel road, abrasion and crushing of gravel by reducing the transfer stress of the gravel bedrock Reduction is possible, making it possible to maintain and manage gravel tracks more economically.

In addition, according to FIGS. 2C and 2E, the sleeper pad 100 using the rubber pad 110 integrated with the nonwoven fabric 120 may be formed over the entire bottom surface of the concrete sleeper 200, but as shown in FIG. 2D As described above, like the sleeper pad 100 , it is possible to construct the sleeper pad 100 only on the part except for the central part of the concrete sleeper 200 .

In addition, it is preferable that the corner of the sleeper pad 100 is subjected to a rounding treatment (R) so as to more reliably secure the adhesion to the concrete sleeper 200 .

As a result, according to FIG. 2E , the concrete sleeper 200 in which the sleeper pad 100 using the perforated rubber pad of the present invention is attached to the bottom can be installed on the gravel 220 in the gravel track.

In addition, in the portion where the rubber pad 110 and the gravel 220 are in contact with each other, the protruding thickness of the rubber pad 110 is constant, so that flatness can be secured. The concrete sleepers 200 can be effectively constructed for frictional resistance and uniform load transmission by sufficiently securing integrity by being fused to each other.

Furthermore, the fusing agent 130 is for removing or discharging residual air (air) by impregnating or injecting an adhesive and cement paste (P) into the nonwoven fabric 120 in advance, as shown in FIG. 2b , such a fusing agent 130 ) is distinguished even if the same cement paste (P) is used to penetrate to the perforated hole 140b of the nonwoven fabric 120 and the perforated hole 140a of the rubber pad 110 .

Furthermore, the perforation holes 140a and 140b may be divided into a perforation hole 140a of the rubber pad 110 and a perforation hole 140b of the nonwoven fabric 120 as shown in FIGS. 2A and 2C , and cement As described above, the fusing agent 130 including the paste P penetrates into the perforated hole 140b of the nonwoven fabric 120 and also penetrates to the perforated hole 140a of the rubber pad 110 .

[Construction method of sleeper pad 100 using perforated rubber pad]

3A and 3B are views showing a construction flow diagram of a method for constructing the sleeper pad 100 using the perforated rubber pad of the present invention.

As described above, in the construction method of the sleeper pad 100 using a perforated rubber pad, a rubber pad 110 having a constant embedding depth is manufactured to be exposed to the bottom surface of the concrete sleeper 200 by using a pressure plate 210, and then newly installed. And it can be said to be a method of installing on the gravel roadway (A) for maintenance, etc.

First, as shown in FIG. 3A , a sleeper pad 100 using a perforated rubber pad is manufactured.

In this case, the sleeper pad 100 is firstly integrated by mechanical bonding and chemical bonding to make the nonwoven fabric 120 entangled and closely adhered to the rubber pad 110 by heating and pressing, and the concrete ( C) is poured, and the rubber pad 110 and the concrete sleeper 200 are fused to each other using the pressure plate 210, the spacer 260, and the fusing agent 130 to ensure sufficient integrity. like a bar

That is, as discussed with reference to FIGS. 2C and 2D, the rubber pad 110 while the nonwoven fabric 120 is embedded in the concrete surface by using the pressure plate 210 and the adhesive 130 in the concrete poured into the sleeper formwork. ) is exposed on the bottom surface of the concrete sleeper 200, and as the poured concrete C is cured, the sleeper pad 100 is naturally fused and attached to the bottom surface of the concrete sleeper 200.

When attached in this way, it is easy to secure adhesion compared to the method using conventional adhesives, anchors, etc., and since it is an attachment method by concrete curing, it is possible to resist the impact load in the high frequency range on the sleeper 20, so that the gravel ball (A) ), the cycle of maintaining the gravel can be optimized, and the damage of the gravel 220 in contact with the sleeper pad 100 can be minimized, thereby securing economic feasibility.

In addition, as described above, the rubber pad 110 and the nonwoven fabric 120 have perforated holes 140a and 140b respectively, and the perforated holes 140a of the rubber pad 110 may not be formed.

Next, as shown in FIG. 3B , the concrete sleeper 200 attached to the bottom surface of the sleeper pad 100 using a rubber pad integrated with the nonwoven fabric is set on the gravel island (A).

