System and method for maintaining a track mounted on a ballast bed

Abstract

The invention relates to a system (4) for maintaining a track (6) mounted on a ballast bed (5), comprising a tamping machine (1) for correcting the track position and a ballast leveling machine (2) for correcting the ballast bed profile. The tamping machine (1) is paired with a first measuring device (19) for detecting measurement data of the corrected track position, wherein the ballast leveling machine (2) is paired with a second measuring device (24) for detecting measurement data of the corrected ballast bed profile, wherein the measurement data detected by each measuring device (19, 24) is supplied to a common analysis device (20) on the basis of a common location reference. In this manner, combined measurement data is available in the analysis device (20), said measurement data being used to evaluate the results of the track correction and of the ballast bed profiling process on the basis of location.

Description

[0001] System and method for maintaining a

[0002] Ballast bed of track

[0003] The invention relates to a system for maintaining a track laid in a ballast bed, comprising a tamping machine for correcting a track position and a ballast leveling machine for correcting a ballast bed profile. The invention also relates to a method for operating the system.

[0004] A generic system for track maintenance is known, for example, from WO 2023 / 110651 A1 and comprises a tamping machine and a ballast leveling machine. The track is tamped using the tamping machine. This corrects the track position, and the track is fixed in its corrected position by the tamping process. After being worked on by the tamping machine, the track is swept and ploughed using the ballast leveling machine to create a consistent track bed with a specified ballast profile.

[0005] Typically, the track position is recorded after a tamping operation using a measuring system, such as measuring chords and inclination sensors. Various track parameters such as longitudinal height, direction, transverse height, twist, etc. are recorded in an electronic evaluation device, commonly referred to as a recorder or data recording processor. In this way, the result of each tamping operation is documented.

[0006] The invention is based on the object of improving a system of the type mentioned above so that work results can be easily evaluated. In particular, rapid release of the processed track should be enabled. A further object of the invention is to provide a corresponding method.

[0007] According to the invention, these objects are achieved by the features of independent claims 1 and 11. Dependent claims specify advantageous embodiments of the invention.

[0008] A first measuring device for recording measurement data of the corrected track position is assigned to the tamping machine, wherein a second measuring device for recording measurement data of the corrected ballast bed profile is assigned to the ballast levelling machine, and wherein the measurement data recorded with the respective measuring device are fed to a common evaluation device on the basis of a common location reference. In this way, consolidated measurement data is available in the evaluation device, by means of which the results of the track position correction and the ballast bed profiling can be assessed on a location-specific basis. In addition to the correct track position, a consistent ballast bed is essential in particular for high-speed lines so that the line can be released. A common location reference is defined as a reference variable that changes along the track or a sequence of reference elements arranged along the track.In any case, each point on the track can be clearly identified using the reference size or the respective reference element.

[0009] Advantageously, the common location reference is defined as a location-specific track feature, in particular as a track gauge, with the tamping machine and the ballast leveling machine each comprising a measuring arrangement for recording the location-specific track feature. This ensures precise location-specific assignment of the measurement data based on the track itself. No further measuring systems such as a global navigation satellite system GNSS or reference markers along the track are required. In addition to the track gauge, other features that have a characteristic course along the track are suitable as location references, for example surface patterns on the rails or the sleepers.

[0010] To capture the characteristic features of the track, the measuring arrangement preferably comprises two laser scanners directed against the rails. This allows, in particular, the minimal changes in the track gauge to be precisely recorded, with the two laser scanners mounted on a common measuring base. For example, two light-section sensors are used, each with a measuring line running perpendicular to the track axis. A measuring frame mounted on a bogie serves as the measuring base, for example.

[0011] In an advantageous embodiment, the first measuring device of the tamping machine comprises an inertial measuring unit for detecting position changes or an inertial navigation system having an inertial measuring unit. Simultaneously with the position detection by the inertial measuring unit, the position of the inertial measuring unit relative to the rails of the track is detected, for example, using a laser scanner. The various track parameters such as longitudinal height, direction, transverse height, torsion, etc., can be derived from the resulting measurement data.

