Classifications

• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
  • E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
  • E01B1/001—Track with ballast
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
  • E01B2/00—General structure of permanent way
• • 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
• • 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
  • E01B2203/00—Devices for working the railway-superstructure
  • E01B2203/04—Cleaning or reconditioning ballast or ground beneath

Definitions

• the invention relates to a method for solidifying a ballast bed, in whose upper region thresholds are arranged with rails mounted thereon, wherein the
• Ballast bed are foamed with foam formed from a reactive mixture. Furthermore, the invention relates to a device for carrying out the method.
• the traditional railway track consists essentially of the gravel bed installed on a so-called planum, in which the sleepers, which may consist of wood, concrete or steel, are embedded and on which the rails are fastened.
• ballast stones not only have different geometries, they also have different grain sizes from batch to batch. This leads to significant fluctuations of the void volume in the ballast in the beds.
• the real void volume in relation to the introduced reactive mixture is too large, since the real ballast bed height is greater than the calculated ballast bed height H. This has to much too low
• Foam vent led which has not reached the threshold, a possibly serious error. Because while a foaming is visible, and thus, although laboriously can be remedied, too low a foam vent is not visible and thus downright fatal, because so the required stabilization of the load transfer cone between track grid and planum is not achieved.
• the too low foam sludge must necessarily be corrected by introducing further reactive mixture. This first requires the exact location of the foam heights achieved in the primary foaming process by means of a suitable measuring method, in order to be able to refill further reactive mixture, thus, overall, an extremely complex repair maneuver.
• a foam-destroying liquid e.g. a fatty emulsion
• the inventive method is characterized in that in the ballast tower so much reactive mixture is introduced that at least in the Lastabtragungs Schemee results in a filling of the ballast of foam material extending from the surface of the earth body to the bottom of the thresholds, and that the foaming expanding foam is spatially limited by a cover on or above the ballast bed before completion of the foaming.
• the tolerance band for the cavity volume to be foamed out defines the range from the smallest possible to the largest possible cavity volume to be foamed. In essence, this depends on the packing density, the Schaumschlotgeometrie and the ballast bed height. All these sizes are subject to a certain tolerance, the sum of which is ultimately decisive for the width of the tolerance band for the cavity volume to be expanded.
• the tolerance band for the void volume to be expanded has to be determined empirically by suitable experiments. This usually happens only once in advance and does not have to be repeated constantly.
• the tolerance of the cavity volume brieflyInumenden in the maximum range is now the empirically determined maximum possible void volume of the ballast in the region of the injection point.
• knowledge of the ballast bed height course should be taken into account so as not to bring in unnecessarily much foam, as this causes unnecessary raw material costs. Possibly.
• the cover does not necessarily cover the entire exposed top of the ballast bed.
• the cover covers an area of the ballast bed which extends over a radius of at least 200 mm, preferably at least 300 mm, from an introduction point or introduction line for the reaction mixture.
• the inventive method provides the additional advantage that reactive plastic, which would foam over without cover and represents waste after its removal, avoids the side in the adjacent ballast bed field.
• the prerequisite is, of course, that the cover is sufficiently wide. That is, the inventive method also allows optimal utilization of the reactive plastic used and thus also provides an additional positive, economic aspect.
• this threshold forms part of the cover.
• ballast bed in this context, the totality of all on the subgrade, ie resting on the compacted surface of the earth ballast stones of the railway superstructure; and as a ballast structure is called the structure of the touching gravel stones with the more or less large cavities between the ballast stones. Additional measures may need to be taken on the sides of the ballast bed, so that the foam vent does not escape laterally from the ballast bed. In an advantageous embodiment of the method, therefore, the cover also covers the lateral sloping areas of the ballast bed.
• the inventive method comprises both a complete foaming and a partial foaming of a ballast bed to be solidified.
• completely foaming essentially all cavities in the ballast structure of the respective ballast bed are filled with foam.
• ballast structure In a preferred variant of the method, however, only cavities in the ballast structure are filled up, which are located below the sleepers within the load transfer areas. Accordingly, you also need only minimized covers that limit only the tip of the rising to the threshold foam chambers. This variant is particularly cost-effective, since in this way the use of reactive plastic and thus also the corresponding raw material costs can be minimized.
