EP4359609A1 - Procédé et système de correction de défauts de position verticale d'une voie ferrée - Google Patents

Procédé et système de correction de défauts de position verticale d'une voie ferrée

Info

Publication number
EP4359609A1
EP4359609A1 EP22733082.6A EP22733082A EP4359609A1 EP 4359609 A1 EP4359609 A1 EP 4359609A1 EP 22733082 A EP22733082 A EP 22733082A EP 4359609 A1 EP4359609 A1 EP 4359609A1
Authority
EP
European Patent Office
Prior art keywords
track
measuring
stabilizer
position data
dynamic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22733082.6A
Other languages
German (de)
English (en)
Inventor
Harald Daxberger
Markus Pröll
Florian Auer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Plasser und Theurer Export Von Bahnbaumaschinen GmbH
Original Assignee
Plasser und Theurer Export Von Bahnbaumaschinen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Plasser und Theurer Export Von Bahnbaumaschinen GmbH filed Critical Plasser und Theurer Export Von Bahnbaumaschinen GmbH
Publication of EP4359609A1 publication Critical patent/EP4359609A1/fr
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
    • E01B27/12—Packing sleepers, with or without concurrent work on the track; Compacting track-carrying ballast
    • E01B27/13—Packing sleepers, with or without concurrent work on the track
    • E01B27/16—Sleeper-tamping machines
    • E01B27/17—Sleeper-tamping machines combined with means for lifting, levelling or slewing the track
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
    • E01B27/12—Packing sleepers, with or without concurrent work on the track; Compacting track-carrying ballast
    • E01B27/20—Compacting the material of the track-carrying ballastway, e.g. by vibrating the track, by surface vibrators
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B35/00—Applications of measuring apparatus or devices for track-building purposes
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/10—Track-lifting or-lining devices or methods
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/16—Guiding or measuring means, e.g. for alignment, canting, stepwise propagation
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
    • E01B29/04—Lifting or levelling of tracks
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B35/00—Applications of measuring apparatus or devices for track-building purposes
    • E01B35/06—Applications of measuring apparatus or devices for track-building purposes for measuring irregularities in longitudinal direction
    • E01B35/08—Applications of measuring apparatus or devices for track-building purposes for measuring irregularities in longitudinal direction for levelling

