DE102006003098B4 - Track construction for rail vehicles - Google Patents

Abstract

infrastructure construction for rail vehicles, comprising a superstructure with sleepers (1) made of concrete, steel, wood or plastic and highly elastic and / or vibration damping Rail fasteners and a substructure, characterized that the threshold (1) on and / or in a bedding of an at least consisting of minerals unbound first grain mixture (3) with a grain size of at least 2 mm and the upper layer of the inclined to the discharge of surface water provided substructure an elastic, vibration damping Support layer of an unbound at least consisting of minerals second grain mixture (4) with graded grain size and a degree of compaction with a Proctor density of 94% to 98%, with the second Grain mixture (4) fine-grained as the first grain mixture (3).

Description

The The invention relates to a track construction for rail vehicles according to the preamble of claim 1.

Such a track construction is through the EP 0 549 559 A1 known.

roadways for rail vehicles conventionally a substructure in the form of the existing, planed earth body or of engineering structures, such as bridges, retaining walls, dams, road cuts etc. on. Furthermore, they comprise a superstructure made of a gravel base layer with a relatively homogeneous, coarse grain size, in and on the thresholds lie. The gravel grains touch only on the edges and subject to high loads and speeds of modern heavy traffic rail traffic. In this way and by the large interspaces despite the compression the gravel grains, There are setting movements of the superstructure and thus undesirable changes in position and a temporal drift in the elasticity and the damping properties, the one require high conservation effort. The track position must be at regular intervals by means of stuffing / straightening machines Getting corrected. At higher Frequencies lose the usual Gravel its elasticity largely. unfavorable Vibration overlays can cause that the gravel instead of dampening vibration enhancing acts.

For solutions with bound mineral grain mixture, as they are known from the DE 296 02 281 U1 or the DE 39 41 142 A1 Although such conservation measures are less frequently required, but then with great effort, since the bound ballast is difficult to absorb. In addition, the elasticity is limited.

One alternative approach is the construction of driveways with so-called "solid Roadway " the track rust on a support plate, e.g. made of concrete, hung up. at the known types of "festivals Roadway " across from the conventional one Superstructure above all disadvantages in the relatively complicated rail fastening, which requires a high manual and mechanical effort for setup and correct the elevation and lateral position of the rail required. The creation, demolition and renewal effort is very high. First experiences with the "slab track" on routes with high speed show that in particular at the usual rigid constructions the expected longer service life because of occurring wear-promoting Cracks and ingress of water is doubtful, with which also the justification for the much higher Creation costs questionable becomes. A systematic vibration reduction is made by the rigid masses the "festivals Roadway "rather obstructed.

Starting from the EP 0 549 559 A1 The invention is based on the object to provide a track layout for rail vehicles, which allows both high elasticity and good damping properties and high track stability with low creation and maintenance costs.

The The object is achieved by a track construction with the features of claim 1.

advantageous Embodiments of the invention are the subject of the dependent claims.

The inventive track construction for rail vehicles includes a superstructure with conventional Sleepers made of concrete, steel, wood or plastic and highly elastic and / or vibration damping Rail fasteners and a substructure. The thresholds are directly and firmly on and in a well-compacted bedding from a predominantly consisting of minerals unbound first grain mixture with a grain size of at least 2 mm, preferably of crushed material. This rests on the top Layer of the substructure, which consists of an elastic, vibration-damping Base layer of a predominantly consisting of minerals unbound second grain mixture with graduated grain size and a Degree of compaction with a Proctor density of 94% to 98%, this second grain mixture being finer grained than the first one. Of the Substructure has a tendency to drain surface water can. The Compaction leads too high dimensional stability of the second grain mixture, thus concluding a mixing with the first batch of grain largely and avoids uneven or larger subsidence, allowing a high level of stability of the track is reached. The achieved by the described structure additional vibration damping is largely independent of fluctuating weather conditions and different frequencies due to different speeds. The overall structure allows a fully mechanized or semi-automatic position correction with conventional, optionally adapted overhead machinery.

The second grain mixture in the top layer of the substructure is preferably a gravel having a graded grain size of at most 32 mm or alternatively a crushed material having a graded grain size of at least 2 mm. The use of gravel is less expensive on low-load lines. Broken material offers for higher loads a higher shear strength and thus better resistance to displacement, as he is desirable in particular because of the high horizontal forces when operating trains with tilting technology.

