WO2004018771A1 - Ballastless track and method for the production thereof - Google Patents

Abstract

The invention relates to a ballastless track such as the internationally known Rheda 2000 System, particularly on man-made structures such as bridges or the like, comprising ties (3), which are embedded in a concrete slab (2) placed on a supporting plate (1) and which were oriented transversal to the direction of travel before the slab was applied. The slab and the supporting plate are joined to one another by the supports, which consist of a tube (5) and which are preferably used during the orientation. Said tube is divided in the dividing plane between the supporting plate and the slab and the sections thereof are joined by a filling that permits an at least limited displacement of the slab on the supporting plate.

Description

Slab track and method of making it

The invention relates to a slab track such as e.g. the internationally known Rheda 2000 system, in particular on artificial structures, such as bridges or the like, with sleepers embedded in a concrete carriageway slab, which were aligned transversely to the direction of travel before the carriageway slab was applied, the carriageway slab and the support plate is connected to one another by the supports, preferably used in the alignment, consisting of a tube, and a method for producing such a slab track.

When installing a slab track with the truss method, the tube of the truss support is installed in the hydraulically bound base layer in such a way that it protrudes upwards into the road slab that is still to be applied. After attaching the crossbeams and the transverse alignment of the sleepers, the projecting upper pipe section is connected to the sleeper reinforcement (especially with two-block sleepers) and then the carriageway slab is concreted on, with the height of the concrete carriageway slab projecting above the upper end of the pipe. In this way, the carriageway slab and the substructure are firmly interlocked with one another and, for example, see DE 100 00 227 A1, and are not movable relative to one another, which does not damage the earth structure.

When constructing a Rheda 2000 fixed track system on artificial structures, such as bridges or the like, the concrete track slab with the embedded sleepers, ie with the entire track, must be movable to a certain extent with respect to the support slab, since yes Support plate as part of the artificial structure is subject to expansion and other movements that should not be passed on to the track. The classic truss installation method described above cannot therefore be applied to artificial structures.

BESTÄTIGBJWGSKOPII In addition, DE 199 13 204 A1 already provides a fixed carriageway with sleeper fastening members which are intended to hold the sleepers aligned laterally on the concrete base layer. The thresholds are not shed, as with the Rheda 2000 system. Nevertheless, there is a rigid connection between the sleepers and the concrete base plate, so that the arrangement of the anchoring bolts - which have no function with regard to the alignment of the sleepers according to the truss method - also result in a rigid dowelling of the sleepers with the concrete base layer.

The same applies analogously to an arrangement and a method for fastening a concrete sleeper on a concrete or asphalt support plate according to DE 195 14 005 A1. There, too, the sleepers are not cast into a cover layer, but are in turn rigidly connected to the concrete support plate by the anchoring boizen. The carriageway slab with the sleepers can therefore not make any movements relative to the underlying concrete slab, as is the case with art structures. Apart from the fact that they are not at all connected with a method for aligning the sleepers according to the trussing method, the arrangements according to the two above-mentioned documents are therefore also not suitable for art structures.

The invention is therefore based on the object of designing a slab track of the type mentioned in such a way that a limited elastic movement of the track slab to the substructure is ensured in spite of the dowelling.

To solve this problem it is provided according to the invention that the tube is divided in the parting plane of the support plate and the carriageway plate and the sections of which are connected by a fill that enables an at least limited displacement of the carriageway plate on the support plate.

According to a first embodiment of the invention, it can be provided that the sections are connected by a mandrel that has a rigid core encased in an elastomer jacket. Due to the inventive division of the tube of the truss support and the connection of the tube sections by a thin rigid core covered with an elastomer jacket, the extent of the elasticity of the jacket results in a limited mobility of the carriageway slab with respect to the substructure, this relatively low elastic mobility being completely in practice is sufficient to eliminate the disadvantages of a completely rigid connection.

To produce such a slab track, in a method in which the lower pipe section built into the supporting plate is first connected to the loosely placed upper pipe section by means of a long rigid mandrel to form a truss support, the threshold is adjusted in the transverse direction with detachably mounted trusses and then - if necessary after connecting the upper pipe section to the threshold reinforcement - the carriageway slab is concreted on, according to the invention it is provided that an assembly mandrel protruding from the carriageway slab is used as the mandrel, which is removed after the carriageway slab has hardened and replaced by the elastomer-coated mandrel and the non-binding insert recess of Roadway is closed.

In a second embodiment of the invention, in which the pipe is also divided in the parting plane of the support plate and the carriageway plate and the pipe sections are filled with resilient material, in particular PU foam, the production takes place in such a way that the pipe is in the parting plane of the Carrier plate and the carriageway plate is divided and that a rigid core rod is inserted into the pipe section concreted into the carrier plate and the upper pipe section is slipped thereon and that the core rod is connected to a handle that protrudes upwards from it before pouring it on, with the aid of which it can be adjusted After the road surface has hardened, it is pulled out and the pipe sections are then filled with the resilient material.

