JPH11222801A - Repair method for embedded plug of concrete sleeper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To regenerate a screw thread by removing a worn screw thread, inserting a capsule with an adhesive into the hole, breaking the capsule, agitating the adhesive, fixing a form bolt in the hole and then, taking out the form bolt after the adhesive has been cured. SOLUTION: When the screw thread of an embedded plug 1 of a concrete sleeper A is repaired, after the embedded plug 1 has been drilled to have a specified hole diameter by a drill 5, the drilled hole is cleaned by a brush blower 3 to remove chips, and then, a capsule 4 with an adhesive is inserted in the drilled hole and thereafter, the capsule 4 is broken by an agitating drill 5 and further, the adhesive is evenly agitated. Then, a form bolt 6 is embedded in the adhesive evenly mixed and at the same time, the form bolt is positioned by a jig 7. Moreover, after curing or the adhesive, the form bolt 6 is taken out to regenerate the screw thread of the embedded plug 1. In this way, the screw thread of the embedded plug 1 can be easily and rapidly regenerated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing bolt holes for mounting rails provided on a concrete sleeper.

[0002]

2. Description of the Related Art Unlike conventional wooden sleepers, concrete sleepers do not require preservative treatment, are durable, can be produced in large quantities, and are protected from the standpoint of protecting wood resources. In recent years, it has been widely used as railroad sleepers. The general fixing of the rail to this concrete sleeper will be described with reference to FIG. To the concrete sleeper A, bolts 23 for fastening the rail B and the concrete sleeper A via the spring clips 22 are used.
A cylindrical synthetic resin plug 1 having a bolt hole 24 formed at the center for screwing the plug 1 is embedded. This plug 1
Since the rail fastening bolts 23 are screwed in, the train load and various stresses act on the bolts 23, and the vibration when the train passes is directly transmitted. The screw thread 25 in the chip 24 may be missing or worn. As a result, the bolt 23 that has been screwed in is loosened or rattled, and the fastening force of the bolt is reduced, and the bolt 23 does not function sufficiently as a rail support. Therefore, it is necessary to repair or replace the plug or replace the concrete sleeper.

[0003] Concrete sleepers are very heavy, and replacing them requires a lot of manpower and heavy equipment, and the work time is not only complicated, such as being limited to nighttime when trains do not pass. Since it is useless to replace the entire sleeper only due to a defective plug, repairing the plug,
Exchanges are usually made. Conventionally, as a method for repairing the plug, there has been a method in which a hardening resin is injected into the plug, a mounting bolt is inserted, and the fastening force of the bolt is restored by hardening. For example,
And Japanese Patent Application Laid-Open No. 4-2723 discloses that after a curable liquid polymer material is injected into an embedding plug, a bolt treated with a release agent is screwed into the outer peripheral surface, and the outer peripheral surface of the bolt is embedded with the bolt. After curing of the polymer material filled in the gap with the inner peripheral surface of the plug,
The bolt is screwed and removed from the plug. Since the curable liquid polymer material disclosed therein must be weighed and mixed at the work site, the work is troublesome, and if the weighing and mixing are insufficient, sufficient There is a problem that a curing reaction and strength after curing cannot be obtained. Further, since the used polymer material starts to cure in a short time, if it is mixed excessively, it hardens and cannot be used, so that there is a problem that waste occurs.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for repairing an embedding plug for a concrete sleeper which has solved the above-mentioned problems. After the abrasion of the plug and the missing screw thread were removed by a hole drill, a capsule containing an adhesive was inserted into the hole, the capsule was crushed by a stirring drill, uniformly stirred, and then a release agent was applied. The mold bolt is embedded and fixed in the hole, and after the adhesive is hardened, the screw of the embedding plug is regenerated by extracting the mold bolt, and the thread embedded in the concrete sleeper is worn. ,
After removing the missing plug with a drill, a capsule containing an adhesive is inserted into the hole, the capsule is crushed with a stirring drill, and the mixture is uniformly stirred. After the adhesive is hardened, a new plug is fixed to the concrete sleeper by removing a bolt.

