JPH0874202A - Track track construction method and repair method - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent track subsidence due to subsidence of the roadbed and loosening of ballast, sideways movement and looseness of ballast due to repeated load and vibration due to passing trains after service, etc. [Structure] A roadbed ballast 8 is laid on the roadbed 13 and sleepers 11 and rails 10 are laid on the roadbed track to build a ballast, gravel, and crushed stone between the sleepers 11 and the roadbed 13. The flexible bag body 1 having airtightness filled with the filling material 12 such as
Further, the filling material 12 is pressure-filled therein, and the roadbed 13 side is preliminarily compacted and settled by the external pressure of the flexible bag 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a railroad track with less subsidence and a method for repairing a railroad track.

[0002]

2. Description of the Related Art Conventionally, track track structures include ballast track tracks, slab tracks, pavement tracks, steel bridge direct tracks, concrete direct tracks, etc. However, the ballast ballast track, which supports the sleepers with ballast ballast, is most often adopted.
The advantages of using ballast on the roadbed are low construction cost, easy wiring change, high internal friction angle due to ballast meshing effect, high strength against load, high followability to deformation, and train load. It has various effects such as distributed to the roadbed or embankment, but at the same time the roadbed is deformed over time due to subsidence of the roadbed or ground, repeated load and vibration of the train, temperature expansion and contraction of the rail itself, etc.
If the rails rise or fall or the road gets out of order, and if it exceeds a certain value, it will hinder the ride comfort and stable running of the train. Therefore, maintenance and inspection of the track is regularly performed,
When there is a subsidence on the track, repair work such as refilling ballast to the roadbed to tamper and repair the track deviation is managed so that the track deviation is always within a certain standard.

In recent years, a slab track without ballast has been proposed from the beginning, which is called a labor-saving track. This slab track is a structure in which the train load is distributed to the subbase by distributing the train load with a slab plate or large-sized sleeper that has a larger pressure receiving area than the sleepers.If the ground is strong or the roadbed is compacted, it will pass through the train. If it has been completed by, there is little orbital deviation after that, which greatly contributes to labor saving in maintenance.

[0004]

As described above, in the case of a ballasted track using ballast for the roadbed, even if the train load can be distributed and transmitted to the roadbed or embankment, the initial stage at the beginning of the line opening However, due to insufficient compaction of the roadbed and the embankment, rapid subsidence occurs until the consolidation of the roadbed and the embankment is completed, and the vibration of the train passage causes the ballast gap to become dense and the ballast particles. Subsidence occurs until the placement of the is finally stabilized. The amount of subsidence caused by these is relatively large, and maintenance at the beginning of the opening of the line is extremely difficult. Even if these subsidences are stable, the deformation due to the looseness of the ballast ballast due to the repeated load and vibration from the train, and the subsidence of the track due to the ballast particles getting into the boundary surface between the roadbed ballast and the roadbed, etc. Since it does not decrease so much and progresses, it is still a big problem, and labor saving of track maintenance work is desired.

In addition, in the case of the above-mentioned ballastless track structure, since there is no ballast, problems caused by the ballast itself such as loosening or sinking of the ballast do not occur. However, especially in the case of newly installed lines, due to reasons such as insufficient compaction of the roadbed and ground, at the initial stage of opening the line,
The consolidation settlement of the roadbed and ground is large. In this case, if the sales line of the trackbed track is modified to a slab track without a trackbed, the consolidation phenomenon of the roadbed will be completed, and it is considered that the track will be a good track with less settlement, but the actual problem is the slab track. Change to is extremely difficult.

Therefore, the main object of the present invention is to prevent the track subsidence at a relatively early stage due to the subsidence of the roadbed or the ground and the looseness of the ballast, and to prevent the repeated load and vibration due to passing the train after the service. (EN) Provided are a method for constructing a labor-saving railroad track and a method for repairing a labor-saving railroad track, which prevents railroad subsidence due to lateral movement and loosening of ballasts and saves maintenance work.

