JP2003013402A - Pad and construction method for elasticizing track - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pad and a construction method for elasticizing a track, which allow effective repair of places of various failures occurring on the track due to a decrease in elastic bearing capacity, which exert an effective influence on a reduction in maintenance work and an improvement in riding comfort, and which easily establish track maintenance at a low cost. SOLUTION: The pad 15 for elasticizing the track, which is used for the construction method for elasticizing the track, is equipped with a bag-shaped pad body wherein at least a part on the side of a top surface has permeability and wherein at least the side of an under surface has impermeability, an elasticity adjusting material which is composed of small pieces of a polymer elastic material presealed in the pad body in a state of uniform dispersion, and a resin injection part wherein a curable elastic resin material is post-injected, in a pressurized state, into the pad body inserted on the side of a bottom of a tie.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a track necessary for repairing a floating sleeper condition caused by a drop in the track during long-term use under load or shock due to passing a train, and ensuring safe train operation. The present invention relates to an elasticizing pad for a track which maintains a state and gives proper elasticity, and an elasticizing method using the same.

[0002]

2. Description of the Related Art A ballasted track with ballast (hereinafter,
In ballast tracks), when the train load is repeatedly applied to the track bed via rails and sleepers during long-term use, the ballast ballast loosens, and periodic maintenance is required to repair the track deviation.

Particularly at the seam portion, since the bending rigidity of the seam plate is small, the rail deformation is large, and the rail shape tends to be angled downward, so that a large impact is generated when the wheel passes and the vibration acceleration transmitted to the roadbed becomes large. .

Therefore, plastic deformation of the ballast of the roadbed is promoted under the seam sleepers, and if the rail shape cannot follow this, floating sleepers are generated, which further accelerates the generation of impact loads. As described above, the seam portion is the weakest point of the track in terms of riding comfort, running stability, track maintenance, etc., and requires a lot of track maintenance.

The most common track maintenance means is to supplement ballast, solidify it with a working machine such as a multiple tie tamper, and lay it under the sleeper. There is a risk of disturbing the ballast and causing an initial settlement immediately after maintenance. Also,
Damage to the ballast promotes grain refinement,
It becomes difficult to maintain a stable state for a long period of time and requires maintenance in a relatively short maintenance cycle.

As a track maintenance means for solving this problem,
There is a "stone blower" that blows crushed pea stones with compressed air into the space under the sleepers that is carried out in the United Kingdom. In Japan as well, a work standard was established in 1948 as a method for laying ground bean crushed stone, but it was no longer used for reasons such as promoting the consolidation of roadbeds. Further, recently, as disclosed in Japanese Patent Application Laid-Open No. 11-209903, a small piece of a polymer elastic material is embedded in a ballast below a sleeper while being vibrated, and then, in order to secure roadbed resistance, An elasticizing method has been proposed in which a ballast and a small piece of the polymeric elastic material are bonded to each other by spraying a ballast stabilizer made of a synthetic resin on the bed portion in which the small piece of the polymeric elastic material is embedded.

In the elasticizing method according to this proposal, the roadbed portion in which the small piece of the polymeric elastic material is embedded is elasticized as a whole,
It has a structure that can properly absorb the impact acting on the roadbed through the sleepers, and also secures the required roadbed resistance force with the roadbed stabilizer, and the elastic effect of the polymer elastic material is maintained stably over a long period of time. It is possible to effectively repair the dip and floating sleepers that occur in the trackbed.

[0008]

[Problems to be Solved by the Invention] However, regarding the former "stone blower", in addition to promoting the consolidation of the roadbed,
It is not easy to surely blow crushed beans into the voids. Regarding the latter elasticizing method, when it is applied to a ballasted orbital track in which the granulation of ballast has remarkably progressed and it has become gravel,
Small pieces of the polymer elastic material mixed in the ballast are scattered in the finely divided ballast. As a result, the ballast and the small pieces of the polymeric elastic material cannot be bonded to each other by the ballast stabilizer made of the dispersed synthetic resin agent, and the desired performance may not be achieved unless the ballast is replaced significantly.