Definitions

  • the invention relates to a method for correcting vertical position errors in a track after a lifting and tamping process, with a stabilization process carried out by means of a dynamic track stabilizer, in which a stabilization unit on a working direction forwards moving work site acts on the track, with track position data of the unworked track being recorded before the lifting and tamping process, and with track position data of the tamped track being recorded after the lifting and tamping process at a measuring point in the working direction in front of the stabilization unit.
  • the invention relates to a system for carrying out the method.
  • PRIOR ART WO 2006/056215 A1 discloses a method for correcting vertical position errors (height errors) of a track with a ballast bed, whereby this is supported by raising it to a provisional target position and then, as part of track stabilization, by applying a static load in Connection controlled with transverse vibrations is lowered into a final target position.
  • a targeted superelevation of the track in relation to the height errors is specified in order to be able to compact track sections with larger height errors by means of the subsequent track stabilization. This is intended to counteract a rapid sinking into the old faulty track position due to traffic loads.
  • AT 519317 A1 discloses a modified method in which, before a lifting and tamping operation, a smoothed actual position curve is formed from a curve of the actual position of the untreated track.
  • the respective overlift value is subsequently specified as a function of this course of the actual track position with regard to the approximately smoothed actual position course.
  • Additional track position data of the stabilized track is recorded at a re-measuring point in the working direction after the stabilization unit, with the dynamic track stabilizer being controlled during the stabilization process depending on track position data of the unprocessed and the blocked track at the work site and track position data of the stabilized track at the re-measuring point will.
  • the additional re-measurement of the track position after the stabilization process enables precise control of the dynamic track stabilizer.
  • the track geometry measured before and after the lifting and tamping process is used together with the track geometry measured after the stabilization process as the basis for the controlled activation of the dynamic track stabilizer.
  • a longitudinal gradient or longitudinal height and a transverse gradient or superelevation of the track are advantageously measured in each case in order to record the track geometry data at the respective measuring point.
  • the longitudinal inclination or longitudinal height of an inner rail is preferably recorded.
  • the bank or superelevation indicates the position of an outer rail.
  • At least one of the following operating parameters of the dynamic track stabilizer is determined during the stabilization process as a function of the recorded track position data changed: an oscillation frequency of the stabilization unit, a travel speed of the dynamic track stabilizer, an additional load of the stabilization unit acting on a left rail of the track, an additional load of the stabilization unit acting on a right rail of the track and a total additional load acting on the track from the stabilization unit.
  • the stabilization process is expediently started with a predetermined initial value of the respective operating parameter, with an adjusted value being continuously calculated for the respective operating parameter during the stabilization process using an algorithm set up in a computing unit.
  • Weighting factors are preferably stored in the algorithm for the respective operating parameter, with the weighting factors being continuously adapted by means of a regulation. For example, a formula with its own weighting factors is implemented in the computing unit for each changeable operating parameter. The controlled activation of the dynamic track stabilizer is then only carried out by continuously adapting the weighting factors.
  • Such an algorithm enables a high quality of the control, because the characteristics of the existing controlled system and the dynamics of the control are specified separately.
  • a stored adjustment logic of the weighting factors determines the control dynamics.
  • a track position measuring system comprising several measuring devices is carried along with the dynamic track stabilizer, the corresponding track position with respect to a common reference system being recorded at the respective measuring point by means of the assigned measuring devices.
  • the track position data of the track position that changes during the course of processing is collected while the dynamic track stabilizer is moving forward.
  • a track point under consideration is initially in front of the Stabilization unit, where the track position is recorded after the lifting and tamping process. Due to the forward movement of the dynamic track stabilizer, the same track spot becomes the current work spot during the regulated lowering of the track by the stabilization unit, with a measuring point immediately behind it. In the case of a double unit, this measuring point is preferably located between two stabilization unit units.
  • the track geometry data of the lowered track geometry are recorded at the re-measuring point.
  • the respective measuring point corresponds to a track point under consideration in a chronological sequence during a work drive.
  • the reference system is formed by means of a camera attached to one of the measuring devices and a reference mark attached to another measuring device and positioned in a recording area of the camera, with measuring marks attached to the other measuring devices being recorded by the camera to record the track geometry data.
  • Such an optical measuring system delivers precise measuring results for several measuring points, with the common reference system simplifying further processing of the track position data obtained.
  • a reference mark is attached directly to the stabilization unit. The corresponding measuring point thus coincides with the workplace.
  • the vibration amplitudes of the stabilization unit are then also recorded by means of the camera.
  • This additional measured variable can be used as a further parameter for controlling the stabilization process.
  • the system according to the invention for carrying out one of the methods described comprises a track position measuring system and a dynamic track stabilizer for correcting vertical position errors at a moving working point on a track, the track position measuring system for detecting the track position at a measuring point upstream of the dynamic track stabilizer in the working direction and at a measuring point upstream of the dynamic Track stabilizer is set up downstream in the direction of measurement, the dynamic track stabilizer comprising a control device, which is detected by means of the track position measuring system Track position data are supplied and wherein the control device is set up to control the dynamic track stabilizer as a function of the track position data assigned to the work station and the verification point.
