JPH11209903A - Elasticity construction method for track with track bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elasticity construction method for a track with track bed which can effectively control various obstructions such as a drop, a loose sleeper, mud pumping and an irregularity of a track due to an excessive impact load acting on the track with track bed and can simply inexpensively construct an elastic structure effective for the reduction of maintenance improvement of a riding comfortableness and the reduction of a noise. SOLUTION: In order to make a track with track bed elasticize, small pieces 5 of polymer elastic material are buried into ballasts under a sleeper 2 with excitation, and then in order to secure the resistance force of a track bed, a track bed stabilizer consisting of synthetic resin is scattered on a track bed part having small buried pieces of polymer elastic material to mutually join a ballast 4 and small pieces of polymer elastic material. A tie tamper is specially used tar burying the small pieces. In addition, a rubber chip formed by cutting an old tire is used as a small piece of polymer elastic material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a rail joint,
Various obstacles such as dropping, floating sleepers (tilting and flapping phenomena), track irregularities and muddy phenomena caused by excessive impact loads can be suppressed before and after each abutment, railroad crossing, and branch. The present invention relates to a method of elasticizing a track floor with a flexible elastic structure.

[0002]

2. Description of the Related Art At the joints of rails, noise and vibration are caused when the wheels are transferred due to play or steps, but the impact load at this time repeatedly acts on the sleepers and the roadbed supporting the rails, so that the rail supporting capacity gradually increases. Decreases,
The drop (seam drop) becomes remarkable, and various obstacles such as a floating sleeper phenomenon (a tilting and flapping phenomenon), a mud phenomena due to ballast refinement, and an orbital disorder occur.
This is particularly noticeable in ballast trajectories using PC sleepers having a low shock absorbing capacity.

[0003] Such obstacles may also occur at the back of an abutment (bridge) before and after a bridge, and before and after a crossing and a branch. This is due to the stiffness of the track changing rapidly as the lower support structure changes from concrete to subgrade.

[0004] Therefore, in places where such obstacles may occur, conventionally, a wide sleeper is used in advance, the sleepers are arranged with a narrower interval, or a joint of the rail is made of an iron plate. Although the occurrence of troubles is suppressed by reinforcement, various repair methods have been proposed and implemented in order to further suppress the troubles and extend the maintenance cycle. Specifically, a method of modifying the structure to disperse the load acting on the ballast by interconnecting several sleepers before and after the rail joint and a rubber mat material between the sleeper and the roadbed There is a method of modifying the structure to absorb shock by laying.

[0005]

However, these conventional methods have the disadvantage that the construction cost tends to be large because the construction tends to be large.

The present invention has been devised in order to solve such problems of the prior art, and a main object of the present invention is to provide a descent and a floating caused by an excessive impact load acting on a track floor. Effectively suppresses various obstacles such as sleepers, mud spouts and track deviations, and builds an elastic structure that is effective at reducing maintenance and management, improving riding comfort and reducing noise by simple work at low cost. An object of the present invention is to provide an elasticized construction method for a track floor track that can be performed.

[0007]

In order to achieve the above object, in the present invention, a small piece of a polymer elastic material is vibrated into a ballast below a sleeper in order to make a tracked floor track elastic. In order to secure the ballast resistance, the ballast and the small pieces of the polymer elastic material are mutually dispersed by spraying a ballast stabilizer made of a synthetic resin on the portion of the bed where the small pieces of the polymer elastic material are embedded. It was assumed to be combined.

[0008] According to this, the bedbed portion in which the small pieces of the polymer elastic material are embedded is elasticized as a whole, so that the impact acting on the bedbed through the sleepers can be appropriately absorbed, which is generated on the track with a track. The obstacle can be effectively suppressed. And the ballast stabilizer sprayed on the ballast,
Ballast and polymer elasticity spread along the surface of the ballast and small pieces of polymer elastic material in a three-dimensional network, and are adjacent to each other with moderate flexibility so as not to impair the elasticity of the roadbed by the small pieces of polymer elastic material. The pieces of material are joined together and integrated. For this reason, it is possible to secure a required roadbed resistance force that restrains the movement of the sleeper against the force applied from the rail. In addition, it suppresses the movement of ballast and small pieces of polymer elastic material due to vibration, and also suppresses the lifting of small pieces of polymer elastic material caused by the difference in specific gravity, and at the same time, suppresses the wear of ballast and polymer elastic material, The elastic effect of the material can be maintained for a long time.

In addition, since a small piece of a high-molecular elastic material is embedded while being vibrated in a ballast, a complicated operation of replacing the ballast with a small piece of a high-molecular elastic material is not required. An elastic ballast in which small pieces of a polymer elastic material are dispersed in a ballast can be formed very efficiently. In addition, since the small pieces of the polymer elastic material can be substantially uniformly dispersed in the ballast, the elastic deformation of the roadbed portion in which the polymer elastic material is embedded is made uniform, and the rail support is unstable. Can be avoided.

