EP1817463B1 - Method for correcting height defects in a track - Google Patents

Abstract

The invention concerns a method for correcting height defects (y-), which consists in lifting a track by superelevation (y+), above a final ideal position (X) and tamping same, thereby enabling a temporary ideal position (X<SUB>v</SUB>) to be obtained. Then with a view to stabilizing the track, the ballast bed of the track (2) is subjected to a different compaction to obtain finally, the desired ideal position (X). It is thus possible to prevent the track from returning to the previous defective position.

Description

The invention relates to a method for correcting height misalignments of a track, wherein this supports under lifting in a provisional target position and is subsequently lowered in a final target position in a track stabilization by applying a static load in conjunction with transverse vibrations finally controlled.

By US 6 154 973 a method for track position correction is known, in which after the clogging of the track, the track position is measured to determine long-term positional errors. Subsequently, by the use of a track stabilizer, a controlled lowering of the track into a final desired position, whereby the long-wave errors are eliminated by changing the static load or the transverse vibrations.

The object of the present invention is now to provide a method of the generic type with which the durability of the corrected track position can be improved.

According to the invention, this object is achieved by a method of the type mentioned above in that the track is raised and stopped with a correlation to the respective error value of the altitude error elevation over the final target position addition.

As a result of this elevation of the track, which is targeted in relation to the altitude errors, sections with greater altitude errors are automatically more densely compressed during the subsequent track stabilization. This can be reliably prevented that these track sections fall relatively quickly due to the traffic load back to their old faulty position. It is of particular advantage that this effect can be achieved only with minimal additional effort.

Further advantages and embodiments of the invention will become apparent from the other claims and the drawings.

Fig. 1

eine Seitenansicht einer Maschine zur Gleislagekorrektur, und

Fig. 2

eine schematische Darstellung verschiedener Zustände der Gleislage.

In the following the invention will be described in more detail with reference to embodiments shown in the drawing.
Show it:

Fig. 1

a side view of a machine for track position correction, and

Fig. 2

a schematic representation of various states of the track position.

An in Fig. 1 apparent machine 1 for the position correction of a track 2 has a composite of two frame parts 3.4 machine frame 6 and 7 rail carriages. The - with respect to a working direction 8 - front frame part 3 has a Stopfaggregat 9 for Unterstopfen thresholds 10. The rear frame part 4 are associated with stabilization units 11, which can be pressed with a vertical load on the track 2 and this set simultaneously in transverse vibrations.

The tamping unit 9 positioned on the front frame part 3 is arranged on a satellite frame 13 together with an upstream track lifting unit 12. This is mounted with a front end by a drive 5 longitudinally displaceable on the frame part 3, while a rear end is supported on its own rail chassis 7. Above this there is a working cabin 14 connected to the front frame part 3 with a control device 15. A reference system 17 having measuring axes 16 is provided for the track position correction.

The x-axis of an in Fig. 2 The y-axis represents the altitude error. An actual position X _{i of} the track 2 registered by the reference system 17 is characterized by error values of altitude errors y- of different magnitudes. Previously, it was customary to raise the track in a desired position X and to support. Subsequently, this, provisional 'target position X by the action of static load and transverse vibrations evenly lowered and compacted as part of track stabilization.

According to the method according to the invention, the track 2 is then lifted with an elevation y + which correlates y to the respective error value of the altitude error y + beyond the final nominal position X and - while forming a provisional nominal position X _v - is supported. It is essential that the respective detected by a distance sensor 18 local position X _s and - for the altitude error y- correlating - value of the superelevation y + registered and stored in the control device 15. Conveniently, the overshoot y + is proportional to the altitude error y-.

The subsequent lowering of the track 2 by the use of the stabilization units 11 takes place practically at a distance d between them and the tamping unit 9 with a time delay. For this purpose - depending on the odometer 18 registered distance d - each stored elevation y + retrieved by the control unit 15 and the static load and the oscillation frequency of the transverse vibrations of the stabilization units 11 activated until a final target position X of the track 2 is reached , This is registered by a reference frame 20 associated with the rear frame part 4 in conjunction with a measuring axis 19. At the higher altitude errors y- the static load and / or the oscillation frequency are automatically increased. This is despite a continuous right of way of the machine 1, a different compression possible.

By correlating to the height errors y- or proportional elevation of the tendency of the track 2 is reliably counteracted to a return to the 'old' - present before the stuffing - - height errors, since now sections with major position errors are more compacted than sections with low errors ,

Of course, the method according to the invention can also be carried out when the stabilization units 11 are located on an independently movable vehicle, a so-called track stabilizer. In this case, the required data (local position and value of the elevation) are transmitted by radio to a control unit of the track stabilizer. In order to achieve a greater reduction of the track in the desired position X in the case of major positional errors, it would also be possible to vary the forward speed of the track stabilizer.

Claims (5)

1. A method of correcting vertical geometry faults (y-) of a track (2), wherein said track is tamped while being lifted into a preliminary target position (X_v) and subsequently, within the scope of a track stabilization, is finally lowered in a controlled way into a final target position (X) by application of a static load in connection with transverse vibrations, characterized in that the track (2) is lifted beyond the final target position (X) with a superelevation (y+) correlating to the respective fault value of the vertical geometry fault (y-), and tamped.
2. A method according to claim 1, characterized in that the value as well as the local position (xs) of the respective superelevation (y+) is stored and used for controlling the lowering of the track by means of the track stabilization.
3. A method according to claim 2, characterized in that, during the subsequent track stabilization for lowering the track (2) into the target position X, the vertical load is changed in dependence upon the vertical geometry faults (y-).
4. A method according to claim 2 or 3, characterized in that, during the subsequent track stabilization for lowering the track (2) into the target position X, a vibration frequency of the transverse vibrations is changed in dependence upon the vertical geometry faults (y-).
5. A method according to claim 1, characterized in that, for lowering the track (2) into the target position X, a speed of advance of a machine carrying out the track stabilization is changed in dependence upon the vertical geometry faults (y-).

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