[0007]

Means for Solving the Problems To solve the above problems, the present invention relates to the construction of a ballasted track in which a ballast ballast is laid on a roadbed and sleepers and rails are laid on the ballasted ballast.
Between the sleepers and the roadbed, there is provided an airtight flexible bag body in which a filling material made of crushed / granular material and / or powder material is pumped and filled, It is characterized in that the filling material is further pressure-fed and filled into the bag body or only air is pressure-fed, and the roadbed is preliminarily compacted and settled by the external pressure of the flexible bag body.

Further, when a slab slab is laid on the roadbed and rails are laid on the slab slab to construct a ballastless track, crushed / granular particles and / Alternatively, a flexible bag body having airtightness in which a filling material made of powder is filled by pressure is provided, and the filling material or the air alone is further fed into the flexible bag body. The roadbed is preliminarily compacted and settled by the external pressure of the flexible bag body.

On the other hand, when repairing an existing roadbed track in which a ballast ballast is laid on the roadbed and sleepers and rails are laid on it, the ballast ballast immediately under the sleepers is excavated and directly under the sleepers. A flexible bag having airtightness is arranged on the roadbed along the longitudinal direction, and a filling material made of crushed / granular and / or powdery material is pressure-fed and filled into the inside of the flexible bag. After inflating, the ballast ballast is backfilled around the flexible bag body, and then the flexible bag body is further pumped and filled with the filling material or the air only, and the external pressure of the flexible bag body is increased. Is characterized in that the roadbed is preliminarily consolidated and subsided.

[0010]

[Operation] In the method of constructing a track according to the present invention,
Between the sleepers or slabs and the roadbed, an airtight flexible bag body filled with pressure-filled filling material made of crushed / granular material and / or powder is provided, The flexible bag body is further filled with a filling material by pressure and the like, and the roadbed is preliminarily compacted and settled by the external pressure of the flexible bag body. Soil generally has a characteristic that it hardly deforms when a load within a stress history experienced up to that time acts, and largely deforms when a load exceeding a stress history acts. Therefore, especially in the case of new track, if the roadbed is not sufficiently compacted,
The passage of the train will cause the roadbed to sink significantly.

Therefore, in the present invention, by filling the flexible bag body with the filling material by pressure, an external pressure is applied to the roadbed.
An over-consolidated roadbed is preferably provided by applying an external pressure equal to or higher than the train load. Therefore, even if the train load is applied thereafter, the subsidence amount of the roadbed is significantly reduced. Further, at this time, since the pressure is applied to the roadbed evenly through the flexible bag, the ballast does not directly go into the roadbed due to locally excessive pressure as in the conventional case.

Further, since the flexible bag body tries to shrink after the filling and filling of the filling material is completed, the filling material filled with the feeding material is tightened to be in a dense state, and the flexible bag body is flexible. Since the bag is constrained in its arrangement, it does not loosen or move laterally even when subjected to repeated load or vibration due to train load. Further, due to the restraining effect of the flexible bag, the strength characteristics of the filling material are improved and the roadbed spring value is also improved. Therefore, track subsidence after service is significantly reduced, maintenance is facilitated, and track maintenance work is saved.

Further, in the present invention, when the roadbed is compacted and subsided, by mounting the train car on the rail, the rail can be prevented from rising, and the flexible bag body can reduce the weight of the train. The roadbed side can be pressed as a reaction force. Furthermore, after completion of the consolidation settlement of the roadbed, by forcibly deaerating air from the flexible bag body, due to the contracting force of the flexible bag body, the same effect as compaction,
That is, it is possible to make the inner filling material in a more compact state, and thereafter to reliably suppress loosening and lateral movement of the filling material and prevent the track from sinking.

On the other hand, when track subsidence occurs in the track maintenance work after service, the flexible bag body may be supplementarily filled with a filling material to compensate for the subsidence. By sucking and collecting the filling material from the flexible bag body, a space can be formed directly under the sleepers and the sleepers can be replaced.