[0005]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram of a method for repairing an embedding plug according to the present invention. (A) The embedding plug 1 of the concrete sleeper A is drilled with a drill 2 to a predetermined hole diameter (diameter 25 mm, depth 100 m)
m). (B) The inside of the drilled hole is cleaned with a brush blower 3 to remove chips. In the concrete sleeper A, a drain hole 1a is provided at the lower part of the embedding plug 1. However, when water is accumulated due to clogging with pebbles, dust, etc., the brush. It is scattered and removed by the blower 3. (C) After the capsule 4 containing the adhesive is inserted into the hole, the capsule 4 is crushed by the stirring drill 5 and the adhesive is uniformly stirred. (D) The mold bolt 6 is embedded in the uniformly mixed adhesive, and at the same time, the positioning is performed by the jig 7. (E) After curing and curing, the mold bolt 6 is removed, and the abrasion of the plug 1 and the repair of the missing screw thread are completed. In addition, about 30 minutes is suitable as hardening curing time.

[0006] The entire plug 1 is loosened and damaged.
The case of replacing the plug itself will be described with reference to FIG. (A) The embedding plug 1 of the concrete sleeper A is drilled and removed by the rock drill 8 (diameter 36 mm, depth 105 m).
m). (B) The inside of the drilled hole is cleaned with a brush blower 3 to remove chips. In the concrete sleeper A, a drain hole 1a is provided in the lower part of the plug 1; Remove it. (C) Plug the drain hole 1a with a piece of wood 9 or the like,
Confirm the depth, and put the silica sand 10 to adjust the depth. (D) After inserting the capsule 4 containing the adhesive into the hole, the capsule is crushed by the stirring drill 5, and the adhesive is further uniformly stirred. (E) The embedding plug 11 with bolts is embedded in the uniformly mixed adhesive, and at the same time, the positioning is performed by the jig 7. (F) After hardening and curing, the bolt 11a is screwed out and removed.
Finish the work of replacing the plug. In addition, about 30 minutes is suitable as hardening curing time. As the capsule containing the adhesive used in the present invention, the one disclosed in Japanese Patent No. 2601418 is most suitable because of its easy handling.

[0007] Table 1 shows an experiment on the pull-out strength of the plug in the case of repairing only the missing screw thread in the method for repairing the plug of the concrete sleeper according to the present invention described above.

Table 1

[0009] In any of these, a strength of 5.00 tonf or more was recognized as a design pull-out strength. In addition, No. In No. 4, since the sleeper had cracks, water and oil etc. permeated through the gap between the plug and the concrete, the plug was deteriorated, and the pull-out experiment was conducted in a state where the adhesive strength was reduced. Therefore, it is considered that the strength was low. The chemical anchor RM-23A used in this experiment was a two-part mixed type adhesive-containing capsule manufactured by Nippon Decolux Co., Ltd.
It is a 90 mm, 22 cc glass tube.

[0010] Table 2 shows the results of the pull-out strength test of the plug when the plug is entirely replaced.

Table 2

In these, 8.2 to 10.8 tonnes
An extremely good result of f was obtained. In addition,
Chemical anchor RM-361 used in this experiment
OB is a two-part mixed type adhesive-containing capsule manufactured by Nippon Decolux Co., Ltd., which is in a glass tube having an outer shape × length of 33 × 100 mm and a capacity of 70 cc.

The method for repairing an embedding plug of a concrete sleeper according to the present invention having the above-mentioned structure uses a capsule containing an adhesive, so that it is troublesome to measure and mix a liquid polymer material at a work site. There is no mixing and no extra mixing, so there is no waste of resins used. Further, since a capsule filled with a predetermined amount of a curing agent and a main agent is used, the curing reaction of the resin is not uneven, and a stable drawing strength can be obtained.
In addition, the repair work is easy because the rail does not need to be moved and lifted during the repair, and the tools to be used can be limited to drilling drills, impact wrenches and the like. There is no need to arrange heavy equipment, and it can be performed with a small number of people. Also, since only the worn or missing mounting holes are repaired, the entire sleeper does not need to be replaced, reducing the cost of track maintenance and eliminating the need for industrial waste. Can reduce the occurrence of sleepers. Furthermore, since the repair time can be greatly reduced, it can be performed even during the train transit time, and nighttime construction can be reduced, which is useful for improving the working environment, such as burying concrete sleepers. It has many excellent effects as a plug stopper repair method.