[0012] An advantageous embodiment of the second measuring device comprises a laser scanner, by means of which position data of surface points of the track, the ballast bed and the

[0013] surroundings can be recorded. In particular, the second measuring device is a rotating 3D laser scanner. The result of this data acquisition is a point cloud from which the profile of the ballast bed and the track can be derived. Furthermore, the point cloud can also be used to detect individual ballast grains that have mistakenly remained on sleeper surfaces after a sweeping operation. Such a result can locally trigger another sweeping operation.

[0014] In an improved development, the tamping machine and the ballast leveler are coupled via a radio link for data transmission, with the evaluation device being arranged in particular in the tamping machine. The radio link is established, for example, via an existing mobile radio network or by means of a proprietary radio system. Radio-based data transmission via a cloud system can also be provided. Preferably, a measurement recorder present in the tamping machine is used as a shared evaluation device. Alternatively, the shared evaluation device is arranged in a spatially remote system control center. In this case, the tamping machine also transmits the measurement data to the system control center via a radio link, for example using an existing mobile radio network.

[0015] A preferred development of the system comprises an overhead line vehicle which, during operation, is arranged downstream of the tamping machine and is used to correct the overhead line position. A third measuring device for recording measurement data of a corrected overhead line position is assigned to the overhead line vehicle, wherein the recorded measurement data are fed to the common evaluation device on the basis of the common location reference. A correction of the overhead line is necessary in any case if the position of the overhead line in relation to the track lies outside a predetermined tolerance or permissible range due to raising and straightening of the track. In such a case, the contact wire and the supporting cable of the overhead line are readjusted on the booms of the masts by means of devices arranged on the overhead line vehicle.

[0016] Advantageously, the third measuring device comprises a radar sensor, which can detect at least the course of the contact wire. The radar sensor can be used regardless of weather and lighting conditions.

[0017] A further improvement to the overhead line vehicle allows repositioning of the contact wire and the suspension cable while the overhead line is switched on. This is achieved by arranging an electrically insulated and remotely controlled overhead line manipulator on the overhead line vehicle. Preferably, several electrically insulated overhead line manipulators are arranged. The contact wire and suspension cable are held in position by means of hydraulic pusher units. To set the desired position, an adjustable measuring bracket is placed on the contact wire. A robotic arm with various tools is used to adjust and secure the suspension points.

[0018] If the system is expanded advantageously, the

[0019] Tamping machine a dynamic track stabilizer for

[0020] Stabilization of the track is arranged downstream, wherein the dynamic track stabilizer comprises a fourth measuring device for recording measurement data of the stabilized track and wherein the recorded measurement data is fed to the common evaluation device on the basis of the common location reference. The dynamic track stabilizer is either designed as a stand-alone rail vehicle or arranged together with the tamping machine in an integrated rail vehicle. The track is stabilized by means of a stabilization unit that is clamped onto the rails by means of tensioning rollers and pressed vertically onto the track by means of a load cylinder. A vibration generator integrated in the stabilization unit sets the track into horizontal vibrations, thereby anticipating settlement processes that would otherwise be caused by regular traffic.In this way, the tamped track can be released immediately after processing without any speed restrictions.

[0021] The method according to the invention for operating the system comprises the following method steps:

[0022] - Positioning the tamping machine at the beginning of a working section of the track;

[0023] - tamping the track along the processing section, recording measurement data of the corrected track position and storing the recorded measurement data with reference to the common location reference in the common evaluation device;

[0024] - Positioning the ballast leveller at the beginning or before the beginning of the section of track to be worked on;

[0025] - Profiling the ballast bed, recording measurement data of the corrected ballast bed profile, and saving the recorded measurement data with reference to the common location reference in the common evaluation unit. Thus, all measurement data is immediately available in the evaluation unit, which can be used to evaluate the work results of the tamping machine and the ballast leveler.

[0026] In an advantageous development of the method, the recorded measurement data of the corrected ballast bed profile are sent from the ballast leveling machine to the evaluation device via a radio link. The measurement data of the corrected ballast bed profile and the measurement data of the corrected track position are combined in the evaluation device based on the common location reference. This improvement combines the measurement data from the tamping machine and the ballast leveling machine in real time. A comparison with specified tolerance ranges thus enables an immediate assessment of whether the track section can be released for regular operation.

