EP1400628A2 - Rail à gorge - Google Patents

Rail à gorge Download PDF

Info

Publication number: EP1400628A2
Authority: EP; European Patent Office
Prior art keywords: rail; sheath; embedded; coating; boot
Prior art date: 2002-09-10
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP20030255647

Other languages

German (de)

English (en)

Other versions

EP1400628B1 (fr

EP1400628A3 (fr

Inventor

Robin Wolfendale

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Individual

Original Assignee

Individual

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

2002-09-10

Filing date

2003-09-10

Publication date

2004-03-24

2003-09-10 Application filed by Individual filed Critical Individual

2004-03-24 Publication of EP1400628A2 publication Critical patent/EP1400628A2/fr

2004-05-12 Publication of EP1400628A3 publication Critical patent/EP1400628A3/fr

2007-08-29 Application granted granted Critical

2007-08-29 Publication of EP1400628B1 publication Critical patent/EP1400628B1/fr

2023-09-10 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B21/00—Track superstructure adapted for tramways in paved streets

Definitions

This invention relates to improvements in embedded rail constructions for use in the construction of railway and tram tracks.
Embedded rail systems generally comprise cast support slabs having pairs of parallel troughs formed therein, in which the rails are seated in a manner which leaves the running surface of the rail exposed but which allows the rails to be assembled by location in the troughs without need for adjustment of alignment or the use of separate clips to retain the rails on supports such as sleepers.
Such embedded rail systems are particularly suitable for use in street installations of tramlines, and level crossings in other railways, as the rail can be completely recessed to leave only the running surfaces exposed.
US 5,464,152 discloses a precast grade crossing where the rails are embedded in a concrete raft and encased in a rubber boot or sheath which conforms to the cross-section of the rail and encases the base, central web, the underside of the head of the rail, and the outer side face of the head of the rail, leaving only the top running surface and the inner side face of the rail exposed, for contact with the tyres and flanges of the wheels of rail vehicles respectively.
the boot or sheath is of elastomeric material, and is fitted about the rail. The boot provides vibration and noise damping, and electrical insulation of rails which serve as a return electric conductor for power systems, or as part of track signalling circuits.
a shell may be cast into a continuous reinforced concrete slab to allow an elastomeric layer of controlled dimensions to be placed between the rail and the shell to provide resilient support to a rail, for example from WO 03/018912 (Hyperlast Limited), and also from WO 99/63160 (Penny) which is also disclosed in connection with standard rail sections.
the rail is capable of being removed for replacement for example in the event of cracking of the rail or excessive wear.
the factory pre-coated embedded rail system described above has the disadvantage that to ensure the integrity of the coating, the rails must be coated under factory conditions away from the track construction site using bespoke moulds with which it is difficult to ensure close tolerances in the thickness of the coating material.
An object of the invention is to provide a method and construction of sheathing for embedded rail which will enable a resilient sheath to be affixed to the rail at or near the track location so that the rail can be assembled with the minimum handling during preparation and installation.
a method of preparing a rail for assembly as an embedded rail comprises the step of coating at least part of the metal surface of the rail with a layer of an electrically insulating and corrosion resistant material.
the rail is advantageously prepared before coating by abrading the surface of the rail to ensure evenness and remove any rust which may have begun to form, and primed if necessary.
the coating layer may be allowed to cure over a suitable period, and after sufficient cure time has been allowed, a factory moulded elastomer pad, sheath or boot can be fitted around the rail and fixed in place with a low-tack adhesive or other material with similar effect.
the invention also provides a rail construction for use in an embedded rail assembly comprising a metal rail body, at least one outer surface area of which has been coated with a layer of an electrically insulating and corrosion resistant material.
the rail body is further preferably covered on at least said coated surface area with an elastomer pad which may be fixed in place with a low-tack adhesive or other material with a similar effect.
the electrically insulating and corrosion resistant material may comprise a polyurethane or epoxide film which is brush coated or spray coated onto the abraded surfaces of the rail.
