EP0546380B1 - Railway track structure - Google Patents

Abstract

The railway track structure has rails (6) arranged in pairs and, arranged transversely to the rails and connected thereto, sleepers (5) which bear with their end sections on a foundation plate (2) via elastic intermediate layers (7). Provided between the sleepers (5) are intermediate bodies (13) which are connected to the foundation plate (2). The intermediate bodies (13) which are made of concrete are designed as factory-finished elements. The cross-sectional contour of the intermediate bodies (13) is trapezoidal. The cheeks adjacent to the end sections of the sleepers (5) converge downwardly. The length of the intermediate bodies (13) is the same as or slightly smaller than the length of the sections of the sleeper (5) which project outwards seen from the rails (6). These intermediate bodies (13) are screwed together with the foundation plate. Elastic wedges (22) lie between the adjacent cheeks of the end sections of the sleepers (5) and the intermediate bodies (13). The intermediate bodies (13) are passed through by a vertical continuous bore, which lies in the central region, for receiving a fastening screw (9) which can be anchored in the foundation plate (2). The direct surrounding region of the vertical bore passing through the intermediate body (13) is sunk in relation to the surface of the intermediate body (13). <IMAGE>

Description

The invention relates to a track body with the features of the preamble of claim 1.

A track body of this type is known for example from the Austrian patent 382 178 or from the EU-OS 456 147. The edge-side sections of the sleepers lie in recesses of a substantially U-shaped concrete body, which can be formed, for example, by a bridge structure. Sound-reducing, elastic intermediate layers are provided in the above-mentioned recesses in the concrete body, on which the edge-side sections of the sleepers rest. This construction has proven itself, its disadvantage is that a large amount of formwork is required to manufacture the concrete body.

A superstructure for railroads has become known from German laid-open specification 38 09 466. This superstructure consists of a support plate laid on the ground level or of laid support plates, preferably of a seamlessly made plate made of concrete or bituminous mix, which can be provided with an upper leaching layer made of asphalt concrete. With the carriageway formed by the support plate or support plates, the track grating consisting of rails screwed to sleepers is glued by a casting compound based on bitumen and / or plastic. In order to be able to use such a superstructure not only on the dam, but also on bridges, in tunnels and for switch and rail pull-outs, asphalt mastic or mastic asphalt is filled between the sleepers into the sleeper compartments in one or more work steps to a height of approximately half to the full height of the thresholds. Asphalt mastic or mastic asphalt - it is a very expensive material -saving, it is also provided that beam-like precast concrete parts are inserted in the sleeper compartments, which are as long as the sleepers. The gaps between the sides of the sleepers and the above-mentioned beam-like precast concrete parts are poured out with a casting compound, which also consists of asphalt mastic or mastic asphalt. A track body with this structure can only be used to a limited extent in practice. Since the sleepers are only glued, longitudinal beams connected to the sleepers must be provided outside the rails to stiffen the track body. Asphalt mastic or mastic asphalt is relatively hard and has no elastic properties. At low outside temperatures, asphalt mastic or mastic asphalt becomes very hard and brittle. The thresholds drop by up to 3mm and more under operational loads. As asphalt mastic or mastic asphalt is not elastic, the connecting joint cannot follow this movement, it therefore tears open and forms a gap into which water can penetrate, which freezes at low temperatures, which leads to further damage.

From DE-OS 28 28 713 a sound-absorbing rail mounting has become known, in which the end sections of the sleepers lie in open box-like troughs, the upright boundary surfaces of both the trough and the end sleeper section being inclined and parallel to one another and inclined between them and Rubber buffers are parallel to each other. Although this is an extremely efficient solution with regard to sound insulation, it is not practical because of its enormous effort.

Finally, DE-OS 38 10 700, from which a superstructure for railways is known, should be mentioned here in particular. This superstructure has a foundation plate on which the track grate, consisting of sleepers and rails, is placed and spindled. Then finished concrete parts are placed in the sleeper compartments inserted, which are T-shaped in plan view and whose axis length is greater than the length of the sleepers. These one-end T-shaped prefabricated concrete parts are flush with the end faces of the neighboring sleepers, and with their transverse legs they completely or at least partially cover the neighboring sleeper compartments, depending on their length. There are gaps between the sleepers and the inserted prefabricated concrete parts, which are then poured out with a compound, whereby this compound should also be placed under the sleepers. According to the information in this prior publication, this composite mass can be poured in from above, but can also be introduced in ascending fashion by lances from below. After the compound has been introduced, the spindles that were used for the equipment and for lifting the track grate above the foundation plate are removed. Precast concrete parts of this shape and size have a considerable weight, so that lifting equipment must be used for their laying, it should be borne in mind that these precast concrete parts can only be inserted into the track grille from this side. However, this is only possible if the lifting gear's lifting tackle is moved around at least once when it is being pushed in, since the lifting rope or lifting gear lifting tackle cannot go underneath the rails of the installed track grate. Such great effort for laying a rail track cannot be applied in practice. Apart from that, the grouting of the joints with a compound is also an extremely complex working process, since it must be ensured that all joints are actually filled with this compound.

