JP4664537B2 - Elastic pad for track and elastic method for track - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention repairs a floating sleeper state caused by a drop in a track that has occurred during long-term use due to a load or an impact caused by the passage of a train, maintains a track state necessary to ensure safe operation of the train, The present invention relates to an elastic pad for a track that gives elasticity and an elastic method for a track using the pad.
[0002]
[Prior art]
In a bedded track with ballast (hereinafter abbreviated as “ballast track”), the track ballast loosens when a train load is applied to the track bed repeatedly through rails and sleepers during long-term use. Maintenance is required.
[0003]
Particularly in the joint portion, since the bending rigidity of the joint plate is small, the deformation of the rail 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 road bed increases.
[0004]
For this reason, plastic deformation of the roadbed ballast is promoted under the joint sleeper, and if the rail shape cannot follow this, floating sleeper is generated, and further the generation of impact load is spurred. As described above, the seam portion is the weakest point of the track in terms of ride comfort, running stability, track maintenance, and the like, and requires a lot of track maintenance.
[0005]
The most common way to maintain this track is to replenish the ballast and tighten it with a work machine such as a multiple tie tamper, and then lay it under the sleeper. In addition, there is a risk of initial settlement immediately after maintenance. Further, since the fine granulation is promoted by damaging the ballast, it is difficult to maintain a stable state for a long time, and maintenance with a relatively short maintenance cycle is required.
[0006]
One way to solve this problem is the “Stonblower”, which blows crushed stone with compressed air into the gap under sleepers, which is used in the UK. In Japan, a work standard was established in 1958 as a method for laying stone crushed stone, but it was no longer used for reasons such as consolidating the roadbed. Moreover, 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 a road bed resistance is ensured. There has been proposed an elasticization method in which a ballast and a small piece of a polymer elastic material are bonded to each other by spraying a roadbed stabilizer made of a synthetic resin on the roadbed portion in which the small piece of the polymer elastic material is embedded.
[0007]
In the elasticization method proposed by this proposal, the roadbed part in which a small piece of polymer elastic material is embedded becomes elastic as a whole, and the structure that can absorb the impact acting on the roadbed through the sleepers is suitable, and the roadbed is stable. It is possible to ensure the required resistance to the road bed with the agent and to maintain the elastic effect of the polymer elastic material stably over a long period of time. it can.
[0008]
[Problems to be solved by the invention]
However, the former "Sutonburoa" to your information, addition of caking conducive of the track bed, it is not easy to breathe beans crushed stone to ensure that gap. The latter elasticized method your information, when the grain refining of the ballast is applied to significantly advanced by chromatic ballast track that gravel of the small pieces granules of polymer elastic material which are mixed in the ballast Will be scattered in the ballast. As a result, the ballast and the polymer elastic material pieces cannot be bonded to each other with the sprayed synthetic resin agent, and the desired performance may not be achieved unless the ballast is significantly replaced.
[0009]
Even when applied to a bedded track with little ballast refinement, it is not easy to mix small pieces of polymer elastic material in a uniform state in the ballast. I need. If repair is carried out in a significantly uneven distribution state, the uniform spring constant will not be obtained, and the support force to the rail will decrease locally, which may cause rail joints to drop in a relatively short period of time. is there.
[0010]
Accordingly, the present invention provides a track elasticizing pad and a track elasticizing method capable of solving these problems, and the main purpose thereof is a floating sleep phenomenon caused by a drop caused by an impact or load acting on the track. It is to easily and inexpensively achieve track maintenance effective for repairing various obstacles such as trajectory ups and downs and lowering of elastic bearing capacity, and reducing maintenance work and improving ride comfort. .
[0011]
[Means for Solving the Problems]
The track elasticizing pad according to the present invention is cured into a bag body, an elastic adjustment material by a small piece of a polymer elastic material previously sealed in a uniform dispersed state in the bag body, and a bag body inserted directly under the sleeper. and a resin injection portion for injecting later sexual elastic resin material under pressure.
