Track layout, procedure for creating this track layout, and procedure for renewing this track layout

Abstract

The invention relates to a track assembly of a fixed track system for forming a track (1) for railway traffic, comprising (a) multiple prefabricated track support slabs (2) made of reinforced concrete, in particular non-stressed reinforced concrete, (b) a molding compound (4) molded between the track support slabs (2), which are aligned in position, and a backing layer (3) and hardened, and (c) multiple rail support points (6), provided in the track support slabs (2) for securing the rails (1), said backing layer (3) consisting of or comprising asphalt, wherein the backing layer (3) projects laterally beyond the molding compound (4) in the transverse direction of the track alignment so as to form a backing layer projection (7), and the backing layer projection (7) is covered by a coating layer (8) that is waterproof and consists of or comprises asphalt.The surface (9) of the covering layer (8) has a downward slope in the transverse direction of the track alignment. The invention further relates to a method for producing said rail assembly and a method for renewing said rail assembly.

Description

[0001] The present invention relates to a track arrangement according to the preamble of claim 1, a method according to claim 13 for forming such a track arrangement and a method according to claim 15 for renewing such a track arrangement.

[0002] In the prior art, so-called slab track systems for railway construction are known and widely used in the construction of modern railway lines. In such systems, instead of sleepers resting on a ballast bed, track support slabs are used to secure the tracks and other equipment, which are arranged on a base course. The track support slabs are fixed to the base course, for example, using a hardened grout. Most commonly, hydraulically bound base courses and / or concrete base courses are used as the base course in the prior art.

[0003] Document EP1882777A1 proposes a method for constructing a slab track for rail vehicles, using rail supports that are already drivable in their unfinished state. Document DE19824395C1 discloses a method for constructing a slab track, in which a concrete base course is applied to a hydraulically bound base course. Document EP0621370A1 shows a method for constructing a ballastless track superstructure, in which an asphalt layer is applied to a concrete substructure, on which sleepers are laid that are anchored to the substructure by means of blind holes.

[0004] In addition to hydraulically bound and concrete base courses, asphalt base courses are also known in the art, offering significant advantages over the aforementioned base courses, for example, in terms of construction time. However, known asphalt base courses have high requirements regarding their manufacturing tolerances, which in turn increases the production costs. Furthermore, adequate drainage must be ensured for asphalt base courses to prevent, for example, frost damage.

[0005] It is therefore an object of the present invention to overcome the disadvantages of existing slab track systems with asphalt base courses and to create a track arrangement that can be manufactured in a time- and cost-efficient manner and is at the same time suitable for the high demands of modern track construction.

[0006] The preferred design is to create a track layout that allows for precise alignment of the track support plates. In particular, the design should extend the service life of the support layer by protecting it from damaging influences such as water ingress, thus preventing frost damage and UV radiation, and consequently, aging. The design should also allow for certain manufacturing tolerances. Furthermore, the design should ensure a strong bond between the grout and the support layer, potentially achieved through interlocking of the grout and the support layer surface without the need for additional anchors or fasteners.

[0007] These and other problems of the present invention are solved by a track arrangement with the features of independent claim 1, by a method for forming such a track arrangement with the features of independent claim 13 and by a method for renewing such a track arrangement with the features of independent claim 15.

[0008] Further preferred embodiments are defined by the features of dependent claims 2-12, 14.

[0009] If necessary, the gradient is provided to be at least 2%, in particular 4%, with the gradient preferably being between 2% and 10%.

[0010] If necessary, the surface of the base course is designed to be free of gradient in the transverse direction of the track.

[0011] The target height is, in particular, the target height in relation to the rail.

[0012] If necessary, the drainage area is designed to have a continuous gradient in the transverse direction of the track.

[0013] If necessary, the top layer is arranged directly on the surface of the base layer.

[0014] If necessary, an outer top layer is provided, which is arranged between the grout and the outer top edge of the base layer, or extends from the grout to the outer top edge of the base layer, wherein the outer top layer has a gradient of at least 4% in the transverse direction of the track.

[0015] If necessary, the width of the outer cover layer is intended to be between 20 cm and 70 cm, preferably between 25 cm and 50 cm.

[0016] If necessary, a drainage layer, in particular made of unbound rock granules, is arranged on the inner cover layer, and a second cover layer is arranged on the drainage layer.

[0017] If necessary, the second surface layer is provided for to have a gradient in the transverse direction of the track layout.

[0018] If necessary, a drainage layer, in particular a drainage mat, is provided laterally on the inner surface layer and, if applicable, on the drainage layer and on the second surface layer between the track support plate and / or grout, wherein the drainage layer does not penetrate the inner surface layer up to the surface of the support layer.

[0019] If necessary, the inner surface layer and, where applicable, the second surface layer are designed to be waterproof and comprise or consist of asphalt.