Starting from this prior art, the invention aims to evolve a track body of the first type mentioned, bypassing the disadvantages and difficulties in the constructions according to the prior art, so that it can be manufactured with less effort than before, without the to impair achievable advantages through its basic structure, what is achieved according to the invention by those measures which are the content and subject of the characterizing part of claim 1.

• Die Figuren 1 bis 3 einen Querschnitt durch eine Trasse, wobei verschiedene Stadien des Aufbaues veranschaulicht sind;
• die Figuren 4, 5 und 6 zeigen den fabriksseitig gefertigten Zwischenkörper in Draufsicht, in Ansicht (Pfeil A in Figur 4) und in Untersicht;
• Figur 7 zeigt den fertiggestellten Gleiskörper in Draufsicht und
• Figur 8 in Ansicht (Pfeil B in Figur 7).

To illustrate the invention, it will be explained in more detail using an exemplary embodiment with reference to the accompanying drawings, without restricting it thereby. Show it:

• Figures 1 to 3 show a cross section through a route, with various stages of construction are illustrated;
• Figures 4, 5 and 6 show the factory-made intermediate body in plan view, in view (arrow A in Figure 4) and in bottom view;
• Figure 7 shows the completed track body in plan view and
• Figure 8 in view (arrow B in Figure 7).

A concrete foundation 2 is poured on site into the grown floor 1 along the planned track route. On this concrete foundation 2, a concrete slab 4 is placed over a mortar bed 3, which runs along the route or the concrete foundation 2 and whose width is smaller than that of the concrete foundation 2. These concrete slabs 4, which follow one another along the route, are manufactured at the factory. The track grate, which consists of the concrete sleepers 5 and the rails 6 attached to them, is now placed and aligned on the foundation thus prepared. Elastic intermediate layers 7 are fastened to the undersides of the sleepers 5, which protrude on both sides relative to the relatively narrow concrete slab 4. These can be glued or temporarily held by means of wires. The track grate is not placed directly on the foundation mentioned, but via the interposition of slats 24, which are a few centimeters high and which are laid along the edges of the concrete slabs 4, so that the undersides of the sleepers 5 relative to the top of these concrete slabs 4 by are slightly distant, as illustrated in FIG. 2. Furthermore, on the end sections the sleepers 5 of the track grid laid in this way placed longitudinal slats 8, in which there are anchor bolts 9 which are screwed into threaded plates 10 at their lower end, the anchor bolts 9 being arranged on the slats 8 such that the threaded plates 10 are on the top of the concrete foundation 2 lie on. Seen in the longitudinal direction of the track grate, that is to say at right angles to the plane of the drawing, these anchor screws 9 are centered in the successive sleeper compartments. Since the side walls of the sleepers 5 are inclined, it is also possible to insert the slats mentioned in such a way that they abut the oblique side walls of the sleepers 5 at the end. This is indicated in FIG. 2 by the dashed line 25. This has the advantage that shorter anchor bolts 9 can be used compared to the first-mentioned arrangement.

After the track grate has been prepared in this way, two formworks 11 are attached to the edge of the concrete foundation, expediently in such a way that their upper edges are flush with the upper edge of the slats 24 or the underside of the sleepers 5. Now the space 12 thus delimited becomes Concrete filled (Figure 3) so that both the elastic intermediate layers 7 and the threaded plates 10 are embedded in concrete. Then the anchor screws 9 are unscrewed and the slats 8 used as auxiliary construction are removed. At this point, however, it should also be noted that the anchor screws 9 can be left in the threaded plates 10. The track grate is then raised a little in sections by means of suitable lifting devices, so that the slats 24 can be pulled out and removed under the sleepers, which have now fulfilled their function as formwork and spacers.

In the interspaces (sleeper compartments) between the end sections of the successive sleepers 5, intermediate bodies 13 are now inserted in the sequence, which have been manufactured in the factory by concrete. Such an intermediate body 13 is in the Figures 4, 5 and 6 shown in different views.

The intermediate body 13 has a trapezoidal cross section (FIG. 5), its side cheeks 14 converging downwards. Its height H corresponds to the height of a threshold 5 or is slightly smaller than this. In its upper side there is a groove 16 open towards one end face 15, and a vertical bore 17 extends from the bottom of this groove 16. On its underside 18 here three support cams 19 are formed, which lie on the corner points of an imaginary triangle. The arrangement is such that the vertical bore 17 for receiving the anchor screw 9 lies within the imaginary triangle, preferably in the middle thereof. The inclination of the lateral cheeks 14 of the intermediate body 13 is selected such that these cheeks 14 limit an upwardly converging gap 20 with the lateral sections of the threshold 5, which is indicated in FIG. 5 by a dashed line 21. This dashed line 21 indicates the side cheek of an adjacent threshold 5.