[0012]
This elastic pad for the track can be easily inserted directly under the sleeper in a substantially flat state when the elastic resin material before being inserted directly under the sleeper is not injected. It can expand | swell to an up-down direction (thickness direction) by pressurization injection | pouring, and can support a rail elastically through a sleeper.
[0013]
The elastic support force by the elasticized pad can be set to a desired spring constant by adjusting the amount and property of the elastic adjusting material previously enclosed in the bag body, and the amount of elastic resin material to be injected under pressure can be adjusted. By doing so, it is possible to adjust the height of the rail through the sleeper.
[0014]
In addition, since the elastic adjustment material by the small pieces of the polymer elastic material is sealed in the bag body, it does not flow out to the outside, and the small pieces of the polymer elastic material are sealed in a uniformly dispersed state. A uniform spring constant can be maintained over a long period of time.
[0015]
In elasticized pad the track, the resilient adjustment member is that small pieces of the high polymer elastic material is bonded in a dispersed state twine to tree fat material and porous, it takes the form of placed into the bag body it can.
[0016]
In the track for elasticized pads, by a small piece of polymer elastic material constituting the elastic adjustment material porous is adhered twine to tree fat material, high in course during storage or during transport in use Small pieces of molecular elastic material are sealed in the bag body in a uniformly dispersed state, and are made porous by adhesion, so that the elastic resin material to be pressurized and injected later flows through the porous void. The bag body is uniformly filled.
[0017]
In the track elasticizing pad, the polymer elastic material piece may employ a form using a rubber chip obtained by cutting an old tire.
[0018]
In this orbit for elastification pads, by using a rubber chip obtained by cutting old tires as small pieces of elastomer material constituting the elastic adjustment member, by effectively utilizing the industrial wastes is possible preserve the environment An inexpensive elasticized pad can be provided.
[0019]
In the elastic pad for the track, the bag body can take a form in which at least a part of the upper surface side is permeable and an elastic resin material that has been exuded and cured is adhered to the bottom surface of the sleeper in a pressure contact state.
[0020]
Rukoto be held in this orbit for elasticized pads, pressure injected elastic resin material is leached from the upper surface side of the bag body prior to curing, the elasticized pad in position in a state adhered to the bottom side of the sleepers Is possible.
[0021]
In elasticized pad the track, the resin injection portion, said bag body of the rear pair of inlets are formed to protrude from the side Rutotomoni, the said inlet, injection pipe reaching into the bag body The inserted form can be taken.
[0022]
In this orbit for elasticizing pad, the injection pipe is attached to the bag body, not only as an injection port for filling the elastic resin material which is the original function, push-rod when inserting the bag body immediately below the sleepers together can be used as a receptacle for, by such use, it can be so that the shape retaining is smoothly inserted without bent when inserting the bag body directly under the sleepers.
[0023]
In the orbital elasticity pad, the injection pipe may be inserted in a state where the tip side reaches a substantially intermediate position of the bag body.
[0024]
In this orbit for elasticized pads by Rukoto it provided substantially intermediate position between the distal end side bag body of the injection pipe, the through the resin injection portion into the bag body pressure injected elastic resin material, the bag body can you to and quickly filling evenly to.
[0025]
Elasticized method of orbit according to the present invention, the high polymer elastic material piece porous shape formed elastic adjustment member by adhering a uniform dispersion state twine to resin material is previously sealed therein, resin injection the bag body with a part, was inserted between the sleepers and the ballast laid on ballast, the elastic resin material to have a flowability and curability, the bag body through the resin injection portion by injecting the inflated bag body, and the elasticized pads mounted in a compacted state in a space directly under the sleepers.
[0026]
Elasticized method of this track, mounted in perforated track bed track with ballast, the organic ballast track elastic supporting fell in orbit the ballast with fine grains of or gravel of, elasticized pads directly below the sleepers It can be repaired easily and inexpensively, but in particular compared to the elasticization method based on the previous proposal to embed an elastic adjustment material such as rubber chips directly in the ballast described in the prior art There are advantages.