[0020] If necessary, the inner surface layer is designed to have a gradient of at least 1% in the transverse direction of the track.

[0021] If necessary, the second surface layer is designed to have a gradient of at least 4% in the transverse direction of the track.

[0022] If necessary, the load-bearing layer is designed to have an elastic modulus between 4,000 N / mm² and 6,000 N / m².

[0023] If necessary, the base layer is designed to have a flexural strength between 0.6 N / mm² and 1.0 N / mm².

[0024] If necessary, the load-bearing layer is arranged on a base layer which is formed from or comprises unbound rock granules, in particular gravel.

[0025] If necessary, the base layer is designed to serve as a frost protection layer.

[0026] If necessary, the track support plate is in direct contact with the casting compound, with in particular no elastomer layer being arranged between the track support plate and the casting compound.

[0027] Furthermore, a track arrangement system comprising a first track arrangement and a second track arrangement is revealed, wherein the first track arrangement is a track arrangement according to the invention, and wherein the second track arrangement is a track arrangement of a slab track with a ballastless superstructure, comprising track support plates, a base layer and a grout cast and hardened between track support plates and base layer, wherein the base layer is a hydraulically bound base layer, wherein the base layer of the first track arrangement is arranged on a base layer formed from unbound rock granules.

[0028] If necessary, a transition track arrangement is provided between the first track arrangement and the second track arrangement, comprising track support plates, a base layer and a grout cast and hardened between the track support plates and the base layer, wherein the base layer of the transition track arrangement is arranged on a base layer comprising or consisting of rock granules partially bound with a binder.

[0029] If necessary, the load-bearing layer of the second track arrangement is provided for on a base layer which is designed as a trough structure.

[0030] If necessary, the base layer of the first track arrangement is designed as an earthwork.

[0031] If applicable, the binder is intended to be a hydraulic binder, in particular cement.

[0032] If necessary, the base course in the transition track arrangement is intended to be at least partially a concrete base course.

[0033] If necessary, the base layer of the transition track arrangement is designed to protrude into the base layer of the first track arrangement with a wedge-shaped area.

[0034] If necessary, the transition track arrangement adjacent to the first track arrangement is designed to have the following areas: a. first area, wherein the base course is formed of or comprises asphalt, and wherein the base course comprises or consists of aggregate partially bound with a binder; b. second area, wherein the base course is a concrete base course, and wherein the base course comprises or consists of aggregate partially bound with a binder; c. third area, wherein the base course is a concrete base course, and wherein the base course is a ballastless base course, in particular a trough structure, and wherein the second track arrangement adjoins the third area.

[0035] If necessary, an elastic intermediate element bridging the two areas is provided between the second and third areas, which is arranged across the surface between the load-bearing layer and the base layer.

[0036] The present invention relates optionally to a track arrangement of a slab track comprising several prefabricated track support plates and a grout compound cast and hardened between the track support plates and a base layer. In particular, the base layer consists of or comprises asphalt.

[0037] The track support slabs have, in particular, at least one grouting opening through which the grouting compound can be poured in its unhardened state and introduced into the area between the base course and the lower surface of the track support slab. The track support slabs are, in particular, monolithic track support slabs.

[0038] Preferably, the track support slabs are elastically mounted. The elastic mounting can be achieved, at least in part, by the elasticity of the asphalt base course.

[0039] If necessary, an elastic layer is provided between the track support plates and the grout for elastic support and, in particular, for elastic decoupling of the track support plates.

[0040] To create a track layout, prefabricated track support plates are preferably aligned with the subsoil in a first step. The subsoil is usually a foundation following the track alignment or a load-bearing layer, preferably made of or comprising asphalt. Alignment is generally achieved by holding the support plates at a distance from the subsoil using adjusting elements, such as threaded bolts. Adjusting these adjusting elements, particularly the threaded bolts, allows for tilt adjustment and alignment of the support plates with the subsoil.

[0041] Subsequently, the gap between the subsoil and the track support plates is filled with a grout. The track arrangements preferably utilize an elastic mounting of the support plates relative to the grout.

[0042] To create a positive-locking connection between the track support plates and the potting compound, a positive-locking arrangement is preferably provided for each track support plate. According to a preferred embodiment, the positive-locking arrangement in the area of ​​a track support plate comprises two positive-locking elements that are in positive-locking operative contact. The support plate includes, as the first positive-locking element, an opening that is filled by the potting compound, with the potting compound forming a second positive-locking element in the area of ​​the opening. The opening of the track support plate preferably runs substantially vertically and may extend as a through-opening through the entire track support plate. Particularly in this embodiment, the opening can also synergistically serve as a potting opening for introducing the curing potting compound.

