EP2800833B1 - Slab track - Google Patents

Description

The invention relates to a fixed carriageway, with a concrete sleepers and rails having superimposed on a support layer track grid and dowels for anchoring the concrete sleepers on the support layer.

Such fixed carriageways have for some time been offered by the applicant under the name GETRAC (registered trademark). It is a fixed track with a ballastless superstructure, where the base course is usually asphalt. This roadway is characterized by a direct superimposition of the track grid on asphalt. The concrete sleepers are anchored on the asphalt layer by means of dowels. During installation, sleepers are laid on the asphalt layer and permanently anchored elastically using the anchor stone made of high-strength special concrete. The dowel stone is designed so that it can remove occurring track forces in the longitudinal and transverse direction in the asphalt layer. The asphalt layer is produced in a similar way as in road construction, the laying takes place in several layers with an automatically steered high-performance paver. On a Schottertragschicht or a hydraulically bound support layer, the bituminous support layer is applied.

A threshold with dowel stone and a method for producing a solid track with such a threshold is known from DE 102 30 740 A1 known. The dowel stone serves as a connecting element between the threshold and the supporting layer, to the concrete sleeper has on its underside a recess in which the dowel is used about half its height. The lower half of the dowel is inserted in a recess in the base layer and potted with a filler.

From the EP 1 288 371 A2 For example, a fixed carriageway threshold known as the GETRAC A3 fixed carriageway is known. The concrete sleepers have a central area with reduced width, they are wide sleepers, which are arranged only a short distance from each other. The cylindrical dowel is below the broad threshold on the one hand in a recess below the broad threshold and on the other hand in a Recess of the base layer placed and potted. The recess in the asphalt base course is rectangular and projects laterally beyond the middle area of the threshold with reduced width in order to allow subsequent filling with the filler material.

DE-10 2006 055 307 A1 shows a generic fixed track according to the preamble of claim 1.

Although such solid lanes, in which the sleepers are fixed with dowels, have proven very well in practice, the installation effort is perceived as high, since first the recess in the support layer must be made precisely. Subsequently, the threshold is placed together with the dowel in or over the recess and potted the dowel.

The invention is therefore an object of the invention to provide a solid track, in which the manufacturing cost is reduced.

To solve this problem is provided according to the invention in a fixed track of the type mentioned that the concrete sleepers have arranged between rail mounts central area with reduced width, in which on both sides of the concrete sleeper mounted on the support layer dowel stone is arranged.

The invention is based on the recognition that the installation of a fixed track can be simplified by dowels are mounted laterally on the concrete sleeper. This eliminates the costly attachment of the dowel stone below the threshold, the dowel stone is partially disposed in a recess below the threshold and partially in a recess of the support layer.

According to the dowel brick is designed as a trapezoid, that is as a spatial trapezoid. Preferably, it is a symmetrical trapezoid, which can be used rotated by 180 °.

In order to further facilitate the installation of the fixed track according to the invention, it is provided that the dowel block is fixed on a flat surface of the support layer. Accordingly, eliminates the costly production of a recess in the support layer, which previously had to be made with high accuracy. Instead, the necessary fixation of the threshold on the support layer is achieved by the positive connection between the dowel and the threshold, wherein the dowel is fixed on the flat surface of the support layer.

The dowel stone is also fixed with an asphalt adhesive or a concrete adhesive.

In the solid pavement according to the invention it is preferred that the area of reduced width tapers towards the underside of the concrete sleeper. The cross section of the reduced width area is thus smallest at the bottom of the concrete sleeper and increases toward the top of the concrete sleeper. This tapered shape allows the positive-locking arrangement a dowel to attach the threshold by means of the dowel on the support layer.

It is also within the scope of the invention that the concrete sleeper is designed as a monobloc concrete sleeper in prestressed concrete construction. The concrete sleeper is thus designed as an integral prefabricated concrete element with prestressed reinforcement, which can be positioned in this state on the support layer.

