JPH04309603A - Repair method of rail support anchor section - Google Patents

Abstract

PURPOSE:To repair a rail support anchor section which is mounted on a rail support body such as track slab and concrete block without reducing strength of the support body and without damaging reinforcement in the support body. CONSTITUTION:A cylindrical hole 6 whose diameter is larger than that of an imbedded collar 2 which is imbedded in a concrete track slab 1 is drilled in the slab 1, and synthetic resin 5 is poured into an anchor plate 3 section at the lower end of the collar 2 to imbed the anchor plate 3. Next, after a steel imbedded plug 9 is set in the cylindrical hole 6, the synthetic resin 5 is filled between the imbedded plug 9 and the cylindrical hole 6 to fix the steel imbedded plug 9 in the cylindrical hole 6.

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 rail support anchors in track slabs, concrete blocks, etc.

0002

2. Description of the Related Art FIG. 9 shows a typical example of a rail fastening device, in which a rail c installed on a tie plate b on a concrete track slab plate a is fastened by rail fastening bolts d and rail clips e. The rail fastening bolt d is formed in an inverted T shape, and passes through the embedded collar cylinder part e embedded in the track slab plate a, and the T-shaped protrusion f provided at the lower end of the bolt It is configured to be locked to an anchor plate h disposed in a lower part g of the embedded collar having a hole with a diameter larger than that of the collar cylindrical part connected to the lower end of the embedded collar cylindrical part e, The embedded collar and the anchor plate portion constitute a rail support anchor portion.

[0003] If the rail support anchor part is damaged, a method of replacing the entire anchor part is to drill a hole in the concrete rail support body with a larger diameter and depth than the rail support anchor part. It is.

0004

However, the above-mentioned conventional repair methods are not easy to perform, and also cause a reduction in strength due to cross-sectional defects in the slab. Furthermore, there is a risk that reinforcing bars and steel wires buried in the track slab plate may be cut during the drilling operation. The present invention has been proposed in view of the problems of the prior art, and its purpose is to provide a method for repairing a rail support anchor portion that is easy to implement and that can prevent a decrease in the strength of the rail support. At the point.

[0005]

[Means for Solving the Problem] In order to achieve the above-mentioned object, according to the method for repairing a rail bearing anchor part according to the present invention, the above-mentioned embedded part is installed in the concrete rail support body on the upper part of the above-mentioned anchor plate part. A cylindrical hole with a larger diameter than the collar cylindrical portion is bored, a synthetic resin is injected into the anchor plate portion to bury the same portion, and then a steel embedded plug having an internal female screw hole is inserted into the cylindrical hole. After setting, a synthetic resin is filled between the embedded plug and the cylindrical hole to fix the embedded plug in the hole.

[0006]

[Operation] According to the present invention, as described above, the lower end of the bolt is fixed to the lower end of the embedded collar for inserting the rail fastening bolt in the rail support anchor part embedded in the concrete rail support. A cylindrical hole having a larger diameter than the embedding collar cylinder part is bored in the upper part of the anchor plate part for attachment of the part, and a synthetic resin is injected into the anchor plate part to bury the anchor plate part.

[0007] Next, a steel embedded plug having a female threaded hole is set in the cylindrical hole, and a synthetic resin is filled between the embedded plug and the cylindrical hole. The plug is fixed in the concrete rail support, and the rail fastening bolt can be screwed into the female screw hole of the plug to complete the repair of the rail support anchor part.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. 1 is a concrete track slab, 2 is an embedded collar embedded in the same slab 1, 3 is an anchor plate arranged in a large diameter cavity 4 connected to the lower end of the embedded collar 2,
The locking portion at the tip of the rail fastening bolt inserted into the embedded collar 2 is configured to lock.