• the foaming process can essentially begin only when the cover has been placed on or above the ballast bed.
• the time required for applying the cover must therefore be taken into account when activating or catalysing the raw material system. This has the consequence that the curing times for the reactive plastic are longer than in the second variant.
• the decision as to which of the two variants of the method is most suitable can only be made within the framework of the particular, specific application.
• a further embodiment of the method according to the invention provides that a sprayable or spreadable release agent is applied to the underside of the cover.
• a release film e.g. made of polyethylene, placed on the ballast bed.
• Another variant is to seal the underside of the cover itself with a self-releasing material, e.g. made of polyethylene, or another non-stick coating.
• a self-releasing material e.g. made of polyethylene, or another non-stick coating.
• covers which rest directly on the ballast bed, and on the other covers, which are designed so that they are arranged in their stored position with a distance to the ballast bed surface.
• Covers that rest on the ballast bed should generally be flexible, as the ballast bed is usually never completely flat.
• the use of a flexible mat or foil is also advantageous in terms of compensation for tolerances of the spacing of the successive, substantially evenly spaced thresholds.
• the foaming pressure may well be 0.01 to 0.2 bar. This means that the surface force resulting from the foaming pressure on the flexible mat or film must be counteracted either by suitable weighting or by a counter-pressure, for example that of a supported air cushion.
• the necessary counterforce can preferably be applied by a rail vehicle itself, which is part of a corresponding device for carrying out the method according to the invention.
• the covers which are arranged according to the alternative method variant with distance to the ballast bed surface, however, are expediently made of rigid, i. rigid materials such as e.g. made of sheet metal.
• rigid covers already bring with them a certain weighting.
• rail vehicle itself can generally be used for support, since it is usually during the curing of the reactive foam on the cover.
• the distance between the gravel bed surface and the underside of the cover also has the effect of creating a dense plastic surface above the ballast bed, which protects the ballast bed against any soiling, but also against rainwater and ultimately also against effects of freezing moisture.
• the reactive components are metered to at least one high-pressure mixing head and mixed there. Subsequently, the liquid reactive mixture is applied free-flowing on the surface of the ballast structure.
• the liquid reactive mixture is adjusted in such a way that the foaming process essentially begins only when the reactive mixture flowing through the ballast skeleton has reached the surface of the earth body located below the ballast bed.
• ballast scaffold is completely filled with reactive plastic from the subgrade to the area below the sleepers, so that at least within the load transfer areas no harmful air sacks can remain in which the ballast stones would be loose and thus not against turning and shifting would be stabilized.
• the reactive mixture is preferably adjusted so that the foaming process begins with a delay in the range of 3 seconds to 30 seconds.
• the start time must be greater for larger ballast bed heights, e.g. in curves, be significantly longer than at lower ballast bed heights.
• the start time must also be longer if the gravel bed cover is made after the mixture has been added, and it may be shorter if the ballast bed cover is made prior to introducing the liquid reactive mixture.
• the cover can be removed again 5 to 100 seconds after the end of the start time or after the start of foaming. For highly reactive foam systems after approx. 5 to 20 seconds, for very slowly reactive foam systems after approx. 80 to 100 seconds. Since the polyurethane reactive component isocyanate reacts with water, both the ballast stones and the planum should be as dry as possible in order to ensure a perfect chemical reaction sequence.
• ballast stones are already dry before application to the planum, as well as the planum itself, and after the construction of the ballast bed on the planum no more moisture can get into the ballast bed or on the planum, e.g. by covering the ballast bed with a tent roof.
• the foaming machine is located directly behind a tamping machine for filling and compacting the dried ballast. In this way, the ballast bed can be foamed as planned in a defined, dry state.
• the optimum temperature of the ballast bed to be foamed is in the range of about 30 to 35 0 C. That is, in winter, when the temperatures are in the minus range, the ballast stones and the planum must be heated, while at high summer temperatures, the ballast stones and the planum are cooled would.
• relatively high temperatures of the foamable bed to be foamed out as so-called thermal activation and to correspondingly lower the chemical activation, ie the activator or catalyst content.
• the device according to the invention comprises at least one rail vehicle, which is provided with a foaming system for foaming voids in the ballast structure of a ballast bed, wherein the foam is formed from a liquid reactive mixture, and wherein the Foaming plant having at least one mixing device for mixing the components of the reactive mixture and at least one discharge channel for introducing the liquid reactive mixture into the ballast structure.