Even when the ballast is applied to a ballasted bed track with almost no grain refinement, it is not easy to mix the small pieces of the polymeric elastic material in the ballast in a uniformly dispersed state, and the skilled person is skilled in the art. Need workers. If repair is carried out in a significantly uneven distribution, a uniform spring constant will not be obtained, and the bearing capacity for the rail will be locally reduced, and the rail joint may drop in a relatively short period of time. is there.

Therefore, the present invention provides an elasticizing pad for a track and a method for elasticizing the same that can solve these problems, and the main purpose of the present invention is to provide a floating paddle due to a drop caused by an impact or load acting on the track. To easily and inexpensively achieve track maintenance effective for repairing phenomena and various obstacles such as track ups and downs and reduction of elastic bearing capacity to reduce maintenance work and improve riding comfort. Is.

[0011]

The elasticized pad for orbit according to the present invention comprises a bag main body, an elastic adjusting member made of small pieces of a polymer elastic material pre-enclosed in the bag main body in a uniformly dispersed state, and a sleeper. A resin injecting section for injecting a curable elastic resin material into the bag body inserted in the bottom side in a pressurized state later is provided.

This elasticized pad for track can be easily inserted to the bottom side of the sleeper in a substantially flat state when the elastic resin material before being inserted into the bottom side of the sleeper is not injected. When the elastic resin material is injected under pressure thereafter, the elastic resin material expands in the vertical direction (thickness direction), and the rail can be elastically supported through the sleepers.

The elastic supporting force of the elasticizing pad can be set to a desired spring constant by selecting the amount and the property of the elastic adjusting material previously sealed in the bag body, and at the same time, the elastic resin material to be injected under pressure can be set. It is also possible to adjust the height of the track through the sleepers by adjusting the amount.

Further, since the elastic adjusting material made of a small piece of the polymeric elastic material is sealed in the bag body, it does not flow out to the outside, and since it is sealed in a uniform dispersed state,
A uniform spring constant can be maintained for a long period of time.

In the elasticized pad for the orbit, the elastic adjusting material has a form in which a small piece of a polymeric elastic material is entwined with a synthetic resin material and adhered in a porous form, and is arranged in a dispersed state in the bag body. You can

This orbital elasticized pad is made uniform by using a small piece of a polymeric elastic material, which is an elastic adjusting material, entwined with a synthetic resin material and adhering it in a porous manner so that it is uniform during use as well as during storage and transportation. It is sealed in the bag body while maintaining the dispersed state, and by being adhered in a porous form, the elastic resin material to be injected under pressure is uniformly filled in the bag body while flowing through the porous voids. It

In the elasticized pad for tracks, a rubber chip obtained by cutting an old tire may be used as the small piece of the polymeric elastic material.

This elasticized pad for tracks uses rubber chips obtained by cutting old tires as small pieces of a polymeric elastic material which is an elastic adjusting material, so that industrial waste can be effectively used and the environment can be protected. It is possible to provide an inexpensive elasticized pad.

In the elasticized pad for track, the bag body may have a form in which at least a part of the upper surface side is permeable, and an elastic resin material that has exuded and hardened is adhered to the sleeper bottom surface in a pressure contact state. it can.

This elasticized pad for track can be extruded from the upper surface side before the elastic resin material injected under pressure is cured, and can be held at a predetermined position in a state of being adhered to the bottom surface side of the sleeper. Is.

In the elasticized pad for orbit, a pair of left and right injection ports are formed in the resin injection portion at the rear end side of the bag body, and an injection pipe reaching from the injection port into the bag body is inserted. It can take the form of being worn.