Further, as mentioned above, the ballast stabilizer sprayed on the ballast spreads and hardens in a three-dimensional network, so that
The ballast can be easily separated by tamping with a multiple tie tamper or the like, and the work is easy when performing repair again. Also, ballasts separated from each other can be reused.

In particular, it is preferable to use a tie tamper for embedding a small piece of the polymer elastic material. According to this, it is only necessary to vibrate the ballast in the same manner as the ballast tamping work that is the original use of the tie tamper, and the embedding work of small pieces of polymer elastic material is extremely easy without using special equipment It can be carried out.

In addition to the above, it is preferable that the small piece of the polymer elastic material is a rubber chip obtained by cutting an old tire. According to this, it is suitable for securing required elasticity and strength, and can be obtained at low cost by recycling waste, thereby reducing costs and contributing to effective utilization of resources. The size of the rubber tip is preferably about 20 to 50 mm, and more preferably, the steel wire included in the old tire is removed for the purpose of securing electrical insulation of the rail joint. As the other polymer elastic material, a material made of a synthetic resin such as a urethane resin or an ethylene-vinyl acetate copolymer resin (EVA resin) may be used. In this case, a material having properties that are not easily attacked by the roadbed stabilizer is used. desirable.

[0013] The above-mentioned roadbed stabilizer has a bonding strength capable of securing a resistance of about 1.5 times as compared with the unsprayed state. Specifically, the bonding strength ( According to JIS-A-6909 "Adhesion strength" test) 7k
It is desirable to be able to secure g / cm ² or more. In addition, it is necessary to reach practical strength within 30 minutes to 4 hours after spraying due to restrictions on construction time, and it is desirable that a similar curing time can be secured even in a severely cold winter season. Further, it is preferable that the viscosity be 500 mPa · S (millipascal second) or less, as a spraying operation using a watering pot or the like is possible even in the extremely cold winter season. In addition, the ballast stabilizer is required to have electrical insulation properties, and it is desirable that the electrical resistance value (surface resistance value) in a hardened state can be secured to 10 ⁹ Ω / inch square or more. Those satisfying the above conditions include a polyurethane resin, a polyester resin, a vinyl ester resin, an epoxy resin, and an emulsion resin.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a rail joint of a track floor track which has been elasticized by the method according to the invention. Here, in the sleeper 2 supporting the joint of the rail 1 and the ballast 4 between the sleepers 6.7 before and after the sleeper 2 and the roadbed 3,
Rubber chips 5 are embedded in a state of being appropriately dispersed,
In the roadbed portion in which the rubber chip 5 is embedded and the roadbed portions leading to the sleepers 8.9 before and after the rubber chip 5, the roadbed stabilizer spreads in a three-dimensional mesh over the range hatched in FIG. The ballast 4 and the rubber chip 5 are combined with each other and integrated with appropriate elasticity.

A track floor with such a structure can be constructed in the following manner. First, as shown in FIG. 2, the ballast 4 between the sleeper 2 and the front and rear sleepers 6, 7 is manually removed so that at least a side surface of the sleeper 2 at the joint portion is substantially exposed, Here, the rubber chip 5 is put. The rubber chip 5 is made of roughly 20 to
It is desirably cut into a length of 50 mm, and as shown in FIG. Note that the steel wire included in the old tire is preferably removed in advance because it damages the insulation of the rail joint.

Next, after adjusting the level of the rail 1 using a jack (not shown), the rubber chip 5 laminated on the ballast 4 using the tie tamper 10 is used to connect the sleeper 2 at the seam portion and the sleeper before and after the sleeper. 6. Into ballast 4 below 7; At this time, it is preferable to insert a large amount of the rubber chip 5 so that the dance of the rubber chip 5 is suppressed and the rubber chip 5 is inserted into the ballast 4 skillfully. This rubber chip 5
The embedding work may be performed in the same manner as the tamping work of the ballast 4, and the rubber chips 5 gradually descend between the ballasts 4 due to the vibration of the tie tamper 10, and the rubber chips 5 are appropriately dispersed in the ballast 4. It can be in the state of having done.

When the operation of embedding the rubber chip 5 is completed,
As shown in FIG. 4, backfill is performed by using the ballast 4 that has been removed earlier, and the roadbed is compacted again by using the tie tamper 10 again. The embedding work of the rubber chip 5 is performed as described above. As described above, the rubber chip 5 is removed by removing the ballast 4 between the sleeper 2 and the sleepers 6, 7 before and after the sleeper 2 in advance. It can be efficiently embedded in the lower ballast of the sleeper 2 and the sleepers 6.7.

Next, before the ballast stabilizer is sprayed on the roadbed portion in which the rubber chips 5 are embedded, the ballast 4 is preferably compacted by using compacting means such as a compactor.
Thereby, the lamination state of the ballast 4 and the rubber chip 5 is made dense to suppress the loosening, the joint state of the ballast by the ballast stabilizer is maintained for a long time, and it is effective in suppressing the ballast subsidence.