• the at least one rail vehicle is provided with at least one movable or transportable cover for the spatial limitation of expanding foam.
• the rail vehicle has at least one lifting device, which places the at least one cover on or above the ballast bed before completion of the foaming process and removes it after completion of the foaming process.
• the aggregates for drying and / or tempering are located on the first rail vehicle, as well as a lifting device for placing the covers.
• the Metering units with the storage containers and the at least one high-pressure mixing head with the associated handling device and a lifting device for removing the covers.
• either a one- or a two- or a three-slider mixing head can be used as the high-pressure mixing head.
• a high-pressure mixing head the components are sprayed via nozzles, which convert the pressure energy into flow energy, into a small mixing chamber in which they mix with each other due to their high kinetic energy.
• the pressure of the components entering the nozzles is at an absolute pressure of more than 25 bar, preferably in a range between 30 and 300 bar.
• the mixing chamber is cleaned mechanically after firing by means of a plunger.
• mixing heads may also be used in the method according to the invention, which are blown out with air.
• the main advantage of the high pressure mixing head is the fact that such a mixing head can be cleaned much better and without the use of solvents after each shot.
• high-pressure mixing heads are one-, two- or three-stage mixing heads in question, all of which are self-cleaning. That is, in these types of mixing heads, the complete mixing and discharge system is mechanically cleaned by slide from reactive mixture, so that then no more complicated rinsing and cleaning operations are required.
• a one-, two- or three-slide mixing head is used depends on the degree of difficulty of the mixing task for the reactive mixture.
• a single-slide mixing head is quite sufficient, for example the so-called "groove mixing head” known in the polyurethane (polyurethane) industry.
• a two-slide mixing head for example the MT mixing head from Hennecke, is preferably used.
• a high-pressure mixing head which has a separate outlet channel, and through which the reactive mixture can be discharged laminar and free of spatter.
• the cover is non-positively connected to the rail vehicle, wherein the weight of the rail vehicle is greater than the force acting on the cover foaming, which can be determined from the foaming pressure and the surface.
• FIG. 1 shows a section of a railway superstructure (track superstructure) in vertical
• Figures 2 and 3 a section of a railway superstructure (track superstructure) in vertical
• FIG. 4 shows a vertical cross-sectional view of the railway superstructure of FIG. 3 along the section line A - A with foamed ballast bed
• FIGS. 5 and 6 show a section of a railway superstructure in vertical longitudinal section view for illustrating a second embodiment of the method according to the invention
• FIGS. 7 and 8 show a section of a railway superstructure in a vertical longitudinal sectional view to illustrate a third embodiment of the method according to the invention
• 9 shows a device according to the invention for foaming the cavities in the ballast structure of a ballast bed with reactive plastic, according to the method variant shown in FIGS. 2 to 4, and
• FIGS. 7 and 8 show a section of a railway superstructure in a vertical longitudinal sectional view to illustrate a third embodiment of the method according to the invention
• 9 shows a device according to the invention for foaming the cavities in the ballast structure of a ballast bed with reactive plastic, according to the method variant shown in FIGS. 2 to 4, and
• FIGS. 7 and 8 show a section of a railway superstructure in a vertical longitudinal sectional view to illustrate a third embodiment of the method according to the invention
• 9 shows a device according to the invention for foaming the cavities in the ballast structure of a ballast bed with reactive plastic, according to the method variant shown in FIGS. 2 to 4, and
• Figure 10 shows a further device according to the invention for foaming the
• Voids in the ballast of a ballast bed with reactive plastic according to the process variant shown in Figures 7 and 8.
• FIG. 1 illustrates the task underlying the method according to the invention. It shows a ballast bed 1 over an uneven planum 2.
• sleepers 3 are arranged, on which a rail track 4 is attached.
• the real void volume in relation to the entered reactive mixture is too small, since the real ballast bed height is significantly smaller than the calculated ballast bed height H. This has led to foaming of the left threshold 3 and the left rail area.
• the real void volume in relation to the registered reactive mixture is too large, since the real ballast bed height is significantly greater than the calculated ballast bed height H. This has led to a too low foam vent, which has not reached the right threshold 3 so that the ballast stones are not stabilized over the too low foam vent.
