JPH0874201A - Improvement of railroad ground - Google Patents

Abstract

PURPOSE: To easily correct disturbance in the case when a railroad changes in ground. CONSTITUTION: A flexible bag body 10 is provided along the longitudinal direction under a sleeper 3 on a roadway ground provided with the sleeper 3 on track bed ballast 2 of the roadway ground. A filler containing ballast 11 is filled in the inside of it, and the track bed ballast 2 is laid between these flexible bag bodies 10 and under them. When sinking of a rail 4 is caused or there is a danger o sinking, an amount of sinking is compensated by supplementally filling the filler in the flexible bag bodies 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved construction method for track ground.

[0002]

2. Description of the Related Art A track ground generally has a structure in which a ballast ballast is laid on the roadbed and rails are provided above the ballast via sleepers.

However, this line structure has the fate of being subjected to repeated loads by the train.

Therefore, in the initial stage, the track sunk in the course of the process in which the gaps between the laid ballast ballasts are made dense and stabilized by train vibration, and then the track ballasts flow laterally due to repeated loads and vibrations. There are also orbital subsidences. Therefore, it is necessary to periodically replenish the ballast and tamper with it, and this track maintenance work requires a great deal of labor.

Many improvements have been made in recent years to the settlement problem of the orbit. That is, the first method is
In the track ground where the settlement has been stable for many years since the opening of the business, the sleepers were replaced with large-scale prestressed concrete sleepers, and asphalt was injected into the upper part of the ballast ballast to block rainwater from the surface of the ballast ballast. For asphalt pavement.

The second method is a so-called filling roadbed structure in which the existing sleepers and ballast ballast are used to fill the lower part of the roadbed with mortar. The third method is a so-called slab track structure.

[0007]

The above-mentioned first to third methods are difficult to combine economical efficiency and workability with effects or reliability, and each has advantages and disadvantages.

[0008] Therefore, an object of the present invention is to make it possible to easily correct the deformation of the track ground when it occurs.

[0009]

[Means for Solving the Problems] The above problem is that, in a track ground in which a sleeper is provided on a ballast of a track ground, a flexible bag is provided at the lower part of the sleeper along the longitudinal direction thereof, and the ballast is provided inside the flexible bag. Filling the filling material containing, and laying ballast ballast between and below this flexible bag body, when the sinking of the rail occurs or there is a risk of sinking, the filling material is replenished in the flexible bag body. It can be solved by filling and compensating for the subsidence.

Further, in the track ground in which sleepers are provided on the ballast of the track ground, a flexible bag is provided in the lower part of the sleepers along the longitudinal direction thereof, and a filling material containing ballast is filled inside the bag. A ballast ballast is laid between and below the flexible bags, and apart from the flexible bags, the flexible bags are further provided at least between the sleepers above or below the flexible bags. When the rail subsidence occurs or there is a risk of subsidence, it is also possible to supplement the filling material in the flexible bag to compensate for the subsidence.

[0011]

In the present invention, when subsidence of the rail occurs or there is a risk of subsidence, the filling material is replenished and filled in the flexible bag to compensate for the subsidence. It is not necessary to replace the entire filled bag, but by filling the bag with the filling material in the bag or at least in the sub-bags provided on the upper and lower sides of the bag, it is possible to prevent the rail from sinking and to compensate for it. You can Therefore, the railway ground can be improved quickly and reliably, which is economical.

[0012]

The present invention will be described in more detail by way of examples with reference to the drawings. (First Embodiment) FIGS. 1 and 2 show a first embodiment, in which a roadbed ballast 2 is laid on a roadbed 1 and sleepers 3 are provided on an upper portion thereof, and rails 4 are laid on it. Has been done. The sleepers 3 of the present invention naturally include concrete sleepers in addition to wood.

In the present invention, the flexible bag 1 is provided under the sleeper 3.
0 (hereinafter, simply referred to as a bag) is provided. As the bag body 10, an appropriate material such as rubber, cloth, or a composite material thereof is used. Further, when the filler is a granular material such as ballast, a net having a mesh smaller than the particle diameter may be used. In this case, the end portion of the bag body can be reinforced so that it uniformly extends in the radial direction and does not extend in the longitudinal direction. The diameter is not limited to be uniform, and the diameter may be slightly smaller in the longitudinal direction.

In any case, the bag body 10 is filled with the ballast 11. As the ballast 11 to be initially filled, it is preferable to use a high quality one in order to improve the cushioning property.

At the time of the construction, the existing ballast at the installation portion of the bag body 10 is removed, the rail 4 is supported by a known support block, and the bag body 10 can be inserted in the direction traversing the line. . After that, the filling port 10a formed at the end portion of the bag body 10 formed in advance can be opened and the new ballast 11 can be filled inside. Although not a very preferable method, the bag body 10 in which the ballast 11 is previously filled can be inserted and installed in the lower portion of the sleeper 3.

Bag body 10 filled with such ballast 11
Supports the entire bag body 10 against the train load,
It is possible to prevent the rail 4 from sinking over a long period of time. Further, the internal ballast 11 exhibits a good cushioning effect against vibrations due to train passage. Further, even if a good quality ballast 11 which is becoming difficult to obtain at present is used, it does not flow out of the bag body 10.

However, when the improved body is used for a long period of time, the surrounding ballast ballast 2 may be deformed or the improved body itself may show a slight change in shape, which may lead to the sinking of the rail or the risk thereof. is there. Therefore, in this case, the subsidence can be compensated by filling the supplementary ballast from the filling port 10a. The ballast for replenishment does not need to be of good quality.

