EP0635603A1 - Method and device for constructing a ballastless superstructure - Google Patents

Abstract

An arrangement for filling the sleeper interspaces between successive sleepers (8) of a track skeleton and between the sleepers and a continuous concrete slab (TRG) deposited on a formation in the case of ballastless track construction, comprises a track-bound concrete pump (14) at the rear end of the arrangement in the working direction thereof, a concrete finisher (4) for filling concrete into the sleeper interspaces at the front end of the arrangement and a pumping line (16) between concrete pump and concrete finisher, which is supported on track-bound line carriers (18) and the length of which is adapted to the working speed of the concrete finisher in such a way that the concrete pump (14), moving forwards essentially in the same manner as the concrete finisher (4), always travels on sufficiently set filling concrete. <IMAGE>

Description

The invention relates to an arrangement for pouring out the sleeper gaps between successive sleepers of a track grate and between the sleepers and a continuous concrete slab applied to a subgrade in ballastless track construction.

A concrete paver provided for this purpose is known from EP 379 148 A2. This can be moved on the two laterally raised edge beams of the concrete slab with the help of correspondingly driven crawler tracks, so that the overall weight of the concrete paver does not have to be taken too seriously, which would be the case if, as was also possible in principle, the paver on the tracks of the Track rust would drive. After it has been adjusted, the track grating is only provisionally fixed and therefore less resilient. The delivery of the concrete is problematic with the known arrangement. Delivery from the front or rear via track-running transport vehicles is excluded due to the low load-bearing capacity of the track grate. In addition, the leading track adjustment device, as described for example in EP 379 148 A2, also interferes. Delivery vehicles delivering from the front must therefore stop at the head end of the track grate, which is generally too far away from the concrete paver. Lateral transport is problematic or even impossible, especially in tunnel construction lines or on single-track lines. The corresponding vehicle would also have to drive on the formation, which could be damaged under certain circumstances.

The invention is based on the technical problem, such as a concrete paver for pouring out threshold gaps in ballastless track construction in a simple manner can be supplied with concrete in unfavorable conditions.

To solve the problem, an arrangement is proposed according to the invention comprising a track-running concrete pump at the rear end of the arrangement in the working direction of the arrangement, a concrete paver at the front end of the arrangement for filling concrete into the threshold spaces and a pump line between the concrete pump and the concrete paver, which is located on track-running line supports supports and the length of which is adapted to the working speed of the concrete paver in such a way that the concrete pump which moves forward essentially in the same manner as the concrete paver always runs on sufficiently hardened pouring concrete.

According to the invention, the concrete pump is already in an area of sufficiently hardened pouring concrete, so that both the concrete pump can be moved on the rails without any problems and the track-delivering concrete delivery units. Such units can be formed by low-floor railway panel wagons on which concrete delivery vehicles can drive. Such a combination is known for example from DE 39 25 344 A1. The track-carrying line carriers can be designed to be sufficiently lightweight, since they only have to carry the pump line. The cable carriers can therefore easily run on the poured track grate even before the pouring concrete has hardened. Due to the use of the concrete pump, the concrete paver can always be provided with the amount of concrete currently required, so that it is not necessary to provide the concrete paver with one or more concrete buffer stores of greater capacity, as is the case with the known concrete paver according to EP 379 148 A2 is the case. Accordingly, the concrete paver saves weight, so that under certain circumstances, too can drive directly on the track grate. In any case, excessive stress on the respective subsurface is avoided.

In a further development of the invention it is proposed that in the continuous operation of the arrangement at a working speed from the concrete line, a distance between the concrete paver and the concrete pump is bridged, which essentially corresponds to the product of the working speed and a curing time.

It is further proposed that in the case of a discontinuous mode of operation of the arrangement with a working speed during a working phase with a working period and a resting phase with a rest period, a distance between the concrete paver and the concrete pump is bridged which essentially corresponds to the product of the working speed and a hardening period, if the working time is at least equal to the curing time and which essentially corresponds to the product of the working speed and the difference between the curing time and the rest time, if the working time is less than the curing time.

It has been found to be favorable, in particular with a daily line of approximately 500 m, that the distance between the concrete paver and the concrete pump bridged by the pump line is greater than 100 m, preferably greater than 200 m and, ideally, about 300 m.

There is no need for a separate travel drive unit for the concrete pump if, according to a further development of the invention, only the concrete paver is provided with a travel drive unit and that the concrete paver takes the concrete pump with it via the line supports.