[0043] In order to achieve the described decoupling also in the area of ​​the positive locking arrangement, the support plate is preferably also provided with the elastic layer in this area.

[0044] This configuration creates a positive-locking connection, in particular a horizontally acting positive-locking connection, which, however, exhibits a certain elasticity or stiffness.

[0045] Preferably, the track support plates are essentially rectangular. A track support plate has, in particular, at least 4 rail supports or at least 2 sleeper axes, each with 2 rail supports.

[0046] A rail support point within the meaning of the present invention is in particular a fastening area or a fastening means for a rail.

[0047] The base course may be wider than the grout in the transverse direction of the track. This allows the base course to extend laterally beyond the grout, creating a base course overhang. The width of the track support slab may be designed to correspond to the width of the grout in the transverse direction of the track. The track support slab, base course, and grout run essentially parallel to each other. The base course overhang may be arranged on both sides of the grout and / or the track support slab.

[0048] The base course overhang, or the surface of the base course in the area of ​​the overhang, is covered, in particular, by a surface course. The surface course may have a slope running towards the outer edge of the track layout. This allows for efficient drainage of water from the track layout. In particular, the slope may originate from a central area of ​​the track layout.

[0049] The "surface" of the base course refers specifically to the uppermost surface of the base course, or the surface extending from one upper outer edge to the opposite upper outer edge of the base course in relation to the width of the track layout. This definition also applies, where applicable, to the "surface" of other elements, unless otherwise specified.

[0050] In connection with the present invention, unless otherwise specified, "width" means in particular that dimension of an element or object which extends transversely to the track extension and in a horizontal direction.

[0051] To improve the drainage of the liquid, the surface layer can have a water-repellent surface and in particular be made of mastic asphalt with a closed-pore surface or an asphalt surface layer.

[0052] In particular, the base course and surface course are two separate layers, optionally with different compositions. The base course performs the load-bearing function for transferring the load beneath the tracks, while the surface course is a layer situated above the base course. This layer is exposed to UV radiation and rainwater and protects the base course from these elements. The surface course can be a wear layer, meaning it can be removed from the base course. This allows for separate renewal of the surface course if necessary.

[0053] The surface course can be removed from the base course and thus designed as a wear layer. This allows the surface course to be renewed without interfering with the base course, so that railway operations are only minimally disrupted during surface course renewal.

[0054] If necessary, damage to the base layer that occurs during the renewal of the surface layer can be eliminated by applying the new surface layer without an additional work step.

[0055] The base course may have an open-pored and rough surface. This allows the grout to penetrate the pore structure of the base course during track assembly, resulting in interlocking of the grout with the base course. This is advantageous because it may eliminate the need for additional bonding agents to reinforce the bond between the grout and the base course and to achieve horizontal load transfer between the grout and the base course. In particular, a transition layer is formed between the base course and the grout, enabling the dissipation of lateral forces. This eliminates the need for otherwise common methods of connecting or interlocking the base course and the grout, such as steel dowels.

[0056] In particular, the surface roughness of the base layer is designed or selected such that the coefficient of friction between the base layer and the grouting compound is µ ≥ 0.6, especially µ ≥ 0.7, preferably according to EN 1992-1-1. Such a coefficient of friction can be achieved, for example, by milling grooves into the base layer. These grooves can have a width of approximately 5 mm, a depth of approximately 5 mm, and a groove-to-groove spacing of approximately 5 cm.

[0057] The surface of the base course itself does not need to have a slope; in fact, the surface of the base course is typically a rough surface. Such level surfaces can be produced particularly easily with conventional asphalt pavers, and the requirements for production accuracy can be low. The grout decouples the accuracy of the track alignment from the production accuracy of the asphalt, and inaccuracies in the production of the base course can be compensated for by the grout without an additional work step and without increased requirements for adjustment at the track support. In particular, this design allows tolerances in the production of the base course of 5 mm or greater.

[0058] If necessary, the surface, i.e., the upper surface, of the grout may have a slope running towards the outer edge of the track arrangement. This allows drainage to occur even through the grout.

[0059] The surfaces of the top layer and the grout may have a slope, and these surfaces may form a drainage area. Such a drainage area is, in particular, a continuous surface from which liquid can run off to the outer edge.

[0060] If necessary, a drainage area is provided that runs along the surface of the grout and the surface course. In particular, a drainage layer may be provided that includes both the surface course and the grout. The drainage layer may have a thickness of at least 2 cm and / or completely cover the base course. This protects the base course from water ingress and thus frost damage, as well as from UV radiation and thus aging. The surface course acts as a wear layer, exposed to frost and UV radiation, without compromising the dimensional stability and load-bearing capacity of the base course, thus ensuring long-term track stability.