[0027] In a further improvement, after the track has been tamped, and especially after track stabilization, the position of an overhead line along the section being worked on is corrected using an overhead line vehicle. Recorded measurement data for a corrected overhead line position based on the common location reference are fed to the common evaluation device. These measures result in comprehensive location-specific measurement data that document the condition of the track and overhead line after the work has been carried out and are available for track release.

[0028] For efficient use of the system, the tamping machine, ballast leveller and overhead line vehicle are advantageously coupled together during a transfer trip, whereas during a work trip the tamping machine, ballast leveller and overhead line vehicle are operated separately. The safety and communication equipment required for the transfer trip is then only required for the tamping machine designed as a drive vehicle, for example. The drives of the ballast leveller and the overhead line vehicle are designed for optimum operation at low speeds during work operations. This method permits emission-free operation because the ballast leveller and the overhead line vehicle are powered by batteries. These batteries are charged during a transfer trip using charging devices in the drive vehicle.

[0029] Advantageously, the tamping machine is supplied with power from the overhead line during the transfer run and especially during the work run. Furthermore, the ballast leveler and the overhead line vehicle can also be supplied with power from the switched-on overhead line during a work run if the overhead line manipulators of the overhead line vehicle are electrically insulated and remotely controlled.

[0030] The invention is explained below by way of example with reference to the accompanying figures. They show schematically:

[0031] Fig. 1 Vehicle combination with a tamping machine, a ballast leveler and an overhead line vehicle during a transfer trip;

[0032] Fig. 2 Maintenance system with a tamping machine, a ballast leveler and an overhead line vehicle during a work operation;

[0033] Fig. 3 Tamping machine in a side view;

[0034] Fig. 4 Ballast leveler in a side view;

[0035] Fig. 5 Overhead line vehicle in a side view;

[0036] Fig. 6 Track section with gauge diagram;

[0037] Fig. 7 recorded measurement data of the tamping machine;

[0038] Fig. 8 recorded measurement data of the ballast leveler;

[0039] Fig. 9 recorded measurement data of the overhead line vehicle;

[0040] Fig. 10 combined measurement data in the evaluation device.

[0041] Fig. 1 shows a tamping machine 1, a ballast leveling machine 2 and an overhead line vehicle 3 as components of a system 4 for maintaining a track 6 laid in a ballast bed 5 in a vehicle combination. The track 6 comprises sleepers 7 which, with rails 8 fastened thereon, form a track grid. An overhead line system comprises masts 9 to which an overhead line 10 with a contact wire 11 and a supporting cable 12 is fastened by means of a boom 13. Between the masts 9, the contact wire 11 is connected to the supporting cable 12 by means of hangers. The contact wire 11 is usually laid in a zigzag pattern at a predetermined height above the associated track 6.

[0042] The vehicle combination enables a joint transfer journey between construction sites, whereby, for example, the tamping machine 1 is designed as a drive vehicle with a drive 14 supplied from the overhead line 10.

[0043] The ballast leveling machine 2 and the overhead line vehicle 3 are connected to the tamping machine 1 by means of couplings 15. Preferably, automatic couplings 15 are provided so that the vehicles 1, 2, 3 can be automatically separated from each other upon reaching a construction site.

[0044] The ballast leveler 2 and the overhead line vehicle 3 each comprise their own drive units 14, which are designed specifically for low-speed work travel. In an extended variant, the drive units 14 also enable higher speeds for separate transfer travel. Optionally, each track-laying machine 1, 2, 3 includes an electrical energy storage unit 16, which serves as a power supply when the overhead line 10 is switched off.

[0045] Driving on track 6 and weather influences lead to changes in the track geometry. Wear mechanisms in the ballast lead to track geometry errors in the form of horizontal and / or vertical deviations from the desired target geometry of track 6. When defined limit values ​​are reached, the track geometry is corrected. This is done by means of the tamping machine 1, whereby the track geometry is restored by a lifting and straightening unit 17 and fixed by means of a tamping unit 18. In the simplest case, the so-called adjustment method is carried out without known alignment parameters. This reduces deviations from the existing track geometry. With an improved adjustment method, known alignment parameters and alignment points are taken into account when reducing track geometry deviations.

