SK288576B6 - Method of repairing the concrete track sleeper - Google Patents

Abstract

The concrete sleeper (1), in which the sleeper screw (7) is broken, is repaired directly on the track without replacing the concrete sleeper (1) so that the broken sleeper screw (7) is drilled by the core drill bit together with the original regeneration insert (9). Injection mortar (11) - a strong adhesive is applied to the depression (3) after its cleaning, which is created in the sleeper (1), into which the new regeneration insert (9) is pressed. After the injection mortar (11) has been hardened, a new sleeper screw (7) is inserted into the regeneration insert (9).

Description

Technical field

The solution concerns the construction of the railway track, closer fixation of the rail on concrete sleepers and repairs of this fixation.

BACKGROUND OF THE INVENTION

During the maintenance of the track superstructure or when changing the rails, the head of the sleeper bolt is detached and the rail is attached to the sleeper. By detaching it is impossible to fix the rail. The concrete sleeper is thus impaired. This problem is currently solved in the only way - by changing the sleeper for a new one. Screws break off most often in winter, when the number of rail breaks is increased. The replacement of the sleeper is disadvantageous. It is carried out manually or by machine. The replacement of the sleeper is a complex technological procedure, time-consuming and it is also associated with a number of other operations, such as. / substrate compaction. The exchange takes place at train breaks or closures. The manual replacement, which is practiced in the framework of maintenance, is physically strenuous and requires 1 to 3 hours of work per sleeper. The replacement requires the removal of the rail bed in the adjacent inter-sleeper space into which the damaged sleeper extends. This is then pulled out of the track. After digging and ejecting the material under the old sleeper storage area, a new sleeper is inserted, the sleeper screws are fitted and tightened, the bedding material is filled, the sleeper is tamped and the bedding is finished. When replacing the machine, the machine carries out all handling of old and new sleepers, including transport. When changing sleepers, the geometry and stability of the track is also disturbed, which requires subsequent work operations.

The closest prior art is disclosed in JP2935111 of August 16, 1999. It solves the method of repair of embedded concrete sleeper liner. It aims at repairing the screw thread by drilling the entire countersunk insert with the damaged thread. Adhesive-treated molding screw is mixed into the cleaned hole after the insert. The position of the screw is stabilized with the aid After the adhesive has cured, the forming screw is unscrewed. This cleans the new thread in the cured adhesive, in which the screw securing the rail is screwed in. The solution deals with repairing a damaged liner thread, but it does not solve the problem of replacing the torn off fastening bolt whose stem remains in the undamaged thread in the sleeper.

SUMMARY OF THE INVENTION

These drawbacks are eliminated by the method of repairing the concrete sleeper sleeper, which consists in the fact that the broken sleeper bolt is drilled from the sleeper by a core drill together with the original regenerative insert. The grout formed in the sleeper is grouted with an injection mortar - a strength adhesive, into which a new regenerative insert is pressed. After the injection mortar has hardened, a new sleeper screw is screwed into the regeneration insert. The advantage of the solution according to the invention is the possibility to carry out repairs without limiting the train operation, the possibility to carry out repairs regardless of the season. The geometry and the stability of the track are not impaired. The original sleeper is used. The advantage is also great cost reduction and labor saving.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the method of repairing a concrete sleeper with a broken sleeper bolt, the accompanying figures will also serve, where FIG. 1 shows a concrete sleeper in section along the longitudinal center plane. Fig. 2 shows a plan view of the sleeper itself. Fig. 3 shows a portion of a sleeper on which a rail is supported. A rail is mounted on the left side, in the right part of FIG. shows the insertion of a regenerative insert for a new sleeper bolt after injection of the grout.

DETAILED DESCRIPTION OF THE INVENTION

The rail 4 rests on a concrete sleeper 1 on a rubber support 5 laid on a support surface 2. The sleeper 1 is attached to each side by a metal spring 6, which is pressed by the head of the sleeper screw 7 and metal support 12 on a plastic guide 8 and rail. by tearing off the head of the sleeper screw 7, the strength of the connection of the rail 4 to the sleeper 1 is weakened. The broken sleeper bolt 7 must be replaced with a new one. In the case of a repair that takes place without replacement of the sleeper, the sleeper is first torn off

With K 288576 B6, the screw 7 is drilled together with the original regenerative insert 9 in which it was screwed with a core drill at an angle of 5 ° to the axis of the rail 4 away from the rail 4 (according to the concrete sleeper production drawing)

(l) to a depth corresponding to the length of the regenerative insert 9. The opening is cleaned with a brush. The borehole 3 is blown with air and rinsed. A longer metal annular rod 10 is inserted into the recess 3, the diameter of which corresponds to the inner diameter of the regenerative insert 9. The new regenerative insert 9 is slid onto the rod 10 so that it is completely above the concrete sleeper 1. Subsequently, injection mortar is applied to sleeper 1. LL (strength bonded based on epoxy resin) and the regenerative insert 9 is completely pushed into the rod 10 thereon. The edge of the regenerative insert 9 is flush with the bearing surface 2. The excess extruded grout 11 is removed. The rod 10 is withdrawn from the regenerative pad 9 and the injection mortar 11 is allowed to cure for at least two days.

The sleeper bolt 7 is then screwed into the regenerative insert 9 with the metal washer 12 inserted, which firmly presses the metal spring 6 against the rail 4.

The advantage of the invention is the possibility to carry out repairs without limiting the train operation, the possibility to carry out repairs regardless of the season. The geometry and the stability of the track are not impaired. The original sleeper is reused. The advantage is also great cost reduction and labor saving.

S 288576 B6

List of reference marks

- podval

- storage area

3 - recess

- rail

- rubber washer

- spring

- sleeper screw

8 - guide insert

- regenerative pad

- rod

- grout

- metal washer

Claims (1)

PATENT CLAIMS Method for repairing a concrete sleeper with a torn off bolt head for fastening a rail to a sleeper, characterized in that the broken sleeper bolt (7) is removed from the sleeper (1). 5 is drilled with a core drill together with the original regenerative insert (9) and the recess (3) formed in the sleeper (1) is after its cleaning applied grout (11) - strength adhesive, into which a new regenerative insert (9) is pressed. wherein a new sleeper screw (7) is screwed into the regenerative insert (9) after the injection mortar (11) has cured.