US20230095797A1 - Support for railway track rails - Google Patents

Support for railway track rails Download PDF

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Publication number
US20230095797A1
US20230095797A1 US17/906,046 US202117906046A US2023095797A1 US 20230095797 A1 US20230095797 A1 US 20230095797A1 US 202117906046 A US202117906046 A US 202117906046A US 2023095797 A1 US2023095797 A1 US 2023095797A1
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United States
Prior art keywords
protective sheathing
support
peripheral wall
faces
railway track
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Pending
Application number
US17/906,046
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English (en)
Inventor
Boris MOUSSU
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Individual
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Individual
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Assigned to BARET reassignment BARET ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MOUSSU, Boris
Publication of US20230095797A1 publication Critical patent/US20230095797A1/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B3/00—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails
    • E01B3/46—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from different materials
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2204/00—Characteristics of the track and its foundations
    • E01B2204/01—Elastic layers other than rail-pads, e.g. sleeper-shoes, bituconcrete

Definitions

  • the object of the present invention is a support for railway track rails, in particular of the sleeper type, comprising a central core of parallelepipedal appearance formed of at least two juxtaposed slats made of solid wood or wood-based materials, and a protective sheathing coating the said central core, the said protective sheathing being made in one piece, and being formed of a peripheral wall having at least two opposite upper and lower faces and two opposite lateral faces, designed to fit at least the four longitudinal faces of the central core, as well as at least one internal partition extending between two opposite faces or two contiguous faces of said peripheral wall and delimiting with the peripheral wall of the protective sheathing at least two cells each having a shape complementary to a slat of said central core.
  • the rail supports also called track rails supports, concerned by the present invention, such as railway sleepers, bridge parts, engineering structure parts and timbers, participate in the construction of railway tracks, in which, once anchored in a ballast, in addition to serving as a support for the rails, are meant to ensure a constant distance between the latter and to distribute the mechanical loads on the ballast during the passage of a train.
  • creosote a protective substance such as creosote, intended to counteract biological attacks from xylophagous agents such as fungi and termites.
  • creosote is still authorized and used today, it is currently strongly contested because of its harmful effects on the environment and human health.
  • the constant evolution of the regulations to which the use of this substance is subject also suggests that it is destined to be phased out.
  • new chemical treatments proposed to replace creosote which still represent a source of environmental pollution, particularly for aquatic environments, and for which it has been observed that the authorizations for use may not be renewed.
  • Concrete rail supports are cost-effective, but they are heavy, complex to handle, and fragile due to their rigidity. In addition, they cannot be machined and require the ballast to be raised, which means additional costs. Finally, concrete railway track supports have a high carbon footprint.
  • Steel track supports have a long service life. However, they generate noise when trains pass by, which limits the areas where they can be used. Their high electrical conductivity and high maintenance costs, particularly because of the risk of corrosion, are also limiting.
  • track supports made of plastic or composite materials are, like those made of wood, machinable and recyclable, and absorb vibrations and therefore noise. Nevertheless, technical constraints remain, such as their dimensional variations, caused by the thermal expansion of their constituent material. In addition, the material may be subject to creep over time, which may compromise the pull-out strength of the lag bolts. Also, the cost of plastic or composite track supports is high, which is an additional obstacle to their deployment.