[0046] In the so-called precision method for maintaining track 6, measurements are performed prior to the actual track maintenance. Specifically, track 6 is measured relative to defined fixed points as a basis for calculating correction values ​​based on the determined difference from the nominal track position. Following this preliminary work, the actual track maintenance is carried out using tamping machine 1, during which track 6 is raised and laterally aligned according to the calculated correction values.

[0047] Before a processed track section can be released for regular traffic, the quality of the track alignment correction must be checked. For this purpose, the track machine 1 comprises a first measuring device 19 as a final measuring system for recording the corrected track alignment. The recorded measurement data is fed to an electronic recorder, also called a data recording processor (DRP). This is an evaluation device 20 for recording, evaluating, and displaying various track parameters such as longitudinal height, direction, transverse height, twist, etc.

[0048] As shown in Fig. 2, the tamping machine 1, the ballast leveling machine 2, and the overhead line vehicle 3 are moved separately along the track 6 during track maintenance. Following the track position correction, the profile of the ballast bed 5 is corrected by the ballast leveling machine 2 using flank ploughs 21 and a center plough 22. In the process, the desired parameters of the ballast bed, e.g., slope angle, are restored. In addition, ballast is swept from the sleepers 7 and rail fastenings using a sweeping brush 23.

[0049] To record measurement data of the corrected ballast bed profile, the ballast leveling machine 2 comprises a second measuring device 24. According to the invention, both the measurement data of the corrected position of the track 6 and the measurement data of the corrected ballast bed profile are fed to the evaluation device 20 based on a common location reference. Preferably, the electronic measurement recorder of the tamping machine 1 is designed as this common evaluation device 20. Alternatively, the common evaluation device 20 is arranged in a system control center 25.

[0050] The overhead line vehicle 3 shown in Fig. 5 is used as an option. Due to the raising and lateral displacement of the track 6 during the work carried out with the tamping machine 1, the existing position of the overhead line 10 with respect to the track 6 must be re-evaluated. As soon as a predetermined tolerance or permissible range is exceeded or not met and the distance between the track 6 and the overhead line 10 is too small for the lead play, the overhead line 10 is readjusted by means of the overhead line vehicle 3. In this process, the contact wire 11 and the supporting cable 12 are brought into the desired position by means of hydraulic pusher units 26. An adjustable measuring bracket 27 is used to specify this desired position. The overhead line 10 is fixed to the respective boom 13 by means of a robot arm 28 and various tools.

[0051] The new position of the overhead line 10 relative to the track 6 is detected and recorded by a third measuring device 29. This third measuring device 29 comprises, for example, a radar sensor by means of which a distance between a measuring base of the overhead line vehicle 3 and the contact wire 11 is detected. Such a radar sensor can be used in any weather regardless of the prevailing lighting conditions. Alternatively, an optical sensor or another distance measuring sensor is used. The current position of the measuring base relative to the track 6 is determined, for example, by means of laser scanners 30 directed against the rails 8. The resulting measurement data indicate, in particular, the course of a vertical distance and a horizontal distance between a track axis A running between the rails 8 and a lower edge of the contact wire 11.These measurement data of the corrected overhead line position are also fed to the common evaluation device 20 on the basis of the common location reference.

[0052] Advantageously, all overhead line manipulators 26, 27, 28 that come into contact with the overhead line 10 are insulated from a supporting frame 32 of the overhead line vehicle 3 by means of a respective electrical insulation 31. Furthermore, these overhead line manipulators 26, 27, 28 are remotely controlled, so that the contact wire 11 and the supporting cable 12 can be adjusted while the overhead line 10 is switched on. Thus, in this embodiment, all machines 1, 2, 3 can be supplied with electrical energy from the overhead line 10 even while work is being carried out.

[0053] In particular, a radio connection for exchanging measurement data exists between the machines 1, 2, 3 and, if applicable, the system center 25. For example, an existing mobile radio network is used, via which encrypted measurement data is transmitted. The machines 1, 2, 3 and, if applicable, the system center 25 comprise mobile radio modules 33 configured for real-time data transmission.

[0054] The common location reference is used for location-synchronous

[0055] Recording of the measurement data acquired along track 6 using the three measuring devices 19, 24, and 29. The result of the location-synchronized recording is a digital measurement record, from which the corresponding track position parameters, ballast profile parameters, and position parameters of the overhead line 10 are derived for each processed location on track 6. In a simple process, markers arranged on track 6 are used as reference elements for location synchronization. These are, for example, metal strips with stamped identifiers attached to track 6.