the elastomer pad may comprise a body of a suitable elastomeric material which may be expanded or unexpanded, and may comprise a suitable polyurethane material.
All surfaces of the rail except the running surfaces are preferably coated with the electrically insulating and corrosion resistant material and covered by the elastomer pad, which may be provided in the form of a sheath or boot which can be put onto the rail due to its elasticity and flexibility.
the method may be applied to all rail sections, including flat bottomed main line and tram rails, double-headed reversible rails, older style "bull-headed” rails and more recently developed generally rectangular cross-sectional rails.
Fig. 1 shows in cross-section a part of an embedded rail system which includes a concrete base slab, or beam 10 having a channel 11 therein to receive a rail. If the concrete base is a slab, a second channel 11 is provided parallel to that shown at a spacing equal to the gauge of the tramway.
the channel 11 contains a steel tram rail 1 having a flat bottomed base 12, a shank 13, and a head 14 divided by a groove 15 into a running surface 16 and a guard lip 17.
the rail 1 is set in the concrete base in such a way that only the running surface 16, groove 15 and lip 17 are exposed.
the remaining parts of the rail are embedded within the concrete base and are covered firstly with a coating 3 of a layer of electrically insulating and corrosion resistant material. This is achieved by abrading the surfaces of the rail to remove any rust or other corrosion which may have begun to affect the surface, and then applying a coating to form a film which is sufficiently thick to be continuous and coherent, without pores or pinholes which could allow the formation of corrosion to begin, but still relatively thin, preferably less than 1 mm.
Application may be by brush or spray gun, or less preferably by dip-coating.
the coating material preferably is an epoxy or polyurethane resin but other materials with the required properties may be used.
the coating step may be carried out at a factory or depot before transporting to the site of use, or may be carried out at or close to the site of use.
the rail After coating, the rail is, at or close to the site of use, inserted into a sheath or boot 2 of elastomeric material such as a polyurethane material, with the flexibility of the elastomer sheath enabling the awkwardly sectioned rail to be inserted.
the sheathed rail After insertion into the sheath, the sheathed rail is located in channel 11, and concrete poured about the sheathed rail to embed the rail 1 in the concrete slab or beam.
Figure 2 shows a variation where a main line rail 1 is used in place of a tram line or street rail.
the running surface and one side face of the head of the rail is left exposed by the sheath 2, and is not contained within the concrete slab or beam 10.
the rail 1 is coated and sheathed in the same way as the tram rail of Fig. 1 however.
Figs. 3 and 4 differ by showing two versions of a rectangular sectional rail 4, seated in a concrete base or beam 20.
Each rail is coated as before with a polyurethane or epoxy resin or other suitable material layer coating 6 applied to all but the exposed head of the rail 4, and the coated rail 4 is received in an e.g. polyurethane sheath or boot 5 which is contoured with ribs 7 to key with the concrete to resist dislodgement.
the rail 4 of Fig. 3 differs from that of Fig. 4 in that a recess 8 is provided towards the bottom on each side of the rail, whilst in Fig. 4 this recess 9 extends over all of the flanks of the rail except for the head and foot regions, giving the rail a very shallowly "waisted" configuration.
the rails are coated with a coating 6 before employment, and are inserted into the sheaths 5 at or near the site of use, then cast in situ into the concrete base or beam 20.
the initial polyurethane or epoxy or other suitable film coating provides reliable corrosion protection and electrical insulation to the rail.
Thin coatings can provide good protection to steel so long as their integrity as a barrier is maintained. Where coatings are subject to local damage the use of such coatings can lead to accelerated degradation particularly where there are impressed electrical currents flowing through the steel as is often the case with rail tracks.
the outer elastomer pad or sheath mitigates this effect once assembled and provides protection for the inner coating during handling and installation of the rail, as well as serving as a resilient foundation for the rail.
the rail 1 cannot be removed from the sheath 2, but the rails shown in Figs. 3 and 4 can be removed if required.
the sheath 5 here needs to be held sufficiently firmly to the rail during handling and installation to avoid damage, and an adhesive may be used for this purpose.

