EP2669433A1 - Betonschwelle - Google Patents

Betonschwelle Download PDF

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Publication number
EP2669433A1
EP2669433A1 EP12169824.5A EP12169824A EP2669433A1 EP 2669433 A1 EP2669433 A1 EP 2669433A1 EP 12169824 A EP12169824 A EP 12169824A EP 2669433 A1 EP2669433 A1 EP 2669433A1
Authority
EP
European Patent Office
Prior art keywords
sleeper
crack
concrete body
portions
concrete
Prior art date
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.)
Withdrawn
Application number
EP12169824.5A
Other languages
English (en)
French (fr)
Inventor
Rikard Bolmsvik
Mikael Thuresson
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.)
Abetong AB
Original Assignee
Abetong AB
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.)
Filing date
Publication date
Application filed by Abetong AB filed Critical Abetong AB
Priority to EP12169824.5A priority Critical patent/EP2669433A1/de
Priority to EP13169677.5A priority patent/EP2669434A3/de
Publication of EP2669433A1 publication Critical patent/EP2669433A1/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B37/00—Making, maintaining, renewing, or taking-up the ballastway or the track, not provided for in a single one of groups E01B27/00 - E01B35/00
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
    • 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
    • E01B3/28—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone

Definitions

  • the present invention relates to a sleeper having a concrete body, reinforcement elements embedded in the concrete, and rail fasteners mounted at a top surface of the sleeper.
  • non-wooden materials are typically used for the sleepers.
  • the sleepers are made of prestressed reinforced concrete.
  • the timber sleepers degrade over time, and when a need for maintenance occurs it would be desired to replace all sleepers with new non-timber sleepers.
  • this is considered to be too expensive, and therefore typically only a part of the sleepers are replaced with new sleepers, i.e. spot replacement is common due to economic reasons.
  • spot replacement is common due to economic reasons.
  • the invention is based on the insight that an important property that differs a lot between a timber sleeper and a concrete sleeper is the bending stiffness, and that by deliberately cracking the concrete at predetermined portions of the sleeper it is possible to adapt the bending stiffness to resemble that of a timber sleeper in those portions.
  • a sleeper comprising a concrete body, reinforcement elements embedded in the concrete, and rail fasteners.
  • the sleeper has a top surface and a bottom surface.
  • the concrete body is provided with multiple crack portions, wherein each crack portion contains multiple cracks.
  • the crack portions have been formed at predetermined positions of the sleeper.
  • the crack portions can be positioned as desirable.
  • At least one of the crack portions is positioned at the bottom surface. Thereby the sleeper is able to bend down while the crack is temporarily widening when subject to a load directed downwards, e.g. when a railway wagon passes the sleeper.
  • said multiple crack portions comprise a crack portion positioned in a position where the sleeper is arranged to receive a rail at the top surface opposite to the crack portion.
  • the plural crack portions cover the whole top surface and the whole bottom surface.
  • the concrete body has a uniform cross-section.
  • the shape has been adapted to that of the timber sleepers, which reduces the effort of replacing a timber sleeper with a concrete sleeper.
  • the cracks of at least one of the crack portions extend from the very surface of the concrete body to a depth corresponding to at least half of the total height of the concrete body.
  • a primary application for the concrete sleeper according to the present invention is as replacement for a timber sleeper of a railway track.
  • the railway track 100 comprises two rails 102 and many sleepers 104, which have been recessed in ballast (not shown). After having performed maintenance on the railway track 100, typically most of the sleepers are still timber sleepers 105, while some of them have been replaced with the concrete sleepers 104.
  • the sleeper 104 comprises a concrete body 109, reinforcement elements 108 embedded in the concrete body 109, and rail fasteners 106 mounted at a top surface 116 of the sleeper 104. Furthermore, the concrete body 109 is provided with multiple cracks portions 110, which have been formed at predetermined positions of the sleeper 104 between its ends 112, 114. At least one of the crack portions 110 is provided at a bottom surface 118 of the sleeper 104, and preferably below the rail fastener 106, which is arranged on top surface opposite thereof.
  • Each crack portion 110 contains multiple cracks 120, which extend from the surface 116, 118 into the concrete body 109 to a depth corresponding to a fraction of the total height of the sleeper 104.
  • An appropriate depth in order to reduce the bending stiffness enough has shown to be about half the height of the sleeper 104. It is possible to make the cracks 120 deeper, even to make them reach all way through the sleeper 104. Similarly, due to the circumstances it can be applicable to make the cracks 120 more shallow, extending to a depth corresponding to only a small fraction of the height.
  • reinforcement elements 108 may be uncovered. Although corrosion is basically desirable to avoid, it is no problem in practise within this field.
  • corrosion protected reinforcement elements 108 is a possible alternative.
  • the reinforcement elements 108 can be surface protected or made of stainless steel. The reinforcement elements are conventionally arranged, and will not be further described.
  • the rail fasteners can be of different known types depending on application and depending on the position of the sleeper 104 along the railway track 100.
  • each crack portion 110 there are three crack portions 110, wherein two crack portions 110 are respectively positioned at the bottom surface 118 below each respective rail fastener 106, and one crack portion 110 is positioned at the top surface 116 between the rail fasteners 106.
  • the bending stiffness has been reduced at the rails and at the mid section of the sleeper 104 in comparison with an uncracked sleeper. The reduction causes a softer behaviour which resembles the behaviour of the adjacent timber sleepers 105.
  • the overall shape of the present sleeper 104 corresponds with the shape of conventional timber sleepers.
  • the cross-section is rectangular and the size of the cross-section is the same throughout the length of the sleeper 104.
  • the cracks portions 110 are, for instance, provided at a late stage of the manufacturing of the sleeper, by an appropriate loading applied to the sleeper 104 at the opposite surface of the predetermined positions where the crack portions 110 are to be formed.
  • the first embodiment of the sleeper 104 is provided with merely a few crack portions 110 having limited extensions, according to further embodiments more crack portions 110 and/or to an increased extension of the crack portions are arranged. At least for particular applications, it can be preferable to provide the sleeper 104 with a large number of cracks evenly distributed along the length of the sleeper, in order to obtain a sleeper with a substantially equal local bending stiffness across the whole sleeper. In other words, the crack portions 110 may cover the whole top surface 116 and the whole bottom surface 118 of the sleeper.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Railway Tracks (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
EP12169824.5A 2012-05-29 2012-05-29 Betonschwelle Withdrawn EP2669433A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12169824.5A EP2669433A1 (de) 2012-05-29 2012-05-29 Betonschwelle
EP13169677.5A EP2669434A3 (de) 2012-05-29 2013-05-29 Verfahren und Vorrichtung zur Anpassung von Eisenbahnbetonschwellen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12169824.5A EP2669433A1 (de) 2012-05-29 2012-05-29 Betonschwelle