[0027]
First, since the elastic pad contains the elastic adjusting material and the curable elastic resin material in the bag body, even if it is applied to a roadbed track where the ballast has been remarkably refined, it has become a gravel. the elasticized pad is interposed between the phased ballast and sleepers, a state of filling a reduced elastic supporting force can be periods maintained.
[0028]
In addition, the repair work of the track on which the elastic pad is mounted is performed on the gap between the ballast and the sleeper without disturbing the ballast that has been made fine or sandy, so that the stable road bed is maintained as it is.
[0029]
Furthermore, unlike the conventional elasticization method, there is no on-site work to mix small pieces of polymer elastic material in a uniform dispersion state in the ballast, so that a uniform and good repair can be performed without the need for skilled workers. Since it can be performed, the repair cycle can be prolonged and can contribute to the safe operation of the train.
[0030]
In the elastic method of the track, the bag body can take a form in which at least a part of the upper surface side is permeable and the elastic resin material that has been exuded and cured is adhered to the bottom surface of the sleeper in a pressure contact state.
[0031]
In this elasticizing method, the elasticized pad can be fixed at an appropriate position on the bottom surface of the sleeper while being positioned, thereby preventing positional displacement.
[0032]
In elasticized method of the track, the elasticized pads of the two bodies with respect to one of the sleepers, pair the attached one by one body on the left and right, take the form to act separately for left and right rails it can.
[0033]
This track elasticization method allows the spring constant for each of the left and right rails to be arbitrarily set as desired by individually acting a pair of left and right elasticized pads on the left and right rails, desired height adjustment can be performed in, also can facilitate the mounting operation of the elasticized pads for right under the sleepers.
[0034]
In elasticized method of the track, with the insertion gap by inserting the sliding plate to the right under the sleepers, the bag body, the removably inserted push-rod from the resin injection portion into the bag body extrusion operated by may take the form of inserted directly under the sleeper while sliding the upper surface of the sliding plate.
[0035]
Push elasticized method of this track, the gap or directly under the sleepers in floating sleepers state, insertion gap secured by lifting the today trajectories if insufficient in the gap to, inserted into the bag body By pushing out the bar, the bag body can be inserted into an appropriate position immediately below the sleeper while sliding the bag body on the sliding plate, and the elastic pad can be easily and quickly attached.
[0036]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the elastic pad for a track and the elastic method for the same according to the present invention will be described in detail with reference to the accompanying drawings showing a preferred embodiment. FIG. a) shows a longitudinal sectional view in which the longitudinal direction of the rail is cut orthogonally, and (b) shows a longitudinal sectional view in which the longitudinal direction of the sleeper is cut orthogonally.
[0037]
In the bedded track 1, a rail 5 is laid on a sleeper 4 surrounded by a ballast 3 spread on a roadbed 2 except for the upper surface, but the joint 6 of the rail 5 is wider than the other sleepers 4 a. A sleeper 4b is used, and the ballast 3 that holds the rail 5 with a necessary elastic supporting force (spring constant) via the sleeper 4 is in a uniform distribution state as in the bedded track 1A of FIG. It is desirable.
[0038]
However, a large impact is generated by the passage of the train, particularly at the joint portion, and the vibration acceleration of the ballast 3 increases. As a result, the plastic deformation of the ballast 3 is promoted, and if the rail shape cannot be maintained, a floating sleep phenomenon occurs. It will be. For this reason, it is necessary to perform track maintenance with an emphasis on repair work of the deteriorated ballast 3 in the vicinity of the joint portion 6.
[0039]
FIG. 2 shows the state of the bedded track 1B in which the ballast has been refined, wherein (a) shows a longitudinal sectional view in which the longitudinal direction of the rail is cut orthogonally, and (b) shows the longitudinal direction of the sleeper. The longitudinal cross-sectional view which cut | disconnected the direction orthogonally is shown. The ballast 3a located on the side of the sleeper 4 has a relatively predetermined particle size, but the ballast 3b located below the sleeper 4 is distributed in a finely divided state.