• FIGS 2 and 3 show schematically the basic sequence of the method according to the invention.
• FIG. 2 further shows a mixing head 5, which is preferably a high-pressure mixing head, to which reactive components 6, 7 are metered and conveyed there be mixed.
• the discharged from the mixing head 5 liquid reactive mixture 8 is applied free-flowing on the surface 9 of the ballast bed 1. It flows through the ballast tower 10 through to the planum 2.
• the liquid reactive mixture is converted into a foam 11, preferably in polyurethane foam (see also Figures 3 and 4). However, the foaming process does not start immediately after discharge from the mixing head 5, but with a time delay.
• a suitable catalyst or activator is added to the reactive components 6, 7. This is done by separate addition of the catalyst or activator either directly into the mixing head 5 or in the metering one of the main components or in the Nach Schollstrom one of the reactive components of the reactive mixture 8.
• the reactive mixture is preferably adjusted by adding the catalyst or activator so that the foaming with a delay in the range of 3 sec to 30 sec begins.
• the foaming process can, for example, begin after a time of approximately 15 seconds has elapsed.
• the high-pressure mixing head 5 is returned to its zero position (non-use position) (not shown in the drawing) and a cover 12 by means of a handling device (see also FIG.
• the cover 12 is flexible and can thus adapt to any unevenness of the ballast bed surface. To counteract the foaming pressure of approx. 0.01 bar resulting from the rising foam and secure the cover 12 in its position on the
• ballast bed 1 To fix ballast bed 1, it is supported for example by an air cushion (not shown in the drawing), which is arranged in a housing which in turn is held by the rails 4. At least the underside of the cover 12 is with a
• Non-stick coating provided.
• the start time of the foaming process has been set to about 15 seconds, on the one hand to allow the reactive mixture 8 to flow through to the planum 2, and on the other hand to have time to drive the high pressure mixing head 5 to its zero position (about 6 to 7 sec), and further to have time for applying the cover 12 (about 6 to 7 sec).
• the calculatory remaining 1 sec is in addition to the rise time of the foam of about 4 to 5 seconds from planum 2 to cover 12 initially once a time reserve. Of course, with increasing production experience, the reserve time can be minimized. Approximately 80 sec after the end of the start time or after Shuumbeginn the cover 12 can be removed again.
• the sleepers 3 are used in addition to the cover 12 in order to spatially limit the foam 11 which expands during foaming.
• FIG. 4 schematically shows a section A - A through FIG. 3. It becomes clear that the ballast bed 1 is hermetically sealed on its surface in the Z direction by the cover 12.
• the cover 12 also covers the lateral sloping areas of the ballast bed 1. Excess foam can thus escape only within the ballast bed in the X and Y directions, a preference that illustrates the economy of the method according to the invention.
• FIGS 5 and 6 show schematically a variant of the method of the invention.
• a subgrade 2 Above a subgrade 2 is a ballast bed 1, wherein in the upper part of the ballast bed 1 sleepers 3 are arranged, on which in turn rails 4 are fixed.
• FIG. 5 also shows two high-pressure mixing heads 5, to which reactive components 6, 7 are metered and mixed there.
• the simultaneously discharged from the two high-pressure mixing heads 5, liquid reactive mixture 8 is applied on both sides next to the threshold 3 free flowing on the top 9 of the ballast bed 1.
• the reactive mixture 8 flows through the ballast tower 10 through to the planum 2 and forms there after a certain time foam 11, which rises through the ballast tower to the ballast bed top side 9 (see also Figure 6); the start time for the foaming process in this
• Example has been set to about 9 sec.
• the two high-pressure mixing heads 5 are returned to their zero position (not shown in the drawing).
• a two-part cover 12 is placed on the ballast bed 1 by means of a handling device on both sides of the threshold 3.
• the two parts 12.1, 12.2 of the cover are held together by bolts 12.3, which bridge the relevant threshold 3 or be supported on this.
• the cover 12 extends transversely to the track approximately over the track width of the rails 4. Longitudinal to the track, each of the two parts 12.1, 12.2 of the cover 12 has a width of at least about 200 mm.
• the cover 12 is intrinsic and has a specific weight per unit area of at least about 0.012 kg / cm 2 in order to counteract the foaming pressure of 0.01 bar resulting from the rising foam 11.
