EP1644581B1 - Method for the construction of a track structure for railborne vehicles, particularly trains - Google Patents

Abstract

A track structure for railborne vehicles comprising a bed on which rails fastened to sleepers are seated. The structure comprises a concrete trough seated on a substructure and having walls extending in the longitudinal direction. The side walls are spaced apart parallel to one another at least by a sleeper length. A method of manufacturing of the structure is also provided.

Description

The invention relates to a method for producing a track structure for rail vehicles, in particular railways.

DE-A 100 04 194 describes a method for producing a fixed rail track on a bridge.

For a track structure itself, a ballast bed is initially formed, the usually made of weather-resistant hard rock, z. B. basalt, depending on the track load in different grain size. The standard bed height up to the threshold lower edge is 30 cm. On this gravel bed associated with concrete or wooden sleepers rails or rail tracks are placed. To push gravel under the sleepers track tamping machines are used. These machines are equipped with pimples, which, under the control of hydraulics, press the ballast under the sleepers. In order to allow rainwater to run off and the rails are not under water, the ballast bed must be regularly cleaned of debris. For this, the gravel must be picked up, sieved and then put back on the track bed. Then it has to be stuffed again. The laying of the rails and the maintenance of the track bed is therefore time consuming and costly.

The AT-B-390 976 describes a method for producing a ballastless superstructure, are arranged in the prefabricated support plates with concrete on the pre-consolidated ground.

EP-A-0 663 470 describes a railway track superstructure with a U-shaped concrete trough of reinforced cast-in-place concrete laid in the track direction and provided below each track with a sleeper bearing protruding from the sole surface of the concrete trough, the trough following the alignment of the track rail filled in compacted gravel filled with a mortar suspension. The side walls of the concrete tub are spaced apart at least in threshold length L parallel to each other.

In DE-A-41 33 905 prestressed concrete composite slabs are disclosed for railway superstructures, which rest on a U-shaped styrofoam concrete support and insulation layer, wherein the prestressed concrete composite slab consists of a prestressed concrete cover layer and a prestressed concrete support layer and by means of a Capsule press can be seamlessly biased over a length of 400 m in the entire thickness and the fresh concrete of the prestressed concrete cover layer is introduced as a shotcrete to achieve a permanent bond with the support layer. On the surface of the prestressed concrete cover layer, gravel stones are spread which are glued to the surface of the cover layer with a bituminous adhesive.

Starting from the problem explained above, a new method for producing a track structure is to be specified, which allows the production of the substructure and superstructure and the laying of the rail tracks easily and inexpensively. In addition, the track structure produced by these methods should ensure the highest possible noise insulation and reduce the time for maintenance.

• a) Gießen eines Unterbaues aus einem Leichtbeton insbesondere einem Schaumbeton mit einer Dichte von 400 - 500 kg/m³;
• b) Auflegen vorgefertigter Wannen-Segmente auf den Unterbau zur Ausbildung einer Betonwanne mit sich in Längsrichtung erstreckenden, parallel beabstandeten Seitenwangen;
• c) Ausrichten der Wannen-Segmente zueinander;
• d) Einlegen von auf Schwellen befestigten Schienensträngen zwischen die Seitenwangen.

To solve the problem, the method according to the invention is characterized by the following steps:

• a) casting a substructure made of a lightweight concrete, in particular a foam concrete with a density of 400 - 500 kg / m ³ ;
• b) placing prefabricated tub segments on the base to form a concrete tub having longitudinally extending, parallel spaced sidewalls;
• c) aligning the tub segments with each other;
• d) placing rail tracks fastened on sleepers between the side bolsters.

Due to this configuration, the ballast bed completely eliminated. The lateral support of the sleepers is taken over by the sidewalls. The laying of the rail tracks is much easier, because they only have to be inserted into the concrete tub. The plug is completely eliminated. Over the course of time accumulating debris can simply be sucked off. The maintenance work can be carried out very easily and inexpensively. It can be assumed that in this track construction by the pull of fast moving trains light materials, such as leaves, are automatically removed from the track bed. The maintenance intervals are therefore also extended. Worn or damaged track parts can be easily replaced.