Also, from the beginning or together with supplementary ballast for preventing subsidence, sand or appropriate aggregates can be filled. Further, when it is difficult to fill the refill ballast from the end of the bag body 10, as shown in FIG. 3, the plural filling ports 10A, 10B, 10 are provided at appropriate positions in the longitudinal direction.
C can be formed in advance and filled through them.

(Second Embodiment) On the other hand, in the first embodiment, the sinking is prevented by supplementing the ballast. On the other hand, as shown in FIG. 4, the injection pipe 20 is attached to the bag body 1 in advance or when the sinking prevention is attempted.
It is possible to compensate for the subsidence by inserting the solidified material 21 such as cement milk through the injection pipe 20 and inserting the solidified material 21 therein.

In this case, since it is difficult to spread the solidified material 21 in the entire bag body 10, an injection pipe having a plurality of injection ports in the longitudinal direction can be used. For example,
As shown in FIG. 5, a plurality of injection ports 22a, 2 are provided in the longitudinal direction.
The injection sleeve tube 22 having 2a ... Is inserted into the bag body 10 and the flexible sleeve 23 is provided so as to surround each injection port 22a, 22a. The inner injection pipe 24 having the property packers 24A, 24A is inserted, and the packers 24A, 24A are swelled and closely adhered to the inner wall surface of the injection sleeve pipe 22 by hydraulic pressure from the outside, and are fed into the inner injection pipe 24 under pressure. The solidified material 21 thus obtained is packed into the packers 24A, 24A in the injection inner tube 24.
After being discharged from an injection port (not shown) formed between A, it is possible to inject it into the bag body 10 around the sleeve 23 while expanding the diameter of the sleeve 23 from the injection port 22a. When the injection is completed, the sleeve 23 closes the injection port 22a by its restoring force, so that the injection material does not return to the inside of the injection sleeve tube 22. When injecting from the other injection port 22a, the injection can be performed by moving the injection inner tube 24 in the longitudinal direction.

In the example of FIG. 5, when the injected solidified material 21 is hardened and left for a certain period of time, the solidified material 21 is cracked by the load of the train, so that the solidified material 21 may sink again. At some time, the solidified material 21 can be injected again through the injection pipe 22 that has been left buried in the bag body 10. In this case, since the sleeve 23 prevents the injection ports 22a, 22a ... from being blocked, reinjection is possible.

(Third Embodiment) In each of the above examples, one sleeper 3 is used.
However, it is an example in which one bag body 10 is provided, but it is also possible to improve the bag body 10 by using an adjacent bag body instead of improving the bag body 10 at the time of preventing the sinking over time.

For example, as shown in FIG. 6, ballast 1
1. A flexible bag body 30 is inserted and installed in the lower portion of the bag body 10 filled with 1 in advance or at the time of prevention of sinking, and a refilling ballast, preferably a solidified material 21, is filled in the bag body 30 which is initially flat. be able to. As shown in FIG. 6, retaining walls 31 may be provided at both ends of the bags 10 and 30 to allow bulging only in the height direction.

On the other hand, as shown in FIG. 7, the bag body 30 may be located between the bag body 10 and the sleeper 3, and the bag body 30 may be plural so as to be used in sequence for each number of repairs. . Further, as shown in FIG. 8, a pseudo double bag body 4 in which a bag body 40B is further formed so as to wrap the side portion and the lower portion of the bag body 40A.
It may be 0.

(Others) As the solidifying material, cement milk, cement mortar, asphalt dairy material and the like can be used. As the filler, a non-solidifying material may be used, and in this case, appropriate materials such as sands, slags, aggregates, and plastic beads can be used as mentioned above.

[0026]

As described above, according to the present invention, it is possible to easily correct the deformation of the track ground when it occurs.

[Brief description of drawings]

FIG. 1 is a cross-sectional view in a direction crossing a rail of a track ground in a first embodiment.

FIG. 2 is a vertical cross-sectional view in the rail direction.

FIG. 3 is a front view of a bag body having a plurality of filling ports in the longitudinal direction.

FIG. 4 is a vertical sectional view of an installation example of an injection pipe in a second embodiment.

FIG. 5 is a vertical cross-sectional view of a main part of another installation example of the injection pipe.

FIG. 6 is a transverse sectional view of the third embodiment.

FIG. 7 is a cross-sectional view of another example.

FIG. 8 is a cross-sectional view of an example in which the bag structure is different.

[Explanation of symbols]

1 ... Roadbed, 2 ... Ballast ballast, 3 ... Sleepers, 4 ... Rails,
10.30 ... bag body, 11 ... ballast, 20 ... injection tube, 2
1 ... Solidified material, 22 ... Injection tube.

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 (2)

[Claims] 1. A track ground in which a sleeper is provided on a ballast of a track ground, and a flexible bag body is provided at a lower part of the sleeper along a longitudinal direction thereof.
The inside of the flexible bag is filled with a filling material containing ballast, and a ballast ballast is laid between and below the flexible bag when rail subsidence occurs or there is a risk of subsidence. An improved construction method for the track ground, which is characterized in that the subsidence is compensated by replenishing and filling the ground with filler. 2. A railroad ground in which a sleeper is provided on a ballast of a trackbed ballast, and a flexible bag body is provided at a lower portion of the sleeper along a longitudinal direction thereof.
The inside of the flexible bag is filled with a filler containing ballast, and a ballast ballast is laid between and below the flexible bags, and apart from the flexible bags, at least between the sleepers above the flexible bags or the flexible sleepers. A flexible bag is provided below the flexible bag, and when the rail sinks or there is a risk of sinking, the flexible bag is replenished with a filler to compensate for the sink. An improved construction method for track grounds, which is characterized in that