By the way, in the present invention, a crushed / granular material and / or a powdery material is used as the filling material. These materials have high followability to deformation, and can be re-pressurized according to the progress of deformation even after being pressure-fed. Moreover, most of the voids are air, and it is possible to instantaneously pack the bag in a solid state simply by discharging the air. On the other hand, when a solidifying material such as cement milk is used, it is hard to re-inject because it solidifies after the injection.
Further, in the case of a viscous material or fluid such as clay or muddy water which does not solidify, it takes a lot of time for dehydration and the degree of fixing of sleepers and slabs becomes small.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings. [Embodiment 1] In Embodiment 1, the case where the existing track is refurbished by the method of the present invention will be described. FIG.
Shows a first flexible bag body according to the present invention, in which the flexible bag body 1 is airtight and has high elasticity such as rubber or a composite material of cloth and rubber. Organic materials are preferably used. In the case of the first embodiment, the shape thereof is preferably cylindrical, and the end portion of the bag body can be strengthened so that it uniformly extends in the radial direction and does not extend in the longitudinal direction. . In this case, the diameter is not limited to be uniform, and the diameter may be partially constricted in the middle. Regarding the stretchability of the bag body 1, the material itself may have no stretchability, but the bellows structure may impart structural stretchability.

The flexible bag 1 has a supply port 2 and an exhaust port 3
And opening / closing valves 4 and 7 are provided in the respective passages. Connected to the supply port 2 is a freely connectable filling material supply pipe 5 extending from a work vehicle for supplying filling material, and crushed / granular bodies such as ballast, bean gravel, sand, plastic beads, and slag powder granules. And / or the filling material 12 of the powder is fed by pressure. Further, the exhaust port 3 is internally provided with a filter 6 so that only the pressure-feeding air is discharged to the outside and the filling material 12 is not discharged to the outside. The pressure in the flexible bag 1 accompanying the pressure feeding is adjusted by the compressed air pressure at the time of pressure feeding, the degree of coarseness and fineness of the filter 6, and the opening degree of the opening / closing valve 7 of the exhaust port 3.

When the existing track is repaired using the flexible bag body 1, the procedure shown in FIGS. 2 (A) to 2 (D) is performed. First, as shown in FIG. 2 (A), the roadbed ballast 8 directly below the sleepers 11 is excavated until the lower roadbed 13 is exposed, and the flexible bag 1 (hereinafter simply referred to as a bag) is placed on the roadbed 13. .) Is placed. Next, the filling material supply pipe 5 is connected to the supply port 2 of the bag body 1 to crush ballast, bean gravel, sand, plastic beads, slag powder, etc.
The filling material 12 such as granules or powder is pressure-fed together with compressed air (hereinafter, referred to as "primary pressure feed" for convenience) and filled in the bag body 1, and the upper portion of the bag body 1 is placed on the lower surface of the sleeper 11. After swelling to the extent of contact, the ballast ballast 8 excavated around the bag body 1 is backfilled to the initial state as shown in FIG. 2 (B). After the repair, since the load transmitted from the sleepers 11 when the train passes is supported by the bag body 1, the backfilled ballast ballast 8 has the bag body 1 inflating sideways. It suffices to have only the function of restraining, and there is no particular need for compaction. Further, since it is not necessary that the ballast has a good quality as long as it can be pressure-fed, a defective ballast generated on site can be used as the filling material 12.

Then, as shown in FIG. 2 (C), the pressure in the bag 1 is preferably equal to or higher than the roadbed reaction force due to the train load, that is, higher than the pressure due to the train load. In order to apply a force to the roadbed as a pre-consolidation load, the filling material 12 is further pressure-fed (hereinafter referred to as “secondary pressure feeding” for convenience), and the roadbed 13 is pressed. A cross-sectional view of this secondary pressure-feeding state is shown in FIG. In this case, at the time of secondary pressure feeding, the reaction point of the bag body 1 becomes the sleeper 11, but the bag body 1
In some cases, the rail 10 may be pushed upward together with the sleepers 11 due to the expansion of No. 1, so it is desirable to stop the work vehicle at the target location.