[0040]
When performing repair work, as shown in FIG. 3, the ballast 3 on both sides in the longitudinal direction of the sleeper 4 is temporarily removed, and the sleeper 4 and the rail 5 are used with a machine such as a Yamakoshi machine or a jack (not shown). 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 the sleeper 4, and then the upper surface of the sliding plate 8 is slid. The bag body 9 is inserted from the left and right.
[0041]
The sliding plate 8 is formed of a material having at least an upper surface that is slippery, for example, a synthetic resin plate such as a fluororesin plate or a metal plate such as a stainless plate, and has a lateral width substantially equal to the lateral width of the sleeper 4. It is desirable that the length of the main body 9 is longer than that of the bag main body 9 so that the main body 9 can be pulled out, and that the thickness of the main body 9 can be as thin as possible so that the thickness does not change.
[0042]
The bag body 9 is a bag-like shape in which at least a part of the upper surface side is permeable and the lower surface side is impermeable, and is a square having substantially the same external dimensions as the sliding plate 8 and on the left and right sides of the rear end side. , the resin injection portion 10 is formed to project as shown in FIG. 5, the elastic adjustment member 11 by Ri Ru configured into pieces of uniform dispersion state polymeric elastic material is pre-enclosed in the bag main body 9 At the same time, an injection pipe 12 is inserted into the resin injection portion 10 so that the tip side reaches the inside of the bag body 9.
[0043]
The bag body 9 is integrally formed of, for example, a nonwoven fabric or the like, including the resin injecting portion 10, and the entire resin injecting portion 10 and the lower surface side of the bag main body 9 are coated with a synthetic resin material. It is permeable, and the upper surface side is provided with a permeability that allows an elastic resin material to be injected later to exude, and also provided with a flexibility that expands in the vertical direction when the elastic resin material is injected under pressure. it can.
[0044]
The bag body 9 needs to have strength and durability that can withstand long-term use even when subjected to a load or an impact caused by passage of a train. For example, a non-woven fabric made of polyester fiber or polyamide fiber is used for a portion that requires non-permeability. Is coated with a synthetic resin material similar to the fiber, and the permeability coefficient of the permeable portion of the nonwoven fabric varies depending on the use conditions, but is about 1 to 3 × 10 ⁻³ cm / s.
[0045]
The elastic adjusting material 11 can be made of, for example, a polymer elastic material such as rubber or urethane, which is made into small pieces of about 3 to 6 mm. In particular, an old tire that is no longer necessary for a rubber chip is cut and made inexpensively. As shown in FIG. 6, the small pieces of the polymer elastic material are arranged in a uniformly dispersed manner, and the chips are bonded to each other in a point-bonded state with a resin material so as to be bonded. It is desirable to use the same type of resin material as the elastic resin material to be injected later.
[0046]
The injection pipe 12 is fixed 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 bonding and fixing it to the inner side surface of the bag body 9. It is desirable that the tip side of the elastic resin material injected through the bag is inserted so as to reach a substantially intermediate position in the bag body 9 so that the elastic resin material is uniformly injected into the entire region of the bag body 9.
[0047]
When inserting the bag main body 9, a metal or hard synthetic resin push rod 13 is inserted into the injection pipe 12 from the resin injection portion 10 side, and its tip is brought into contact with the inner surface of the front end side of the bag main body 9. When pressed in this state, the bag main body 9 is pushed into the insertion gap 7 generated immediately below the sleeper 4 while sliding on the upper surface of the sliding plate 8.
[0048]
As shown in FIG. 7, the inserted bag body 9 is mounted at a position that acts evenly directly below the left and right rails 5, and after the sliding plate 8 shown in FIG. 5 has been pulled out, the push bar 13 is pulled out. Thereafter, a pipe of a pressure pump (not shown) that pumps 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. 14 is injected.
[0049]
Elastic resin material 14 is injected, while almost uniformly flow toward the front and rear side from the front end side of the injection pipe 12 (the intermediate position of the bag body 9), the gap portion and the periphery of the elastic adjustment member 11 in which the porous The bag body 9 is filled in a state of being attached to the bag. As a result, the bag body 9 expands in the vertical direction , the upper surface is pressed against the bottom surface of the sleeper 4, and the lower surface is pressed against the ballast 3b immediately below the sleeper 4 which has been granulated or sanded. It is mounted in a state where the gap 7 is filled.