Publications (1)

Publication Number Publication Date
EP2669433A1 true EP2669433A1 (de) 2013-12-04

Family

ID=48468190

Family Applications (2)

Application Number Title Priority Date Filing Date
EP12169824.5A Withdrawn EP2669433A1 (de) 2012-05-29 2012-05-29 Betonschwelle
EP13169677.5A Withdrawn EP2669434A3 (de) 2012-05-29 2013-05-29 Verfahren und Vorrichtung zur Anpassung von Eisenbahnbetonschwellen

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP13169677.5A Withdrawn EP2669434A3 (de) 2012-05-29 2013-05-29 Verfahren und Vorrichtung zur Anpassung von Eisenbahnbetonschwellen

Country Status (1)

Country Link
EP (2) EP2669433A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106400616A (zh) * 2016-12-05 2017-02-15 兰州理工大学 用于无砟轨道砼裂缝控制的大半径倒角轨枕及施工方法
RU2774897C1 (ru) * 2022-03-03 2022-06-27 Валерий Михайлович Круглов Шпала железобетонная универсальная для скрепления анкерного типа

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1410496A (en) * 1921-11-23 1922-03-21 William F Morrison Concrete railroad tie
DE102007046249A1 (de) * 2007-09-26 2009-04-09 Edilon) (Sedra Gmbh Gleiskörper mit geklebten Trögen
US20100012742A1 (en) * 2008-07-15 2010-01-21 Li Victor C Railway tie using strain-hardening brittle matrix composites

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10354483B4 (de) * 2003-11-21 2006-02-02 Db Netz Ag Verfahren zur Aufarbeitung und Überprüfung gebrauchter Betonschwellen
AT506813B1 (de) * 2008-04-21 2009-12-15 Kirchdorfer Fertigteilholding Verfahren zum prüfen von spannbetonteilen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1410496A (en) * 1921-11-23 1922-03-21 William F Morrison Concrete railroad tie
DE102007046249A1 (de) * 2007-09-26 2009-04-09 Edilon) (Sedra Gmbh Gleiskörper mit geklebten Trögen
US20100012742A1 (en) * 2008-07-15 2010-01-21 Li Victor C Railway tie using strain-hardening brittle matrix composites

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106400616A (zh) * 2016-12-05 2017-02-15 兰州理工大学 用于无砟轨道砼裂缝控制的大半径倒角轨枕及施工方法
CN106400616B (zh) * 2016-12-05 2018-01-02 兰州理工大学 用于无砟轨道砼裂缝控制的大半径倒角轨枕及施工方法
RU2774897C1 (ru) * 2022-03-03 2022-06-27 Валерий Михайлович Круглов Шпала железобетонная универсальная для скрепления анкерного типа

Also Published As

Publication number Publication date
EP2669434A2 (de) 2013-12-04
EP2669434A3 (de) 2015-12-02

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