In a particularly preferred embodiment is the surface the second grain mixture with a bituminous mass, in particular one Epoxy bitumen water emulsion sealed and glued. This improves the properties of the substructure Water drainage, frost protection and load capacity.

Preferably the first grain mixture is covered with conventional ballast, In order to prevent grains at high speeds be stirred up first grain mixture. The gravel can additionally with a bituminous Covered layer, whereby the gravel covered and the dust accumulation is reduced, so that the infrastructure construction less polluted.

In a preferred embodiment contains the first grain mixture and / or the second grain mixture rubber granulate, about elasticity and damping characteristics continue to improve. In particular, the rubber granules provides the smallest grain fraction of the respective grain mixture.

embodiments The invention will be explained in more detail below with reference to drawings.

In this demonstrate:

1 a longitudinal section through a track construction with sleepers, a superstructure and a substructure,

2 a cross-section through a track construction with sleepers, a superstructure and a substructure, and

3 a cross section through a track construction with sleepers, a superstructure with a bituminous cover layer and a substructure.

each other corresponding parts are in all figures with the same reference numerals Mistake.

1 shows a longitudinal section through a guideway structure with thresholds 1 on which vibration-damping liners 2 made of plastic. The thresholds 1 lie on and in a bedding belonging to the superstructure of an unbound first grain mixture consisting of minerals 3 with a grain size of 5 to 45 mm. Underneath is an upper layer of a substructure consisting of an unbound second grain mixture consisting of minerals 4 with a grain size 0 to 32 mm. The second crop of corn 4 is at the surface inclined to discharge surface water by a bituminous mass 5 sealed, which consists for example of terepoxide mixture and at the same time a bonding of the surface grain of the second grain mixture 4 causes. This takes over functions such as water drainage, frost protection and increasing the load capacity. The first cornmeld 3 is with a conventional gravel 6 covered. In 2 the same guideway construction is shown as a cross section. The layer thickness of the first grain mixture is dimensioned so that a plug with a planned stuffing technique is possible. When using stuffing machines, the layer has a thickness of the order of 10 cm. With manual stuffing, the layer thickness can be lower.

In 3 FIG. 3 is a cross-sectional view of an embodiment of a landing gear structure in which the conventional ballast. FIG 6 with a thin bituminous covering layer 7 is provided to stabilize the gravel layer and at the same time to reduce dust.

In an alternative embodiment may contain rubber granulate in the first and / or second crop be to elasticity and damping continues to improve. In particular, the rubber granules in this case smallest grain fraction of the respective corn mixture.

1

threshold

2

liner

3

first grain mixture

4

second grain mixture

5

Bituminous mass

6

conventional gravel

7

covering

Claims (8)

Track construction for rail vehicles, comprising a superstructure with sleepers ( 1 ) made of concrete, steel, wood or plastic and highly elastic and / or vibration damping rail fasteners and a substructure, characterized in that the threshold ( 1 ) on and / or in a bedding of an unbound first grain mixture consisting of minerals ( 3 ) with a grain size of at least 2 mm and the upper layer of the substructure provided with a tendency to discharge surface water, an elastic, vibration-damping support layer made of at least one of minerals unbound second crop of corn ( 4 graded grain size and a degree of compaction with a Proctor density of 94% to 98%, the second grain mixture ( 4 ) finer-grained than the first grain mixture ( 3 ). Track construction according to claim 1, characterized in that the second grain mixture ( 4 ) consists at least of gravel with a graded grain size of a maximum of 32 mm. Track construction according to claim 1, characterized in that the second grain mixture ( 4 ) consists at least of broken material with a graded grain size of at least 2 mm. Track construction according to one of the preceding claims, characterized in that the surface of the second grain mixture ( 4 ) with a bituminous mass ( 5 ) is sealed and glued. Track construction according to claim 4, characterized in that the bituminous mass ( 5 ) is formed as an epoxy-bitumen water emulsion. Track construction according to one of the preceding claims, characterized in that the first grain mixture ( 3 ) with conventional ballast ( 6 ) is covered. Track construction according to one of the preceding claims, characterized in that the first grain mixture ( 3 ) and / or the second cornmeal ( 4 ) Contains rubber granules. Track construction according to claim 7, characterized in that that the rubber granulate is the smallest grain fraction of the respective Korngemenges is.