  • the control device advantageously includes a computing unit in which an algorithm for recalculating at least one operating parameter of the dynamic track stabilizer on the basis of continuously updated track position data is implemented.
  • a distance between the work site and the final measurement point is in a range between 3 m and 10 m, in particular between 5 m and 8 m. This ensures that an undisturbed actual track position is determined at the re-measuring point after the stabilization process. In this way, the final measurement provides particularly precise data for a control circuit for controlling the dynamic track stabilizer.
  • a stabilization unit comprises a vibration generator and rolling tongs that can be clamped to the rails of the track, the stabilization unit being supported against a machine frame with separately controllable load drives.
  • An advantageous extension of the system relates to a machine network in which a tamping machine is arranged in the working direction immediately in front of the dynamic track stabilizer and the track position measuring system comprises at least one measuring device tamping machine is assigned.
  • the extended track geometry measurement system also extends to measuring points on the tamping machine, so that additional track geometry data is immediately available for controlling the dynamic track stabilizer.
  • the track position measuring system comprises a first measuring device on which a camera is attached, a reference mark being attached to a second measuring device and at least one further measuring device with a reference mark being attached between the first and second measuring device.
  • Such an optical measuring arrangement also delivers exact measuring results over large distances, whereby disturbances caused by vibrations can be filtered out in a targeted manner.
  • Another improvement to this track geometry measurement system includes a flashlight that can be controlled together with the camera. In this way, illumination of the reference marks and measurement marks can be tuned to an exposure time of the camera, so that disruptive influences from sunlight or other light sources are suppressed.
  • the tamping machine 5 and the dynamic track stabilizer 1 form a combined track construction machine.
  • the cyclic forward movement of a tamping unit 6 is adapted to the continuous forward movement of the dynamic track stabilizer 1, for example via a longitudinally displaceable auxiliary frame (satellite).
  • the cyclically operating tamping machine 5 shown in FIG. 1 precedes the dynamic track stabilizer 1 with respect to a working direction 7 .
  • An exaggerated course of a track layout that changes during the work process is used for better illustration.
  • a front rail chassis 3 of the tamping machine 1 travels on the unprocessed track 4. In front of it, a measuring device 8 is guided to record an actual position of this unprocessed track section.
  • This measuring device 8 is an element of a track position measuring system 9 for acquiring track position data at different measuring points 10.
  • track position data of the unprocessed track 4 is acquired using a separate track measuring vehicle.
  • the tamping machine 1 is assigned a measuring system 9 with measuring strings as a reference system.
  • the dynamic track stabilizer 1 includes a further measuring system 9 with its own measuring chords.
  • these two measuring systems 9 are combined to form a common track position measuring system 9 . All recorded track position data are advantageously processed using a common evaluation device 11 . If necessary, data is transmitted between the tamping machine 5 and the dynamic track stabilizer 1 via an air interface.
  • the track position data are fed to a control device 12 for adaptive control of the dynamic track stabilizer 1 .
  • track position data of the unprocessed track 4 or track 4 that has already been blocked, recorded by a separate track measuring vehicle are transmitted in advance to the control device 12 or transmitted via a radio link.
  • the tamping machine 5 comprises a lifting unit 16 which is arranged in front of the tamping unit 6 . In between there is a further measuring device 8 for detecting a lifting operation 17 that has been carried out.
  • each measuring device 8 is designed as a rail-guided device.
  • the respective device 8 comprises flanged rollers, which are pressed against the inner sides of the rails 14 by means of an expansion axis.
  • a non-contact variant of the respective measuring device 8 comprises a carrier on which measuring sensors (eg laser scanners) directed towards the rails 14 are arranged. The position of the measuring device 8 relative to the rails 14 is detected by means of these sensors.
  • a measuring device 8 with an inertial measuring unit (IMU) 18 This is arranged on a measuring frame 19, which is guided on the rails 14 with four flanged rollers. With this measuring device 8 track position data of the blocked track 4 are recorded in a known manner. At the same time, the measuring device 8 serves as a rear reference unit of a chord measuring system built on the tamping machine 5 . The lifted track position is lowered into a final target track position 20 in a subsequent stabilization process. here the dynamic track stabilizer 1 is used.
  • IMU inertial measuring unit
  • the dynamic track stabilizer 1 is controlled as a function of measurement data recorded at a number of measurement points 10 including a post-measurement point 21 .
  • the dynamic track stabilizer 1 is used to lower the track 4 in a controlled manner at a work station 22 moving forward with the machine 1 in the working direction 7.
  • a stabilization unit 23 is clamped onto the rails 14 with roller tongs 24 (Fig. 3).
  • a vibration generator 25 arranged on the stabilization unit 23 causes the track panel in the area of the work station 22 to vibrate horizontally at a predetermined frequency.
  • the stabilization unit 23 is supported in relation to the machine frame 2 via ballast drives 26 which are each associated with the rail 14 located underneath. These load drives 26 are designed, for example, as separately controllable hydraulic cylinders.
  • the static load which acts on the associated rail 14 via wheel flange rollers 27 of the stabilization unit 23, can be changed by changing the application of pressure.
  • a measuring device 8 is arranged directly behind the work station 22 in order to record the track lowering that is currently being carried out.
  • this measuring device 8 is used on the one hand to regulate the lowering of the track 4 and on the other hand to remeasure the undisturbed actual track position 28 after stabilization.
  • a total of four measuring devices 8 are arranged on the dynamic track stabilizer 1 . Seen from the front, the first measuring device 8 is guided on a track section with a raised track position. The second measuring device 8 is located directly behind the stabilization unit 23.
  • the third and the fourth measuring device 8 arranged at defined distances from one another.