[0056] Preferably, a location-specific feature of track 6 is defined as the common location reference, for example, a continuously changing track parameter. In particular, a track gauge g of track 6 serves as the common location reference. In this case, a property of the track gauge g described in AT 514667 A1 is used. The track gauge g deviates slightly along track 6 from the specified target value (e.g., standard track gauge 1435 mm). The course of this deviation results in a random characteristic pattern, based on which each point S t of track 6 is identifiable. The change in track gauge g only needs to be measured along a few meters of track 6 in order to clearly assign it to a track point S t to be able to produce .

[0057] In Fig. 6, a track point S is identified based on the track gauge. tshown as a thick dotted line orthogonal to the track axis A. To identify each point S t For example, track 6 is a section of the track gauge with a distance a before and after the point S t This distance a is a maximum of 10 meters, preferably a maximum of 5 meters and in particular a maximum of 3 meters and a minimum of 1 meter. A small area of ​​the track gauge reduces the required computing power, with each point S t of track 6 can be identified by a clear pattern of the track gauge.

[0058] In order to use this advantageous location reference, each of the three measuring devices 19, 24, 29 is coupled to a measuring arrangement 34 for detecting the location-specific track feature, in particular for detecting the track gauge. The position of the associated measuring device 19, 24, 29 relative to the rails 8 of the track 6 is detected by means of the respective measuring arrangement 34. For example, two laser scanners 30 are attached to a common measuring base. Each of the laser scanners 30 is designed, for example, as a light section sensor and detects the current distance of an inner rail edge relative to the measuring base. This means that during a work run of the respective machine 1, 2, 3, the track gauge g is continuously detected together with the respective detection of the measurement data by the associated measuring device 19, 24, 29. In this way, the respective measurement data are related to the course of the track width g.

[0059] For example, a data set acquired with the first measuring device 19 comprises measured values ​​of the track position parameters such as longitudinal height, direction, transverse height, twist, etc. at a specific track location S t , where these data are calculated with the track gauge g at this specific track point S t are linked. Advantageously, a clocked recording of the track position parameters and the track gauge g takes place at a high clock rate of e.g. 1000 Hz. The data sets recorded in this way reproduce the course of the track position parameters and the associated course of the track gauge g with a sufficiently high degree of accuracy. In the evaluation device 20, the measurement data of the three measuring devices 19, 24, 29 are spatially synchronized on the basis of the matching courses of the track gauge g.

[0060] The tamping machine 1 shown in Fig. 3 comprises, as the first measuring device 19, a measuring carriage which is guided behind a rear bogie 35 on the rails 8 of the track 6 for the purpose of final measurement of the track position. The measuring carriage is arranged so as to float relative to a machine frame 37 by means of a height-adjustable suspension 36 and comprises spreading axes by means of which flanged rollers 38 are pressed against the inner edges of the rails, as described in AT 519003 A4. In this way, the flanged rollers 38 follow the rails precisely. In addition, the distance between the flanged rollers 38 arranged on a common spreading axis is continuously measured by means of distance sensors. This distance between the flanged rollers 38 correlates with the track gauge g of the track 6. The spreading axes therefore form elements of the measuring arrangement 34 for recording the location-specific track characteristic for location synchronization.On the other hand, the spreader axes form elements of the first measuring device 19 mounted on the measuring carriage. Specifically, the spreader axes, together with the distance sensors, detect the position of a measuring frame arranged on the measuring carriage relative to the rails 8 of the track 6. An inertial measuring unit 39 is mounted on the measuring frame. Furthermore, the measuring carriage comprises a distance measuring sensor 40, by means of which a traveled measuring distance s is detected.

[0061] During a work run of the tamping machine 1 in the working direction 41, the inertial measuring unit 39 records a trajectory of the measuring carriage. With the simultaneous detection of the position of the measuring frame relative to the rails 8, the various parameters such as longitudinal height, direction, transverse height, torsion, etc. of the corrected track position are obtained as measured data. In order to derive these track parameters from the recorded signals of the distance sensors and the inertial measuring unit 39, a computing unit is arranged in the tamping machine 1, in particular on the measuring carriage. The signals from the distance sensors and the inertial measuring unit 39 are fed to the computing unit and processed by means of an evaluation logic implemented in the computing unit. As an example, Fig. 7 shows a determined track parameter p2 and the recorded track gauge g over the traveled measuring distance s as measured data of the corrected track 6 in the form of a diagram.

