RU2232221C1 - Reinforced concrete tie - Google Patents

Abstract

FIELD: railway transport; permanent way.

SUBSTANCE: proposed reinforced concrete tie has anchors whose tail parts are embedded in concrete and on ends of tail parts bosses are made. Upper part of anchors consists of wall and two legs for resting on tie surface. Flat concrete pads are arranged between two walls of neighbor anchors for mounting rails. Concrete projections over pads are made between legs of anchor. Each concrete projection occupies part of space between legs of anchor adjoining anchor wall. Upper surface of concrete projection coincides in level with upper surface of anchor legs.

EFFECT: increased resistance to drawing out and loosening of anchor under action of cyclic side load transmitted from rail to anchor.

3 cl, 4 dwg

Description

The invention relates to the construction of railways, in particular the upper structure of the track, and can be used when laying a jointless track.

A reinforced concrete sleeper with rail fastening [1] is known, having anchors embedded in concrete in concrete, with thickenings at the end of the tail parts, and the upper part consisting of a wall and support on the surface of the sleepers, and flat concrete platforms located between two walls of adjacent anchors placing rails on them. These signs coincide with the essential features of the claimed invention. Neighboring anchors are interconnected by tail parts walled into concrete.

The disadvantage of this sleepers is the complexity of the design and manufacturing technology of sleepers.

A reinforced concrete sleeper is known [2], having anchors embedded in concrete in the tail parts, with thickenings at the end of the tail parts, and the upper part consisting of a wall and support on the surface of the sleepers, and flat concrete platforms located between two walls of adjacent anchors for placement on them rails. These signs coincide with the essential features of the claimed invention. Each anchor is made of two parts joined together.

The disadvantage of this sleepers is the lack of resistance to pulling the anchor from the sleepers.

The closest in technical essence to the claimed one is a reinforced concrete sleeper with rail fastening [3], which has anchors embedded in concrete with anchors, which have thickenings at the end of the tail parts, and the upper part consists of a wall and two branches of support on the surface of the sleepers, and located between two walls of adjacent anchors are flat concrete platforms for placing rails on them. These signs coincide with the essential features of the claimed invention. The tail part of the anchor is connected to the upper part by two stiffeners.

The disadvantage of this sleepers is the lack of resistance to pulling and loosening of the anchor in the sleepers under the influence of a cyclic lateral load transmitted from the rail to the anchor. Only a layer of concrete between the thickening of the shank and the surface of the support resists pulling out of the anchor, which is not enough.

The basis of the invention is the task, by performing between the branches of the anchor support of concrete protrusions, to provide an increase in resistance to pulling out and loosening of the anchor in the railroad under the influence of a cyclic lateral load transmitted from the rail to the anchor.

To solve this problem, the reinforced concrete sleepers have anchors embedded in the concrete with tailings, with thickenings at the end of the tailings, and the upper part consists of a wall and two branches of support on the surface of the sleepers, and flat concrete platforms located between two walls of adjacent anchors placing rails on them, concrete ledges towering above the sites are made between the branches of the anchor supports. Each concrete protrusion occupies a part of the volume between the branches of the anchor support adjacent to the wall of the anchor. The upper surface of the concrete protrusion coincides in level with the upper surface of the branches of the anchor support.

The foregoing features of the claimed invention provide a technical result, which consists in increasing the resistance to pulling out and loosening the anchor in the sleeper under the influence of a cyclic lateral load transmitted from the rail to the anchor, due to the involvement of an additional concrete volume located near the anchor wall in the shear resistance.

A causal relationship between the totality of the essential features of the claimed invention and the achieved technical result is as follows.

The execution between the branches of the anchor supports of concrete protrusions towering above the platforms makes it possible to involve an additional volume of concrete located in the resistance to shear and pulling of the anchor, located above the anchor support surface on concrete near the anchor wall, to which lateral force from the rail is transmitted. The anchor wall is less bent due to the transfer of part of the lateral force from the rail to the concrete ledge. In addition, the anchor is further prevented from shifting in the direction of the rail stealing. As a result, the reliability of fixing the anchor in the sleepers is increased.

Occupation by a concrete protrusion of a part of the volume between the branches of the anchor support adjacent to the wall of the anchor support allows avoiding obstruction by this protrusion of the terminal in the recesses of the branches of the anchor support when securing the terminal.

The coincidence in level of the upper surface of the concrete ledge with the upper surface of the branches of the anchor support makes it possible to simplify the design of the mold for pouring concrete into which the anchors will be inserted.

The invention is illustrated by drawings, which depict:

figure 1 - General view of the sleepers of reinforced concrete with immured anchors;

figure 2 is a top view of figure 1;

figure 3 - sleepers with rail fastening;

figure 4 is a top view of figure 3.

Reinforced concrete sleepers have anchors 2 walled up in concrete with tail parts 1, in which 3 thickenings are made at the end of the tail parts, and the upper part consists of wall 4 and two branches 5 of support 6 to the surface 7 of the sleepers. Between the two walls of 4 adjacent anchors there are flat concrete platforms 8 for placing rails 9. Between the branches 5 of the supports 6 of the anchors, concrete projections 10 are made, towering above the platforms 8. Each concrete ledge 10 of the sleepers occupies a part of the volume between the branches 5 of the anchor support adjacent to 4 anchor wall. The upper surface 11 of the concrete ledge 10 of the sleepers coincides in level with the upper surface 12 of the branches 5 of the support 6 of the anchor. The upper parts of the anchors 2 are used to secure the rail 9 mounted on the rubber gasket 13 with the help of inserts 14, which are placed between the sole of the rail and the walls 4 of the anchors, and rod terminals 15.

Concrete protrusions 10 are formed simultaneously with the formation of the entire sleepers and blocking of anchors 2.

The proposed sleepers will have a long service life due to the high reliability of anchoring the anchor in the sleepers.

Sources of information

1. Auth. St. USSR 1401095, class E 01 B 9/00, Bulletin No. 21, 1988.

2. Auth. St. USSR 1474189, class E 01 B 3/34, Bulletin No. 15, 1989.

3. Patent of Russia 2125626, cl. E 01 B 9/30, 01/27/1999 (prototype).

Claims (3)

1. Reinforced concrete sleepers, with anchors walled up in concrete with tailings, which have thickenings at the end of the tailings, and the upper part consists of a wall and two branches of support on the surface of the sleepers, and flat concrete platforms located between two walls of adjacent anchors for placement on them rails, characterized in that between the branches of the supports of the anchors are made concrete ledges, towering above the sites. 2. The sleeper according to claim 1, characterized in that each concrete protrusion occupies a part of the volume between the branches of the anchor support adjacent to the wall of the anchor. 3. The sleeper according to claim 1, characterized in that the upper surface of the concrete protrusion coincides in level with the upper surface of the branches of the anchor support.

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