[0061] In one embodiment, a pair of tracks or a track support slab is provided on a superstructure and / or on a base course with respect to the transverse direction of the track alignment. In this case, a base course overhang is provided on both sides of the track support slab, extending laterally from the grout to the corresponding outer edge of the base course. The central area of ​​the track arrangement then typically runs in the central region of the track, causing the slope of the surface course, which can be arranged on both sides of the grout, to decrease towards the outer edge of the base course. A surface course extending from the grout to the upper outer edge of the base course can be referred to as the outer surface course.

[0062] In a further embodiment, at least two adjacent track support plates are provided on a superstructure or on a base course with respect to the transverse direction of the track, thus enabling the provision of two or more parallel tracks. In this case, a base course overhang is also provided, particularly on both sides of the grout, but the central area of ​​the track arrangement may extend along a base course overhang. The surface course may then have a crest running along the central area, with the slope on both sides of the crest decreasing towards the outer edge of the base course. A surface course extending from one grout to another adjacent grout in the transverse direction of the track may be provided as an inner surface course.

[0063] Since the base course may contain UV-sensitive components, UV protection may be necessary. This can be achieved either through the surface course and the grout, or by backfilling with loose aggregate, particularly crushed stone. The sides of the base course, which may extend from the outer top edge to the outer bottom edge, may be covered with loose aggregate. The sides of the base course may be inclined, so that the width of the base course, measured transversely to the track from one outer bottom edge to the opposite outer bottom edge, may be greater than the corresponding width measured from the outer top edge to the opposite outer top edge.In particular, the base course may have a sloping flank that is not covered by the top layer, but for example by unbound rock granules.

[0064] If necessary, an elastomer layer, which may consist of elastomer granules, is placed between the track support slab and the grouting compound. This feature allows for easy dismantling, as the track support slabs can be easily detached from the asphalt base course after the track assembly has reached the end of its service life. The use of a release agent between the grouting material and the elastomer layer can further simplify this removal process. In this way, undamaged track support slabs can be reused. Furthermore, the elastomer layer can compensate for any stress differences that may arise from temperature-related deformation of the asphalt base course.

[0065] If necessary, an elastomer layer between the track support plate and the casting compound can be omitted.

[0066] The load-bearing layer may be arranged on a base course. The base course may comprise or consist of unbound aggregate. In particular, the base course may be a frost protection layer, designed, for example, according to RVS 08.15.01 or the German guideline for the standardization of the pavement structure of traffic areas (RStO).

[0067] The present invention may also relate to a method for forming a track arrangement. Such a method may optionally comprise the following steps: (a) forming an asphalt base course, (b) providing one or more track support plates, (c) positioning the track support plates relative to a base course, and (d) grouting with a hardening grout. In step (c), the track support plates are not placed directly onto the base course, but a gap is left which is subsequently filled with the grout. This allows for the compensation of manufacturing tolerances in the formation of the base course.

[0068] The process may include the step of applying the top layer to the base layer. This step may be carried out before grouting with the grout.

[0069] If necessary, the base layer is roughened before the track support plates are positioned, in particular by milling with a milling device. For example, grooves can be milled into the surface.

[0070] The invention may further relate to a method for renewing a track arrangement according to the invention, comprising the steps (a) removing the surface layer from the base course protrusion, in particular while retaining the base course and grout, and (b) covering the base course protrusion with a surface layer that is impermeable to water and consists of or comprises asphalt, wherein the surface of the surface layer is provided with a slope in the transverse direction of the track, draining outwards in the transverse direction of the track. This enables a particularly resource-efficient renewal and minimizes disruption to traffic operations.

[0071] Also described is a track layout system comprising at least a first track layout and a second track layout. The first track layout can be a track layout with an asphalt base course, as described above. The second track layout can be a conventional track layout of a slab track, particularly with a ballastless superstructure. The base layer of the second track layout, on which the base course rests, can be designed in the form of a known trough structure.

[0072] When slab pavement systems with asphalt base courses are installed, a connection to existing slab pavement systems, which often have a conventional structure with concrete base courses and / or hydraulically bound base courses on a gravel-free superstructure, may be necessary.

[0073] Compared to systems with concrete base courses and / or hydraulically bound base courses, especially those on ballastless pavements, slab pavement systems with asphalt base courses, particularly those using unbound aggregate as a base course, exhibit different mechanical properties. These are due, for example, to differences in the elasticity of the materials used, their strength, or their thermal expansion.

[0074] A further object of the invention may therefore be to provide a suitable transition between these two systems.

[0075] If necessary, the track arrangement system includes a transition track arrangement located between the first track arrangement and the second track arrangement, which compensates for the differences in characteristics between the two track arrangements to be connected.