This orbitalized elastic pad is used not only when the injection pipe attached to the bag body is used not only as an injection port for filling the elastic resin material, which is the original function, but also when the bag body is inserted directly under the sleeper. It can be used as an insertion port for a push-in rod, and can be shaped so that the bag body can be smoothly inserted without being bent when it is inserted directly under the sleeper.

In the orbital elasticized pad, the injection pipe may be inserted and attached with its tip end side reaching almost the middle position of the bag body.

In this elasticized pad for orbit, the tip end side of the injection pipe is provided at a substantially intermediate position of the bag body, so that the elastic resin material pressure-injected into the bag body through the resin injection portion is used. It can be filled evenly and quickly.

In the method of elasticizing the track according to the present invention, the elastic adjusting material made of small pieces of the polymeric elastic material is pre-encapsulated in the bag body in a uniformly dispersed state, and the bag body is laid on the ballast at the bottom side of the sleeper. The elastic resin material is injected into the bag body through the resin injecting part and is fluidized and hardens after a predetermined time, and the expanded bag body is elastically mounted in a space immediately below the sleeper in a compressed state. A pad was provided.

In this track elasticizing method, a decrease in the elastic supporting force of the track caused by the ballast becoming fine-grained or gravel is reduced on the bottom side of the sleeper with respect to the bedbed track using ballast. It can be repaired easily and cheaply by installing the following, but especially compared with the previously proposed elasticizing method in which the elastic adjusting material such as a rubber chip is directly mixed and embedded in the ballast described in the prior art. There are such advantages.

First, since the elasticizing pad accommodates the elastic adjusting material and the curable elastic resin material in the bag main body, when it is applied to the gravel-formed bedbed track due to the extremely fine graining of the ballast. However, the reduced elastic supporting force can be maintained for a long period of time by the elasticized pad interposed between the gravelized ballast and the sleeper.

Further, since the work of repairing the track on which the elasticizing pad is mounted is injected into the gap without disturbing the ballast which has been made fine or gravel, a stable bed is maintained.

Further, unlike the elasticizing method according to the prior art, there is no on-site work for mixing the small pieces of the polymeric elastic material in the ballast in a uniformly dispersed state, so that it is homogeneous and good without requiring a skilled worker. Since it is possible to perform various repairs, it is possible to prolong the repair cycle and contribute to safe train operation.

In the track elasticizing method, at least a part of the upper surface of the bag body is permeable, and an elastic resin material that has exuded and hardened is adhered to the bottom surface of the sleeper in a pressure contact state. it can.

In this elasticizing method, the elasticizing pad is positioned and fixed at an appropriate position on the bottom surface of the sleeper,
Positional deviation can be prevented.

In the method of elasticizing the track, the elasticizing pad may be configured such that two pairs are integrally attached to the left and right rails on the bottom side of the sleeper and individually act on the left and right rails. .

In this track elasticizing method, the spring constants for the left and right rails can be arbitrarily set as desired by causing the pair of left and right elasticizing pads to individually act on the left and right rails. Besides, the height can be adjusted as desired, and the work of mounting the elasticizing pad directly below the sleeper can be facilitated.

In the elasticizing method of the orbit, the bag main body is a push rod inserted in the bag main body so that the sliding plate is inserted into the insertion gap immediately below the sleeper so as to be removably inserted into the bag main body. Thus, it is possible to adopt a mode in which the sliding plate is inserted into the sleeper bottom side while sliding on the upper surface.

This track is made elastic by inserting it into the bag body into the gap directly below the sleeper in the floating sleeper state or, if this gap is insufficient, by inserting the track by raising the rail. By pushing out the pushing rod, the bag body can be slid on the sliding plate to the proper position immediately below the sleeper, and the elasticizing pad can be attached easily and quickly.

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION The elasticized pad for track and the elasticized construction method therefor according to the present invention will be described in detail below with reference to the accompanying drawings showing a preferred embodiment. FIG. (A) is a vertical cross-sectional view obtained by cutting the rail in a longitudinal direction at right angles, and (b) is shown.
The longitudinal cross-sectional view which cut | disconnected the longitudinal direction of the sleeper at right angles is shown.