  • the four measuring devices 8 form two three-point measuring systems with corresponding measuring chords.
  • a chord is stretched over each rail 14 between the first and the third measuring device 8 for the regulation of the lowering.
  • the reference system for the final measurement of the undisturbed track 4 is formed between the second and the fourth measuring device 8 spanned measuring tendons.
  • the distance (height of the arrow) to the associated measuring chord is measured on the measuring device 8 positioned in between, and the track position is derived from this in accordance with the known traveling chord measuring principle.
  • the position of the third measuring device 8 defines the re-measuring point 21.
  • a distance a between the re-measuring point 21 and the work point 22 is 6 m, for example.
  • the third measuring device 8 is designed as a measuring carriage with an inertial measuring unit 18 arranged on a measuring frame 19 . In this case, the final measurement is carried out only by means of this adapted measuring device 8.
  • the stabilization unit 23 is designed either as a single unit or as a double unit. A double unit comprises two unit units of almost the same design, one behind the other on track 4. In FIG. 1, such a second assembly unit is drawn in with dotted lines.
  • At least one operating parameter of the dynamic track stabilizer 1 is changed during a stabilization process as a function of recorded track position data.
  • What is essential here is the acquisition of track geometry data at a number of measuring points 10, 21, namely at measuring points 10 upstream of the stabilization unit 23 and at a post-measuring point 21 behind the stabilization unit 23.
  • the track position changing during the work process is measured by means of an optical measuring system 9, as shown in FIG.
  • the advantage of this variant is a common reference system for all measurements carried out.
  • a rear measuring device 8 includes a camera 29, which is aimed at all measuring devices 8 located in front.
  • a measuring mark 30 is arranged on each of these measuring devices 8 located in front of it, with one being a Reference mark 30 is defined.
  • a virtual optical chord 31 is stretched between the reference mark 30 and the camera 29 and serves as a reference basis for the position of the other measurement marks 30 .
  • All marks 30 of the measuring system 9 are in a recording range 32 of the camera 29.
  • the respective measuring or reference mark 30 comprises, for example, a crosshair on a reflective surface.
  • the recordings of the camera 29 are continuously evaluated in the evaluation device 11 of the track position measuring system 9 .
  • the distances between the measuring devices 8 and an imaging scale of the camera 29 are known.
  • the evaluation device 11 calculates an actual change in position of the reference mark 30 with respect to the optical chord 31 from a displacement of a reference mark 30 imaged on an image sensor.
  • Corresponding displacement values ⁇ x, ⁇ y (Fig .4). These calculated displacement values ⁇ x, ⁇ y correspond to versine values that are recorded with a conventional chord measuring system.
  • the camera 29 is advantageously set up to capture monochrome images in order to optimize the evaluation.
  • the resolution of the image sensor is 5 megapixels, for example. Shifts in the measuring marks 30 in millimeters can thus be identified.
  • a recording frequency of approx. 200 Hz ensures that changes in position are recognized immediately. This means that around 200 measurements are made per second.
  • the camera 29 is coupled to a flashlight 33 .
  • several high-power LEDs are arranged around a lens of the camera 29 in order to flash in the direction of the reference marks 30 synchronously with the triggering of the camera 29 .
  • the measurement marks 30 are designed as passive elements of the track geometry measurement system 9 (FIG. 4).
  • the respective measuring mark 30 is glued to a suitable surface of the associated measuring device 8 as a retroreflective film. Active measuring marks 30 are shown in FIG. These are controlled together with the camera 29 and light up in the direction of the camera 29.
  • high-power LEDs are preferably used, which flash synchronously when the camera 29 is triggered.
  • the respective measuring mark 30 includes a transparent film that is backlit by an LED flashlight 33 with diffuse light. Compared to a passive measuring mark, a higher light intensity can be achieved, which means that better results can be achieved, especially in dusty surroundings and in bad weather.
  • a further improvement of the track geometry measuring system 9 used in the present invention is shown in FIG. It is taken into account here that in exceptional cases there may be obstacles 34 between the camera 29 and the measuring marks 30 . For example, in the case of strong deflections in curved tracks, individual unit parts can temporarily cover the respective line of sight.
  • a measuring device 8 is assigned several redundant measuring marks 30 here, so that the position of the measuring device 8 can still be reliably detected even if one of the measuring marks 30 does not appear in the image of the camera 29 .
  • the following operating parameters of the dynamic track stabilizer 1 are continuously adjusted: f dgs ... vibration frequency of the vibration generator 24 al dgs ... load of the stabilization unit 23 on the left rail 14 ar dgs ... load of the stabilization unit 23 on the right rail 14 ag dgs ... Total load v dgs ... traversing speed (forward speed) of the stabilization unit 23
  • GNSS data navigation satellite system
  • the following measurement data is recorded in advance and then used to adjust the operating parameters if the respective measurement point 10 corresponds to the current work point 22: h ivs ... actual longitudinal height of the unprocessed track 4 q ivs ... actual transverse slope (actual superelevation) of the unprocessed track 4 h ins ... actual longitudinal height of the blocked track 4 q ins ... actual transverse slope (actual superelevation) of the blocked track 4
  • specified values for a final target track position are used to adapt the operating parameters: h s ...
  • Example formulas for the ongoing adjustment of the operating parameters use the following weighting factors: g f1 ... 1st weighting factor for oscillation frequency g f2 ... 2nd weighting factor for oscillation frequency g a1 ... 1st weighting factor for surcharge g a2 ... 2nd weighting factor for surcharge g a3 ... 3rd weighting factor for surcharge g a4 ... 4th weighting factor for load g v1 ... 1st weighting factor for crossing speed g v2 ... 2nd weighting factor for crossing speed
  • the following initial values are used for the operating parameters: f 0 ... initial value for vibration frequency a 0 ... initial value for the left and the right-hand load v 0 ...
  • the dynamic stabilizer 1 is perfectly adjusted and the weighting factors are not adapted.
  • the factors used k gf1 , k gf2 , k ga1 , k ga2 , k ga3 , k ga4 , k gv1 , k gv2 determine a control gain and are determined, for example, in experiments or simulations.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)