[0076] Optionally, the second track arrangement is a track arrangement of a slab track with a ballastless superstructure for forming a track for rail-bound traffic, comprising: (a) several prefabricated track support slabs made of reinforced concrete, in particular of conventionally reinforced concrete, (b) a grout cast and hardened between the aligned track support slabs and a base course, and (c) several rail supports provided on the track support slabs for fastening the rails. Optionally, the base course of the second track arrangement is a hydraulically bound base course.

[0077] The transition track arrangement may be a track arrangement of a slab track for forming a track for rail-bound traffic, comprising: (a) several prefabricated track support slabs made of reinforced concrete, in particular of conventionally reinforced concrete, (b) a grout cast and hardened between the aligned track support slabs and a base course, and (c) several rail supports provided on the track support slabs for fastening the rails. The base course of the second track arrangement may be a concrete base course.

[0078] In particular, the first track arrangement, second track arrangement and transition track arrangement include the same track support plates and / or the same grout.

[0079] If necessary, the base layer on which the load-bearing layer of the transition track arrangement is placed comprises rock granules that are partially bound with binder.

[0080] The transition track arrangement may comprise several sub-areas, which differ particularly in terms of the design of the load-bearing layer and the base layer.

[0081] If necessary, a base course of asphalt and a base layer of partially binder-bound rock granules may be provided in a first area adjoining the first track arrangement.

[0082] If necessary, a second area adjoining the first area may include a load-bearing layer made of concrete, in particular a concrete base layer, and a base layer made of partially bound rock granules.

[0083] If necessary, a third area adjoining the second area may include a concrete base course, in particular a concrete base course, and a gravel-free base course, in particular made of fully bound material.

[0084] If necessary, the second track arrangement can connect to the third area.

[0085] At the transition between the first track arrangement and the transition track arrangement, the base layer of the transition track arrangement may be wedge-shaped or have a wedge-shaped feature. The wedge may project into the base layer of the first track arrangement, and may have an inclination that runs towards the load-bearing layer. In particular, the wedge or the inclined wedge surface extends to the load-bearing layer. If necessary, the height of the portion of the base layer consisting of aggregate partially bonded with binder decreases in the area of ​​the wedge towards the load-bearing layer. The wedge surface may be inclined at an angle of between 1:1 and 1:3 towards the load-bearing layer.

[0086] The wedge-shaped design of the base layer prevents or reduces, for example, differences in settlement and elasticity between the track arrangements.

[0087] The base layer of the transition track arrangement is primarily composed of cement-consolidated rock granules.

[0088] If necessary, it is provided that the rails are continuous and / or one-piece for at least 10 m, preferably at least 15 m, from the transition of the third area to the second track arrangement and in particular have no weld points.

[0089] If necessary, dowels are provided in the transition track arrangement for the connection, in particular a form-fitting connection, between the base layer and the load-bearing layer.

[0090] If necessary, an intermediate element in the form of an elastic intermediate mat is provided in the transition track arrangement, in particular between the second and third area, the width of which corresponds to the width of the track support plates.

[0091] If necessary, the transition between the second area and the third area forms a transition between an earthwork and a trough structure.

[0092] Further features of the present invention will become apparent from the claims, the figures and the following description of exemplary embodiments of the present invention.

[0093] This shows: Fig. 1 a schematic sectional view of a track arrangement according to the invention in a transverse direction to the track alignment according to an exemplary embodiment; Fig. 1a a detailed view of part of Fig. 1 ; Fig. 2 A schematic sectional view of a track layout system in the longitudinal direction to the track alignment according to an exemplary embodiment.

[0094] Unless otherwise specified, the reference numerals in the figures denote the following components: rail 1, track support plate 2, base course 3, base course of the second track arrangement 3', base course of the transition track arrangement 3", grout 4, rail support 6, base course overhang 7, surface course 8, surface of the surface course 9, central area 10, surface of the base course 11, outer surface course 12, inner surface course 13, drainage layer 14, second surface course 15, joint compound 16, drainage layer 17, base course 18, surface of the grout 19, crown 20, outer top edge of the base course 21, joint 22, elastomer layer 23, first track arrangement 24, second track arrangement 25, transition track arrangement 26, first area 27, second area 28, third area 29, intermediate element 30, grout opening 31, ballast 32, flank of the base course 33, outer lower edge of the base course 34, wedge-shaped area 37, wedge surface 38.

[0095] Fig. 1 shows a sectional view of a track arrangement according to the invention in the transverse direction to the track alignment according to an embodiment of the present invention. Fig. 1a shows a detailed view of a section of the Fig. 1 For the sake of simplicity, the two figures will be described together below.

[0096] The track arrangement comprises two parallel and spaced-apart track support plates 2 in the transverse direction, which have rail supports 6 to which rails 1 are attached. The rails 1 run along the longitudinal direction of the track arrangement.