In the bedded track 1, a rail 5 is laid on a sleeper 4 which is surrounded by a ballast 3 laid on a roadbed 2 except for the upper surface thereof. Sleepers 4b wider than 4a are used,
The ballast 3 that holds the rail 5 with the necessary elastic supporting force (spring constant) through the sleeper 4 is the ballasted track 1A in FIG.
It is desirable to have a uniform distribution state such as.

However, particularly at the seam, a large impact is generated by passing the train, the vibration acceleration of the ballast 3 increases, and the plastic deformation of the ballast 3 is promoted accordingly. It will cause a phenomenon. Therefore, it is necessary to perform track maintenance with an emphasis on repair work of the deteriorated ballast 3 near the seam portion 6.

FIG. 2 shows a state of a ballasted track 1B in which the ballast has been made finer. (A) is a vertical cross-sectional view of the rail cut in the orthogonal direction, and (b) is shown. The longitudinal cross-sectional view which cut | disconnected the longitudinal direction of the sleeper at right angles is shown. It shows that the ballasts 3a located on the sides of the sleepers 4 retain a relatively predetermined grain size, while the ballasts 3b located below the sleepers 4 are distributed in a finely divided state.

When carrying out the repair work, as shown in FIG. 3, the ballasts 3 on both sides of the sleeper 4 in the longitudinal direction are temporarily removed, and the sleeper 4 and the rail 5 are attached to a machine such as a mountain crossing machine or a jack (not shown). ) Slightly lift and sleepers 4
As shown in FIG. 4, the sliding plate 8 is first inserted from the left and right sides into the insertion gap 7 formed immediately below, and then the bag body 9 is inserted from the left and right sides by sliding the upper surface of the sliding plate 8. To do.

The sliding plate 8 is made of a material having a good sliding property at least on the upper surface side thereof, such as a synthetic resin plate made of a fluororesin plate or a metal plate made of a stainless steel plate, and has a width substantially equal to that of the sleeper 4. Also, it is desirable that the length is formed longer than the bag body 9 so that the bag body 9 can be pulled out after the bag body 9 is inserted, and the thickness is as thin as possible within the range that does not deform so as to facilitate the insertion.

The bag body 9 is a sac-like bag in which at least a part of the upper surface side is permeable and the lower surface side is impermeable, and is a rectangular shape having substantially the same outer dimensions as the sliding plate 8 and is formed on the rear end side. As shown in FIG. 5, resin injecting portions 10 are formed on the left and right sides so that the elastic adjusting material 11 made of small pieces of the polymeric elastic material is pre-enclosed in the bag body 9 in a uniformly dispersed state, and Injection part 1
At 0, an injection pipe 12 whose distal end reaches the inside of the bag body 9 is attached.

The bag main body 9 is integrally formed with the resin injecting portion 10 by, for example, a non-woven fabric.
0 and the lower surface side of the bag body 9 are coated with a synthetic resin material so that the lower surface side is impermeable and the upper surface side is permeable to exudate the elastic resin material injected later, When the resin material is injected under pressure, the resin material may have flexibility to expand in the vertical direction.

The bag body 9 is required to have strength and durability capable of withstanding long-term use even when subjected to a load or shock due to passing a train. For example, a nonwoven fabric made of polyester fiber or polyamide fiber is used, and impermeability is required. The portion to be covered is coated with a synthetic resin material similar to the fiber, and the permeability of the permeable portion of the non-woven fabric varies depending on the conditions of use, etc., but a rough guideline is 1 to 3 x 10 ^-3 cm / s. .

The elastic adjusting member 11 may be made of a polymer elastic material such as rubber or urethane in small pieces of about 3 to 6 mm. Particularly, a rubber tire is no longer needed to cut an old tire. It is possible to build at low cost,
As shown in FIG. 6, the small pieces of the polymeric elastic material are arranged in a uniform distribution, and the chips are connected to each other in a point-adhesive state with a resin material to form a porous shape. It is desirable to use the same kind of elastic resin material to be injected.