It is particularly preferably provided that at least some of the coupling connections between the concrete paver, the pipe supports and the concrete pump are designed with coupling play in the direction of travel. Due to this coupling play, there is a kind of "accordion effect", which makes it much easier to start at the beginning of a manufacturing phase. After the end of the previous production phase, the advancing cycle manufacturer suddenly stops, whereupon the attached cable carriers and the concrete pump run up according to the respective coupling play. At the subsequent start, the line carriers closest to the concrete manufacturer and then the line carriers and the concrete pump further away are taken along and accelerated, so that a simultaneous initial acceleration of all elements of the chain is avoided.

So that the pump line can easily understand the concertina movement, it is proposed that the pump line be at least partially zigzagged for length compensation on the line carrier.

Lightweight yet sufficiently stable light carriers are obtained if they comprise light metal lattice frames provided with track bogies.

To reduce the construction effort, it is also proposed that the line carriers comprise further light metal lattice frames which can be suspended between successive light metal lattice frames provided with track running gear. In this way, the track bogies can be saved with every second light metal lattice frame.

In order to ensure continuous delivery to the concrete manufacturer, it is proposed that the concrete pump be provided with a concrete buffer store.

The invention also relates to a method for producing a ballastless geis superstructure, wherein a continuous concrete slab is applied to the formation, the track yoke is supported on the concrete slab and the threshold gap between successive sleepers and between the sleepers and the concrete slab is poured out by means of a concrete paver, which method is characterized in that is that the concrete paver is connected to a concrete pump by means of a pump line, the length of the pump line being adapted to the working speed of the concrete paver in such a way that the concrete pump which operates in essentially the same way with the concrete paver always runs on sufficiently hardened pouring concrete.

The invention is explained below using preferred exemplary embodiments with reference to the drawing.

Fig. 1:

eine seitliche Gesamtansicht der Anordnung zum Ausgießen der Schwellenzwischenräume und zwar in Fig. 1 oben den Bereich des Betonfertigers am vorderen Ende der Anordnung und in Fig. 1 unten den Bereich der Betonpumpe am hinteren Ende;

Fig. 2:

eine stark vereinfachte Draufsicht auf einen Leitungsträger;

Fig. 3

einen Detailschnitt nach Linie III - III in Fig. 2; und

Fig. 4

einen Detailschnitt nach Linie IV - IV in Fig. 2.

It shows:

Fig. 1:

a general side view of the arrangement for pouring the threshold spaces, namely in Figure 1 above the area of the concrete paver at the front end of the arrangement and in Figure 1 below the area of the concrete pump at the rear end.

Fig. 2:

a greatly simplified top view of a cable carrier;

Fig. 3

a detailed section along line III - III in Fig. 2; and

Fig. 4

a detail section along line IV - IV in Fig. 2nd

In the case of ballastless track construction (type RHEDA), the sleepers are not embedded in a ballast bed, but placed on a continuous concrete slab and with this is connected to concrete by pouring. The sequence is followed by first installing an anti-freeze layer FSS and then a hydraulically bound base layer HGT. Conventional base course pavers are used here as well as rollers or roller trains for post-compaction. The next phase consists in the production of a TRG concrete slab with reinforcement. According to EP 0 379 148 A2, this concrete slab, designated TRG in FIG. 1, can be provided with laterally raised concrete edge beams. In the exemplary embodiment shown in FIG. 1, however, this is not the case. Here, the concrete slab TRG is narrower than the hydraulically bound base layer HGT, so that an edge strip 2 of the hydraulically bound base layer HGT is formed on both sides of the concrete slab TRG, which as such, at least from suitable undercarriages such as crawler tracks, not too heavy units, namely from a concrete paver 4 is passable. In the exemplary embodiment shown, the concrete slab TRG is also provided with two ribs 6 onto which the sleepers 8 can be placed, either individually or preassembled on a corresponding track grating 10 consisting of the sleepers 8 and the two rails 12.

It is important that the respective track grate is adjusted exactly in the required elevation, lateral position and inclination before the final fixation of the track grate is carried out by pouring out the threshold spaces by the concrete paver 4. This adjustment can be carried out by a track yoke adjustment device, as is also described in EP 0 379 148 A2. The provisional fixation in the adjustment position can be carried out with the help of screw spindles or wedges or by fast-hardening special concrete to fix the sleepers on the TRG concrete slab.