The gravel ballast (A) is a gravel track in which gravel is laid to a certain thickness on a roadbed (including G, auxiliary ballast, etc.) A sleeper 200 made of concrete is set on the upper surface of the gravel island (A).

At this time, the concrete sleeper 200 is arranged to extend in the transverse direction when the traveling direction of the train, etc. is the longitudinal direction, and is usually formed as an intermediate connecting portion 240 connecting between the both end extension flanges 230. there is.

Accordingly, the sleeper pad 100 exposed on the bottom surface of the extension flanges at both ends is in contact with the gravel 220, and the load transmitted by the train is concentrated on the extension flanges 230 at both ends, so that more efficient load transmission and support are possible. it becomes possible

At this time, the rail 250 is installed extending in the longitudinal direction through the fastening device on the both end extension flanges 230 .

Accordingly, the impact load caused by the train running through the rail 250 is transmitted to the gravel 220 through the sleeper pad 100 of the concrete sleeper 200, and the load is placed on the gravel 220 that is intertwined with each other. As this is transferred, it has a dispersion and support effect, and it is possible to reduce the wear and tear of gravel through the reduction of the transfer stress to the gravel ballast (A) in the gravel track.

In addition, the concrete sleeper 200 having the sleeper pad 100 attached to the bottom of the present invention can be applied to the construction and maintenance of a gravel track for railroad (gravel road), in particular, a place where subsidence occurs significantly, branching machine When applied to places where the support stiffness changes, such as , joints, etc., the effect is large.

The above description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

100: sleeper pad using a perforated rubber pad
110: rubber pad 120: non-woven fabric
130: fusion agent 140a, 140b: perforated hole
200: concrete sleeper
210: platen 220: gravel
230: both ends expansion flange 240: intermediate connection
250: rail 260: spacer

Claims (11)