The injection pipe 12 is fixed to the bag body 9 by inserting a pipe made of vinyl or other synthetic resin material into the bag body 9 from the protruding resin injection portion 10 and adhering to the inner surface of the bag body 9. In order that the elastic resin material injected through the injection pipe 12 is evenly injected into the entire area of the bag body 9, the tip side thereof may be inserted so as to reach a substantially intermediate position in the bag body 9. desirable.

When inserting the bag body 9, the resin injection part 1
When the push rod 13 made of metal or hard synthetic resin is inserted into the injection pipe 12 from the 0 side and the tip is pressed in contact with the inner surface on the tip side of the bag body 9, the bag body 9 slides on the sliding plate 8. While being slid on the upper surface of the above, it is pushed into the insertion gap 7 formed immediately below the sleeper 4.

As shown in FIG. 7, the inserted bag main body 9 is mounted at a position where it acts evenly below the left and right rails 5,
After pulling out the sliding plate 8 shown in FIG.
Pull out. After that, a pipe of a pressure pump (not shown) for pumping the elastic resin material 14 is connected to the injection port of the resin injection portion 10 formed by the injection pipe 12, and the elastic resin material is introduced into the bag body 9 through the injection pipe 12. Inject 14.

The injected elastic resin material 14 flows substantially evenly from the tip side of the injection pipe 12 (the intermediate position of the bag body 9) to the front side and the rear side, while the elastic adjusting material 11 has a porous space. It is filled in the bag body 9 in a state of being attached to the portion and the periphery. As a result, the bag main body 9 is expanded in the vertical direction so that the upper surface side is pressed against the bottom surface side of the sleeper 4, and the lower surface side is pressed against the ballast 3b directly below the sleeper 4 that has been made fine-grained or gravel and inserted. It is mounted in a state of filling the gap 7.

The elastic resin material 14 can be selected and used from curable resins having elasticity such as polyurethane resin, polyester resin, vinyl ester resin and epoxy resin, but it is cured so as to shorten the repair time. It is desirable that the time is about 30 minutes to 1 hour, and a certain level of insulation performance is also necessary to ensure electrical insulation between the left and right rails 5, 5.

The elastic resin material 14 is injected at the same time from the two injection ports on the rear end side of the bag body 9 by using two pressure pumps, thereby shortening the injection time and more uniform filling. Alternatively, it is possible to adopt a work procedure that improves the operating rate of the pump by injecting only one injection port with one pressure pump with one injection port closed. .

In addition, the unused injection port may be blocked,
As a means for closing the injection port after the injection of the elastic resin material 14 is completed, it is tied with a wire or other binding material or an appropriate binding tool, heated and heat-sealed, or provided with a check valve structure. The above various means can be appropriately adopted.

The injection pipe 1 attached to the bag body 9
In addition to its original function as an injection port for filling the elastic resin material 14 into the bag body 9, 2 has a function as an insertion port for a pushing rod 13 for inserting the bag body 9 directly under the sleeper 4, and a pillow. It also has a function of retaining the shape of the bag body 9 so that the upper surface of the sliding plate 8 can be smoothly moved without bending when it is inserted directly below the grip 4.

When the filling of the elastic resin material 14 is completed, the injection port is closed, and the elastic resin material 14 waits until the elastic resin material 14 is cured. A part of the material 14 is sequentially exuded, and when it adheres to the bottom surface of the sleeper 4 and is hardened, it is adhered, so that the elasticizing pad 15 filled with the elastic resin material 14 is positioned. Fixed.

When the elastic resin material 14 is hardened, the machines such as the Yamakoshi machine and the jack which supported the sleeper 4 and the rail 5 are removed, and the removed ballast 3 is put on the side of the sleeper 4. Then, as shown in FIG. 8, the repair work of the bedbed track 1C in which the elasticizing pad 15 is embedded is completed.

