KR100692428B1 - Ballastless track and method for the production thereof - Google Patents

Abstract

The present invention is known internationally as the Leda 2000 system, in particular having sleepers (3) formed on a bridge or similar artificial structure and fixed in a concrete track plate mounted on a subgrade, the sleepers being the track Aligned transversely with respect to the direction of movement before mounting of the plate, the track plate 2 and the subgrade 1 are preferably used for alignment and are connected to each other by supports made of pipes 5, the pipes being Divided in the plane of engagement between the roadbed and the track plate, the parts are connected by a pillar, so that a fixed track is provided that allows at least limited displacement of the track plate on the roadbed.

LEDA 2000 system, bridges, concrete track plates, sleepers, fillers, fixed tracks

Description

Stationary track and manufacturing method thereof {BALLASTLESS TRACK AND METHOD FOR THE PRODUCTION THEREOF}

The present invention relates to a fixed carriageway, for example as known internationally as the Rheda 2000 system, in particular mounted on a bridge or similar artificial structure and on a roadbed (support plate). Equipped with sleepers which are mounted and fixed in a concrete railway plate (slab), wherein the sleepers are aligned transverse to the orbital direction prior to mounting of the track plate, the track plate and the subgrade Connected by supports, the support preferably relates to a stationary track which is used for alignment and consists of a pipe and a method of manufacturing the stationary track.

In mounting the fixed track in a tie-bar manner, the pipe of the tie-bar support is mounted in a support layer which is hardened by water, in which way it projects upwards into the track plate to be mounted. After mounting of the tie-bars and the transverse alignment of the sleepers, the projecting upper pipe portion is connected to a sleeper reinforcement (particularly in the case of sleepers consisting of two blocks), and then concrete is covered on the track plate, The concrete covered track plate height protrudes above the top of the pipe. The track plate and the substructure are thus rigidly fixed without relative movement to each other, see for example DE 100 00 227 A1, which does not cause any problems when built on the ground.

When building a fixed track system of the LEDA 2000 on a bridge or similar man-made structure, the fixed sleepers, ie a concrete track plate with a full track, are movable to some extent with respect to the subgrade. This is because the roadbed as part of the artificial structure is exposed to expansion and other movements that are not intended to be applied on the track. Accordingly, the above-mentioned conventional tie-bar fixing method cannot be used on artificial structures.

In DE 199 13 204 A1, there is already shown a structure in which sleeper fixing members have already been provided on overlapping fixed tracks, which are intended to fix laterally aligned sleepers on a concrete support layer. Casting of sleepers does not occur as in the Reda 2000 system. However, there is a solid connection between the sleepers and the concrete subgrade, so that the structure of these anchor bolts does not play any part in the alignment of the sleepers according to the tie-bar method, but the tight coupling of the sleepers to the concrete support layer ( doweling).

Thus, the same approach applies to structures and methods for fixing concrete sleepers on concrete or asphalt subgrades according to DE 195 14 005 A1. Also here, the sleepers are not cast in the cover layer, but are again firmly connected to the concrete subgrade by anchor bolts. Thus, the track plate with the sleepers cannot achieve relative movement with respect to the underlying concrete subgrade, as in the case of artificial structures. Apart from the fact that the structures presented in the two texts mentioned above have nothing to do with how they align the sleepers in a tie-bar fashion, they are not suitable for artificial structures.

      It is an object of the present invention to form a fixed track in the manner mentioned in the introduction, in which the limited elastic movement of the track plate relative to the underlying structure is ensured in spite of the firm coupling.

In order to achieve this, according to the invention, a pipe is divided in the plane joining between the subgrade and the track plate, the parts of which are connected by a filler so that at least limited displacement of the track plate on the subgrade. To allow.

According to a first embodiment of the invention, the parts are connected by a pin, which may be provided with a rigid core surrounded by an elastomeric material.

According to the invention, the limited movement of the track plate relative to the substructure within the elastic range of the casing is achieved by the splitting of the pipe of the tie-bar support and the connection of the pipe parts by a thin and rigid core surrounded by elastomeric material. This relatively small elastic movement is obtained, which is in fact able to completely eliminate the disadvantage in the completely fixed connection structure.

In order to produce such a fixed track, in one method, the pipe part fixed in the subgrade is first connected to the upper pipe part loosely superimposed by a long rigid pin to form a tie-bar support, and the sleeper is detachably overlapped. And laterally controlled as the tie-bars, and after the selective connection of the upper pipe cross section with the sleeper reinforcement, the track plate is cast thereon and, according to the invention, protrudes from the track plate as one pin. Mounting pins are used, which are removed after curing of the track plate and replaced by pins surrounded by elastomer, the remaining inserts of the track being sealed.