• the cover 12 has on its underside a non-stick coating, such as a release film, which prevents sticking of the foam 11 to the cover 12.
• the relevant threshold 3 is used in addition to the cover 12 in order to spatially limit the expanding foam 11 during foaming.
• the starting time for the reactive mixture is in this example about 9 sec. This is about 6 sec shorter than in the example shown in Figures 2, 3 and 4, because on the one hand the
• Mixture amount is about 30% less and therefore also the time that is required to flow through the reactive mixture 8 to Planum 2 (about 4 to 5 sec) and On the other hand, the time for placing the cover 12 is also shorter (about 3 to 4 sec), because the cover 12 is much easier to handle according to Figure 6.
• the curing time for the reactive plastic can be reduced.
• the cover 12 already about 60 sec. After the end of the start time or after the start of foaming are removed again.
• FIGS. 7 and 8 show schematically further process variants for the process according to the invention.
• the same numbers in FIGS. 7 and 8 as in FIGS. 2, 3 and 4 or 5 and 6 also identify similar elements in each case.
• FIGS. 7 and 8 two further variants of the method are shown with respect to FIGS. 2, 3 and 4 or 5 and 6.
• the first variant is that the cover 12 is placed over the ballast bed 1 before the introduction of the reactive mixture (see FIG. 7) and the reactive mixture 8 is introduced freely flowing through an opening 14 in the cover 12 and the opening 14 is then again filled with a automatically operated closure element 15 is closed (see Figure 8).
• a automatically operated closure element 15 is closed (see Figure 8).
• the cover 12 can be removed after about 40 seconds.
• the second variant shown in FIGS. 7 and 8 consists in the fact that the cover 12 is not placed on the ballast bed 1 but is placed at a distance from the upper side 9 of the ballast bed 1.
• the distance between the bottom of the cover 12 and the top 9 of the ballast bed 1 may be in the range of 0.5 cm to 10 cm, preferably in the range of 0.8 cm to 8 cm. Particularly preferred is a distance in the range of 1 cm to 5 cm. This is possible because, for example, outside on the rigid, plate-shaped body of the cover 12 holding elements 12.4 are attached, with which the cover 12 is suspended from the sleepers 3.
• the plate-shaped body of the cover 12 is dimensioned to play with less than 40 mm, preferably less than 30 mm, more preferably less than 20 mm between two adjacent sills 3 is placeable.
• the cover 12 according to Figures 7 and 8 has on its underside a non-stick coating, such as a release film, which prevents sticking of the foam 11 to the cover.
• FIG. 9 shows by way of example, schematically a device according to the invention for filling the cavities in the ballast structure 10 of a ballast bed 1 with
• Reactive plastic e.g. with polyurethane.
• a planum 2 there is a gravel bed
• Rail vehicle 17.1 an aggregate 20 for tempering the subgrade 2 and the
• the unit 20 comprises, in addition to a heater (not shown in detail) for heating the ballast bed 1 at low outdoor temperatures, such as in winter, preferably also a cooling device (also not shown in detail) for cooling the ballast bed 1 at high outside temperatures.
• a heater not shown in detail
• a cooling device also not shown in detail
• ballast stones 21 have been delivered in this example in a dried state and applied by a separate work train (not shown in the drawing) on the already pre-dried Planum 2.
• a mobile tent roof 22 has been placed so that both ballast bed 1 and 2 Planum are protected from the weather.
• the metering units 23 with the associated storage containers and the hydraulically connecting lines (not shown) for a polyol, an isocyanate and a catalyst, further comprising a high-pressure mixing head 5 with associated mixing head handling device 24th
• the registered in the ballast bed 1 Reeducationgemisch 8 has a starting time of about 15 seconds to have enough time to flow through the one hand, the reactive mixture to Planum 2 or drive the high pressure mixing head 5 in its zero position and on the other hand after the mixture entry and the driving away of the high-pressure mixing head nor the cover 12 can hang up.
• a stacking 25 for a plurality of covers 12 and one handling device (lifting device) 26, 27 for placing the covers 12 on the ballast bed 1 and for removing the covers 12th Der Stacking 25 is associated with a sensor (not shown) that detects the presence of covers 12 in the region of the stack.
