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
  • E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
  • E01B1/007—Ballastless track, e.g. concrete slab trackway, or with asphalt layers with interlocking means to withstand horizontal forces
• • 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
• • 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
  • E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
  • E01B1/004—Ballastless track, e.g. concrete slab trackway, or with asphalt layers with prefabricated elements embedded in fresh concrete or asphalt

Definitions

• the invention relates to a railway track construction, comprising a concrete road bed that is underpinned with respect to a substrate, a series of track slabs seated on the road bed and positioned one after the other, rails supported by the track slabs, as well as a separation layer situated between the roadbed and the track slabs, which road bed and track slabs are stabilised at least with respect to one another by first interlocking shapes that prevent relative movements of the road bed and the track slab along the separation layer transversely with respect to the railway ttack.
• a railway track construction is disclosed in US-A 3 907200.
• the track slabs of this known railway track construction are confined on both sides in a concrete trough.
• the separation layer in this case runs from underneath the track slabs upwards along the longitudinal sides thereof and thus forms part of the transverse confinement of the track slabs.
• a stud projects upwards from the bed rentiaUy into me track slabs, by means of which stud the track slabs are stabilised both in the transverse direction and in the longitudinal direction.
• Such a railway track construction has the disadvantage that the track slabs cannot be kept sufficiently accurately oriented in, for example, routes where trains run at high speed. As a result of the confinement in the transverse direction where the separation layer plays a role, it is possible that rotation, however, minor, occurs around the stud. However, some play in the transverse confinement cannot be avoided, since otherwise the track slabs would not have sufficient room for expansion in the case of temperature changes.
• the aim of the invention is therefore to provide a railway track construction that does not have these disadvantages. Said aim is achieved in that the first interlocking shapes permit relative movements of the road bed and the track slab along the separation layer in the longitudinal direction of the railway track.
• the separation layer for example a geotextile layer, affords robust, dimensionally stable support for the track slabs and the rails, while, on the other hand, a certain degree of settlement remains possible in the longitudinal direction of the railway track. No trough- shaped construction is necessary to be able to position the track slabs accurately in the transverse direction, whilst nevertheless there is the possibility for expansion in the longitudinal direction.
• the road bed can be provided with upright studs
• the track slab can be provided with recesses that open out on the underside of the track slab, in which recesses one stud is accommodated in each case.
• the width of the studs is approximately the same as the width of the recesses.
• the dimension of the recesses viewed in the longitudinal direction of the railway track can be larger than the corresponding dimension of the stud. Ia the nominal state the recess surrounds the associated stud with some clearance both at the front and at the back.
• each stud can comprise a metal pin mat is made with two pai ⁇ el usnsversefiu ⁇ s andcanbe sunoundedbyadiscmatrests oiimeroadbed.
• each recess is defined by a cap that is incorporated in the track slab.
• This cap can comprise a metal sleeve as well as a flexible cover that is located at the end of the sleeve that is embedded in the track slab.
• a flexible ring can be situated between the cover and the end of the sleeve. This ring is intended to prevent the metal sleeve from being pushed through the layer of concrete above and, as it were, perforating this under the effect of the loading forces that are exerted on the track slab by the railway traffic.
• each track slab and the road bed can be stabilised with respect to one another by second interlocking auxiliary shapes that interlock with no clearance both in the longitudinal direction and in the transverse direction.
• These auxiliary shapes are preferably located in the central region of the track slab.
• the interlocking shapes with clearance are located more towards the longitudinal ends of the track slab.
• Figure 1 shows a plan view of a railway track construction according to the invention.
• Figure 2 shows a cross-section according to II-II in Figure 1.
• Figure 3 shows a detail of a stud with cap such as used in the railway track construction according to the invention.
• Figure 4 shows the section according to IV-IV according to Figure 3.
• Figure S shows a fixed stud.
• the railway track construction shown in Figure 1 comprises a concrete road bed 1, on which the track slabs indicated in their entirety by 2 are arranged one after the other. These track slabs 2 do not lie directly against one another but enclose gaps 3.
• the rails 4 are fitted above the track slabs. These rails 4 ate seated with bearers 5 in Ae concrete that forms the track slabs 2 in the known manner.
• the track slabs 2 are stabilised with respect to Uae ioad bed 1 by means of stabilising means indicated in their entirety by 5 that permit relative movements between the track slab and the road bed l in the longitudinal direction, but resist these in the transverse direction. Furthermore, mere are stabilisation means 6 that resist relative movements of the track slabs 2 and the road bed 1 in all directions.
• a stabilisation means S is shown in vertical section in Figure 3.
• This stabilisation means comprises the stud indicated in its entirety by 8, the lower cylindrical end 9 of which is rigidly incorporated in the concrete of the road bed 1.
• the upper end 10 adjoining this has, as is shown in the section in Figure 4, two opposing flat side faces 11 that are in contact with the corresponding walls of the cap indicated by 12.
• This cap is incorporated in the concrete ofthe track slab 2 concerned.
• the cap 12 is elongated in section such that the curved surfaces 13 ofthe upper part 10 ofthe stud 8 are at a distance from the related walls ofthe cap 12.
• the space arising as a consequence of this is filled with an elastic medium, for example polyurethane foam 14.
• an elastic medium for example polyurethane foam 14.
• the elastic filler such as polyurethane foam, allows relative movement ofthe track slab with respect to the road bed in the longitudinal direction.
• the cap 12 comprises a metal sleeve 1 S, which is capped at the top by a plastic cover.
• a stabilisation means 6 mat consists of a completely cylindrical, prismatic stud 17 is shown in Figure 5. This stud 17 is rigidly incorporated in the concrete ofthe road bed 1 and is also rigidly incorporated in the concrete ofthe track slab 2.
• a rubber cap 18 with an elastic ring 19 underneath it is placed on the top of the stud 17. This cap 18 and ring 19 are intended to counteract perforation ofthe concrete ofthe track slab 2 located above the stud 17.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Road Paving Structures (AREA)
• Railway Tracks (AREA)
• Bridges Or Land Bridges (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (2)

Family

ID=34979474

Family Applications (1)

Country Status (8)

Cited By (2)

Families Citing this family (3)

Citations (2)

Family Cites Families (2)

• 2005
  • 2005-02-16 NL NL1028299A patent/NL1028299C2/nl not_active IP Right Cessation
• 2006
  • 2006-02-10 ES ES06716657T patent/ES2327674T3/es active Active
  • 2006-02-10 DE DE602006006550T patent/DE602006006550D1/de active Active
  • 2006-02-10 WO PCT/NL2006/050023 patent/WO2006088366A2/en active Application Filing
  • 2006-02-10 EP EP06716657A patent/EP1853764B1/de not_active Not-in-force
  • 2006-02-10 AT AT06716657T patent/ATE430218T1/de not_active IP Right Cessation
  • 2006-02-10 KR KR1020077020649A patent/KR20070120496A/ko not_active Application Discontinuation
  • 2006-02-16 CN CNA2006100673543A patent/CN1821489A/zh active Pending

Patent Citations (2)

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