In this tracked bed track 1C, a decrease in the elastic support force for the rail 5 and the sleeper 4 due to the floating sleeper phenomenon and a deviation in the track due to the drop of the seam are caused by the sleeper 4
It can be effectively repaired by the elasticizing pad 15 embedded right below, and can be maintained for a long period of time.

In the above embodiment, the elasticized pad 15 is used for repairing the floating sleeper phenomenon that occurs in the rail seam portion 6 of the trackbed 1, but the elasticized pad 15 is used for the rail. It can be applied to sleepers other than the seam portion 6 to repair the roadbed, and is also effective for repairing flapping or flapping phenomenon occurring in the tracks before and after the take-off, for example.

Further, the elasticizing pad 15 can be applied to, for example, sleepers of bridge tracks other than the bedbed track 1, and as shown in FIG. 9, in the bridge track 18, H-shaped steel or the like attached to the bridge girder 16 is used. For the bridge track 18 in which the rail 5 is laid on the bridge structure material 17 via the sleepers 4 by
The elasticizing pad 15 can be mounted between the sleeper 4 and the bridge structure material 17.

The bridge track 18 is provided with the elasticizing pad 15 just below the rail 5, so that a rubber pad or the like can be used against the flapping of the track, the flapping phenomenon, and the noise that occur with the deterioration of the sleeper 4. Compared with the case where the elastic member of (1) is attached, it is possible to apply desired elasticity by adapting to the deteriorated portion, so that it works effectively.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a tracked bed track 1A in a normal state, which is one of the implementation targets to which the present invention is applied, in which a longitudinal direction of a rail is cut orthogonally, and FIG. ) Is a vertical cross-sectional view obtained by cutting the sleepers in the longitudinal direction in an orthogonal manner.

FIG. 2 shows a bedbed track 1B that has deteriorated and requires repair,
(A) is a vertical cross-sectional view obtained by cutting the rail in the longitudinal direction orthogonally, and (b) is shown a vertical cross-sectional view obtained by cutting the longitudinal direction of the sleeper in the orthogonal direction.

FIG. 3 is a vertical cross-sectional view of the ballasted track 1B in a state in which the ballast 3 on the side of the pillow 4 which interferes with the repaired work is removed in one step of the repaired work on the tracked track 1B.

FIG. 4 is a step of a repair work for the tracked track 1B, in which the bag main body 9 is pushed by the push rod 13 through the sliding plate 8 into the insertion gap 7 secured by lifting the pillow 4 and the rail 5. The longitudinal cross-sectional view of the trackbed track 1B in the state inserted.

FIG. 5 is a perspective view of a main part of the repair work centering on the bag body 9.

FIG. 6 is a partial plan view showing a dispersed arrangement state of small pieces (rubber chips) of a polymeric elastic material that are previously enclosed in the bag body 9.

FIG. 7 is a step of a repair work for the ballasted bed track 1B, showing the tracked bed track 1B in a state of injecting the elastic resin material 14 from the resin injection portion 10 into the bag body 9 inserted immediately below the pillow 4. FIG.

FIG. 8 is a vertical cross-sectional view of a tracked track 1C on which the elasticizing pad 15 is mounted just below the pillow 4 after the repair work is completed.

FIG. 9 is a longitudinal sectional view showing a bridge track 18 to which an elasticizing pad 15 is applied.