[Brief description of the drawings]

FIG. 1 is a work process diagram showing a process of repairing a screw thread of a missing or worn embedding plug.

FIG. 2 is a work process diagram showing a process in a case where the entire embedding plug is replaced.

FIG. 3 is a cross-sectional view showing a state where the rail is attached to a general concrete sleeper;

[Explanation of symbols]

 A Concrete sleeper B Rail 1 Embedding plug 2 Drill 3 Brush / Blower 4 Capsule with adhesive 5 Stirring drill 6 Type bolt 7 Jig 8 Rock drill 9 Wood chip 10 Silica sand 11 Bolt with bolt

[Table 1]

[Table 2]

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[Procedure amendment]

[Submission date] December 17, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for repairing an embedding plug for a concrete sleeper which has solved the above-mentioned problems. After the abrasion of the plug and the missing screw thread were removed by a hole drill, a capsule containing an adhesive was inserted into the hole, the capsule was crushed by a stirring drill, uniformly stirred, and then a release agent was applied. The mold bolt is embedded and fixed in the hole, and after the adhesive is hardened, the screw of the embedding plug is regenerated by extracting the mold bolt, and the thread embedded in the concrete sleeper is worn. ,
After removing the missing buried plug drilling drill, an adhesive containing capsule is inserted into the hole, and disrupted by stirring drill the capsules uniformly stirred, Bolted Umakomisen <br/> Is embedded and fixed in the hole, and after the adhesive is cured, a bolt is removed to fix a new embedding plug to the concrete sleeper.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006] The entire plug 1 is loosened and damaged.
The case of replacing the plug itself will be described with reference to FIG. (A) Drill with embedding plug 1 of concrete sleeper A at the tip
A hole is drilled and removed by a rock drill 8 equipped with 2 (diameter 36 mm, depth 105 mm). (B) The inside of the drilled hole is cleaned with a brush blower 3 to remove chips. In the concrete sleeper A, a drain hole 1a is provided in the lower part of the plug 1; Remove it. (C) Plug the drain hole 1a with a piece of wood 9 or the like,
Confirm the depth, and put the silica sand 10 to adjust the depth. (D) After inserting the capsule 4 containing the adhesive into the hole, the capsule is crushed by the stirring drill 5, and the adhesive is further uniformly stirred. (E) The embedding plug 11 with bolts is embedded in the uniformly mixed adhesive, and at the same time, the positioning is performed by the jig 7. (F) After hardening and curing, the bolt 11a is screwed out and removed.
Finish the work of replacing the plug. In addition, about 30 minutes is suitable as hardening curing time. As the capsule containing the adhesive used in the present invention,
The one disclosed in Japanese Patent No. 2601418 is most suitable because of its easy handling.

[Procedure amendment 4]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2

[Procedure amendment 5]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

Claims (2)

[Claims] After removing a worn or missing thread of an embedding plug embedded in a concrete sleeper by a drill, a capsule containing an adhesive is inserted into the hole, and the capsule is removed by a stirring drill. After crushing and stirring uniformly, a mold bolt coated with a mold release agent is embedded and fixed in the hole, and after the adhesive is cured, the mold bolt is removed to regenerate the thread of the embedding plug. Repair method of embedding plugs for concrete sleepers. 2. A screw thread embedded in a concrete sleeper is worn out, and after removing an embedded plug which has been removed by a hole drill, a capsule containing an adhesive is inserted into the hole, and the capsule is removed by a stirring drill. After crushing and stirring uniformly, a plug with a plug is embedded and fixed in the hole, and after the adhesive has hardened, the bolt is removed and a new plug is fixed to the concrete sleeper. Repair method for embedding plugs of concrete sleepers.