When repairing the rail support anchor part, as shown in FIGS. 3 and 4, after removing the rail fastening parts such as the fastening bolts, insert a screw into the embedded collar 2 part concentrically with the collar 2. A cylindrical hole 6 with a larger diameter than this is bored. Next, a synthetic resin such as epoxy resin is injected into the anchor plate 3 at the bottom of the cylindrical hole 6 to bury the anchor plate 3 portion. (See FIGS. 5 and 6) Next, a steel embedded plug 9 having a female screw hole into which the rail fastening bolt 7 is screwed and having a protrusion 8 on the outer periphery is set in the cylindrical hole 6, and then Thereafter, a synthetic resin 5 is injected between the embedded plug 9 and the cylindrical hole 6, and the embedded plug 9 is bonded inside the cylindrical hole 6. (See FIGS. 1, 2, 7, and 8) FIG. 1 shows the state in which the rail support anchor part is used after repair, and numeral 10 indicates a tie plate. By eliminating the anchor plate structure and using a steel embedded plug 9 with high screw strength, workability and pull-out strength are increased.

Further, according to the above embodiment, when repairing the rail support anchor part, the large diameter portion 2' of the embedded collar does not need to be drilled, and the embedded collar cylindrical part 2 with a relatively small cross section at the upper part of the track slab 1 is used. Since only the holes are drilled, there is no risk of the reinforcing bars and steel wires being cut, and steel plugs 9 and synthetic resin 5 are embedded in the hole, thereby preventing a decrease in the strength of the track slab 1. Since the injected resin 5 forms a relatively thick layer, insulation is maintained, and by selecting a resin with a small shrinkage rate, separation from the surrounding concrete is prevented.

FIG. 2 shows another embodiment of the present invention, in which a synthetic resin cylindrical body 9' having a protrusion on the outer circumferential surface is integrated with the outer periphery of a steel embedded plug 9. The resin cylindrical body 9' improves insulation and provides anti-corrosion measures.

0012

[Effects of the Invention] According to the method for repairing a rail support anchor part according to the present invention, a cylindrical part having a larger diameter than the embedded collar cylinder part for inserting a rail fastening bolt embedded in the rail support body is provided. A hole was drilled, a synthetic resin was injected into the anchor plate part connected to the lower end of the collar to bury the part, and then an embedded plug having an internal female screw hole was set in the cylindrical hole. After that, a synthetic resin is injected into the gap between the embedded plug and the cylindrical hole to fix the embedded plug in the rail support, and the rail fastening bolt is screwed and tightened to the embedded plug. As a result, only the upper part of the rail support is drilled, improving workability, eliminating the need to cut the reinforcing bars and steel wires within the rail support, preventing a decrease in the strength of the rail support, and preventing anchors from being cut. By using an embedded plug adhesively fixed with synthetic resin instead of the plate, the pull-out resistance is increased, and a rail support anchor part with high structural reliability is constructed.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing the state in which a rail bearing anchor part repaired by the method of the present invention is in use.

FIG. 2 is a longitudinal sectional view showing another embodiment of the rail support anchor portion of FIG. 1;

FIG. 3 is a longitudinal sectional view showing the first step of the repair method of the present invention.

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a longitudinal sectional view showing the second step of the repair method of the present invention.

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is a longitudinal cross-sectional view showing the third step in the method of the present invention.

FIG. 8 is a plan view of FIG. 7;

FIG. 9 is a longitudinal sectional view showing a conventional rail fastening device.

FIG. 10 is a front view of the embedded collar.

FIG. 11 is a plan view of FIG. 10;

[Explanation of symbols]

1 Orbit slab 2 Embedded color 3 Anchor plate 5 Synthetic resin 6 Cylindrical hole 7 Rail fastening bolts 8 Steel embedded plug

Claims (1)

[Claims] 1. A rail comprising an embedded collar for inserting a rail fastening bolt embedded in a concrete rail support, and an anchor plate part for anchoring the lower end fixing part of the bolt, which is connected to the lower end of the collar. In the support anchor part, a cylindrical hole having a diameter larger than the embedded collar cylinder part is bored in the concrete rail support at the upper part of the anchor plate part, and a synthetic resin is injected into the anchor plate part. After filling the same part, an embedded plug made of steel or the like having an internal female screw hole is set in the cylindrical hole, and then a synthetic resin is filled between the embedded plug and the cylindrical hole. A method for repairing a rail support anchor portion, comprising fixing the embedded plug therein.