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EP2155965B1 - Procédé pour la stabilisation du ballast d'une voie ferrée - Google Patents

Procédé pour la stabilisation du ballast d'une voie ferrée Download PDF

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Publication number
EP2155965B1
EP2155965B1 EP07851276.1A EP07851276A EP2155965B1 EP 2155965 B1 EP2155965 B1 EP 2155965B1 EP 07851276 A EP07851276 A EP 07851276A EP 2155965 B1 EP2155965 B1 EP 2155965B1
Authority
EP
European Patent Office
Prior art keywords
ballast
layer
gravels
existing
geosynthetics
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.)
Active
Application number
EP07851276.1A
Other languages
German (de)
English (en)
Other versions
EP2155965A1 (fr
EP2155965A4 (fr
Inventor
Il Wha Lee
Seung Yup Jang
Eun Kim
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.)
Korea Railroad Research Institute KRRI
Original Assignee
Korea Railroad Research Institute KRRI
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 Korea Railroad Research Institute KRRI filed Critical Korea Railroad Research Institute KRRI
Publication of EP2155965A1 publication Critical patent/EP2155965A1/fr
Publication of EP2155965A4 publication Critical patent/EP2155965A4/fr
Application granted granted Critical
Publication of EP2155965B1 publication Critical patent/EP2155965B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E01B2/00—General structure of permanent way
    • 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
    • E01B1/001—Track with ballast
    • 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
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C3/00—Foundations for pavings
    • 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
    • E01B2204/05—Use of geotextiles

