Railways: surface track – Roadbed – Street crossing
Patent
1997-05-06
1998-09-01
Morano, S. Joseph
Railways: surface track
Roadbed
Street crossing
E01C 904
Patent
active
057998680
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a multi-track road crossing including a roadway located at the level of the rails, which roadway is formed at each track by self-supporting slabs elastically supported on the rail bases on at least one side, i.e. inner slabs bridging the space between the two rails of the respective track and supported on these two rails, and outer slabs each covering a strip-shaped region externally of the rails of the respective track and elastically supported on the externally pointing rail bases at their side facing these rails, and supported on supporting bodies laid beside the respective track on their side facing away from these rails, the roadway in the middle of the intermediate region between neighbouring tracks being formed by a filling.
In known multi-track road crossings of the initially mentioned type the roadway in the intermediate region between neighbouring tracks is formed by a filling in the form of an asphalt bituminous mixture roadway covering. Thus, the individual track portions are to be considered as separated by this intermediate region. This asphalt strip has a roadway grip behaviour different from that prevailing in the track region, where e.g. concrete slabs are laid, thus adding additional danger to the risks of a road portion which already bears various risks for road traffic. Moreover, the asphalt layer tends to become crushed and fluted by the pressure of the wheels of heavy vehicles and to become faulty due to brittleness, and the asphalt covering rests on its own bed of crushed stone on the soil and does not follow level changes of the track. Moreover, during maintenance work carried out on the tracks, as a rule the asphalt covering must be torn up and then remade (e.g. because of a new or changed level, respectively), with negative consequences for road traffic because such asphalt work in this intermediate region mostly requires a partial or complete closing of this section of the road, and a further disadvantage resides in the fact that in most cases only small construction equipment can be used for the asphalt work, or the repair work can be carried out by hand only.
SUMMARY OF THE INVENTION
The invention has as its object to provide a multi-track road crossing in which the disadvantages of known level crossings as previously mentioned are avoided. The road crossing according to the invention is characterized in that the filling is formed by self-supporting compensating slabs which, at both of their longitudinal rims, are supported on the supporting bodies that also support the outer slabs.
The advantages of this design with compensating slabs consist in that equal roadway characteristics, in particular an equal grip behaviour of the roadway surface in the entire transition area, are provided and problems of level cannot occur because the compensating slabs are supported on the same supporting bodies as the outer slabs. Even after extended periods of time there will be no changes in the levels of the slab surfaces relative to each other. For the purpose of maintenance work, the compensating slabs can be lifted off easily and without requiring much time, and their production and storage will be economically suitable since compensating slabs can be comparatively narrow. A major part of the distance between the tracks is covered by the outer slabs which can be made of uniform dimensions because of the use of compensating slabs. The compensating slabs may be lifted off at any time without any problems, and the space below the compensating slabs can be utilized to guide cables or the like therein.
Furthermore, the supporting bodies supporting the compensating slabs can be superposed or positioned easily on the pedestals prepared for the latter of site-mixed concrete or concrete blocks, resulting in a good seating of the said compensating slabs. To prevent possible shifts of the supporting bodies as could possibly occur on account of high traffic loads it is, e.g., possible to interconnect oppositely arranged supporting bodies by means
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Gmundner Fertigteile Gesellschaft m.b.H. & Co. KG
Morano S. Joseph
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