[0050]
The elastic resin material 14 can be selected and used from curable resins having elasticity such as polyurethane resin, polyester resin, vinyl ester resin, epoxy resin, etc., but its curing time is shortened so that the repair time can be shortened. Is preferably about 30 minutes to 1 hour, and a certain level of insulation performance is required to ensure electrical insulation between the left and right rails 5 and 5.
[0051]
The injection of the elastic resin material 14 is simultaneously performed from two injection ports on the rear end side of the bag body 9 by using two pressure pumps, so that the injection time can be shortened and the filling can be performed more evenly. Alternatively, it is possible to adopt a work procedure in which only one injection port is injected with one pressure pump in a state where one injection port is closed, and the operating rate of the pump is improved.
[0052]
You can also close the not used inlet, the means you close the inlet injection of an elastic resin material 14 has been completed, or tied off with wire other strap and suitable tie, heated to thermally fused or, may be provided a check valve structure, it can be carried out by appropriately employed various known means.
[0053]
Incidentally, the injection pipe 12 attached to the bag body 9 is inserted in addition to the original function as inlet for filling the elastic resin material 14 in the bag main body 9, the bag body 9 directly under the sleepers 4 Push and functions as a receptacle rod 13, the upper surface so that it can smoothly move the sliding plate 8 without flexing upon insertion directly under the sleepers 4, it combines the features of shape retaining the bag body 9 Yes.
[0054]
When the filling of the elastic resin material 14 is completed , the injection port is closed and the apparatus waits until the elastic resin material 14 is cured. From the upper surface side of the permeable bag body 9, the elastic resin material 14 is immediately after the injection. sequentially exuded part of, this Runode be cured adheres to the bottom portion of the sleepers 4, which elasticized pad 15 where the elastic resin 14 is filled with is fixed in the state that decided position.
[0055]
When the elastic resin 14 has cured, the removal of the machine such as Yamakoshi machine or jacks supported the sleepers 4 and rails 5, returns a ballast 3 that had us removed to the side of the sleepers 4, which repair work Yu ballast track 1C embedding the elasticized pads 15 as shown in FIG. 8 is completed by.
[0056]
In the closed track bed track 1C, the trajectory of the high and low deviation due to the decrease and seams fall of the elastic support force against the rail 5 and the sleepers 4 caused by lifting the sleepers phenomenon effectively by elasticized pads 15 embedded immediately below the sleepers 4 Can be repaired and maintained for a long time.
[0057]
In the above embodiment has been describes the case of using elasticized pads 15 on the repair of floating sleepers phenomenon that occurs rail joint portion 6 of the perforated ballast track 1, the elasticized pads 15 rail joint section 6 can apply also to the sleepers other than, also effective in, for example, repair, such as flapping or tilt phenomenon occurring in the orbit of the before and after take-off.
[0058]
Further, the elasticized pad 15 can be applied to, for example, a sleeper of a bridge track other than the roadbed track 1, and a bridge structure made of H-shaped steel attached to the bridge girder 16 in the bridge track 18 as shown in FIG. to bridge the track 18 the rail 5 is laid over the sleepers 4 on the timber 17, can you to mount the elasticized pads 15 between the sleepers 4 and bridge structural member 17.
[0059]
In the bridge track 18, by wearing the elasticized pad 15 directly below the rail 5, the elastic against such trajectory of flapping or tilting behavior and noise generated due to the deterioration of the sleepers 4, such as simply a rubber pad Compared with the case where a member is mounted, it is effective because the desired elasticity can be imparted in conformity with the deteriorated portion.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 shows an implementation subject to which the present invention is applied, and shows a bedded track 1A in a normal state in a longitudinal sectional view in which the longitudinal direction of the rail is cut orthogonally; ) Is a longitudinal sectional view in which the longitudinal direction of the sleeper is cut orthogonally.