The arrangement to be described below for pouring the threshold gaps consists of the already mentioned concrete paver 4 at the front end in the working direction A of the arrangement, a track-running concrete pump 14 at the rear end and a pump line 16 between the concrete pump 14 and the concrete paver 4, which are located on track-running line supports 18 supports. The effective length of the pump line 16 is now adapted to the working speed of the concrete paver 4 in such a way that the concrete pump 14 drawn in the exemplary embodiment of concrete paver 4 via the line carrier 18 always runs on sufficiently hardened pouring concrete. The concrete pump 14 in turn receives its concrete via conventional concrete mixing vehicles 20. Due to the already sufficiently hardened pouring concrete, these can be brought up on platform platforms with track access.

According to DE 39 25 344 A1, platform carriages 22 can be used for this purpose, in which the required drive torque is derived from the set of wheels of the drive axle of the mixer vehicle 20.

In order to enable continuous operation even when the mixer vehicle 20 is currently being changed, the concrete pump is provided with a concrete buffer store 23.

The structure of the concrete paver 4 essentially corresponds to that of the concrete paver known from EP 0 379 148 A2. The content of this publication is part of the disclosure of this application.

A frame 24 can be seen, which is supported by a driven crawler chassis 26 at the front end and by a simple double wheel chassis 28 in the area of the rear end on the ground. In contrast to the aforementioned European laid-open publication, the undercarriages 26 and 28 drive on said edge strip 2 of the hydraulically bound base layer HGT on the side of the concrete base plate TRG.

A main drive unit 30 is located at the front end of the concrete paver 4. A concrete buffer tank 32 follows, into which the pump line 16 opens from above. Since a continuous delivery of concrete is ensured due to the arrangement according to the invention, the required buffer volume can be comparatively small. This also leads to a noticeable reduction in the total weight of the concrete paver, which for this reason can also run smoothly on the hydraulically bound base layer HGT. Accordingly, the concrete slab TRG can be made narrower and possibly less solid, so that its manufacturing costs are reduced. The concrete edge strips that are raised on the side can also be omitted.

In Fig. 1 above you can also see a fill box 34 connected to the container 32 for feeding the concrete into the threshold spaces. If necessary, this filler box 34 can be attached to the frame 24 in a height-adjustable manner, the filler box reaching into the threshold gap in the lower end position and being lifted out of the threshold gap in the upper end position - this is again described in detail in the aforementioned European publication as well as vibrating bottles 36 inside the vibrating boxes 34 which improve the concrete distribution between the sleepers and between the sleepers and the concrete slab TRG.

In order to improve the working speed, two or more filling boxes 34 arranged one behind the other in working direction A can also be used, which are then cyclically lowered between the sleepers at the same time and raised again out of the sleepers area.

At the rear end of the concrete paver 4 there is a pressure plate arrangement 40 which reliably closes the holes formed when the vibrating bottles 36 are pulled up and, moreover, for a predetermined cross-sectional profile element (gable roof-like in the case of straight route or inclined in the case of curved sections) in order to ensure that surface water flows away. This printing plate arrangement 40 is also described in detail in the European published application. The two-part pressure plate arrangement 40 currently raised above the thresholds can be seen in FIG. 1 above, as well as a lever mechanism 44 for raising and lowering the pressure plate 42 and a power take-off unit 46 above the frame 24. This also drives an unbalance drive (not shown) connected to the pressure plate arrangement 42 to get a smooth concrete surface.

As already mentioned, the effective length of the pump line 16 is so great that it is ensured that the concrete pump 14 is already running on sufficiently hardened pouring concrete. In the case of continuous production around the clock, the minimum distance to be bridged by the concrete line 16 between the concrete paver 4 and the concrete pump 14 results in a length value which corresponds to the product of the working speed v and the curing time tA. With a working speed v of, for example, 25 m / h and a curing time tA of, for example, 12 h, there is a minimum distance of 12 * 25 m = 300 m.

In the case of discontinuous working with alternating successive working phases with a working time t1 and resting phases with a resting time t2, a distinction must be made as to whether the working time t1 is at least equal to the curing time tA or not. In the former case, the product v · tA again results for the distance.