[0097] The track support plates 2 are arranged on a base course 3, which in this embodiment is made of asphalt with an open-pored and coarse-grained surface 11. The connection between the track support plates 2 and the base course 3 is made by a grout 4 comprising a set or hardened hydraulic binder. During the construction of the track assembly, the grout 4, in its unhardened state, is injected through the grouting openings 31 between the underside of the track support plates 2 and the surface 11 of the base course 3.

[0098] The open-pored and rough surface 11 of the base layer 3 allows unconsolidated grout 4 to penetrate the structure of the base layer 3, resulting in an improved bond between the two layers. In this embodiment, the thickness of the base layer 3 is approximately 30 cm.

[0099] In the Fig. 1 und Fig. 1a In the illustrated embodiment, an elastomer layer 23 made of elastomer granules is arranged between the casting compound 4 and the track support plate 2. This elastomer layer 23 can compensate for stresses that may arise due to temperature-related deformations of the support layer 3. Furthermore, the elastomer layer 23, optionally in conjunction with an additional release agent, can facilitate easier recycling of the track support plates 2, as they can be easily detached from the casting compound 4.

[0100] In an embodiment not shown, however, no elastomer layer 23 may be provided between the potting compound 4 and the track support plate 2.

[0101] In the transverse direction of the track extension, the width of the track support plates 2 essentially corresponds to the width of the grout 4. In contrast, the width of the support layer 3 is greater than the width of the grout 4 and the track support plate 2, or, in the case of this embodiment, greater than the combined width of the two adjacent track support plates 2 or grout 4s. This creates a support layer overhang 7 that extends on both sides of the grout 4.

[0102] Since water can penetrate the open-pored surface 11 of the base course 3 in the area of ​​the base course overhang 7, which promotes frost damage, the surface 11 of the base course 3 in the area of ​​the base course overhang 7, i.e., the area that is not covered by grout 4, is covered by a top layer 8, which in this embodiment is asphalt with a smooth and closed-pored surface 9.

[0103] In this embodiment, a distinction is made between the outer cover layer 12, which extends between the casting compound 4 and the outer upper edge 21 of the support layer 3, and the inner cover layer 13, which extends between the two adjacent casting compounds 4.

[0104] The surface layers 8 have a slope that runs from the central area 10 of the track arrangement towards the outer upper edge 21 of the base layer 3. This facilitates water runoff. In this embodiment, the slope of the outer surface layer 12 is approximately 4%, and that of the inner surface layer 13 is approximately 1%. It should be noted that in this embodiment, the inner surface layer 13 has a slope that descends in two directions. This creates a crest 20 along the inner surface layer, which runs along the central area 10 of the track arrangement. Thus, a slope is provided on both sides of the crest 20.

[0105] In the area of ​​the casting compound 4, the height of the respective cover layer 8 essentially corresponds to the height of the casting compound 4, so that a continuous surface is formed from the apex 20, across the surface 9 of the inner cover layer 13, across the surface 19 of the casting compound 4, to the surface 9 of the outer cover layer 12. In this embodiment, the surface 19 of the casting compound 4 also has a slope starting from the central area 10, which here is approximately 1%. The continuous surface thus also has a continuous slope, forming a drainage surface.

[0106] An elasto-plastic joint sealant 16 is arranged between the outer top layer 12 and the grout 4. However, this sealant does not extend to the base of the outer top layer 12 or to the surface 11 of the base layer 3, so as not to impair the liquid-sealing effect of the top layer 8.

[0107] The inner surface layer 13 is covered by a drainage layer 14 made of unbound aggregate, which in turn is covered by a second surface layer 15. Like the other surface layers 8, the second surface layer 15 is made of asphalt with a closed-pore and smooth surface. Furthermore, the second surface layer 15 also has a slope that descends on both sides of a crest 20.

[0108] A drainage layer 17 in the form of a drainage mat is arranged laterally between the inner surface layer 13, the drainage layer 14, and the second surface layer 15. The drainage layer 17 is located specifically between the aforementioned layers and the track support slab 2 and the grout 4, without extending to the surface 11 of the base layer 3. This allows liquid running off the slope of the second surface layer 15 to seep down to the surface 9 of the inner surface layer 13 and from there drain away via the drainage surface towards the outer top edge 21 of the base layer 3.

[0109] In the transverse direction of the track alignment, the width of the base course 3, measured from one outer upper edge 21 to the opposite outer upper edge 21, is smaller than its width, measured from one outer lower edge 34 to the opposite outer lower edge 34. As a result, the base course 3 has a sloping flank 33 that is not covered by the surface course 8. To protect against environmental influences, especially UV radiation, a layer of ballast 32 is provided in the area of ​​the flank 33.