In a second embodiment of the present invention, similarly to the above, the pipe is divided in the connecting plane of the subgrade and the track plate, and the pipe parts are filled with an elastic material, in particular a polyurethane foam, and the process is as follows. The pipe is divided in the connecting plane between the subgrade and the track plate, and a rigid core rod is inserted into the concrete embedded pipe portion into the subgrade, and an upper pipe portion is mounted thereon, and the core rod is mounted on the track Before the plate is cast, it is connected to the protruding handle, by which the core rod is removed after hardening of the track plate, and the pipe parts are filled with elastic material.

According to the invention, according to a modification of the tie-bar fixing method used so far, it is possible to divide the pipe acting as a tie-bar, remove the core rod, and optionally replace it with a soft foam, thereby ensuring Doweling is avoided. Filling the pipe parts with foam allows for elastic displacement of the track plate on the subgrade, and in the case of relatively large displacements, this elastic foam filling can be easily sheared. In order to limit the relative movement of the track plate on the subgrade, other additional limiting means must therefore be provided, for example elastically surrounded rivets or similar to those mentioned above.

The upper insert of the track plate, which is formed by a core rod remaining over the concave upper pipe portion and extending with the handle, is preferably formed on the core rod, in another embodiment of the present invention, a bitumen Or the like, or sealed with a plug that can be preferably removed by unscrewing.

More detailed advantages, features and details of the present invention will be apparent from the embodiments described below and the reference drawings.

1 is a cross-sectional view of a fixed line cross section of a Leda 2000 parallel to the sleeper axis, with the rigid dowel connection area open;

FIG. 2 is an enlarged view of an area with tie-bar supports before being embedded into concrete, a cross-sectional view showing the state where the sleeper reinforcement has been removed from this area for clarity;

3 is an enlarged cross-sectional view showing the area of the tie-bar support / dowel connection after completion of the stationary track;

4 to 17 are cross-sectional views parallel to the sleepers at various stages of assembly of the track plate mounted on the subgrade in a second embodiment of the present invention.

In Fig. 1, a first embodiment of the invention is shown and reference numeral 1 denotes a roadbed, ie a roadbed of a hydraulically bonded support layer, or in particular a bridge or similar structure, Reference numeral 2 denotes a concrete track plate, wherein the sleepers formed in this embodiment are shown and fixed as dual block sleepers 3 composed of two blocks of the fixed Redda 2000 system track. In the embodiment shown, the two sleeper blocks 3a and 3b of the sleeper 3 consisting of two blocks are connected to each other by a continuous reinforcement formed as a support grid 4. The transverse alignment of the track, ie parallel to the longitudinal axis of the sleeper 3, is achieved by what is known as a tie-bar method. To achieve this, a tie-bar is first formed, which consists of a pipe 5 and is divided into two so that the lower pipe part 5a is inserted into the subgrade 1 and fixed therein by the casting mixture 6. . The upper pipe part 5b is connected to the lower pipe part 5a by means of a mounting pin 7 having a handle 8, in which the connection plane of the pipe parts is precisely located in the connection plane of the roadbed and the track plate 2. And the mounting pin is inserted deeply to the bottom end of the lower pipe part 5a.

The tie-bars are formed on a rigid pipe connection and make a lateral displacement of the sleepers to achieve their adjustment, in which case the upper pipe part can be connected to the support grid 4 of the sleeper after adjustment by plates.

The vertical setting / adjustment of the sleepers is for example made by a spindle supported by the subgrade 1. After adjustment of the sleepers, as shown in FIG. 2, the concrete is cast to the level indicated by reference 9 located above the upper end of the pipe part 5b with respect to the track plate 2. After curing of the track plate 2, the assembly pins 7 are removed and replaced by pins 10 as shown in FIG. 3, which pins are made of a thin rigid core 11 and an elastomer casing 12. ) Within the range of the elastic compressive performance of the elastomeric material 12, a limited displacement of the upper pipe portion 5b with respect to the lower pipe portion 5a is obtained, and thus the track plate for the lower structure, i.e. the subgrade 1 Limited elastic mobility in this range of 2) is obtained, which is particularly necessary when assembled to artificial structures of bridges or the like.

The upper insertion hole 13 left by the countersunk pin 10 is formed at the top by the assembling pin protruding from the track plate 2, and as shown in FIG. It is preferably sealed as a plug that can be unscrewed.

A second embodiment of the present invention will be described with reference to FIGS. 4 to 17.

In FIG. 4, concrete sleepers are shown consisting of two blocks fixed by the spindle 101 on the subgrade 102, ie the subgrade of an artificial structure, such as a bridge, has a support grid reinforcement 103. It connects two separate sleeper blocks 104a and 104b of the sleeper 104 consisting of two blocks, protruding from the bottom from these blocks and they are more concretely embedded in the track plate. The spindle 101 is for vertically aligning the sleepers, the horizontal alignment, ie alignment in the direction parallel to the longitudinal axis of the sleeper, by means of adjusting tie-bars. At 105, preferably removable side shells are shown for subsequent casting of the track plate.

