DE2039033C3 - Railway superstructure in which the rails rest on prefabricated concrete slabs - Google Patents

Description

30th

The invention relates to a railway superstructure in which the rails are lined up against one another Relative longitudinal and transverse movements secured, interconnected in the longitudinal direction of Cleis, prefabricated Concrete slabs rest and between the concrete slabs and an underlying base layer on which tlie concrete slabs true to size in their longitudinal edge areas are stored, an intermediate space is provided, which is covered with a foam or a foam After the concrete slabs have been laid, the foam-filler mix is filled with foam, with the foam or the Foam-packing mixture in one arranged between the respective concrete slab and the supporting layer Foil pocket is injected.

The magazine "ETR-Eisenbahntechnische Rundschau", 1969, issue 8, p. 294 and 295, is already the Formation of a railway superstructure known in which concrete slabs commonly used in motorway construction are used connected in the longitudinal direction of the track and secured against relative longitudinal and transverse movements. A styrofoam lightweight concrete layer is provided for thermal insulation, which is »Driven up and distributed and compacted with the black pavers used in road construction will.

The formation of a railway superstructure with a substructure made of Styrofoam lightweight concrete, which has to set, is relatively time consuming. The styrofoam lightweight concrete needs about 5 days to drive on the track can. In addition, a full support of the concrete slabs on the styrofoam lightweight concrete is not in secured to the desired dimensions.

However, the problem of full support can already be seen as solved. In the German Auslegeschrift 19 14 712 a method for producing a railway superstructure is proposed, where the space between the base course and the concrete slabs after this is true to size have been laid, is subsequently filled with foam, the foam being injected into a foil pocket which acts as a moisture barrier against the base course The one produced by this process The railway superstructure has a filler layer that is obtained due to the foaming process Foam pressure fully fills all spaces Frost, largely protected

However, experience has shown that in the railway superstructure according to the older proposal the German Auslegeschrift 19 14 712 the subsequent Foaming of the space between the concrete slabs and the base course is relatively time-consuming is. In order to improve this, the invention therefore proposes that the concrete slab is provided on its underside with a covering plastic plate, the free surface of which is loosely covered by the foil pocket fixed with its outer edges on the concrete slab.

This has the advantage that only a relatively small, Empty space remaining between the ballast bed and the plastic plate must be filled with foam. In addition comes that the concrete slabs including the Kunsfstoffplatten as well as the foil bags as a uniform Components can be prefabricated, making laying on the construction site easier and faster is to be carried out.

It is useful if the plastic plate is made of cellular polyurethane elastomers.

In the drawing are two examples Embodiments of the invention shown. It shows

F i g. 1 shows in cross section a railway superstructure using one attached to the concrete slabs Plastic plate with a foil pocket and

2 shows a representation according to FIG. 1, wherein the The superstructure is installed directly on a stable building site without the use of a ballast bed.

According to FIG. 1, the first treated ballast 1 of the substructure crown is cleaned and turned back into one flat bed up to about 30 cm thick. The edge areas 2 are then mortared and receive a precisely dimensioned smooth final layer 3 consisting of fast-setting cement mortar does not need the mortar of course? Cement base to be made. Rather, there is also a Plastic modified mortar conceivable. The final layer 3 is then with a sealing edge strip 4 covered.

The resulting trough 5 is covered with concrete slabs 10, the underside of which with a plastic plate 15 is covered. The latter is enveloped by one Foil pocket 16, which is fixed with its outer edges on the concrete slab 10 and under the plastic plate 15 leaves a free space of about 1 cm in height.

This has the advantage that the concrete slabs 10 including the plastic plates i5 and the Foil pocket 16 can be prefabricated as a single component. Laying on the The construction site is therefore very much easier and, in particular, much faster to be carried out. Another advantage can be seen in the fact that then only a relatively small one, between the gravel bed and Plastic plate remaining empty space must be filled with foam. For this purpose, the corresponding Packing body 9 and the plastic foam 11 in the

F \ Mientasche! 6 introduced, which thereby the Contours of the ballast bed 1 adjusts exactly.

The construction and installation of the railway superstructure according to FIG. 2 essentially correspond to those of FIG. 1. However, this type of construction will preferably be used for new buildings, in which case the lateral mortaring the ballast as well as the ballast substructure itself can be dispensed with.

For this purpose 2 sheets of drawings

Claims (2)

Patent claims: 1. Railway superstructure, in which the rails are lined up against each other, against relative longitudinal and Transverse movements secured, prefabricated concrete slabs connected to one another in the longitudinal direction of the track rest and between the concrete slabs and an underlying base layer on which the Concrete slabs are stored true to size in their longitudinal edge areas, an intermediate space is provided is, which with a foam or a foam-packing mixture after laying the Concrete slab is filled with foam, the foam or the foam packing mixture in one between the respective concrete slab and the Foil pocket arranged in the support layer is sprayed, characterized in that the concrete slab (10) is provided on its underside with a covering plastic plate (15), whose free surface of the foil pocket (16) fixed with its outer edges on the concrete slab (10) is loosely covered. 2. Railway superstructure according to claim 1, characterized in that the plastic plate (15) consists of Cell polyurethane elastomers.