Railways: surface track – Roadbed – Continuous
Patent
1997-01-14
1998-08-04
Morano, S. Joseph
Railways: surface track
Roadbed
Continuous
E01B 100
Patent
active
057881537
DESCRIPTION:
BRIEF SUMMARY
SPECIFICATION
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a National Phase Application of PCT/EP95/02906 filed 22 Jul. 1995 and based, in turn, on German National Application P 44 27 237.5 filed 2 Oct. 1994 under the International Convention.
1. Field of the Invention
The invention relates to an infrastructure for railway tracks with continuous elastic support, whereby the two rails forming the track are supported, via elastic intermediate layers, with their lateral limiting surfaces located underneath the rail head against the inner lateral surfaces of a frame consisting of two frame halves and whereby under each rail a longitudinal concrete sleeper is provided.
2. Background of the Invention
As a rule tracks for rail vehicles are laid on beds, grit or compacted and optionally reinforced soil, on embankments of compacted material or on concrete plates, which lie directly on the ground (DE-OS 29 01 283, DE-OS 23 54 958). Such tracks are also frequently laid on gravel. The soil, as well as the gravel are, elastic within certain limits, thus forming a spring cushion which provides a minor damping of the impact noise.
When in tracks laid out in the above manner elastically supported rails are used for further reduction of the vibrations resulting from the vehicle movements on the tracks and the related impact noise, a frequency at which the elastic rail support acting as a spring vibrates rather increases the noise generated by the vehicle's movement.
Further, an infrastructure is known wherein under each rail of the track a longitudinal sleeper is provided, consisting of a continuous rigid girder (DE-OS 40 27 836). Due to this construction of the infrastructure, the latter has such a high bending moment that a no or only a negligible bending of the infrastructure can take place and therefore eliminating the spring effect of the support layer.
3. Object of the Invention
It is the object of the invention to improve infrastructures of the aforementioned kind.
SUMMARY OF THE INVENTION
This object is achieved in generic infrastructures in that trough, while the other frame half is supported via a wedge, screws, and
The production of the infrastructure of the invention takes place so that at first, the rails are aligned and then the trough is brought into the required position in relation to the rail. After that the elastic intermediate layers, the two frame halves and the wedge are inserted in the trough. Finally the plate consisting of concrete is produced from site-mixed concrete. As a result the production of the infrastructure is extremely simple. The soil or a casing can serve as a lateral limit for the site-mixed concrete, or the concrete plate can be produced through the sliding molding method.
In addition to the above the infrastructure of the invention has the following features: costs; or physical means;
The infrastructure of the invention allows a prestressing of the elastic padding provided between the rail and the two frame halves. At first, a certain preliminary stress is caused by the setting of the wedge. A further preliminary stress can be caused by using wedges of various width. Also inserting foils or thin plates between the wedge and the frame half bordering thereon can produce a further stress.
In the invention one of the frame halves is formed by the first lateral trough wall. This embodiment of the invention is particularly simple and can be used especially for rectilinear tracks, while the aforedescribed embodiment of the invention is provided especially for curves with small radii.
The trough can be made of sheet metal or of a section of any desired material. However it is advantageous to make the trough of a section of plastic material. Such a section of plastic material can be produced at very low cost.
Since the trough is not subjected to heavy loads, it requires only reduced wall thickness. According to a feature of the invention, the wall thickness of the trough ranges between 3 mm and 10 mm.
In order to afford sufficient stability to the trough, it is provided
REFERENCES:
patent: 3417921 (1968-12-01), Maynier
patent: 4793545 (1988-12-01), Raymond
patent: 5538182 (1996-07-01), Davis et al.
patent: 5609294 (1997-03-01), Lucas, Jr.
Dubno Herbert
Kateshov Yuri
Morano S. Joseph
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