[Explanation of symbols]

1, 1A, 1B, 1C Ballbed track 2 roadbed 3 ballast 4 sleepers 5 rails 6 seams 7 Insertion gap 8 Sliding plate 9 bags 10 Resin injection part 11 Elasticity adjusting material 12 injection pipes 13 push rod 14 Elastic resin material 15 Elasticized pad 16 bridge girders 17 Bridge structure materials 18 bridge tracks

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Gen Ozawa             3-11-8 Kandanishikicho, Chiyoda-ku, Tokyo             Allen Co., Ltd. (72) Inventor Minoru Ota             3-11-8 Kandanishikicho, Chiyoda-ku, Tokyo             Allen Co., Ltd. (72) Inventor Fumio Yamamoto             6-1073 God, Minamitsukaguchi-cho, Amagasaki-shi, Hyogo             Inside the East Paint Co., Ltd. (72) Inventor Yoshitaka Murata             6-1073 God, Minamitsukaguchi-cho, Amagasaki-shi, Hyogo             Inside the East Paint Co., Ltd. (72) Inventor Katsutoshi Ando             38-8, Hikarimachi, Kokubunji, Tokyo 38 Foundation             Corporate Railway Technical Research Institute (72) Inventor Takahiro Horiike             38-8, Hikarimachi, Kokubunji, Tokyo 38 Foundation             Corporate Railway Technical Research Institute (72) Inventor Hiroshi Nagato             38-8, Hikarimachi, Kokubunji, Tokyo 38 Foundation             Corporate Railway Technical Research Institute (72) Inventor Akira Mukai             38-8, Hikarimachi, Kokubunji, Tokyo 38 Foundation             Corporate Railway Technical Research Institute F-term (reference) 2D056 AD05 AD07                 2D057 BA31 CB00 CC02                 3J048 AA01 BA02 BD05 DA01 EA38

Claims (10)

[Claims] 1. A bag main body, an elastic adjusting member made of a small piece of a polymeric elastic material pre-encapsulated in the bag main body in a uniformly dispersed state, and a curable elastic resin into the bag main body inserted on the bottom side of the sleeper. An elasticized pad for a track, comprising a resin injecting section for injecting a material later under pressure. 2. The elasticized material for orbit according to claim 1, wherein the elastic adjusting material is arranged in a dispersed state in the bag body by entangled a small piece of a polymeric elastic material with a synthetic resin material and adhering it in a porous manner. pad. 3. The elasticized pad for a track according to claim 2, wherein a rubber chip obtained by cutting an old tire is used as the small piece of the polymeric elastic material. 4. The orbit elasticizing pad according to claim 1, wherein at least a part of an upper surface side of the bag body is permeable and a lower surface side thereof is impermeable. 5. A pair of left and right injection ports are formed so as to project from the rear end side of the bag body, and an injection pipe reaching from the injection port into the bag body is inserted into the resin injection section. The elasticized pad of the track described in any one of 1 to 3. 6. The elasticized pad for an orbit according to claim 5, wherein the injection pipe is inserted and attached so that a tip end side thereof reaches a substantially intermediate position of the bag body. 7. An elastic adjusting material composed of small pieces of a polymeric elastic material is preliminarily enclosed in a bag body in a uniformly dispersed state, and the bag body is inserted into the bottom side of the sleeper, and resin is injected into the bag body. It is characterized by injecting an elastic resin material that is fluid and hardened after a predetermined time through the part, and provided an elasticizing pad to be mounted in a compacted state in the void just under the sleeper that laid the expanded bag body on the ballast. The elasticized construction method of the track. 8. The method for elasticizing a track according to claim 7, wherein at least a part of the upper surface side of the bag body is permeable, and an elastic resin material that has exuded and hardened is adhered to the bottom surface of the sleeper in a pressure contact state. . 9. The elasticizing pad for a track according to claim 7, wherein the elasticizing pad is a pair of two bodies mounted on the bottom side of the sleeper and mounted integrally on the right and left rails individually to act on the left and right rails. Law. 10. In the bag body, with the sliding plate inserted in the insertion gap just below the sleeper, the sliding plate is inserted into the bag body through the resin injecting portion so as to be detachable. The method for elasticizing a track according to any one of claims 7 to 9, wherein the track is inserted on the bottom side of the sleeper while sliding the top surface.