2A shows a bedded track 1B that needs to be repaired due to deterioration. FIG. 2A is a longitudinal sectional view in which the longitudinal direction of the rail is cut orthogonally, and FIG. 2B is an orthogonal view of the longitudinal direction of the sleeper. It is shown in a cut longitudinal section.
FIG. 3 is a longitudinal sectional view of the bedded track 1B in a state in which the ballast 3 on the side of the sleeper 4 which is one step of the repairing operation for the bedded track 1B and interferes with the repairing work is removed.
FIG. 4 is a process of repair work for the bedded track 1B, and the bag body 9 is moved by the push rod 13 through the sliding plate 8 to the insertion gap 7 secured by lifting the sleeper 4 and the rail 5. The longitudinal cross-sectional view of the bedded track 1B in the state to insert is shown.
FIG. 5 is a perspective view of a main part of 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 polymer elastic material encapsulated in a bag body 9 in advance.
FIG. 7 shows a process of repairing the bedded floor track 1B, in which the elastic resin material 14 is injected from the resin injection portion 10 into the bag body 9 inserted immediately below the sleeper 4; A longitudinal sectional view is shown.
FIG. 8 is a longitudinal sectional view of a bedded track 1C in which the repair work is completed and the elastic pad 15 is mounted just below the sleeper 4;
FIG. 9 is a longitudinal sectional view of a bridge track 18 to which the elasticized pad 15 is applied.
[Explanation of symbols]
1, 1A, 1B, 1C Roadbed track 2 Subbase 3 Ballast 4 Sleeper 5 Rail 6 Joint portion 7 Insertion gap 8 Sliding plate 9 Bag body 10 Resin injection portion 11 Elasticity adjusting material 12 Injection pipe 13 Push rod 14 Elastic resin material 15 Elastic pad 16 Bridge girder 17 Bridge structural material 18 Bridge track

Claims (9)

A bag body, is pre-sealed to the bag body, the elastic adjustment member which is formed into a porous shape by adhering a uniform dispersion state entwined small pieces of polymer elastic material to the tree fat material, said bag body orbital for elasticized pads characterized by comprising a resin injection portion for injecting into the bag body a curable elastic resin material under pressure in the inserted state just below the sleepers. The resin injection portion includes a pair of inlet formed projecting on the rear end side of the bag body, is inserted into the inlet, to claim 1 and a injection pipe reaching the bag body The described elastic pad for the track. Said injection pipe, the distal end side of the track for elasticized pads as claimed in claim 2, which is inserted in a state in which almost reaches the intermediate position of the bag body. The track elasticizing pad according to any one of claims 1 to 3, wherein a rubber chip obtained by cutting an old tire is used for the small piece of the polymer elastic material. The track elasticizing pad according to any one of claims 1 to 4, wherein at least a part of the upper surface side of the bag body is permeable and the lower surface side is impermeable. Elastic adjustment member which is formed into a porous shape by adhering a small piece of polymer elastic material with twine to the resin material uniformly dispersed state in advance enclosed therein, the bag body with a resin injection portion, the ballast after insertion between laying the sleepers and ballast, the elastic resin material to have a flowability and curability, to inject into the bag body through the resin injection portion, the inflated bag body , elasticized method of trajectory is characterized in that the elasticized pads mounted in a compacted state in a space directly under the sleepers. The track body elasticizing method according to claim 6 , wherein at least a part of the upper surface side of the bag body is permeable, and an elastic resin material that has been exuded and cured is adhered to the bottom surface of the sleeper in a pressed state. The elasticized pads of the two bodies with respect to one of the sleepers, pair the attached one by one body on the left and right, elasticized method of trajectories according to claim 6 or 7 to act separately for left and right rails . While inserting the sliding plate insertion gap immediately below the sleepers, the bag body, wherein the resin injection portion of the sliding plate by extrusion operations removably inserted push-rod into the bag body The method for elasticizing a track according to any one of claims 6 to 8 , wherein the method is inserted immediately below the sleeper while sliding the upper surface.

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