. Bei einer Arbeitsgeschwindigkeit v von beispielsweise 25 m/h, einer Arbeitsdauer t1 von beispielsweise 10 h, einer Ruhedauer t2 von beispielsweise 2 h sowie einer Aushärtedauer tA von beispielsweise 12 h erhält man somit einen Mindestabstand zwischen Betonfertiger 4 und Betonpumpe 14 von (12 - 2) · 25m = 250 m.If, on the other hand, the working time t1 is shorter than the curing time tA, the distance is the product $\text{v · (tA - t2)}$

. With a working speed v of, for example, 25 m / h, a working time t1 of, for example, 10 h, a rest period t2 of, for example, 2 h and a curing time tA of, for example, 12 h, a minimum distance between the concrete paver 4 and the concrete pump 14 of (12-2 ) 25m = 250m.

A distance of 300 m has proven to be a favorable value.

A correspondingly long concrete line 16 can no longer be drawn on the floor. The concrete line 18 is therefore placed on the already mentioned line supports 18, which also establish the mechanical connection between the driven concrete paver 4 and the non-driven concrete pump 14. A lightweight construction is used so that the cable carriers 18 can travel directly on the rails 12 of the track grating 10, which is only provisionally fixed in the adjustment position.

2-4 show, in a highly simplified manner, an exemplary embodiment of such a line carrier 18. It comprises a horizontal light metal grid frame 50 which is supported on the rails 12 by means of corresponding track bogies. In Fig. 1, relatively complex, turntable-like double wheel drives 52 are used for this purpose. In the exemplary embodiment according to FIGS. 2-4, on the other hand, for the sake of simplicity, each undercarriage 52 'consists of a single track wheel 54 with an axis 55, which is connected to the lattice frame 18 via an axle bolt support 56. In Fig. 2 only the track bogies 52 'at the left end of the lattice frame 18 are indicated; Axes 55 are drawn from the right track bogies.

The length L of each line carrier 18 is about 10 m, so that you have to be bridged at a distance of 300 m accordingly 30 copies needed. In order to further reduce the manufacturing outlay and the weight on the rails 12, one can also proceed in such a way that a line carrier 18 'in the form of a simple light metal lattice frame 50' is hooked between two successive, but approximately 10 m apart track-running line carriers 18, however without track undercarriages. As shown in FIG. 3 in particular, the frame 50 'is supported on extension pieces 60 which are welded to the underside of the lattice frame 50, for example in the area of the respective frame corners as a continuation of the lateral frame bars 50a.

The coupling between the track-running cable carriers 18 or between the cable carriers 18 and 18 'takes place in such a way that on the one hand a small amount of pivoting movement around a vertical coupling axis 66 is possible, and on the other hand the coupling device has a certain coupling play in the direction of travel (= working direction A) ensure to facilitate starting the arrangement. Such a coupling connection is roughly schematically indicated in FIGS. 2 and 4 and designated 70. It is formed by a vertically downwardly projecting coupling bolt 72 on one of the two parts to be connected, for example on the lattice frame 18 ', which engages in a coupling slot 74 on the other part (here on the cable carrier 18). The elongated hole 74 is machined into a coupling plate 76 which is welded to one of the two ends of the lattice frame and which runs in the longitudinal center plane. The elongated hole length LL exceeds the diameter of the coupling bolt 72 by about 5 cm, so that there is a corresponding coupling play. The coupling pin 72 also defines the axis 66 and allows the desired pivotal movement of the frames 50, 50 'relative to one another to accommodate Allow curve sections. It should be emphasized that the coupling connection 70 can also be designed differently.

The coupling play therefore makes it easier to start up the entire arrangement because, at the end of the last working phase, the concrete paver 4 brakes relatively quickly, whereupon the line supports 18, 18 'previously pulled by it, together with the concrete pump 14, collide with one another in accordance with the coupling play. When starting up again, the coupling play between the concrete paver and the next line carrier 18 is first eliminated, then this line carrier is taken along, etc.

So that the pump line 16 also easily participates in this concertina-like movement, it is designed, at least in some areas, with a corresponding length compensation play. For this purpose, the pump line 16 according to FIG. 2 can be placed on the lattice frame 50 in a wave-like or zigzag fashion, as in FIGS. 2 and 4 by a - ^. - ^. - Outline of the pump line 16 is indicated. In order to prevent the pump line 16 from sliding down, it can be guided in a fork-like manner. 2 and 4 each show two relatively closely adjacent guide rods 80 which project vertically upward from the lattice frame 50 and which are also provided in a corresponding position on the adjoining lattice frame 18 '. The distance is dimensioned sufficiently so that the concrete line 16 can move back and forth between the rods 80 for length compensation essentially in the longitudinal direction of the hose (double arrows B).