Definitions

  • the present invention relates to a high strength prepacked concrete track construction process thereof, and more particularly to a high strength prepacked concrete track construction process in which existing sleepers and fasteners are replaced, an existing ballast layer is excavated and geosynthetics are installed on a roadbed layer, and existing ballast gravels, that are dry-washed on the spot, are filled therein and high strength and super early strength cement mortar is injected thereto to form a high strength and super early strength prepacked cement ballast layer to thereby replace the existing gravel ballast track with a concrete ballast track.
  • Tracks are a portion that supports weight of a train in the railway, transmits the weight to a roadbed, and guides running of the train. Particularly, the running stability and driving comport of the train are directly influenced by the performance of the track, and interaction between the track and the train is the greatest factor on noises and vibrations.
  • the gravel ballast track is a conventional basic track structure, which is of cheap construction costs and proper track elasticity so that upon occurrence of track deviation, it is relatively easily rearranged.
  • the gravels are positioned at the lowest portion of the track, serving to absorb shocks upon train running to mitigate the vibrations, and distribute the load of the train transmitted via the sleepers to thereby prevent a rail from subsiding or moving. Further, it facilitates the draining of rainwater and prevents grasses from growing on the ballast.
  • the concrete ballast has an advantage in that the maintenance work is mitigated, the draining is good, and vibrations of the ballast and the train are reduced.
  • the slab ballast is of a structure in which the sleepers and the ballast are made in one piece, so that the track deviation and ballast sinking due to speed-up of the train are reduced to save the maintenance cost.
  • the existing gravel ballast track is gradually replaced with a concrete or slab track, and an efficient track has been studied which is capable of reducing the maintenance that is the problem in the existing gravel ballast track.
  • the existing ballast gravel track is modified to provide a concrete ballast track such as a slab track or the like.
  • a conventional ballast modifying construction is generally carried out so as to improve the antiquated gravel ballast track used in subway, through the processes of removal of existing tracks, installing of new sleepers, a concrete form, a jacket and a temporary support, and pouring and curing of concrete in sequence, the processes and structure of which are similar to those of the construction of the slab track and that of the track.
  • KR 2006 0021688 A describes a construction method of a railway track including a roadbed layer, a geotextile having a lower part and sides mounted thereon, and a ballast layer hardened by pouring cement mortar.
  • the gravel ballast track of the existing railway has no invert so that problems are caused in that upon pouring of concrete, the concrete flows out, the construction speed is slow because the construction is dependent on manpower, and the train speed is restricted in a state where the temporary support is installed so that the operation of the train is delayed for a long time.
  • the present invention has been made to solve the above problems occurring in the prior art, and an object of the present invention is to provide a new concrete track construction process capable of preventing outflow of concrete with the provision of geosynthetics even without installation of an invert.
  • Another object of the present invention is to provide a new concrete track construction process capable of carrying out the evacuation of existing ballast, installation of geosynthetics, and filling of new ballast layer with machine such as using a ballast cleaner and a gravel dry-washer.
  • Further object of the present invention is to provide a new concrete track construction process in which high strength and super early strength cement mortar is injected into a new ballast layer using a cement mortar injector without installing the temporary support during the ballast modification, to thereby form a high strength and super early strength prepacked concrete ballast layer.
  • a prepacked concrete track structure which comprises geosynthetics installed on a roadbed layer, a new ballast layer formed on the geosynthetics, a sleeper installed on the new ballast layer, a fastener installed on the sleeper, and a rail connected to the fastener, wherein the geosynthetics is installed such that the bottom thereof is brought into contact with the upper portion of the roadbed layer, right and left sides of the bottom of the geosynthetics having side faces perpendicular to the bottom; wherein the new ballast layer is composed of high strength and super early strength prepacked concrete that is filled and cured in the internal space where the geosynthetics are installed; wherein the sleeper consists of the plurality of sleepers installed on the new ballast layer parallel with each other; and wherein the rail is connected on the upper surface of the sleeper using the fastener so as to be perpendicular to the sleeper.
  • the geosynthetics are previously installed, new ballast gravels are filled therein, and the cement mortar is injected thereto, to thereby prevent flow-out of the prepacked concrete without installing a separate invert.
  • ballast gravels are re-used without removal, and the removal process of the ballast, that is dependent on labor, is carried out using the ballast cleaner so that the construction speed is greatly increased.
  • ballast layer is formed with high strength and super early strength prepacked concrete, which does not affect the operation of the train.
  • the construction period is greatly shortened so that the construction process is suitable to maintenance or construction of the railway track within a restricted period.
  • FIGS. 1 to 3 are a schematic perspective view, a sectional view, and side sectional view illustrating the concrete ballast track structure according to the present invention, respectively.
  • the concrete ballast track includes, from a lower portion thereof, a roadbed layer 10, one or more sheets of geosynthetics 30, a new ballast layer 21, a sleeper 50, a fastener 60, and a rail 70.
  • FIG. 4 is a schematic perspective view illustrating geosynthetics fabricated so as to be attached to a ballast cleaner.
  • the geosynthetics 30 may be unwoven fabric, geotextile, geomembrane or others, and are installed on the roadbed layer 10 such that the bottom thereof is brought into contact with the upper surface of the roadbed layer 10, and the right and left sides thereof have the side faces perpendicular to the bottom thereof, i.e. having a cross section shaped like ' ⁇ '. Further, as illustrated in a circle showing an enlarged cross section taken along line A-A of FIG.
  • a panel having a certain width is inserted into both sides of the geosynthetics 30 such that both the sides of the geosynthetics 30 are fixedly installed perpendicular to the bottom thereof when the geosynthetics 30 are installed on the roadbed layer 10.
  • the panel is preferably installed on both sides of the geosynthetics 30 using lattice type polypropylene by a length corresponding to height of the new ballast layer 21.