Landscapes

Architecture (AREA)
Civil Engineering (AREA)
Structural Engineering (AREA)
Engineering & Computer Science (AREA)
Railway Tracks (AREA)
Laminated Bodies (AREA)
Machines For Laying And Maintaining Railways (AREA)
Valve-Gear Or Valve Arrangements (AREA)
Steering Control In Accordance With Driving Conditions (AREA)
Superconductors And Manufacturing Methods Therefor (AREA)
Pens And Brushes (AREA)
Ropes Or Cables (AREA)
Road Signs Or Road Markings (AREA)
Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)

EP03255647A 2002-09-10 2003-09-10 Rail à gorge Expired - Lifetime EP1400628B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
GBGB0220918.7A GB0220918D0 (en)	2002-09-10	2002-09-10	Assembled embedded rail
GB0220918		2002-09-10

Publications (3)

Publication Number	Publication Date
EP1400628A2 true EP1400628A2 (fr)	2004-03-24
EP1400628A3 EP1400628A3 (fr)	2004-05-12
EP1400628B1 EP1400628B1 (fr)	2007-08-29

Family

ID=9943755

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP03255647A Expired - Lifetime EP1400628B1 (fr)	2002-09-10	2003-09-10	Rail à gorge

Country Status (6)

Country	Link
EP (1)	EP1400628B1 (fr)
AT (1)	ATE371768T1 (fr)
DE (1)	DE60315931T2 (fr)
ES (1)	ES2292908T3 (fr)
GB (1)	GB0220918D0 (fr)
PT (1)	PT1400628E (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2009128707A1 (fr) *	2008-04-18	2009-10-22	Edilon)(Sedra B.V.	Procédé d'installation d'un système de rail intégré
EP2333155A2 (fr) *	2009-11-18	2011-06-15	Voestalpine Railpro BV	Joint électriquement isolant et rail revêtu
CN105568781A (zh) *	2016-03-07	2016-05-11	青岛思锐科技有限公司	一种埋入式轨道钢轨防腐结构及其制备方法
WO2018024502A1 (fr) *	2016-08-01	2018-02-08	Edilon Sedra Gmbh	Rail et isolation électrique
US12338581B2 (en)	2019-03-08	2025-06-24	Trelleborg Retford Limited	Noise damper and a method for producing a noise damper

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102009039288B4 (de) *	2009-04-20	2014-02-13	Schomburg Gmbh & Co. Kg	Verfahren zur Kriechstromunterbrechung und/oder Streustromisolierung
CN105735057A (zh) *	2016-03-07	2016-07-06	青岛思锐科技有限公司	一种埋入式轨道钢轨包覆减振结构及其制备方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP3032071B2 (ja) *	1992-02-05	2000-04-10	第一高周波工業株式会社	被覆レール
US5464152A (en) *	1994-01-07	1995-11-07	Pacific International Pipe Enterprises, Inc.	Method and apparatus for electrically isolating a rail in a precast concrete grade crossing
JPH09173923A (ja) *	1995-12-26	1997-07-08	Mitsubishi Heavy Ind Ltd	レール面連続塗装装置
JPH09268503A (ja) *	1996-03-30	1997-10-14	Nippon Steel Corp	防蝕性に優れるレール及びその製造方法
GB9622924D0 (en) *	1996-11-04	1997-01-08	Alh Syst Ltd	Polymer embedment of rails
JPH11100801A (ja) *	1997-07-31	1999-04-13	Nippon Steel Corp	防食性に優れるレール及びレール表面層の残留応力の測定方法

2002
- 2002-09-10 GB GBGB0220918.7A patent/GB0220918D0/en not_active Ceased
2003
- 2003-09-10 AT AT03255647T patent/ATE371768T1/de not_active IP Right Cessation
- 2003-09-10 ES ES03255647T patent/ES2292908T3/es not_active Expired - Lifetime
- 2003-09-10 DE DE60315931T patent/DE60315931T2/de not_active Expired - Lifetime
- 2003-09-10 EP EP03255647A patent/EP1400628B1/fr not_active Expired - Lifetime
- 2003-09-10 PT PT03255647T patent/PT1400628E/pt unknown

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2009128707A1 (fr) *	2008-04-18	2009-10-22	Edilon)(Sedra B.V.	Procédé d'installation d'un système de rail intégré
EA016922B1 (ru) *	2008-04-18	2012-08-30	Эдилон) (Седра Б.В.	Способ установки системы встроенных рельсов
EP2333155A2 (fr) *	2009-11-18	2011-06-15	Voestalpine Railpro BV	Joint électriquement isolant et rail revêtu
CN105568781A (zh) *	2016-03-07	2016-05-11	青岛思锐科技有限公司	一种埋入式轨道钢轨防腐结构及其制备方法
CN105568781B (zh) *	2016-03-07	2017-05-03	青岛思锐科技有限公司	一种埋入式轨道钢轨防腐结构及其制备方法
WO2018024502A1 (fr) *	2016-08-01	2018-02-08	Edilon Sedra Gmbh	Rail et isolation électrique
US12338581B2 (en)	2019-03-08	2025-06-24	Trelleborg Retford Limited	Noise damper and a method for producing a noise damper

Also Published As

Publication number	Publication date
ATE371768T1 (de)	2007-09-15
EP1400628B1 (fr)	2007-08-29
DE60315931T2 (de)	2008-05-21
ES2292908T3 (es)	2008-03-16
EP1400628A3 (fr)	2004-05-12
DE60315931D1 (de)	2007-10-11
PT1400628E (pt)	2007-12-06
GB0220918D0 (en)	2002-10-23

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Publication	Publication Date	Title
US6045052A (en)	2000-04-04	Rail tie fastening assembly
US4925094A (en)	1990-05-15	Concrete railroad ties
EP2155964B1 (fr)	2014-06-18	Module préfabriqué pour une voie ferrée et procédé de fabrication de ce module
EP1400628B1 (fr)	2007-08-29	Rail à gorge
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