The roadway according to the invention is particularly well suited for base courses designed as asphalt base course or concrete base course. A further development of the invention provides that in the roadway according to the invention an intermediate layer is arranged on contact surfaces between dowel bricks and the region of reduced width of the concrete sleeper. Preferably, the intermediate layer may be made of an elastomer, a film or other compliant material, whereby stress peaks be mitigated. This prevents spikes leading to chipping on the concrete sleeper.

In special cases, a screwing of the dowel block may be provided with the support layer in the fixed carriageway, this can be introduced into the support layer, a dowel into which a dowel stone penetrating anchor bolt is screwed.

Preferably, the dowel brick is positively held between two adjacent concrete sleepers.

Virtually any thresholds can be used for the fixed track according to the invention, provided that the threshold has a central constriction.

Fig. 1

eine perspektivische Ansicht einer erfindungsgemäßen festen Fahrbahn;

Fig. 2

einen Schnitt durch die in Fig. 1 gezeigte feste Fahrbahn in Längsrichtung;

Fig. 3

eine vergrößerte Ansicht des in Fig. 2 gezeigten Dübelsteins;

Fig. 4

eine Seitenansicht eines Dübelsteins;

Fig. 5

den in Fig. 4 gezeigten Dübelstein um 90° gedreht;

Fig. 6

eine Ansicht des Dübelsteins von Fig. 4 von oben;

Fig. 7

eine perspektivische Ansicht des Dübelsteins von Fig. 4;

Fig. 8

einen Schnitt durch eine erfindungsgemäße feste Fahrbahn mit dem in Fig. 4 gezeigten Dübelstein;

Fig. 9

eine Ansicht der festen Fahrbahn von Fig. 8 in Längsrichtung; und

Fig. 10

einen Ausschnitt der festen Fahrbahn von Fig. 8 in einer Ansicht von oben.

The invention will be explained below with reference to embodiments with reference to the drawings. The drawings are schematic representations and show:

Fig. 1

a perspective view of a fixed track according to the invention;

Fig. 2

a section through the in Fig. 1 shown solid track in the longitudinal direction;

Fig. 3

an enlarged view of the in Fig. 2 shown dowel brick;

Fig. 4

a side view of a dowel brick;

Fig. 5

the in Fig. 4 Dowel stone shown rotated by 90 °;

Fig. 6

a view of the dowel stone of Fig. 4 from above;

Fig. 7

a perspective view of the dowel stone of Fig. 4 ;

Fig. 8

a section through a solid pavement according to the invention with the in Fig. 4 Dowel stone shown;

Fig. 9

a view of the fixed lane from Fig. 8 longitudinal; and

Fig. 10

a section of the fixed carriageway of Fig. 8 in a view from above.

In the Fig. 1 shown fixed carriageway 1 consists essentially of concrete sleepers 2, which are designed as a monobloc sleepers in prestressed concrete construction and are arranged side by side at a small distance. Each concrete sleeper 2 carries a pair of rails, rails 3 are fastened by means of rail fasteners 4 at the top of the concrete sleepers 2. The concrete sleepers 2 and the rails 3 together form a track grid, which is supported on a support layer 5. In the illustrated embodiment, the support layer 5 is formed as an asphalt base course, but other embodiments are possible in which the support layer is formed as a concrete base layer.

In Fig. 1 it can be seen that each concrete sleeper has a region 6 of reduced width arranged between the rail supports, which tapers downwards, that is to say towards the underside of the concrete sleeper 2.

A dowel 7, which consists of a special concrete and is designed as a trapezoid, is arranged in the region 6 with reduced width of the concrete sleeper 2 and fixed on the support layer 5 by means of an asphalt adhesive. In a similar way, there is another dowel on the opposite side of the concrete sleeper 2, which in Fig. 1 is not visible. The dowel brick 7 has downwardly tapering side surfaces which are exactly adapted to the side surfaces of the region 6 with reduced width of the concrete sleeper 2. That is, the inclined edges of the dowel 7 and the reduced width portion 6 have the same inclination angle. Accordingly, there is a concrete threshold between the dowel 7 and the area 6 with reduced width Form fit that allows the transfer of forces. Thus, forces occurring during operation can be removed from the rails 3 via the concrete sleepers 2 and the dowels 7 in the support layer 5. It is not necessary that each concrete sleepers 2 is held laterally by two dowels 7, in practice it is sufficient if it is z. B. every second, third or fourth concrete sleeper is fixed laterally by two dowels.