  • the geosynthetics 30 may be fabricated in roll type using a connection beam such that they are attached to the ballast cleaner so that the construction is carried out through mechanization.
  • the installation of the geosynthetics 30 is carried out at the same time as working type 2 using the ballast cleaner or a ballast regulator, and serves to rapidly drain rainwater or inflow water around them, and prevents injected concrete from leaking, so that there is no need to install a separate invert.
  • the new ballast layer 21 is composed of a prepacked concrete layer consisting of new ballast gravels and high strength and super early strength cement mortar injected thereto.
  • the new ballast gravels constituting the new ballast layer 21 are ones that are obtained by basically recycling the existing ballast gravels.
  • the existing ballast gravels recycled by the ballast cleaner are washed on the spot using a dry-type washer and then are filled in the roadbed layer 10. At this time, only the gravels having a certain grain size are recycled, and the other part may be compensated with new gravels.
  • high strength and super early strength cement mortar is injected between the new ballast gravels using a continuous type injector 24 comprising a mixer 25, a mixer hood, a continuous mixer 26, a cushion tank 27, and a pump, to thereby form prepacked concrete.
  • a continuous type injector 24 comprising a mixer 25, a mixer hood, a continuous mixer 26, a cushion tank 27, and a pump, to thereby form prepacked concrete. Since the cement mortar is injected into space between the sleepers 50 in a natural dropping manner, it should have good fluidity so as to be uniformly injected between the ballast gravels without vacancies, have a short curing time so as not to hinder the operation of the train, and have higher strength than common cement mortar having a compressive strength of 10MPa because it receives the load of the train.
  • the cement mortar be of the compressive strength of 30MPa or more in order to support the load of the train. Further, it is preferable that the cement mortar be of composition to provide an uniaxial compressive strength of 0.4MPa an hour in order not to hinder the operation of the train. Further, it is preferable that admixtures such as superplasticity, and fine aggregates with constant grain size be added thereto in order to improve fluidity while considering the economical aspect. Further, it is preferable that the cement mortar be of composition by which the curing speed is fast due to having super early strength cement, high strength is obtained due to having additives with Ca 2+ and SO 4 2- , and high fluidity is obtained due to having fine aggregates with constant grain size.
  • the grain size of the ballast gravels that are the aggregates constituting the prepacked concrete, be of 100% passing weight ratio for 63mm mesh screen, 75 to 95% for 50mm mesh screen, 50 to 80% for 40mm mesh screen, 25 to 50% for 30mm mesh screen, 5 to 30% for 25mm mesh screen, and 0 to 10% for 20mm mesh screen.
  • FIG. 5 is a schematic perspective view illustrating a sleeper 50.
  • the sleeper 50 is preferably of a wide width in order to increase load distributing capability. Further, while the sleeper 50 is preferably of heavy weight so as to reduce vibration acceleration of the gravel ballast because the gravel ballast should support the load until the cement mortar is filled, it is preferable that the sleeper 50 be of a width of 360mm in order to carry out mechanized construction using a multiple tie tamper (MTT) that is the existing maintenance device of railroad.
  • MTT multiple tie tamper
  • the width of the sleeper 50 may vary depending upon dimension of the device used. In case of using the concrete sleeper 50, it is possible to apply post-tension to provide a lateral reinforcement for securing required tensile strength.
  • the fastener 60 installed on the sleeper 50 is preferably constructed such that it may be controlled in length by vertically ⁇ 30mm or more and laterally ⁇ 25mm or more using an insulating block or an eccentric bush so as to correct possible track deviation that may occur in the future time because the sleeper 50 and the new ballast layer 21 are integrated into one piece.
  • an asphalt surface layer 40 may be provided on the new ballast layer 21 so as to facilitate draining of water, or prevent the surface contamination such as generation of dusts.
  • the construction process of the concrete ballast track having the above structure is as follows. As illustrated in FIG. 7 (a) , first, existing sleepers 50 and the fasteners 60 are removed, and new sleepers 50 and fasteners 60 are installed. Herein, if machine such as a sleeper exchanger is used, 40 sleepers 50 an hour are generally exchanged. After exchanging the sleepers 50 and the fasteners 60, a rail 70 is coupled to the sleepers 50 using the exchanged fasteners 60. After the rail 70 is coupled, as illustrated in FIG. 7 (b) , the existing ballast is excavated in front of the ballast cleaner using the same and the gravels are collected.
  • the existing ballast layer 20 is excavated in such a way as to provide an inclined shoulder layer 22 such that the upper portion of the existing ballast layer 20 rises in height as it goes outside in order to prevent the foreign matters from coming in.
  • the geosynthetics 30 are installed on the roadbed layer 10 exposed by the excavation of the existing ballast layer 20, using the geosynthetics roll attached by a connection beam.
  • the new ballast gravels that are washed on the spot using the dry-type gravel washer are filled in the internal space defined by the installation of the geosynthetics 30.
  • the ballast cleaner can generally carry out the cleaning operation for an interval of 110m an hour, and the existing processes of the removal of the existing ballast gravels, the installing of the geosynthetics 30, the discharging of the removed gravels, and the filling of the new ballast gravels can be simultaneously carried out using such a ballast cleaner.
  • the arrangement of track gravels and line adjustment are carried out using the MTT.
  • the line adjustment using the MTT it can be continuously and precisely carried out using a computer, a laser guiding device and others so that the process may be conducted efficiently and precisely to the extent of generally covering an interval of 1200mm an hour.
  • high strength and super early strength cement mortar is injected into the new gravel layer using the continuous type injector 24 to thereby form the prepacked concrete ballast layer 21.
  • the prepacked concrete is prevented from flowing out, the existing ballast gravels are re-used without removal, and the removal process of the ballast, that is dependent on labor, is carried out using the ballast cleaner so that the construction speed is greatly increased.
  • the new ballast layer is formed with high strength and super early strength prepacked concrete, so that the present concrete ballast track does not affect the operation of the train.
  • the construction period is greatly shortened so that the construction process is suitable to maintenance or construction of the railway track within a restricted period, and that it can be applied to a section that may be a section where track deviation occurs repeatedly, and sections such as a connecting part, a welded part or the like where track deviation possibly occurs.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Railway Tracks (AREA)
  • Machines For Laying And Maintaining Railways (AREA)