Abstract

Procédé de correction de défauts de position verticale d'une voie ferrée (4) après un processus de levage-tassement, comprenant un processus de stabilisation qui est mis en œuvre au moyen d'un stabilisateur de voie ferrée dynamique (1) et au cours duquel un ensemble de stabilisation (22) agit sur la voie ferrée (4) au niveau d'un point de travail (22) qui se déplace vers l'avant dans une direction de travail (7). Avant le processus de levage-tassement, des données de position de voie ferrée se rapportant à la voie ferrée non travaillée (4) sont enregistrées et, après le processus de levage-tassement, des données de position de voie ferrée se rapportant à la voie ferrée insuffisamment remplie (4) sont enregistrées au niveau d'un point de mesure (10) qui est situé en amont de l'ensemble de stabilisation (22) dans la direction de travail (7). Dans le processus, des données de position de voie ferrée supplémentaires se rapportant à la voie ferrée stabilisée (4) sont enregistrées au niveau d'un point de post-mesure (21) qui est situé en aval de l'ensemble de stabilisation (22) dans la direction de travail (7), le stabilisateur de voie ferrée dynamique (1) étant actionné pendant le processus de stabilisation en fonction de données de position de voie ferrée relatives à la voie ferrée non travaillée et à la voie ferrée insuffisamment remplie (4) au niveau du point de travail (22) et de données de position de voie ferrée se rapportant à la voie ferrée stabilisée (4) au point de post-mesure (21). La post-mesure supplémentaire de la position de voie ferrée après le processus de stabilisation permet une commande exacte du stabilisateur de piste dynamique (1).
EP22733082.6A 2021-06-21 2022-06-14 Procédé et système de correction de défauts de position verticale d'une voie ferrée Pending EP4359609A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT505022021 2021-06-21
PCT/EP2022/066110 WO2022268566A1 (fr) 2021-06-21 2022-06-14 Procédé et système de correction de défauts de position verticale d'une voie ferrée

Publications (1)

Publication Number Publication Date
EP4359609A1 true EP4359609A1 (fr) 2024-05-01

Family

ID=82163276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22733082.6A Pending EP4359609A1 (fr) 2021-06-21 2022-06-14 Procédé et système de correction de défauts de position verticale d'une voie ferrée

Country Status (5)

Country Link
US (1) US20240271371A1 (fr)
EP (1) EP4359609A1 (fr)
JP (1) JP2024525380A (fr)
AT (1) AT17790U1 (fr)
WO (1) WO2022268566A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE254698T1 (de) 1998-03-27 2003-12-15 Plasser Bahnbaumasch Franz Verfahren zur gleislagekorrektur
ES2313109T3 (es) 2004-11-22 2009-03-01 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. Procedimiento para corregir errores de posicion en altura de una via.
AT519317B1 (de) 2016-11-04 2018-12-15 Plasser & Theurer Exp Von Bahnbaumaschinen G M B H Verfahren und Gleisbaumaschine zur Korrektur von Gleislagefehlern
AT520795B1 (de) * 2017-12-21 2020-03-15 Plasser & Theurer Export Von Bahnbaumaschinen Gmbh Gleisbaumaschine und Verfahren zum Nivellieren eines Gleises
AT521956B1 (de) * 2019-03-06 2020-07-15 Plasser & Theurer Export Von Bahnbaumaschinen Gmbh Gleisbaumaschine und Verfahren zum Stabilisieren eines Schotterbettes

Also Published As

Publication number Publication date
WO2022268566A1 (fr) 2022-12-29
AT17790U1 (de) 2023-02-15
JP2024525380A (ja) 2024-07-12
US20240271371A1 (en) 2024-08-15

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