In the production of the fixed lane 1 of the concrete sleepers 2 and the rails 3 existing track grid is placed on the support layer 5, after aligning the selected concrete sleepers 2 are fixed by dowels 7, respectively in pairs on both sides of the concrete sleeper 2 in the area 6 are arranged with reduced width. Since the contour of the dowels 7 corresponds exactly to the contour of the concrete sleeper 2 in this area, a positive connection between concrete sleeper 2 and dowel 7 is formed.

Fig. 2 shows a section through the fixed lane 1. There you can see that the two side of the concrete sleeper 2 arranged dowels have a decreasing in the direction of the support layer 5 cross section through the positive connection movement of the concrete sleeper 2 is prevented. The concrete sleeper 2 is thus held positively between the dowels 7.

Fig. 3 is a sectional view showing the dowel 7 in an enlarged view. It can be seen there that the dowel brick 7 is fixed by means of an asphalt adhesive 8 on the support layer 5. In the contact area between the dowel block 7 and the area 6 with reduced width of the concrete sleeper 2, an intermediate layer 9 is arranged, which consists of an elastomer and reduces voltage spikes. As a result, chipping on the concrete sleeper 2 are avoided.

The Fig. 4 to 7 show a second embodiment of a dowel block 10, which tapers upwards differently than the dowel block 7 shown in the first embodiment. In the 4 and 5 it can be seen that the dowel block 10 has a trapezoidal cross-section, wherein the cross-sectional area tapers from the bottom to the top. In the Fig. 6 and 7 is shown that the dowel stone 10 is limited by six side surfaces, the top 11 of the dowel block 10 is formed by four surfaces having a low inclination, in the illustrated embodiment, the inclination is about 1%.

The inclination of the vertical surfaces in the illustrated embodiment is 10: 1. When installed, the dowel 10 is surrounded by an elastomer (not shown).

The Fig. 8, 9 and 10 show a fixed track 12, consisting of concrete sleepers 2, rails 3 and rail fasteners 4, which respectively correspond to those of the first embodiment. Between two adjacent concrete sleepers 2 each a dowel block 10 is arranged, whereby the concrete sleepers 2 are held on a support layer.

In addition, the fixed track 12 substantially corresponds to the fixed track 1 of the first embodiment, which in the Fig. 1 to 3 is shown.

Claims (6)

1. Non-ballasted track (1) with a track panel supported on a base course (5) having concrete sleepers (2) and rails (3), and anchor blocks (7, 10) for anchoring the concrete sleepers (2) on the base course (5), wherein the concrete sleepers (2) comprise a central region (6) with reduced width disposed between rail supports, in which an anchor block (7, 10) fastened on the base course (5) is disposed on either side of the concrete sleeper (2), characterized in that the anchor block (7, 10) is configured as trapezoid and fixed on a flat surface of the base course (5) by means of an asphalt adhesive (8) or by means of a concrete adhesive.
2. Non-ballasted track according to claim 1, characterized in that the region (6) with reduced width tapers in the direction of the underside of the concrete sleeper (2).
3. Non-ballasted track according to claim 1 or 2, characterized in that the concrete sleeper (2) is configured as mono block concrete sleeper in pre-stressed concrete.
4. Non-ballasted track according to one of the preceding claims, characterized in that the base course (5) is configured as asphalt base course or concrete base course.
5. Non-ballasted track according to one of the preceding claims, characterized in that an intermediate layer (9) preferably made of an elastomer is disposed on the contact surfaces between the anchor block (7, 10) and the region (6) with reduced width of the concrete sleepers (2).
6. Non-ballasted track according to one of the preceding claims, characterized in that the anchor block (7, 10) is retained between the two adjacent concrete sleepers (2) in a positively locked manner.

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