[0110] In this embodiment, the track arrangement is specifically designed as an earthwork structure, with the base layer 18 arranged beneath the load-bearing layer 3 consisting of unbound aggregate, particularly in the form of a frost protection layer. The thickness of the frost protection layer in this embodiment is approximately 60 cm. However, the track arrangement can also be implemented on a bridge, a trough structure, or a tunnel, in which case a concrete slab or a hydraulically bound load-bearing layer may be used instead of the frost protection layer.

[0111] In a method for forming such a track arrangement, the track support plates 2 are provided and then positioned in the desired location. Unhardened grout 4 is then introduced through the grout openings 31, which then hardens to fix the position of the track support plates 2. The grout 4 thus allows for compensation of manufacturing tolerances in the base course 3, which can therefore be laid using a conventional method known in road construction, without requiring particularly tight manufacturing tolerances. This method differs from conventionally used methods for forming track arrangements with asphalt base courses, in particular by the fact that the track support plates or sleepers are not directly supported on the base course.

[0112] Fig. 2 shows a sectional view of a track arrangement according to the invention in the longitudinal direction to the rail alignment according to an embodiment of the present invention. Fig. 2 is the track layout as in Fig. 1 Shown is part of a track layout system. For better illustration, it is shown Fig. 2 Sections of the track layout shortened by fracture edges.

[0113] The track layout from Fig. 1 A first track arrangement 24 is connected to a second track arrangement 25 by a transition track arrangement 26. The second track arrangement 25 is constructed in a conventional manner with a base layer 18' in the form of a trough structure, and the load-bearing layer 3' of the second track arrangement 25 is a hydraulically bound load-bearing layer in a known manner.

[0114] The track support plates 2 and the grout 4 are identical across the entire track arrangement system, and the rails 1 are connected to the track support plates 2 via rail supports 6 in a known manner.

[0115] The in Fig. 2 The track arrangement system shown forms, in particular, a transition between the second track arrangement 25, which is constructed with ballastless superstructure, and the first track arrangement 24 according to the invention, and serves, for example, to compensate for differences in elasticity of the materials and structures used. In detail, the transition track arrangement 26 forms a connection between the trough structure of the second track arrangement 25 and the earthwork of the first track arrangement 24.

[0116] In this embodiment, the transition track arrangement 26 is divided into three sections. In the first section 27, which adjoins the first track arrangement 24, the asphalt base course of the first track arrangement 24 continues as a base course 3". The base course 18" in the first section 27, however, is partially compacted aggregate that has been partially compacted with cement. In the second section 28, which adjoins the first section 27, the base course 18" of the first section 27 continues, while the base course 3" changes to a concrete base course. In the third section 29, which adjoins the second section 28, the base course 3" of the second section 28 continues, but the base course 18" changes to a ballastless base course in the form of a trough structure.Finally, the second track arrangement 25 connects to the third area 29, whereby the base layer 18' does not change compared to the base layer 18" of the third area 29, but the load-bearing layer 3' is a hydraulically bound load-bearing layer.

[0117] At the transition from the second area 28 to the third area 29, an intermediate element 30 is provided between the base layer 18" and the load-bearing layer 3", which is designed in the form of an elastic intermediate mat. The transition between the second area 28 and the third area 29 forms, in particular, the transition between the earthwork and the trough structure.

[0118] At the transition between the base layer 18 of the first track arrangement 24 and the base layer 18" of the transition track arrangement 26, a wedge-shaped area 37 of the base layer 18" is provided. The wedge-shaped area 37 projects into the base layer 18 of the first track arrangement, with a wedge surface 38 being provided which is inclined towards the load-bearing layer 3". In this embodiment, the inclination is approximately 1:2.

[0119] In Fig. 2 It can also be seen that a joint 22 is formed between successive track support plates 2 in the longitudinal direction of the track, which in this embodiment has a width of about 4 cm.

[0120] To improve the stability of the track arrangements, no welding of rails takes place approximately 15 m before and after the transition between the second area 28 and the third area 29.

Claims

1. A track assembly of a slab track system for forming a track for rail-bound traffic, comprising: - multiple prefabricated track slabs (2) made of reinforced concrete, in particular untensioned reinforced concrete, - a casting compound (4) that is cast and hardened between the track slabs (2), which are aligned in their position, and a base layer (3), - multiple rail support points (6) provided on the track slabs (2) for securing the rails (1), - wherein the base layer (3) consists of or comprises asphalt, and - wherein the base layer (3) projects laterally beyond the casting compound (4) in the transverse direction of the course of the track, such that a base layer projection (7) is formed, characterised in that - the base layer projection (7) is covered by a cover layer (8), which is water-impermeable and consists of or comprises water-impermeable asphalt, and - the surface (9), meaning the top face, of the cover layer (8) has a downward slope enabling outward drainage in the transverse direction of the course of the track.