Due to the modification according to the invention of the previous truss installation method by dividing the tube serving as the truss support and the removal me of the core rod and, if necessary, its replacement by a soft foam, one avoids the previous rigid dowelling. The foaming of the pipe sections enables an elastic, flexible displacement of the carriageway slab on the support plate, whereby with larger displacements this elastic foaming could also be easily sheared off. To limit the relative movement of the carriageway slab on the support plate, other additional restrictions must therefore be provided, such as the elastically encased cams already mentioned, or the like.

The upper insert opening of the carriageway plate remaining above the recessed upper tube section and formed by the elongated core rod with the handle, preferably rigidly formed on it, can be poured out with bitumen or the like in a further development of the invention or closed with a, preferably unscrewable, stopper ,

Further advantages, features and details of the invention result from the following description of an exemplary embodiment and from the drawing. Show:

1 shows a cross section through a Rheda 2000 slab track system parallel to the threshold axis, the area of the dowel connection being shown broken away,

2 shows an enlarged view of the area with the truss support before concreting in, the threshold reinforcement having been omitted in this area for better clarity,

3 is an enlarged view of the area of the truss support / dowel connection after completion of the slab track,

4 - 17 a section parallel to a threshold in different production stages of the carriageway slab to be applied to a support plate in a second embodiment of the invention. In FIG. 1, which shows a first exemplary embodiment of the invention, 1 denotes a support plate, for example a hydraulically bound support layer HGT, or in particular the support plate of a bridge or the like, and 2 denotes the roadway plate consisting of concrete, into which the illustrated embodiment of a slab track system Rheda 2000 are embodied as two-block threshold 3 thresholds. In the exemplary embodiment shown, the two threshold blocks 3a and 3b of the two-block threshold 3 are connected to one another by the continuous reinforcement designed as a lattice girder 4. The alignment in the transverse direction of the carriageway, that is to say parallel to the longitudinal axis of the threshold 3, is carried out according to the so-called traverse method. For this purpose, a crossbeam is first formed, consisting of a tube 5 divided into two, the lower tube section 5a of which is embedded in the support plate 1 and anchored therein by means of a sealing compound 6. The upper pipe section 5b - the separating plane of the pipe sections lies exactly in the separating plane of the support plate and the carriageway plate 2 - is connected to the lower pipe section 5a by means of an assembly mandrel 7 with a handle 8, this assembly mandrel being inserted as far as the lower end of the lower pipe section 5a becomes.

Traverses are placed on the rigid pipe connection formed in this way, which cause the sleepers to be displaced transversely for the purpose of their adjustment, wherein the upper pipe section can, if necessary, be connected to the lattice girders 4 of the sleeper after adjustment has been carried out.

After adjusting the threshold - the height can be adjusted, for example, by spindles which are supported on the support plate 1 - the concrete for the carriageway plate 2 is applied up to the specified height 9, which lies above the upper end of the pipe section 5b. After the pavement plate 2 has hardened, the assembly mandrel 7 is pulled out and replaced by a mandrel 10 shown in FIG. 3, which consists of a thin rigid core 11 and an elastomer jacket 12. Within the framework of the elastic compressibility of this elastomer jacket 12, the upper tube section 5b can be displaced in relation to the lower raw section 5a and thus into this sem dimensions a limited elastic mobility of the carriageway slab 2 relative to the substructure, that is, the support plate 1, which is particularly necessary when building on art structures, such as bridges or the like.

The inserted from the recessed mandrel 10 upper insertion opening 13, which has been formed by the upward from the road plate 2 protruding mounting mandrel, is either poured out, as shown in Fig. 3, or closed by a, preferably unscrewable, plug.

The second embodiment of the invention will be described with reference to FIGS. 4-17.

4 shows a two-block concrete sleeper, which is placed with the aid of spindles 101 on a support plate 102, for example a support plate of an art structure, such as a bridge, with a lattice girder reinforcement 103, which connects the two individual blocks 104a and 104b of the two-block sleeper 104 to one another, and the bottom of these Blocks still protrude so that it is better concreted into the pavement slab. The spindles 101 are used for the vertical alignment of the sleepers, while the horizontal alignment, that is, the alignment parallel to the longitudinal axis of the sleeper, is to be achieved by regulating crossbars. At 105, preferably removable side formwork for the later grouting of the carriageway slab can be seen.

In order to be able to carry out the threshold regulation according to the truss method, an opening 106 for the truss support tube is first made in the support plate 102 (FIG. 5). The lower tube section 107a of the crossbeam support tube 107 is inserted into this recess 106 (FIG. 6), into which the core rod 108 is then inserted, which protrudes upward above the support plate (FIG. 7).

