CZ279811B6 - Roadway-railway line crossing - Google Patents

Abstract

The upper surface of each sleeper (2), the fastening means (3) of the rail (1), the heel (7), the flanks of the webs (8) and the rail heads (9) are provided with a resilient layer (10), preferably microporous rubber with maximum water absorption 20%. The free spaces above the elastic layer (10) and above the gravel (6) placed on the ballast bed (4) between the sleepers (2) are filled between the rails (1) and outside of the rails (1) up to the level of the sleeper ends (2). layers (11, 12, 13), preferably from a plastic concrete mixture up to the leveling heads (9) of the rails (1), with the exception of narrow slots (14) along the inner sides of their heads (9).

Description

(57)

The upper surface of each sleeper (2), the fasteners (3) of the rails (1), the heels (7), the sides of the webs (8) and the rail heads (9) are provided with a flexible layer (10), preferably of microporous rubber with a maximum water absorption of 20%. The voids above the elastic layer (10) and above the ballast (6) deposited on the ballast bed (4) between the sleepers (2) are filled by poured between rails (1) and outside the rails (1) up to the ends of sleepers (2). layers (11, 12, 13), preferably of a mixture of plastics material until the heads (9) of the rails (1) are level, except for narrow slits (14) along the inner sides of their heads (9).

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The invention relates to the crossing of a carriageway with a rail track, in particular rail or urban tramway transport, comprising rails mounted on sleepers mounted on a ballast bed.

Railroad tracks with rail tracks allowing the passage of road vehicles across both rail and urban tramways are usually made of reinforced concrete panels, in some cases combining sleepers with other materials, for example by placing rail sleepers along the rails and between them is a filler made of gravel, asphalt or concrete. In the case of reinforced concrete panels, these are laid on a gravel bed and sanded.

Various types of steel fillings and specially shaped reinforced rubber or plastics are also known which are supported on sleepers and rails.

A common disadvantage of known crosses is their short operational time and the need for frequent repairs or reconstructions. These require detours and closures, causing time loss and increased fuel consumption and thus environmental degradation.

The basic reason for the short service life of the road section is the difference in load from rail and road traffic, which is about 25 t for rail traffic and about 8 t for road traffic.

Crossing disturbances using panels of various types occur mainly due to rains causing leaching of the underlying sand and thus uneven settlement of the panels and uneven support of the panels, which causes deformation and cracking of the panels when the panels are loaded by road traffic. Ingress of water under the panels in winter due to frosts causes uneven lifting of the panels, which crack under load of the abutments, thus damaging the road section of the crossing even from rail traffic.

These disadvantages are eliminated by crossing the roadway with a rail track, in particular rail or urban tramway traffic, comprising rails mounted on sleepers mounted on a ballast bed, according to the invention, which consists in that the upper surface of each sleeper, rail fasteners, heels, flanks and the rail heads are provided with a flexible layer, preferably of microporous rubber with a maximum water absorption of 20%, the free spaces above the flexible layer and over the gravel deposited on the ballast bed between sleepers are filled with poured layers between the rails and outside the rails preferably from a mixture of plastics, to the leveling of the rail heads except for the narrow slits along the inner sides of their heads.

It is preferred that the cast layers are provided with steel or glass fiber reinforcement.

The advantage of crossing the roadway with the rail track according to the invention is that the inserted flexible layer of elastic material ensures separation of the effect of rail and road traffic. In the solution according to the invention, the paving of the intersection of the intersection is avoided, since the poured layer of the concrete mixture is deposited without sand underlay. Other benefits 279811 B6

Also, the resilient layer of resilient material reduces the ingress of water and dirt between the sleepers and the poured layer, which greatly contributes to an increase in the service life of the pavement crossing.

Another advantage of the solution according to the invention is a significant time reduction of traffic and detours when building or renewing a crossing.

An exemplary embodiment of a road-track crossing is shown in the drawing, wherein Fig. 1 is a cross-sectional view of a cross-over with rails in cross-section, and Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1.

At the crossing point of the rail track, the rails 1 are fixed to conventional sleepers 2, arranged at the usual spacing, by means of conventional fastening means _3f formed by the base plates and fasteners. The sleepers 2 are supported on a ballast bed 4, which is spread out and compacted on the railway plane 5. The spaces between the sleepers 2 are filled with gravel 6 to the level of the upper edge of the sleepers 2. The upper surface of each sleeper 2, the sides of the webs 8 and the heads 9 of the rails 1 are provided with an elastic layer 10 of a resilient road traffic of compressible material, for example microporous rubber with a maximum water absorption of 20%. The remaining free spaces above the flexible layer 10 and above the ballast 6 are filled between the rails 1 and outside these rails 1 up to the ends of the sleepers 2 by poured layers 11, 12, 13 from a mixture of plastic concrete or polymer concrete. along the inner sides of the heads

9. rails 1 for wheel flanges (not shown). At the level of the ends of the sleepers 2, the layers 12, 13 are poured over the vertical waterproofing 15, for example asphalt, in contact with the pavement structure 16. The poured layers 11, 12, 13 are poured onto the elastic layer 10 and anchored in gravel 6 simply by flowing between gravel grains and at the same time between the heels 7 and the heads 9 of the rails 1. Poured layers 11, 12, 13 can be provided with reinforcements (not shown), for example of steel or glass or steel fibers, to prevent shrinkage cracks.

Under the load of the roadway crossing with rail vehicles, the ballast bed 4 under the sleepers 2 is resiliently compressed, relieving the elastic layer 10, since the poured layers 12, 13 remain held and supported by gravel 6 between the sleepers.

2. The drop of the rail 1 relative to the cast layers 11, 12, 13, even at the critical point, i.e. at the lower contour of the head 9 of the rail 1, does not disturb the cast layers 11, 12, 13, since After relieving the rails 1 after running over the rail vehicle, the rails 1 and sleepers 2 are reversed, but this is temporarily larger than the previous drop. However, this slight lifting, which in practice is about 1 mm, does not disturb the poured layers 11, 12, 13, since the elastic layer is compressed.

10.

If the road crossing with the track is loaded by road traffic, then there will be proportionally less stress, during which compression of the elastic layer 10 and gravel 6 in which the layers are poured

11, 12, 13 are anchored without disturbing them.

-2GB 279811 B6

The invention can be used in the construction of new railway crossings, repair and reconstruction of existing and at intersections of roads with urban tram transport.

PATENT CLAIMS

Claims (2)

Crossing a railroad track, in particular rail or urban tramway traffic, comprising rails mounted on sleepers, supported on a ballast bed, characterized in that the upper surface of each sleeper (2), fasteners (3) of rails (1) , the heels (7), the sides of the webs (8) and the heads (9) of the rails (1) are provided with a resilient layer (10), the free spaces above the resilient layer (10) and over the ballast (6) supported on the ballast bed (4). ) between the sleepers (2), between the rails (1) and outside these rails (1) up to the level of the sleepers (2) are filled with poured layers (11, 12, 13) into the leveling heads (9) of the rails (1) narrow slits (14) along the inner flanks of their heads (9). Crossing according to claim 1, characterized in that the elastic layer (10) is made of microporous rubber with a water absorption of at most 20% and the poured layers (11, 12, 13) are made of plast concrete.