The operation of spraying the roadbed stabilizer is performed using a watering can 11 made of synthetic resin as shown in FIG. At this time, the sleeper 2 at the joint and the sleepers 6 before and after the sleeper 2
A suitable amount of a roadbed stabilizer is sprayed on the roadbed portion sandwiched between ９9 and ９9.
As a result, the ballast stabilizer spreads along the surface of the ballast 4 and spreads and hardens in a three-dimensional network, and as shown in FIG. 1, as shown in FIG. The part is intermittently formed with the joint by the track stabilizer.

The roadbed stabilizer used here is a one-part moisture-curable urethane resin which has been prepared in advance to a required viscosity that can be sprayed. Since this track bed stabilizer is a one-part moisture-curing material that cures by reacting with moisture in the air,
The mixing operation is unnecessary, but if an accelerator is added as required, the curing time can be shortened, and the operation can be performed quickly even in winter. In addition, this roadbed stabilizer can be mechanically sprayed with an airless painter.

The rail joint has been described above.
In the method according to the present invention, the floating sleeper phenomenon (aori / battery phenomenon) that occurs before and after abutments, crossings, and branches.
It is also effective for prevention of the mud phenomenon. In this case, in the same manner as described above, the rubber chips 5 are embedded and the roadbed stabilizer is sprayed onto the abutment, the level crossing, and the roadbed ranging from a branch portion to a plurality of (for example, five) sleepers. Work may be performed sequentially.

[0023]

As described above, according to the present invention, the roadbed portion in which the small pieces of the polymer elastic material are embedded is entirely elasticized, so that the impact acting on the roadbed through the sleepers can be appropriately reduced. The structure can be absorbed, and the required bed resistance is secured by the bed stabilizer, and the elastic effect of the polymer elastic material can be stably maintained for a long period of time. For this reason, various obstacles such as a fall in a tracked orbit, a floating sleeper phenomenon (a tilting and flapping phenomenon), an orbital disorder, and a mud phenomena can be effectively suppressed for a long period of time.
Very remarkable effects can be obtained in reducing maintenance, improving ride comfort, and reducing noise. In addition, since the respective operations of embedding the polymer elastic material and spraying the roadbed stabilizer can be easily performed, a great effect can be achieved in realizing quick and low-cost construction.

In particular, when a tie tamper is used for embedding a small piece of a polymer elastic material, it can be performed extremely easily without using special equipment, thereby further speeding up the construction and reducing the cost. Can be. In addition, when a rubber chip obtained by cutting an old tire is used for a small piece of a polymer elastic material, required elasticity and strength can be ensured, and the cost can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a joint portion of a tracked floor track elasticized by a method for elasticizing a tracked floor track according to the present invention.

FIG. 2 is a cross-sectional view similar to FIG. 1, showing a state of partially removing a ballast and inserting a rubber chip.

FIG. 3 is a cross-sectional view similar to FIG. 1, showing a state of embedding a rubber chip by a tie tamper.

FIG. 4 is a cross-sectional view similar to FIG. 1, showing a tamping work state of a roadbed by a tie tamper.

FIG. 5 is a sectional view similar to FIG. 1, showing a state of spraying a track bed stabilizer using a watering can.

[Explanation of symbols]

 Reference Signs List 1 rail 2 sleeper 3 roadbed 4 ballast 5 rubber chip 6-8 sleeper 10 tie tamper 11 watering can

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Masahiro Koyamauchi 2-2-2 Yoyogi, Shibuya-ku, Tokyo East Japan Railway Company (72) Minoru Akiyama 2-2-2 Yoyogi, Shibuya-ku, Tokyo No. Tohoku Nippon Passenger Railway Co., Ltd. (72) Minoru Kimura 2-2-2, Yoyogi, Shibuya-ku, Tokyo Tohoku Nippon Passenger Railway Co., Ltd. (72) Hiroaki Sasa 2-2-2 Yoyogi, Shibuya-ku, Tokyo No. 2 East Japan Railway Company (72) Inventor Hiroto Kurahashi 3-9 Kanda Ogawacho, Chiyoda-ku, Tokyo 3rd A Zeria Building Allen Co., Ltd. (72) Inventor Yoshitaka Murata 4 Shinkiba, Koto-ku, Tokyo Chome 12-12 Shinto Paint Co., Ltd.

Claims (3)

[Claims] 1. A method of making a tracked track elastic by embedding a small piece of a polymer elastic material into a ballast below a sleeper while vibrating, and then securing the ballast resistance by securing the polymer elastic material. A ballast and a polymer elastic material piece are connected to each other by spraying a ballast stabilizer made of a synthetic resin on a portion of the track bed in which the small pieces are embedded. 2. The method according to claim 1, wherein a tie tamper is used to embed the small pieces of the polymer elastic material. 3. The method according to claim 1, wherein the small pieces of the polymer elastic material are rubber chips obtained by cutting old tires.