  • the purpose of the present invention is to propose a support for railway track rails, such as a railway sleeper, of the type consisting of a central core made of wood or wood-based materials covered with a protective sheathing, having an alternative structure to those already described, making it possible both to overcome all the disadvantages mentioned above and to improve its longevity regarding the effects of the weight of the trains travelling on the railways, while at the same time satisfying the technical, budgetary and environmental criteria currently in force. More precisely, the present invention aims to propose a machinable support for railway track rails, whose life span is extended compared to existing rail supports, which is environmentally friendly, and whose structure and constituent materials allow easy recycling.
  • said protective sheathing is made of plastic material.
  • said protective sheathing further comprises a pair of caps adapted to cover the left and right end faces of said central core.
  • the present invention has also provided that the upper face of said protective sheathing comprises at least two recesses extending symmetrically on either side of a plane passing through the center of said protective sheathing and extending perpendicular to its longitudinal axis.
  • the recesses have threaded holes.
  • the peripheral wall of said protective sheathing may have a structure forming a set of reliefs and recesses extending over at least a portion of the lower face of its peripheral wall.
  • the structure forming an array of reliefs and recesses may also extend over at least a portion of the opposite side faces of the peripheral wall of the protective sheathing, said portion extending from the lower face of the peripheral wall towards the upper face thereof.
  • the present invention has also provided the feature that said slats are each formed of a series of abutting strips.
  • said slats extend parallel to each other and parallel or perpendicular to the upper and lower faces of the peripheral wall of the protective sheathing.
  • FIG. 1 corresponds to a perspective view and in transparency of an embodiment of a support for rails according to the invention, defined here by a railway sleeper.
  • FIG. 2 is a perspective view of the central core of the railway sleeper of FIG. 1 .
  • FIG. 3 is a cross-sectional view of the railway sleeper of FIG. 1 , taken at an alignment of through-holes that the slats of the central core comprise, along one of their transverse edges.
  • FIG. 4 shows a partial side schematic view of the railway sleeper of FIG. 1 .
  • FIG. 5 is a cross-sectional view of a second embodiment of the support for railway track rails according to the invention.
  • FIG. 6 is a cross-sectional view of a third embodiment of the support for rails according to the invention.
  • the support for rails according to the invention is defined by a railway sleeper 1 comprising, on the one hand, a central core 2 of parallelepipedal appearance, and, on the other hand, a protective sheathing 4 enveloping said central core 2 .
  • the latter is formed here of four slats 3 , of thickness e, made of solid wood.
  • the slats 3 are each formed from a series of wooden strips, assembled for example by their respective lateral edges, or by their respective longitudinal edges or face to face after superposition.
  • the different slats 3 of the central core 2 may each be made from different types of wood.
  • a central core 2 comprising three inner slats of beech, sandwiched between two outer slats 3 of oak, a material which is by definition more durable and resistant than beech.
  • the protective sheathing 4 is advantageously in one piece, and is made of plastic or thermoplastic material, reinforced or not with fibers and/or talc, by means of a process known per se, such as, for example, a plastic injection, extrusion or “exjection” process (registered trademark).
  • the protective sheathing 4 is formed by a peripheral wall preferably having a thickness e 1 of between 5 mm and 15 mm. It has two opposite upper and lower faces 6 and 7 , and two opposite lateral faces 8 , 9 , designed to match at least the four longitudinal faces of said central core 2 , as well as two left and right end faces 11 , 12 , designed to cover the left and right end faces of the central core 2 .
  • the protective sheathing 4 also comprises three internal partitions 13 parallel to each other, extending between its two opposite lateral faces 8 , 9 , parallel to its upper 6 and lower 7 faces.
  • the internal partitions 13 have a thickness e 2 of between 3 mm and 10 mm and, together with the peripheral wall of the protective sheathing 4 , delimit four cells 14 each having a shape complementary to a slat 3 of the central core 2 .
  • each wooden slat 3 of which the central core 2 is made up is housed in an individual protective sheath, defined in each case by a cell 14 , and is thus completely separated from the other slats 3 .
  • an individual protective sheath defined in each case by a cell 14 .
  • the slats 3 have a plurality of through-holes 30 , formed through their thickness e, and, in the alternative embodiment shown in FIG. 2 , such that each through-hole 30 of a slat 3 is aligned with a corresponding through-hole 30 of the adjacent slat(s) 3 .