After the lower tube section 107a has been cast in the recess 106 in the support plate 102 (FIG. 8), a soft intermediate ring is placed on the core rod 108 118, e.g. B. made of polystyrene or the like., And then the upper tube section 107b of the cross tube is pushed on (FIGS. 9 and 10).

After the traverse support has thus been created, the regulating crossbar 109 is placed (see FIG. 11) and the threshold is aligned above the support plate 102, by horizontal displacement along the double arrows 110 on the one hand with the help of the regulating crossbar and by adjusting the height of the spindles 101 in accordance with the double arrows 111. After the regulation has taken place, a, preferably U-shaped, tab 112, which is pushed from the side over the upper tube section 107b of the crossbar support tube 107, is welded to the grid reinforcement 103 in order to fix the set transverse position of the track grate (FIG. 12).

After removing the regulation crossbar 109, a handle 114 is screwed onto the core rod 108, which is provided with a tapered threaded section 113 at the upper end (FIG. 13), and then the roadway concrete is filled in to form the roadway plate 117 (FIG. 14). After filling and subsequent compaction and subsequent compaction of the roadway concrete, the core rod 108 is pulled out using the pull-out handle 114 - if necessary, the core rod 108 can be extended so that it protrudes above the roadway plate, so that only the actual cross arm 115 of the handle has to be attached subsequently - Removed, so that a decoupling of the roadway plate 117 from the underlying support plate 102 is achieved. The truss support tube, consisting of the lower pipe section 107a and the upper pipe section 107b, is finally (FIG. 16) filled with PU foam or another flexible material (FIG. 17) and then the insert opening 116 remaining thereafter is finally filled with a suitable one Material, such as bitumen, backfilled or closed by a, preferably unscrewable, stopper.

The present description of the method for the construction of a Rheda 2000 slab track system on artificial structures, in particular bridges, using the so-called traverse method only includes the method of installation, which ensures complete decoupling of the track slab from the support slab. A Movable fixation of the carriageway slab, as mentioned at the beginning, is not included, since it is basically already known in the prior art and these known solutions can also be used here.

Claims

claims 1.Solid track such as the internationally known Rheda 2000 system, in particular on artificial structures, such as bridges or the like, with sleepers embedded in a concrete carriageway slab, which were aligned transversely to the direction of travel before the carriageway slab was applied, the carriageway slab and the supporting plate by the supports, preferably used in the alignment, consisting of a tube, are connected to one another, characterized in that the tube is divided in the parting plane of the support plate and the carriageway slab and the sections of which are connected by a filling, which indicates an at least limited displacement of the carriageway slab of the support plate. 2. Fixed carriageway according to claim 1, characterized in that the sections are connected by a mandrel which has a rigid core (11) encased by an elastomer jacket (12). 3. Solid carriageway according to claim 2, characterized in that the upper insert opening (13) of the carriageway plate (2), which is left free from the sunk mandrel (10), is poured out. 4. Solid carriageway according to claim 2, characterized in that the upper insert opening (13) of the carriageway plate (2), which is left free from the recessed mandrel (10), is closed with a plug, which can preferably be unscrewed. 5. Solid carriageway according to claim 1, characterized in that the tube is divided in the parting plane of the support plate and the carriageway plate, and that the pipe sections are filled with flexible material, in particular PU foam. A method for producing a slab track according to one of claims 2 to 4, wherein the lower pipe section built into the support plate is first connected to the loosely placed upper pipe section by means of a long rigid mandrel to form a truss support, the threshold with releasably attached trusses in Adjusted transverse direction and then - if necessary after connecting the upper pipe section with the threshold reinforcement - the carriageway slab is concreted, characterized in that an assembly mandrel protruding from the carriageway slab is used as the mandrel, which is removed after the carriageway slab has hardened and replaced by the elastomer-coated mandrel and the free recess in the carriageway slab is closed. A method for producing a slab track according to claim 5, characterized in that the tube is divided in the parting plane of the support plate and the carriageway plate and that a rigid core rod is inserted into the pipe section concreted in the support plate and the upper tube section is pushed thereon and that the core rod before pouring on the track slab, it is connected with a handle that protrudes upwards from it, with the aid of which it is pulled out after the track slab has hardened and that the pipe sections are then filled with the flexible material. A method according to claim 7, characterized by the use of an extended core rod with a handle crossbar. A method according to claim 7 or 8, characterized in that the upper insert opening of the carriageway slab remaining above the recessed upper tube section is poured out with bitumen or the like. A method according to claim 7 or 8, characterized in that the upper remaining above the recessed upper tube section Insert opening of the carriageway slab is closed with a, preferably unscrewable, stopper.