The substructure is poured on site from lightweight concrete, in particular from foam concrete with a density of 450 kg / m ³ . Expansion joints are not mandatory. The concrete tank is preferably made of steel-reinforced foam concrete. Foamed concrete is referred to as "cellular concrete" in English-speaking countries. The steel-reinforced concrete tub is placed on the substructure hung up. It may optionally be laterally covered with soil. By the use of foam concrete will be achieves high sound insulation values, which reduces the noise caused by passing trains.

The substructure has a density of preferably 400-650 kg / m ³ , in particular preferably 450 kg / m ³ . The concrete trough preferably has a density of 1100 - 1900 kg / m ³ , in particular 1500 kg / m ³ .

If the rails preferably project beyond the side cheeks in the vertical direction, it is ensured that even with heavy rainfall the rail surface is freely passable and the vehicle wheels do not drive through dammed up water.

If the parallel distance of the side cheeks corresponds to the threshold length, an automatic centering takes place when inserting the rail tracks.

So that rain or melt water can be removed quickly from the track structure, the side walls of the concrete tub are preferably provided with a plurality of wall openings, in which pipes are preferably used in particular.

For later laying of supply lines or the like, at least one empty tube can be integrated into the substructure.

It is particularly advantageous if the concrete trough consists of individual prefabricated segments, which can be placed on the base made on site and connected to each other. The production of the track structure is further simplified and the construction time further reduced. In addition, individual segments can be easily replaced if necessary, which reduces the maintenance costs.

In order to align the individual segments to each other and to fix them laterally, the bottom of each segment is preferably provided at its ends with a central slot or a notch, in which an insert can be inserted, which is preferably T-shaped in cross section. This insert prevents a lateral drift apart of the segments.

For centering the segments and securing the butt joint against lateral displacement inserts are preferably inserted in central, provided in the bottom of the tub segments slots.

Figur 1 -

eine perspektivische Ansicht des Gleisaufbaus;

Figur 2 -

die Draufsicht auf einen Gleisaufbau;

Figur 3 -

eine Teildarstellung der Betonwanne gemäß Sichtpfeil III nach Figur 2;

Figur 4 -

einen Einsatz in perspektivischer Darstellung;

Figur 4a -

einen weiteren Einsatz in perspektivischer Darstellung;

Figur 5 -

den Schnitt entlang der Linie V-V nach Figur 2.

With the aid of a drawing, an embodiment of the invention will be described in more detail below. It shows:

FIG. 1 -

a perspective view of the track structure;

FIG. 2 -

the top view of a track structure;

FIG. 3 -

a partial view of the concrete tub according to visual arrow III of Figure 2;

FIG. 4 -

an insert in perspective view;

FIG. 4a -

another use in perspective view;

FIG. 5 -

the section along the line VV of Figure 2.

The track construction consists of the substructure 5, which is cast on site from lightweight concrete, in particular foam concrete, as it is produced for example by the Canadian company CEMATRIX. For this purpose, a usual shuttering is necessary. The foam concrete can be mixed on site. For foaming, bubble-forming substances (air injection) are used. In the substructure 5 at least one empty tube 6 is integrated, can be pulled through the later supply lines. The substructure 5 is provided with slightly upwardly drawn side cheeks 5a, 5b. The use of foam concrete is common in road construction. Foamed concrete is characterized by good sound absorption properties and high thermal insulation.

Between the side walls 5a, 5b prefabricated segments S made of reinforced concrete are inserted. Several juxtaposed segments S form a concrete tub 4 with a bottom 4c and in the vertical direction pointing side cheeks 4a, 4b. The width of the segment S is chosen so that they are exactly inserted between the side walls 5a, 5b of the base 5, whereby a lateral displacement of the concrete tub 4 is prevented. The segments (S) are produced in a length of 5 - 15 m.