  • These through-holes 30 fill with the plastic or thermoplastic material used to encapsulate the slats 3 of the parallelepipedal core 2 with the protective sheathing 4 , during the manufacture of the railway sleepers 1 , for example by a plastic injection, extrusion or “exjection” process (trademark).
  • the slats 3 are therefore not only each encased in an individual protective sheath, but also connected to each other by pins 31 of plastic material filling the through-holes 30 . This last feature prevents the slats 3 from moving relative to each other within the protective sheathing 4 , particularly under the effect of the weight of trains travelling on the tracks.
  • the through-holes 30 are preferably aligned along the longitudinal edge 18 and the transverse edge 19 of each of the slates 3 and in such a way as to be located at a distance d 0 of between 5 mm and 40 mm from the longitudinal edge 18 , and at a distance d 1 of between 5 mm and 70 mm from their transverse edge 19 .
  • the through-holes 30 of a same slat 3 are regularly spaced apart, preferably by a distance d 2 of between 50 mm and 200 mm.
  • the upper face 6 of the protective sheathing 4 comprises two recesses 15 extending symmetrically on either side of a plane passing through the center of the protective sheathing 4 and extending perpendicular to its longitudinal axis X.
  • the two recesses 15 are, for example, machined and are each designed to accommodate a metal plate (not shown) for mounting a rail.
  • they are provided with threaded holes 16 , extending through the slats 3 and the internal partitions 13 of the protective sheathing 4 , intended to receive screws for fixing the metal plate in the recesses 15 .
  • each recess 15 has an inclination suitable for receiving a mounting plate in accordance with current French standards.
  • the bottom 17 of the recesses 15 could have an inclination different from that illustrated and extend horizontally, for example, in order to be able to accommodate other types of mounting plates.
  • the rail support according to the invention such as a railway sleeper 1
  • the rail support according to the invention defines an alternative solution to those existing to overcome the problems linked to the putrescible nature of the wood of which they were originally made.
  • the watertight protective sheathing 4 which covers the material of which the slats 3 are made makes it possible to preserve it and thus guarantees its durability in accordance with the regulations.
  • the rail support according to the invention is simple, economical and ecological to manufacture. It also has the advantage of a longer service life compared to known rail supports in the state of the art, independently of any use of potentially toxic and polluting substances.
  • FIGS. 1 to 3 other embodiments than the one illustrated in FIGS. 1 to 3 can also be provided.
  • a variant of a support for rails defining a railway sleeper 10 has been designed (see FIG. 4 ), in which the slats 3 form a central core 20 , extending parallel to each other and perpendicular to the upper 6 and lower 7 faces of the protective sheathing 4 .
  • the alternative embodiment shown in FIG. 4 is shown in which the slats 3 form a central core 20 , extending parallel to each other and perpendicular to the upper 6 and lower 7 faces of the protective sheathing 4 .
  • the railway sleeper 100 comprises a central core 200 having two groups of slats 3 extending parallel to each other and at an angle to the upper 6 and lower 7 faces of the protective sheathing 4 , the two groups being arranged symmetrically therein with respect to a plane passing through the center of the protective sheathing 4 and extending parallel to its longitudinal axis X, is also in accordance with the spirit of the present invention.
  • the protective sheathing 4 can be completed with a pair of caps (not illustrated) designed to cover the left 11 and right 12 end faces of the central core 2 , 20 , 200 .
  • the peripheral wall of the protective sheathing 4 can advantageously be designed in such a way that it has a structure forming a set of reliefs and recesses extending over at least a portion of its lower face 7 or even, where appropriate, from its lower face 7 in the direction of its upper face 6 , and also over at least a portion of its opposite lateral faces 8 , 9 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Railway Tracks (AREA)
  • Laminated Bodies (AREA)
  • Panels For Use In Building Construction (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Connection Of Plates (AREA)
US17/906,046 2020-03-19 2021-03-19 Support for railway track rails Pending US20230095797A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR2002703 2020-03-19
FR2002703A FR3108344B1 (fr) 2020-03-19 2020-03-19 Support de rails de chemin de fer hybride
PCT/EP2021/057117 WO2021186048A1 (fr) 2020-03-19 2021-03-19 Support de rails de chemin de fer