The twin bodies 13 thus manufactured at the factory are now inserted into the track grate (FIGS. 7 and 8). However, before these intermediate bodies 13 are inserted into the edge sections of the sleeper compartments, wedges 22 are placed on the side cheeks of the sleepers 5. These wedges are made of an elastic material, such as polyurethane. Only then is the intermediate body 13 inserted and clamped by means of the anchor screw 9, the lower end of which is screwed into the threaded plate 10, which in turn is firmly anchored in the concrete.

Thanks to the measure according to the invention, elaborate formwork measures can be saved when erecting the track body described, nevertheless the track body is firmly and securely anchored on the foundation 2 and this by means of double-action, sound-reducing elastic supports. Thanks to the described inclination of the cheeks 14 of the intermediate body 13 in relation to the lateral cheeks of the sleepers 5, the inserted wedges 22 are secured with regard to their position and cannot deflect upwards. Through the groove 16 in the intermediate body 13, the head of the anchor screw 9 is set back relative to the surface 23. Rainwater can flow off through the laterally open channel. Due to the support cams 19 and their arrangement and the position of the anchor screw 9 with respect to these support cams, a perfect support of this intermediate body 13 is ensured even with an uneven concrete foundation 2. Since the axial length 1 of the intermediate body 13 is equal to or less than the length of the end portions of the sleepers 5 projecting outwards as seen from the rails 6, these can be inserted into the track grating by means of a vertical lifting movement without them being laterally during assembly have to be moved in order to thread them into the threshold compartment from the side, so to speak. By screwing by means of the anchor screws 9, the intermediate bodies 13 are firmly anchored to the foundation 2 and thus form an immovable abutment for the track grate.

In the exemplary embodiment of the invention described and shown above, the track grate rests on the concrete foundation 2 manufactured on site. For track lines of minor importance, for example for branch lines or industrial track systems, prefabricated panels can be placed on the grown and appropriately leveled floor (level), which then form the foundation on which the track grate can be erected in the manner described.

Legend for the reference numbers:

1

ground

2nd

Concrete foundation

3rd

Mortar bed

4th

Concrete slab

5

threshold

6

rail

7

Liner

8th

bar

9

Anchor bolt

10th

Threaded plate

11

formwork

12th

room

13

Intermediate body

14

Cheeks

15

Face

16

Gutter

17th

drilling

18th

bottom

19th

Pad cams

20th

gap

21

dashed line

22

wedge

23

surface

24th

bar

25th

dashed line

Claims (8)

1. A track member, having rails (6) arranged in pairs, and having sleepers (5) of trapezoidal cross-section, which maintain the gauge, are arranged transversely to the rails and are connected thereto, and which rest at least by means of their end portions on a foundation plate (2) preferably made from concrete, via intermediate resilient layers (7), intermediate members (13) connected to the foundation plate being provided between the sleepers which extend in succession along the track member, the said intermediate members being made from concrete and formed as factory-produced elements, characterised in that the outer cross-sectional outline of the intermediate members (13) is trapezoidal, and the cheeks (14) thereof adjacent to the end portions of the sleepers converge downwardly, and the axial length (1) [sic] of the intermediate members (13) is the sane or slightly smaller than the length of the end portions of the sleeper (5), which portions project outwardly when seen from the rails (6), the said intermediate members (13) being screwed to the foundation plate, and intermediate resilient layers, preferably wedges (22), also being arranged at least between the adjacent cheeks of the end portions of the sleepers (5) and the intermediate members (13).
2. A track member in accordance with claim 1, characterised in that the intermediate members (13) are [each] traversed by a vertical through bore (17), preferably arranged in the central region of the said members, to receive a securing screw (9) which can be anchored in the foundation plate.
3. A track member in accordance with claim 2, characterised in that at least the region directly surrounding the vertical bore (17) which traverses the intermediate member (13) is sunk in relation to the surface (23) of the intermediate member (13).
4. A track member in accordance with claim 2 [sic], characterised in that the region which is sunk in relation to the surface (23) of the intermediate member (13) is formed as a channel (16) draining towards one of the end surfaces (15) of the intermediate member (13).
5. A track member in accordance with claim 1, characterised in that the lower surface (18) of the intermediate member (13) has bearing cams (19) which project in relation to the said surface.
6. A track member in accordance with claim 5, characterised in that three bearing cams (19), located at the corners of a notional triangle, are provided on the lower surface of the intermediate member (13).
7. A track member in accordance with claims 2 and 6, characterised in that the vertical bore (17) to receive the securing screw (9) is positioned within the notional triangle, preferably in the centre thereof.
8. A track member in accordance with one of claims 1 to 7, characterised in that the adjacent cheeks (14) of the intermediate member (13) and the end portion of the sleeper (5) delimit a gap (20) converging upwardly, to receive the wedge(s) (22) (Fig. 5).

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