The above steps are repeated for each sleeper 11, 11 ..., As shown in FIG. 2D, the bag 1 is placed under all the sleepers 11 installed in the target section. Is completed, and the repair work for the route track according to the present invention is completed.
The compressed air sent together with the filling material 12 at the time of the primary pressure feeding and the secondary pressure feeding is discharged to the outside from the exhaust port 3, but when the secondary pressure feeding is completed, a vacuum pump or the like is discharged from the exhaust port 3. By forcibly sucking the air in the bag body 1, the filling material 12 in the bag body 1 can be brought into a solid state.

When the rail 10 sinks in the future, the filling material 12 is replenished in the bag 1 in the same manner as the secondary pressure feeding, and the sinking amount is reduced. Can be compensated. When replacing the sleepers 11 with new wooden sleepers or sleepers made of concrete, the sleepers 1 can be collected by suctioning and collecting the filling material in the bag 1.
A space can be formed immediately below the sleeper 1, and the sleepers can be easily replaced.

By the way, in the first embodiment, the repair work of the existing track has been described, but the present invention can be similarly applied to the track of the new track.

[Second Embodiment] Next, as a second embodiment, a case where the present invention is applied to a slab track installed on a new embankment without a ballast ballast will be described in detail. FIG. 4 is a perspective view of the slab 17 used in the second embodiment, in which side projections 18, 18 projecting downward are formed on both sides of the lower surface. A rectangular parallelepiped bellows bag body 21 is attached and integrally provided on the bottom surface of the inner slab. The bellows bag body 21 has a plane size substantially corresponding to the bottom area of the slab 17 and has a supply port 20 and a discharge port 19.
And are provided so as to extend through the slab 17 to the upper surface side. Further, opening / closing valves 29 and 28 are provided at these ports, respectively.

In order to construct a new track by the slab plate 17, the procedure shown in FIGS. 5 (A) and 5 (B) is performed. First,
After placing the slab 17 on the roadbed 13 and mounting the rails 10, the filling material 12 is first pressure-fed by the filling material supply pipe 5 from the material feeding vehicle to inflate the bellows bag body 21. The primary pressure feeding is performed to such an extent that a large internal pressure is not generated in the bellows bag body 21, and the filling material 12 is filled until the gap between the bottom surface of the slab 17 and the roadbed 13 is reduced as much as possible. After that, as shown in FIG. 5 (B), the work vehicle 24 is placed directly on the target slab plate 17, and the filling material 12 is secondarily fed to inflate the bellows bag body 21 to inflate the slab plate 17 and the work vehicle 24. The roadbed 13 is pressed by using and as reaction members. At the time of this secondary pressure feeding, the slab plate 1 is produced by the internal pressure in the bellows bag body 21.
The roadbed 13 immediately below 7 is deformed into a concave shape by receiving this pressure, but since the filling material 12 is packed in the bellows bag body 21 according to the deformation, the slab 17 does not sink. Further, when it is difficult to control the pressure inside the bellows bag 21, the opening / closing valve 28 of the exhaust port can be closed to apply a predetermined pressure. However, in this case, since the filling material 12 cannot be supplied, the roadbed 13 is deformed by the pressure from the bellows bag body 21 and, after it has settled down, the opening / closing valve 29 of the supply port 20 is closed to close the work vehicle 24. After moving from the slab 17 and opening and closing valves 28 and 29 on both sides, the space 12 is refilled with the filling material 12. These steps are performed for each slab 17 to complete the laying of the slab track continuously supported by the bellows bag body 21.

By the way, when the rail 10 is sunk after the railway is opened, the bellows bag body 21 is refilled with the filling material 12 in the same manner as the above-described secondary pressure feeding, and the subsidence is caused. Can be compensated.