2. The track assembly according to claim 1, characterised in that a drainage surface (16) is provided, which runs continuously along the surface (9) of the cover layer (8) and along the surface (19), meaning the top face, of the casting compound (4), the drainage surface (16) being formed, in particular, by a layer comprising the cover layer (8) and the casting compound (4) and having a thickness of at least 2 cm.

3. The track assembly according to any one of claims 1 or 2, characterised - in that the surface (11), meaning the top face, of the base layer (3) is a flat surface - and / or in that the surface (11) of the base layer (3) is a surface formed by an asphalt finisher with a tolerance of at least 0.5 cm from the nominal height, in particular between 0.5 cm and 1 cm from the nominal height.

4. The track assembly according to any one of claims 1 to 3, characterised in that in the transition area from the base layer (3) to the casting compound (4) a transition layer is provided, in which the casting compound (4) is infused into the base layer (3) and, in the hardened state, protrudes into the base layer (3), the transition layer having, in particular a thickness of at least 5 mm.

5. The track assembly according to any one of claims 1 to 4, characterised in that the roughness of the surface (11) of the base layer (3) is selected or designed in such a way that the coefficient of friction between the base layer (3) and casting compound (4) is µ ≥ 0.6, in particular µ ≥ 0.7, in accordance with EN 1992-1-1.

6. The track assembly according to any one of claims 1 to 5, characterised in that the cover layer (8) has a water-draining and / or water-repellent surface (9).

7. The track assembly according to any one of claims 1 to 6, characterised in that the cover layer (8) is configured as closed-pore mastic asphalt.

8. The track assembly according to any one of claims 1 to 7, characterised in that - an outer cover layer (12) is provided, which is arranged between the casting compound (4) and the outer top edge (21) of the base layer (3) or extends from the casting compound (4) to the outer top edge (21) of the base layer (3), - wherein optionally it is provided that an elasto-plastic joint sealant (16) is arranged between the outer cover layer (12) and casting compound (4), the joint sealant (16) extending from the surface (9) of the outer cover layer (12) towards the base layer (3), but terminating before the surface (11) of the base layer (3).

9. The track assembly according to any one of claims 1 to 8, characterised in that the track assembly comprises two track slabs (2) each having associated casting compounds (4) arranged adjacent to one another in the transverse direction of the course of the track, and that an inner cover layer (13) is provided, which is arranged between the casting compounds (4) of the two neighbouring track slabs (2), the inner cover layer (13) having a downward slope in the direction of the course of the track, wherein optionally it is provided that the inner cover layer (13) has a crest (20) which runs along the centre area (10) of the track assembly, and that the downward slope is provided on both sides of the crest (20).

10. The track assembly according to any one of claims 1 to 9, characterised in that the cover layer (8) is removable from the base layer (3).

11. The track assembly according to any one of claims 1 to 10, characterised in that the base layer (3) is arranged on a sub-base layer (18), which is formed of or comprises unbound rock aggregate, that the sub-base layer (18) is a structure or that the sub-base layer (18) is a hydraulically bound base layer.

12. The track assembly according to any one of claims 1 to 11, characterised - in that the track assembly comprises at least two track slabs (2) arranged consecutively in the longitudinal direction of the course of the track, with a joint (22) being provided between each two consecutive track slabs (2), the width of the joint (22) being at least 1 cm, - and / or in that an elastomer layer (23), in particular comprising elastomer granulate, is arranged between the track slab (2) and the casting compound (4).

13. A method for forming a track assembly according to any one of claims 1 to 12, comprising the steps of: a. forming a base layer (3), consisting of or comprising asphalt, b. positioning the track slabs (2) along the base layer (3), wherein the track slabs (2) are positioned at a distance from the base layer (3) such that a clearance between the track slabs (2) and the base layer (3) is formed, and c. casting the clearance with unhardened casting compound (4), wherein the base layer (3) projects laterally beyond the casting compound (4) in the transverse direction of the course of the track, such that a base layer projection (7) is formed, wherein the base layer projection (7) is covered by a cover layer (8), which is water-impermeable and consists of or comprises asphalt, and wherein, in the transverse direction of the course of the track, the surface (9) of the cover layer (8) has a downward slope enabling outward drainage in the transverse direction of the course of the track.

14. The method according to claim 13, characterised in that prior to the positioning of the track slabs (2), the base layer (3) is roughened, in particular by milling with a milling device.

15. A method for rehabilitating a track assembly according to any one of claims 1 to 12, comprising the steps of: a. removing the cover layer (8) from the base layer projection (7), in particular while maintaining the base layer (3) and the casting compound (4), and b. covering the base layer projection (7) with a cover layer (8), which is water-impermeable and consists of or comprises asphalt, wherein in the transverse direction of the course of the track, the top surface (9) of the cover layer (8) is provided with a downward slope enabling outward drainage in the transverse direction of the course of the track.

Images