• the covers 12 are placed between the thresholds 3 on the ballast bed 1. They are intrinsically difficult in order to be able to counteract the foaming pressure of approx. 0.01 bar.
• All units or devices 19, 20, 23, 24, 5, 25, 26, 27 communicate via impulse lines with the central computer 18, so that a fully automatic operation can take place.
• FIG. 10 illustrates a further exemplary embodiment of a device according to the invention for foaming the cavities in the ballast structure of a ballast bed 1 with reactive plastic, for example with polyurethane.
• the device shown in Figure 10 is provided for carrying out the process variant shown in Figures 7 and 8.
• the device comprises two Suumzug forming rail vehicles 17.1, 17.2, which are electronically coupled by means of a central computer 18.
• the unit 20 comprises, in addition to a heater for heating the ballast bed 1 at outside temperatures below the desired process temperature of about 30 to 35 0 C preferably also a cooling device (not shown), with which the ballast bed 1 optionally cooled at a higher temperature than the desired process temperature can be.
• ballast stones 21 have also been delivered in this state in the dried state and applied by a separate work train (not shown) on the already pre-dried Planum 2 and compacted.
• a mobile tent roof 22 has been arranged in order to protect the ballast bed 1 and 2 the Planum from the weather.
• ballast bed 1 In the case of a wet ballast bed 1, there is a heating device on the first rail vehicle 17.1 or a third rail vehicle (not shown) ahead of the first rail vehicle 17.1, by means of which the ballast bed 1 and the surface 2 are dried.
• first rail vehicle 17.1 On the first rail vehicle 17.1 are also a stack 25 of several covers 12 and a lifting device 26 for placing the covers 12 above the ballast bed first
• the covers 12 are placed above the ballast bed 1 prior to the introduction of liquid reactive mixture 8. They are each made of a rigid, formed plate-shaped body which is dimensioned so that it can be placed with play of less than 20 mm between two adjacent thresholds 3. Each of the covers 12 is provided with retaining elements 12.4, which project laterally relative to the longitudinal sides of their plate-shaped body. With these holding elements 12.4, the respective cover 12 can be placed on two adjacent sleepers 3, so that the underside of its plate-shaped body is spaced from the top 9 of the ballast bed 1.
• the cover 12 further has a passage opening 14 for the passage of liquid reactive mixture 8 into the scaffold and a closure element 15 associated with the passage opening.
• the closure element 15 is preferably integrated in the cover 12 and is actuated by means of the lifting device 26 and / or by means of a discharge nozzle on the mixing head 5 of a foaming system, so that the through-opening 14 is opened in the cover 12 and closed again.
• metering units 23 with the associated storage containers and hydraulically connecting lines (not shown) for a polyol, an isocyanate and a catalyst, and further a high-pressure mixing head 5 with associated mixing head handling device 24th
• a lifting device 27 which placed above the ballast bed 1 covers 12 after completion of
• the two rail vehicles 17. 1, 17.2 are preferably with another
• Conveying device for example, a conveyor belt, a roller belt or a chute equipped, which / which recorded with the lifting device 27 covers 12 from the second rail vehicle 17.2 to the stacking 25 of the first
• Rail vehicle 17.1 transports or directs.
• the foaming systems shown schematically in FIGS. 9 and 10 can, according to a further advantageous embodiment of the invention, also have one or more sensors (not shown) for detecting introduction points for the liquid reactive mixture 8 provided on the ballast bed 1.
• a further advantageous embodiment of the device according to the invention is that the rail vehicle 17.1 is equipped with at least one geophysical measuring device (not shown) for determining the local height of the ballast bed 1 at the point of introduction of the reactive mixture 8, wherein a computer or the central computer 18, the amount of to be introduced reactive mixture 8 as a function of the determined ballast bed height controls.

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

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• 2007
  • 2007-11-27 DE DE102007057064A patent/DE102007057064A1/de not_active Withdrawn
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  • 2008-11-08 WO PCT/EP2008/009435 patent/WO2009068169A1/fr not_active Ceased
  • 2008-11-08 JP JP2010535261A patent/JP5274571B2/ja not_active Expired - Fee Related
  • 2008-11-08 EP EP08854426A patent/EP2227598B1/fr not_active Not-in-force
  • 2008-11-08 AT AT08854426T patent/ATE541989T1/de active
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