Non-woven fabric 120 embedded in the bottom surface of the concrete sleeper 200;
a rubber pad 110 integrated with the nonwoven fabric 120 and exposed to the bottom surface of the concrete sleeper 200; and
The concrete sleeper 200 contains the cement paste P before curing, and penetrates into the nonwoven fabric 120 in the horizontal and vertical directions via the perforation hole 140b formed in the nonwoven fabric 120 to form a sleeper pad and a sleeper pad. As a sleeper pad 100 comprising; a bonding agent 130 that increases the adhesion of the concrete sleeper 200, the sleeper pad 100 comprising:
The nonwoven fabric 120 is embedded under pressure on the concrete surface poured into the sleeper formwork, and as the poured concrete C is cured, the sleeper pad 100 is attached to the bottom surface of the concrete sleeper 200, and the concrete sleeper 200 is ) and adhesion are ensured;
A perforation hole 140a is additionally formed in the rubber pad 110 so that the adhesive 130 before the concrete sleeper 200 is cured passes through the perforation hole 140b of the nonwoven fabric 120 to the rubber. When the fusion agent 130 is cured as it penetrates to the perforation hole 140a of the pad 110, it resists the horizontal shear stress generated at the interface between the nonwoven fabric 120 and the rubber pad 110, and the rubber pad ( 110) is a perforation, characterized in that the rubber pad 110 of the sleeper pad 100 is uniformly embedded in the surface of the concrete sleeper 200 to a predetermined depth using a pressure plate 210 having a spacer 260. A sleeper pad using a rubber pad. delete According to claim 1,
Residual air inside the nonwoven fabric 120 is a perforated rubber pad, characterized in that it is removed or discharged using a pre-penetrating adhesive 130 containing a cement paste (P) containing a concrete paste and an adhesive. Sleeping pad used. According to claim 1,
In the spacer 260, the rubber pad 110 is in contact with the bottom surface of the pressure plate 210, and when the pressure plate 210 is pressed downward, the spacer 260 is in contact with the surface of the concrete C, and the nonwoven fabric 120 ) is embedded, and the spacer 260 is formed so as to be fixed in a block shape to both ends of the pressure plate 210 so that the rubber pad 110 is embedded only to a certain depth by the spacer 260 . Sleeper pad using perforated rubber pad. delete According to claim 1,
In the process of heating and pressing the rubber pad 110 in close contact with the non-woven fabric 120, the sleeper pad 100 is mechanically bonded in which the non-woven fabric 120 and the rubber pad 110 are entangled in a close contact surface. After being vulcanized, the nonwoven fabric 120 and the rubber pad 110 contact surface are melted and diffused, and the nonwoven fabric 120 and the rubber pad 110 are chemically bonded to the rubber pad 110 and the nonwoven fabric. (120) A sleeper pad using a perforated rubber pad, characterized in that it is integrated. 7. The method of claim 6,
The rubber pad 110 is thinned to form a sheet, integrated with the nonwoven fabric 120 and used as the sleeper pad 100, and the rubber pad 110 is cut to be spaced apart from the end of the concrete sleeper 200, A sleeper pad using a perforated rubber pad, characterized in that it is attached and formed only on the portion where the load is transmitted intensively by the rail. a) the nonwoven fabric 120 embedded in the bottom surface of the concrete sleeper 200; and a rubber pad 110 integrated with the nonwoven fabric 120 and exposed to the bottom surface of the concrete sleeper 200, wherein the cement paste (P) before the concrete sleeper 200 is cured. A sleeper pad using a perforated rubber pad in which 130 penetrates into the nonwoven fabric 120 in the horizontal and vertical directions via the perforated hole 140b of the nonwoven fabric 120 to increase the adhesion between the sleeper pad and the concrete sleeper 200 . manufacturing (100); and
b) disposing the concrete sleeper 200 attached to the bottom surface of the sleeper pad 100 using the perforated rubber pad on the gravel island (A);
a-1) manufacturing EPDM and rubber into EPDM compounded rubber using a compounding machine, but separately providing a nonwoven fabric 120 having a tight material surface wound on a roll;
a-2) forming a sheet (thin plate) of the prepared EPDM compounded rubber through a calendar process to manufacture a rubber pad 110, and adhering it to the nonwoven fabric 120;
a-3) The rubber pad 110 in close contact with the non-woven fabric 120 is heated and pressed through rotor curing, so that the non-woven fabric 120 and the rubber pad 110 are entangled in a close contact with a mechanical bond and vulcanization and allowing the nonwoven fabric 120 and the rubber pad 110 to be chemically bonded to each other while the contact surface of the nonwoven fabric 120 and the rubber pad 110 is melted and diffused;
a-4) injecting or impregnating a fusion agent 130 including an adhesive or cement paste into the nonwoven fabric 120 to remove or discharge the residual air inside the nonwoven fabric 120 ; and
a-5) A method for constructing a sleeper pad using a perforated rubber pad, comprising: a-5) cutting the rubber pad 110 and the nonwoven fabric 120 integrated mechanically and chemically. delete The method of claim 8, wherein step a) comprises:
a-6) embedding in the concrete surface using a pressure plate 210 so that the sleeper pad 100 can be set at an even pressure in the concrete (C) poured into the formwork for the sleeper;
The pressure plate 210 uses a pressure plate 210 using a spacer 260 so that the rubber pad 110 of the sleeper pad 100 is uniformly embedded in the surface of the concrete sleeper 200 to a predetermined depth, but the spacer 260 indicates that the rubber pad 110 is in contact with the bottom surface of the pressure plate 210, and in pressing the pressure plate 210 downward, the spacer 260 is in contact with the surface of the concrete (C) while the nonwoven fabric 120 is pressed. A perforated rubber pad, characterized in that the spacer 260 is formed so as to be embedded in a block shape at both ends of the pressure plate 210 so that the rubber pad 110 is embedded only to a certain depth by the spacer 260 . Sleeping pad construction method using 9. The method of claim 8,
The concrete sleeper 200, in which the sleeper pad 100 of step b) is integrally attached to the bottom surface, has high support rigidity, including locations where new construction, maintenance, and settlement of gravel tracks for railways occur, and branches and joints. placed in a changing location,
A drilling hole 140b is additionally formed in the rubber pad 110 of step a), so that the cement paste P before the concrete sleeper 200 is cured is passed through the drilling hole 140b of the nonwoven fabric 120 . When the cement paste (P) is cured as it penetrates to the perforation hole (140a) of the rubber pad (110), it also resists the horizontal shear stress generated at the interface between the nonwoven fabric (120) and the rubber pad (110). Sleeping pad construction method using a perforated rubber pad.

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