In the side cheeks 4a, 4b of each segment 4, a plurality of apertures 7 are provided, are inserted into the tubes, whereby in the tub 4 accumulating water can drain to the outside. At its two ends, the segment S is provided with a notch or a slot 9, which is arranged centrally in the bottom 4c. In this notch 9 is a cross-sectionally T-shaped insert 8 can be inserted. Two abutting segments S are aligned with each other via this insert 8 and fixed laterally, whereby the butt joint can be secured. To better secure the butt joint shown in Figure 4a, cross-shaped cross-shaped insert 8 'can be used. The additional leg 8 "can be taken or used in the substructure 5.

The prefabricated segments S are then placed individually on the substructure 5. In the concrete tub 4 3 fixed rail tracks 1, 2 are inserted on concrete or wooden sleepers. The inner dimension between the side walls 4a, 4b of the tub 4 corresponds to the length L of the thresholds 3, so that the concrete tub 4 takes over the lateral guidance of the rail tracks 1, 2.

As can be seen from FIG. 5, the side cheeks 4a, 4b of the trough 4 are slightly higher than the thickness of the sleepers 3, so that the sleepers are completely immersed in the trough, while the rail cords 1, 2 fastened on the sleepers 3 are placed over the trough 4 protrude. Laterally to the tub 4 soil 10 is poured, covering the substructure 5.

The substructure 5 consists of preferably non-reinforced lightweight concrete with a density of 400-700 kg / m ³ . Good results have been obtained with a density of 450 to 650 kg / m ³ . The tub 4 is made of reinforced concrete with a galvanized reinforcement and a density of 1100 - 1900 kg / m ³ , with good results were achieved at a density of 1500 kg / m ³ .

LIST OF REFERENCE NUMBERS

1

Rail / rail track

2

Rail / rail track

3

threshold

4

Concrete tub / tub

4a

side cheek

4b

side cheek

4c

ground

5

substructure

5a

side cheek

5b

side cheek

6

conduit

7

breakthrough

8th.

commitment

8th'

commitment

8th"

leg

9

Slot / notch

10

soil

L

threshold length

S

segment

Claims (10)

1. Method of producing a track structure for railborne vehicles, particularly trains, characterized by the following steps:

   a) casting a substructure (5) from a lightweight concrete, in particular a foamed concrete having a density of 400 - 500 kg/m³;

   b) placing prefabricated trough segments (S) on the substructure (5) to form a concrete trough (4) having side walls (4a, 4b) spaced apart in parallel and extending in the longitudinal direction;

   c) aligning the trough segments (S) with one another;

   d) fitting rail sections (1, 2) fastened to sleepers (3) between the side walls (4a, 4b).
2. Method according to Claim 1, characterized in that inserts (8) are fitted into central slots (9) in the base (4c) to centre the segments (S) and secure the butt joint against lateral displacement.
3. Method according to Claim 2, characterized in that inserts (8), which are T-shaped in cross section, are fitted into the slots (9).
4. Method according to one or more of the preceding claims, characterized in that the concrete trough is cast with a density of 1100 - 1900 kg/m³, in particular 1500 kg/m³.
5. Method according to one or more of the preceding claims, characterized in that the rails protrude beyond the side walls (4a, 4b) in the vertical direction.
6. Method according to one or more of the preceding claims, characterized in that at least one empty pipe (6) is inserted in the substructure (5).
7. Method according to one or more of the preceding claims, characterized in that a multiplicity of wall openings (7) are made in the side walls (4a, 4b).
8. Method according to Claim 7, characterized in that pipes are inserted into the wall openings (7).
9. Method according to Claim 1, characterized in that the concrete trough (4) consists of steel-reinforced foamed concrete.
10. Method according to Claim 1, characterized in that the substructure (5) has a density of 450 kg/m³.

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