Claims (2)

  1. Procédé de construction de voie en béton préconditionné comprenant les étapes consistant à
    échanger une traverse (50) existante et une pièce de fixation (60) existante, accoupler un rail (70) à la traverse (50) échangée à l'aide d'une pièce de fixation (60) échangée, excaver une couche de ballast (20) existante à l'aide d'une dégarnisseuse-cribleuse et installer des géosynthétiques (30) sur une couche de plateforme (10),
    dans lequel les géosynthétiques sont installés sur la couche de plateforme (10) de façon telle que leur partie inférieure est mise en contact avec la surface supérieure de la couche de plateforme (10) et leurs côtés droit et gauche ont les faces latérales perpendiculaires à leur partie inférieure,
    le procédé de construction de voie en béton préconditionné comprenant
    le lavage à sec des graviers de ballast existants et le remplissage de l'espace interne où les géosynthétiques (30) sont installés avec des nouveaux graviers de ballast obtenus essentiellement par recyclage des graviers de ballast existants ;
    l'ajustement de position du rail (70) à l'aide d'une bourreuse à pioches multiples (MTT) ; et
    l'injection de mortier de ciment à haute résistance et à très haute résistance initiale dans la nouvelle couche de graviers de ballast pour former une couche de béton préconditionné (21),
    dans lequel le béton préconditionné comprend des graviers de ballast et du mortier de ciment à haute résistance et à très haute résistance initiale injecté dans ceux-ci.
  2. Procédé de construction de voie en béton préconditionné selon la revendication 1, dans lequel dans l'étape d'excavation de la couche de ballast (20) existante à l'aide de la dégarnisseuse-cribleuse, d'installation de géosynthétiques (30) sur la couche de plateforme (10), de lavage à sec des graviers de ballast existants et de remplissage de l'espace interne où les géosynthétiques (30) sont installés avec les nouveaux graviers de ballast, avec un seul passage de la dégarnisseuse-cribleuse, l'excavation de la couche de ballast (20) existante est effectuée devant la dégarnisseuse-cribleuse et en même temps, l'installation des géosynthétiques (30) est effectuée au milieu de la dégarnisseuse-cribleuse et le remplissage avec les nouveaux graviers de ballast est effectué à l'arrière de la dégarnisseuse-cribleuse.
EP07851276.1A 2007-04-16 2007-12-06 Procédé pour la stabilisation du ballast d'une voie ferrée Active EP2155965B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020070037034A KR100838227B1 (ko) 2007-04-16 2007-04-16 기계화 시공을 위한 고강도 속경성 프리팩트 콘크리트 도상궤도 구조 및 시공방법
PCT/KR2007/006305 WO2008126973A1 (fr) 2007-04-16 2007-12-06 Structure de voie en béton préconditionnée à haute résistance et durcissement rapide pour effectuer un procédé de mécanisation et d'usinage de celle-ci