[0062] The ballast leveling machine 2 shown in Fig. 4 comprises a laser scanner system as a second measuring device 24. This is, for example, a rotary laser scanner (e.g. a device from RIEGL Laser Measurement Systems Gesellschaft m. b. H, with the designation VUX-1HA) and / or several line laser scanners as well as an associated control and data processing device. The laser scanner system supplies a high-resolution point cloud of the surfaces of the track 6 and the ballast bed 5 while the ballast leveling machine 2 is traveling forward. Specifically, the surface points of the ballast bed 5 corrected by means of the ballast leveling machine 2 are recorded by the second measuring device 24 being arranged behind the ballast shifting units 21, 22, 23 in the working direction 41.Computationally determined cross-sections through the area spanned by the surface points yield the measurement data of the corrected ballast bed profile . In Fig . 8, as an example, a cross-sectional parameter p2 and the track gauge g are shown against the traveled measurement distance s as measurement data in the form of a diagram . To measure the track gauge g, for example, a measuring frame with two laser scanners 30 directed against the rails 8 is arranged on a bogie 35 . A path measuring sensor 40 for recording the measurement distance s is also located on the bogie 35.

[0063] The overhead line vehicle 3 also comprises a measuring frame with two laser scanners 30 and a distance measuring sensor 40 on a bogie 35. In addition, sensors are arranged to detect the position of a car body 42 in relation to the bogie 35. The third measuring device 29 is fastened to the car body 42 in the working direction 41 behind the overhead line manipulators 26, 27, 28. All measuring signals are fed to a computing unit, wherein relevant distance measurements between the measuring devices are also stored in the computing unit. On the basis of this data, the current position of the third measuring device 29 fastened to the car body 42 in relation to the rails 8 of the track 6 is continuously recorded by means of logic implemented in the computing unit. The result of the measuring and computing processes is measured data for a corrected overhead line position, linked to the track gauge g of the track 6. In Fig.9 shows, as an example, a parameter p3 of the corrected overhead line position and the track width g over the measuring path s as measured data in the form of a diagram.

[0064] In the section of track 6 shown in Fig. 6, a coordinate system XYZ is drawn at a starting point for a measurement. For example, the recorded measurement data of the inertial measuring unit 39 are recorded with respect to this coordinate system XYZ. During track maintenance, each of the track construction machines 1, 2, 3 travels along track 6 and covers the recorded measurement distance s. In the process, the profile of the track gauge g is recorded over the measurement distance s. In an area around the track point S tthe track gauge profile is shown with a thick line. The same section of the track gauge profile is also shown in Figures 7-8 with a thick line. In Figure 10 it can be seen that the matching track gauge profile is used in the inventive location synchronization of the recorded measurement data. Here too, the exemplary section of the track gauge profile is shown with a thick line. Despite the time-shifted recording of the measurement data, the synchronization logic implemented in the evaluation device 20 results in a common digital measurement record of all parameters p2, p2, Pa of the processed track 6, the processed ballast bed 5 and the processed overhead line 10.

[0065] Advantageously, all recorded measurement data are transmitted to the common evaluation device 20 in real time and stored in a memory device. As soon as measurement data with a matching pattern of the track gauge profile are available, the synchronization logic begins to create the common measurement record (Fig. 10). This common measurement record is preferably displayed by means of a respective output unit in each participating track construction machine 1, 2, 3 and, if appropriate, in the system control center 25. In this way, immediate action can be taken to undesirable results of the respective work process. For example, a new tamping process is carried out on a limited section of the track 6 with a subsequent ballast bed correction and / or an adjustment of the overhead line position.After any subsequent processing, the measurement data for this limited track section is determined again and compiled into a common digital measurement record. As an alternative to real-time transmission, data is transmitted after work has been completed when the track construction machines 1, 2, 3 are coupled together for a transfer run. The couplings 15 also comprise contacts for data lines which are provided for transmitting measurement data to the common evaluation device 20. Each of the track construction machines 1, 2, 3 contains a computer unit and its own data memory for temporarily storing the measurement data until data transmission. In this case, the data is compiled into a common measurement record with a time delay and serves to document the work carried out.