In the area of the middle of the length two further guide rods 82 are provided, which, however, are at a significantly greater distance from one another in order also to permit a transverse movement of the hose line 16 (arrows C and D), so that the hose line 16 in this area for length compensation easily becomes stronger and less can bend badly.

After completion of a manufacturing phase, the concrete line 16 is cleaned, in particular in the form of a hose, in that a rubber ball, which essentially corresponds to the hose cross section, is pressed through the hose by compressed air.

Claims (12)

Arrangement for pouring the sleeper gaps between successive sleepers (8) of a track grate (10) and between the sleepers (8) and a continuous concrete slab (TRG) applied to a subgrade in the case of ballastless track construction, comprising: a track-running concrete pump (14) at the rear end of the arrangement in the working direction (A) of the arrangement, - A concrete paver (4) for pouring concrete into the threshold spaces at the front end of the arrangement and - A pump line (16) between the concrete pump (14) and the concrete paver (4), which is supported on track-running cable carriers (18) and whose length is adapted to the working speed of the concrete paver (4) in such a way that the essentially in the same way as the Concrete finisher (4) moving concrete pump (14) always runs on sufficiently hardened pouring concrete. Arrangement according to claim 1, characterized in that when the arrangement operates continuously at a working speed (v) from the concrete line (16), a minimum distance between the concrete paver (4) and the concrete pump (14) is bridged, which is essentially the product (v · tA ) from the working speed (v) and a hardening time (tA) of the pouring concrete. Arrangement according to claim 1, characterized in that in the discontinuous mode of operation Arrangement with a working speed (v) during a working phase with a working time (t1) and a resting phase with a rest period (t2) from the pump line (16) a minimum distance between the concrete paver (4) and the concrete pump (14) is bridged, which is essentially that Product (v · tA) of the working speed (v) and a hardening time (tA) of the pouring concrete corresponds if the working time (t1) is at least equal to the hardening time (tA), and essentially the product ( $\text{v · (tA - t2)}$

) from the working speed (v) and the difference between the curing time (tA) and the rest period (t2) if the working time (t1) is less than the curing time (tA). Arrangement according to one of the preceding claims, characterized in that the distance bridged by the pump line (16) between the concrete paver (4) and the concrete pump (14) is greater than 100 m, preferably greater than 200 m and most preferably approximately 300 m. Arrangement according to one of the preceding claims, characterized in that the concrete paver (4) can be moved on the formation to the side of the concrete slab (TRG) or on the concrete slab, if necessary on the concrete edge beams of the concrete slab that are raised to the side. Arrangement according to one of the preceding claims, characterized in that only the concrete paver (4) is provided with a travel drive unit (30) and that the concrete paver (4) takes the concrete pump (14) with it via the line supports (18). Arrangement according to claim 6, characterized in that at least part of the coupling connections (70) between the concrete paver (4), the Cable carriers (18) and the concrete pump (14) is designed with coupling play in the direction of travel, the coupling play being 2 to 10 cm, preferably about 5 cm. Arrangement according to claim 7, characterized in that the pump line (16) for length compensation is placed at least in sections on the line carrier in a zigzag fashion. Arrangement according to one of the preceding claims, characterized in that the line carriers (16) comprise light metal lattice frames (50) provided with track bogies (52; 52 '). Arrangement according to claim 9, characterized in that the line carriers (16) comprise further light metal lattice frames (50 ') which can be suspended between successive light metal lattice frames (50) provided with track running gear (52'). Arrangement according to one of the preceding claims, characterized in that the concrete pump (14) is provided with a concrete buffer store (23). Process for producing a ballastless track superstructure, whereby a continuous concrete slab (TRG) is applied to the subgrade (HGT), the track yoke (10) is supported on the concrete slab (TRG) and the gap between the sleepers (8) and the concrete slab (TRG) and pouring out between successive sleepers (8) by means of a concrete paver (4), characterized in that the concrete paver (4) is connected to a concrete pump (14) by means of a pump line (16), the length of the pump line (16) being such that Working speed (v) of the concrete paver (4) is adapted so that the essentially runs in the same way as the concrete paver (4) moving concrete pump (14) on sufficiently hardened pouring concrete.

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