Publications (3)

Publication Number Publication Date
EP2155965A1 EP2155965A1 (fr) 2010-02-24
EP2155965A4 EP2155965A4 (fr) 2011-05-18
EP2155965B1 true EP2155965B1 (fr) 2017-09-13

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EP07851276.1A Active EP2155965B1 (fr) 2007-04-16 2007-12-06 Procédé pour la stabilisation du ballast d'une voie ferrée

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EP (1) EP2155965B1 (fr)
KR (1) KR100838227B1 (fr)
WO (1) WO2008126973A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2666501C1 (ru) * 2017-09-15 2018-09-07 Акционерное общество "ОргСинтезРесурс" Способ укрепления балластной призмы

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HU230288B1 (hu) * 2012-09-21 2015-12-28 Zoltán Mészárics Vasúti pályaszerkezet előre gyártott elemekből és eljárás annak megépítésére
JP6523980B2 (ja) * 2016-01-28 2019-06-05 公益財団法人鉄道総合技術研究所 てん充道床軌道の施工方法
JP6830044B2 (ja) * 2017-07-03 2021-02-17 公益財団法人鉄道総合技術研究所 既設スラブ軌道からまくらぎ直結軌道への変更方法
CN107761477B (zh) * 2017-09-18 2019-06-14 中都工程设计有限公司 一种紧邻桥墩的路基结构
CN109680584B (zh) * 2018-12-30 2021-04-13 张家口路桥建设集团有限公司 季冻区防冻融的稳定路基结构及施工工艺
CN110144783B (zh) * 2019-04-26 2020-04-28 福建省昊立建设工程有限公司 一种路基施工方法
JP2021070981A (ja) * 2019-10-31 2021-05-06 住友大阪セメント株式会社 省力化軌道用砕石、省力化軌道、および、省力化軌道の形成方法
KR102121029B1 (ko) 2020-02-06 2020-06-10 정주건설 주식회사 도상 콘크리트 시공방법
KR102694291B1 (ko) * 2024-02-20 2024-08-13 (주)유성테크 철도 레일 도상용 콘크리트 조성물

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JP2625329B2 (ja) * 1992-09-21 1997-07-02 財団法人鉄道総合技術研究所 省力化軌道下部の道床安定化工法
CZ59493A3 (en) * 1993-04-06 1995-04-12 Mechanizace Tratoveho Hospod Maintenance mechanized machine
DK0726360T3 (da) * 1995-02-09 1999-09-27 Plasser Bahnbaumasch Franz Fremgangsmåde og maskine til understopning og stabilisering af et spor
US6619405B2 (en) * 2001-04-25 2003-09-16 Franz Plasser Bahnbaumaschinen-Industriegesellschaft Mbh Ballast cleaning machine and method
KR20060021688A (ko) * 2004-09-03 2006-03-08 한국철도기술연구원 자갈도상궤도용 시멘트모르타 유하주입형 포장궤도의시공방법 및 그를 이용한 구조

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Publication number Priority date Publication date Assignee Title
RU2666501C1 (ru) * 2017-09-15 2018-09-07 Акционерное общество "ОргСинтезРесурс" Способ укрепления балластной призмы

Also Published As

Publication number Publication date
WO2008126973A1 (fr) 2008-10-23
EP2155965A1 (fr) 2010-02-24
KR100838227B1 (ko) 2008-06-16
EP2155965A4 (fr) 2011-05-18

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