Publications (1)

Publication Number Publication Date
US20230095797A1 true US20230095797A1 (en) 2023-03-30

Family

ID=70295532

Family Applications (1)

Application Number Title Priority Date Filing Date
US17/906,046 Pending US20230095797A1 (en) 2020-03-19 2021-03-19 Support for railway track rails

Country Status (19)

Country Link
US (1) US20230095797A1 (fr)
EP (1) EP4121596B1 (fr)
JP (1) JP2023517967A (fr)
KR (1) KR20230004499A (fr)
CN (1) CN115443360A (fr)
AU (1) AU2021238789B2 (fr)
BR (1) BR112022018438A2 (fr)
CA (1) CA3171534A1 (fr)
CL (1) CL2022002497A1 (fr)
ES (1) ES2970560T3 (fr)
FR (1) FR3108344B1 (fr)
HR (1) HRP20240126T1 (fr)
HU (1) HUE065020T2 (fr)
IL (1) IL296061A (fr)
MX (1) MX2022011444A (fr)
PE (1) PE20221877A1 (fr)
PL (1) PL4121596T3 (fr)
RS (1) RS65206B1 (fr)
WO (1) WO2021186048A1 (fr)

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4711006U (fr) * 1971-03-11 1972-10-09
US4286753A (en) 1974-10-21 1981-09-01 Champion International Corporation Combination wood plastic railroad tie
JPS54138204A (en) * 1978-04-19 1979-10-26 Potsutaa Edowaado Sleeper for rail way
WO2001058663A1 (fr) 2000-02-08 2001-08-16 Siegfried Niedermair Procédé de fabrication de bois revêtu
JP4904073B2 (ja) * 2006-04-04 2012-03-28 積水化学工業株式会社 合成樹脂成形体及び該合成樹脂成形体の製造方法
US20080179418A1 (en) * 2007-01-31 2008-07-31 Chris Brough Composite load bearing structure
JP5400582B2 (ja) * 2009-11-19 2014-01-29 公益財団法人鉄道総合技術研究所 弾性まくらぎ及びまくらぎ用弾性材取付方法
US8727228B2 (en) * 2009-12-30 2014-05-20 Tj Technology Holdings, Llc Structure for railroad ties having data acquisition, processing and transmission means
CN201686903U (zh) * 2010-01-28 2010-12-29 北京盘天新技术有限公司 一种木质内芯复合枕木
CN202671979U (zh) * 2012-07-06 2013-01-16 内蒙古金岗重工有限公司 一种新型复合材料轨枕
EA025408B1 (ru) * 2013-01-14 2016-12-30 Гринрэйл С.Р.Л. Композитная железнодорожная шпала
NO340414B1 (no) 2014-12-22 2017-04-18 Hallingplast As Stolpe omfattende en trekjerne som på sin ytterside er påført en kontinuerlige beskyttelseskappe, samt fremgangsmåte for fremstilling av en slik stolpe.
CN104532692A (zh) * 2014-12-26 2015-04-22 南京工业大学 一种木质夹芯叠层复合材料枕木及施工方法
CN205295815U (zh) * 2015-11-25 2016-06-08 中格复合材料（南通）有限公司 一种复合材料轨枕
DE102018010316A1 (de) * 2018-05-29 2019-12-05 KRAIBURG STRAIL GmbH & Co. KG Eisenbahnschwelle
CN209602875U (zh) * 2019-01-17 2019-11-08 中铁八局集团第二工程有限公司 一种复合层不完全覆盖的轨枕

Also Published As

Publication number Publication date
AU2021238789B2 (en) 2024-02-01
PL4121596T3 (pl) 2024-03-25
PE20221877A1 (es) 2022-12-02
JP2023517967A (ja) 2023-04-27
AU2021238789A1 (en) 2022-10-20
FR3108344A1 (fr) 2021-09-24
CA3171534A1 (fr) 2021-09-23
KR20230004499A (ko) 2023-01-06
EP4121596A1 (fr) 2023-01-25
RS65206B1 (sr) 2024-03-29
FR3108344B1 (fr) 2022-12-30
CN115443360A (zh) 2022-12-06
CL2022002497A1 (es) 2023-03-31
EP4121596B1 (fr) 2023-11-01
BR112022018438A2 (pt) 2022-11-01
EP4121596C0 (fr) 2023-11-01
MX2022011444A (es) 2022-12-15
HRP20240126T1 (hr) 2024-04-12
HUE065020T2 (hu) 2024-04-28
IL296061A (en) 2022-10-01
WO2021186048A1 (fr) 2021-09-23
ES2970560T3 (es) 2024-05-29

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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MOUSSU, BORIS;REEL/FRAME:061406/0488

Effective date: 20220906

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