In order to be able to adjust the sleepers according to the tie-bar method, first (see FIG. 5), an opening 165 for the tie-bar support pipe is formed in the subgrade 102. Into this opening 106, the lower pipe portion 107a of the tie-bar support pipe 107 is inserted (see FIG. 6), into which the core rod 108 is inserted, which is from the top to the bedside. It protrudes (see FIG. 7).

After casting the lower pipe portion 107a into this opening 106 of the subgrade 102 (see FIG. 8), the flexible intermediate ring 118, ie, made of something like styropor (polystyrene), etc. It is mounted on the core rod 108, and then the upper pipe portion 107b of the tie-bar pipe is mounted (see FIGS. 9 and 10).

Once the tie-bar support is obtained, the adjusting tie-bar 109 (see FIG. 11) is mounted and the sleepers are aligned through the subgrade 102, which on the one hand is double arrowed by the adjusting tie-bar ( By the horizontal displacement in the direction of 110 and the vertical adjustment of the spindle 101 according to the double arrow 111. Once the adjustment is completed, a preferably U-shaped fishplate 112 pushed laterally over the upper pipe portion 107b of the tie-bar support pipe 107 is attached to the grid reinforcement 103. It is welded so that the lateral position of the line grate is fixed and set (see Fig. 12).

After removal of the adjustment tie-bar 109, the handle 114 is screwed onto the core rod 108 provided with the upper end and having the tapered threaded portion 113 (see FIG. 13), and then the track. Concrete is poured to form the track plate 117 (see FIG. 14). After casting and subsequent sealing and resealing of the track concrete, the core rod 108 is removed by a thread release handle 114 (the core rod can be selectively extended so that it only projects by projecting onto the track plate). Only the actual transverse arm 115 of the handle is subsequently mounted), thus separating the track plate 117 from the lower subgrade 102. The tie-bar support pipe consisting of the lower pipe portion 107a and the upper pipe portion 107b (see FIG. 16) is then filled with polyurethane foam or other elastic material (see FIG. 17), and then Finally the insertion opening 116 remaining above is filled with a suitable material, for example bitumen or the like, or sealed as a plug which is preferably removable by unscrewing.

The following description of a method for constructing a fixed Leda 2000 track system by means known as a tie-bar method on an artificial structure such as a bridge includes only a mounting mode that ensures complete separation of the track plate from the roadbed. Movable fastening of the track plate as mentioned in the introduction is not included because it is already known in the art and such known solutions do not apply in this case.

The present invention forms a fixed track, wherein the limited restoring force movement of the track plate relative to the underlying structure is ensured despite its rigid coupling.

Claims (10)

Concrete sleepers formed on a bridge or similar artificial structure and secured in a track plate mounted on the subgrade, the sleepers being laterally aligned with respect to the track direction prior to mounting of the track plate, And roadbeds are used for alignment and connected to each other by piped supports, in stationary tracks known internationally as the LEDA 2000 system. And the pipe is divided in the plane of engagement between the subgrade and the track plate, the parts of which are connected by a filler, to allow for limited displacement of the track plate on the subgrade. 2. The stationary track according to claim 1, wherein the parts of the pipe are connected by fins, the fins having a rigid core (11) surrounded by an elastomeric casing (12). 3. The stationary track according to claim 2, wherein the upper insert (13) left by the countersunk pin (10) in the track plate (2) is filled. 3. The stationary track according to claim 2, characterized in that the upper insert (13) left by the countersunk pin (10) in the track plate (2) is sealed with a plug that is removable by unscrewing. The stationary track of claim 1, wherein the parts of the pipe are filled with elastic material, in particular polyurethane foam. The method of manufacturing the stationary track according to any one of claims 2 to 4, wherein the lower pipe part fixed in the subgrade is first connected to the upper pipe part loosely overlapped by a long, rigid pin to form a tie-bar support. And the sleeper is adjusted transversely as detachably overlapped tie-bars, and then, after selectively connecting the upper pipe portion to the sleeper reinforcement, the production of a stationary track in which the track plate is cast thereon. In the method, As a pin, a mounting pin protruding from the track plate is used, the pin being removed after hardening of the track plate and replaced by a pin surrounded by an elastomer, and the remaining insert of the track is sealed. Manufacturing method. 7. The pipe according to claim 6, wherein the pipe is divided in the joining plane between the subgrade and the track plate, a rigid core rod is inserted into the subbed concrete portion of the subgrade, and the upper pipe portion is mounted thereon, and The core rod is connected to a handle protruding from the track plate before the track plate is cast, by which the core rod is removed after curing of the vehicle plate, and the pipe parts are filled with elastic materials. . 8. A method according to claim 7, wherein an extended core rod with a removable handle cross bar is used. 9. The stationary track of claim 7 or 8, wherein the upper pipe is recessed and the upper insert of the track plate left over the recessed upper pipe portion is filled with bitumen or the like. Manufacturing method. 10. The stationary track according to claim 7 or 8, wherein the upper pipe is recessed and the upper insert of the track plate left over the recessed upper pipe portion is sealed as a detachable plug by unscrewing. Manufacturing method.

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