Claims

Patent claims 1. System (4) for maintaining a track (6) laid in a ballast bed (5), comprising a tamping machine (1) for correcting a track position and a ballast leveling machine (2) for correcting a ballast bed profile, characterized in that a first measuring device (19) for recording measurement data of the corrected track position is assigned to the tamping machine (1), that a second measuring device (24) for recording measurement data of the corrected ballast bed profile is assigned to the ballast leveling machine (2), and that the measurement data recorded with the respective measuring device (19, 24) are fed to a common evaluation device (20) on the basis of a common location reference.

2. System (4) according to claim 1, characterized in that the common location reference is defined as a location-specific track feature, in particular as a track gauge (g) of the track (6), and in that the tamping machine (1) and the ballast leveling machine (2) each comprise a measuring arrangement (34) for detecting the location-specific track feature.

3. System (4) according to claim 2, characterized in that the measuring arrangement (34) comprises two laser scanners (30) directed against rails (8) of the track (6).

4. System (4) according to one of claims 1 to 3, characterized in that the first measuring device (19) comprises an inertial measuring unit (39).

5. System (4) according to one of claims 1 to 4, characterized in that the second measuring device (24) has a Laser scanner included.

6. System (4) according to one of claims 1 to 5, characterized in that the tamping machine (1) and the ballast leveling machine (2) are coupled via a radio connection for data transmission and that the evaluation device (20) is in particular in the tamping machine (1) is arranged.

7. System (4) according to one of claims 1 to 6, characterized in that an overhead line vehicle (3) for correcting an overhead line (10) is arranged downstream of the tamping machine (1), that a third measuring device (29) for recording measurement data of a corrected overhead line position is assigned to the overhead line vehicle (3), and that the recorded measurement data are fed to the common evaluation device (20) on the basis of the common location reference.

8. System (4) according to claim 7, characterized in that the third measuring device (29) comprises a radar sensor.

9. System (4) according to claim 7 or 8, characterized in that the overhead line vehicle (3) comprises an electrically insulated and remotely controlled overhead line manipulator (26, 27, 28).

10. System (4) according to one of claims 1 to 9, characterized in that a dynamic track stabilizer for stabilizing the track (6) is arranged downstream of the tamping machine (1), that the dynamic track stabilizer has a fourth measuring device for recording measurement data of the stabilized track (6) and that the recorded measurement data are fed to the common evaluation device (20) on the basis of the common location reference.

11. A method for operating a system (4) according to one of claims 1 to 10, characterized by the following method steps: - positioning the tamping machine (1) at the beginning of a processing section of the track (6); - tamping the track (6) along the processing section, recording measurement data of the corrected track position and storing the recorded measurement data with reference to the common location reference in the common evaluation device (20); - positioning the ballast levelling machine (2) at the beginning or before the beginning of the section of track (6) to be worked; - Profiling the ballast bed (5), recording measurement data of the corrected ballast bed profile and storing the recorded measurement data with reference to the common location reference in the common evaluation device (20).

12. Method according to claim 11, characterized in that the recorded measurement data of the corrected ballast bed profile are sent from the ballast leveling machine (2) via a radio connection to the evaluation device (20) and that the measurement data of the corrected ballast bed profile and the measurement data of the corrected track position are combined on the basis of the common location reference in the evaluation device (20).

13. Method according to claim 11 or 12, characterized in that after tamping the track (6) and in particular after track stabilization, the position of an overhead line (10) along the processing section is corrected by means of an overhead line vehicle (3) and that recorded measurement data of a corrected overhead line position are fed to the common evaluation device (20) on the basis of the common location reference.

14. Method according to claim 13, characterized in that the tamping machine (1), the ballast leveling machine (2) and the overhead line vehicle (3) are coupled to one another during a transfer journey and that the tamping machine (1), the ballast leveling machine (2) and the overhead line vehicle (3) are operated separately from one another during a work journey.

15. Method according to claim 14, characterized in that the tamping machine (1) is supplied with energy from the overhead line (10) during the transfer journey and in particular during the working journey.

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