[0026]

As described above in detail, according to the present invention, firstly, it is possible to prevent the subsidence of the roadbed or the ground or the like, and the subsidence of the track at a relatively early stage due to the loosening of the ballast or the like. Secondly, it is possible to prevent track subsidence due to lateral movement and looseness of ballast due to repeated load and vibration due to passing trains after service, and to obtain a labor-saving track that does not require maintenance. be able to.

[Brief description of drawings]

FIG. 1 is a side view of a bag according to the present invention.

FIG. 2 is a procedure diagram for rehabilitating an existing track in Example 1.

FIG. 3 is a cross-sectional view of the roadbed pressing state in the first embodiment.

FIG. 4 is a perspective view of a slab plate according to a second embodiment.

FIG. 5 is a construction procedure diagram of a new slab track in the second embodiment.

[Explanation of symbols]

1 ... Bag, 2/20 ... Supply port, 3/19 ... Exhaust port, 4 ...
28 ・ 29 ... Open / close valve, 5 ... Filling material supply pipe, 6
... filter, 8 ... ballast ballast, 10 ... rail, 11
… Sleepers, 12… Filling materials, 13… Roadbed, 17… Slab version, 21… Bellows bag

Front page continuation (72) Inventor Makoto Sunaga 38-8, Hikarimachi, Kokubunji, Tokyo 38 Railroad Research Institute of Japan (72) Hiroshi Iwasa 4-35 Kudankita 4-chome, Chiyoda-ku, Tokyo Light Industrial Co., Ltd. (72) Inventor Yoshitomo Kinoshita 4-35, Kudankita 4-chome, Chiyoda-ku, Tokyo Inside Light Industrial Co., Ltd.

Claims (8)

[Claims] 1. When constructing a roadbed track in which a ballast ballast is laid on a roadbed and sleepers and rails are laid on the ballast, a crushed / granular material and / or a powdery substance is internally formed between the sleeper and the roadbed. An airtight flexible bag body filled with a filling material made of material is provided, and the filling material or the air alone is further fed into the flexible bag body. A method for constructing a railway track, wherein the roadbed is preliminarily compacted and settled by the external pressure of the flexible bag body. 2. A slab slab is laid on a roadbed and a railbed is laid on the slab slab to construct a ballastless track. Alternatively, a flexible bag body having airtightness in which a filling material made of powder is filled by pressure is provided, and the filling material or the air alone is further fed into the flexible bag body. A method for constructing a railway track, wherein the roadbed is preliminarily compacted and settled by an external pressure of the flexible bag body. 3. A roadbed ballast is laid on the roadbed, and an existing roadbed track with sleepers and rails laid on the roadbed is repaired. A flexible bag body having airtightness is arranged on the roadbed along with, and a filling material made of crushed / granular material and / or powder material is pressure-filled and inflated inside the flexible bag body. After that, the ballast ballast is backfilled around the flexible bag body, and then the filling material or the air alone is further fed into the flexible bag body by the external pressure of the flexible bag body. A method for rehabilitating a railroad track, characterized by precipitating the roadbed to settle. 4. The pressure outside the flexible bag is set to a pressure equal to or higher than a train load received by the roadbed when the roadbed is subsided.
The method of constructing or rehabilitating the track described in 3. 5. A railcar is mounted on the rail to prevent the rail from rising when the roadbed is consolidated.
~ The method of constructing or rehabilitating the track described in 4. 6. The method for constructing or rehabilitating a track according to claim 1, wherein the air is forced out of the flexible bag after the consolidation and settlement of the roadbed is completed. 7. A railroad track constructed or refurbished by the method according to any one of claims 1 to 6, when subsidence occurs,
A method of rehabilitating a railroad track, wherein the flexible bag body is supplementarily filled with a filling material to compensate for the subsidence. 8. A line track constructed or renovated by the method according to any one of claims 1 to 3 to 6, by suctioning and collecting the filling material from the flexible bag body to form a space directly below the sleepers, A method of rehabilitating railroad tracks to replace sleepers.