US20080083835A1 - Rail track tie - Google Patents

Rail track tie Download PDF

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Publication number
US20080083835A1
US20080083835A1 US11/903,389 US90338907A US2008083835A1 US 20080083835 A1 US20080083835 A1 US 20080083835A1 US 90338907 A US90338907 A US 90338907A US 2008083835 A1 US2008083835 A1 US 2008083835A1
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US
United States
Prior art keywords
block
tie
range
resilient
rail track
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.)
Abandoned
Application number
US11/903,389
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English (en)
Inventor
Marcel Girardi
Charles Petit
Frederic Le Corre
Ian Robertson
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.)
Alstom Transport SA
Original Assignee
Alstom Transport SA
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 Alstom Transport SA filed Critical Alstom Transport SA
Assigned to ALSTOM TRANSPORT SA reassignment ALSTOM TRANSPORT SA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GIRARDI, MARCEL, LE CORRE, FREDERIC, PETIT, CHARLES, ROBERTSON, IAN
Publication of US20080083835A1 publication Critical patent/US20080083835A1/en
Abandoned 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
    • 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
    • E01B1/005—Ballastless track, e.g. concrete slab trackway, or with asphalt layers with sleeper shoes
    • 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
    • E01B3/40—Slabs; Blocks; Pot sleepers; Fastening tie-rods to them
    • 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
    • E01B3/44—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from other materials only if the material is essential
    • 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 present invention relates to a rail track tie or “sleeper”, of the type comprising:
  • a rigid block presenting a bottom face, and a top face for receiving at least one longitudinal rail
  • a cover for receiving the rigid block and in the form of a rigid shell comprising a bottom and a peripheral rim around the bottom;
  • a resilient soleplate disposed between the bottom face of the rigid block and the bottom of the cover.
  • Such ties are frequently used for laying a rail track without ballast, e.g. in or on a structure such as a tunnel or a viaduct, where the ties are supported by a bed or a slab.
  • EP-A-0 919 666 describes a tie of this type.
  • the rigid cover is embedded in a concrete slab, and together therewith it forms a rigid assembly.
  • Each rail generally rests on a resilient bearing element, disposed between each rail and the rigid block.
  • the resilient bearing elements thus form a first elastic stage. They may be mounted when the track is laid, or beforehand, e.g. when the tie is assembled.
  • the resilient soleplate placed between the block and the rigid cover forms a second elastic stage.
  • An object of the invention is to improve the vibration attenuation performance of the above-mentioned tie, in particular in a range of frequencies up to 250 hertz (Hz), which is considered as being capable of generating nuisance for surrounding buildings, while also limiting the fatigue and the stress to which the rail system is subjected.
  • Hz hertz
  • the invention provides a tie of the above-specified type, wherein the resilient soleplate has dynamic stiffness k2 lying in the range 6 kilonewtons per millimeter (kN/mm) to 10 kN/mm, preferably in the range 6 kN/mm to 8 kN/mm.
  • the resilient soleplate has a substantially plane top face and a substantially plane bottom face
  • the block has four peripheral faces that connect the top face to the bottom face, the tie including resilient pads disposed between each peripheral face of the block and the peripheral rim of the cover;
  • the resilient pads comprise at least two longitudinal resilient pads of dynamic stiffness lying in the range 20 kN/mm to 25 kN/mm, and at least two transverse resilient pads of dynamic stiffness lying in the range 15 kN/mm to 18 kN/mm;
  • said tie includes, on the top face of the rigid block, a resilient bearing element of dynamic stiffness lying in the range 120 kN/mm to 300 kN/mm, preferably in the range 200 kN/mm to 300 kN/mm, the resilient bearing element being designed to receive the rail bearing thereagainst;
  • the tie comprises a single block and a single cover
  • the block presents weight in the range 350 kilograms (kg) to 450 kg, preferably in the range 400 kg to 450 kg;
  • the tie comprises two blocks, two respective covers associated therewith, and a transverse spacer interconnecting the two blocks;
  • each block has weight lying in the range 100 kg to 150 kg, preferably in the range 130 kg to 150 kg.
  • the invention also provides a rail track segment including a tie as described above and at least one rail bearing on the tie.
  • FIG. 1 is a diagrammatic cross-section view of a segment of rail track in a first embodiment
  • FIG. 2 is a more detailed diagrammatic cross-section view of the tie of FIG. 1 shown in section;
  • FIG. 3 is a diagrammatic longitudinal section view of the tie of FIGS. 1 and 2 ;
  • FIG. 4 is a diagram modeling the FIG. 1 segment of rail track
  • FIG. 5 is a graph showing the acoustic performance of a tie of the invention.
  • FIG. 6 is a view analogous to FIG. 1 and showing a segment of rail track in a second embodiment.
  • FIG. 1 A segment 2 of rail track in a first embodiment of the invention is shown diagrammatically in FIG. 1 .
  • the segment 2 comprises two longitudinal rails 4 fastened on a tie 8 .
  • the tie 8 comprises a single rigid concrete block 9 and two resilient bearing elements 10 disposed between each rail 4 and the block 9 .
  • the longitudinal rails 4 define a reference for the longitudinal direction.
  • the resilient bearing elements 10 are substantially in the form of rectangular parallelepipeds. In the example shown in FIG. 1 , their width is substantially equal to the width of the base of the rail 4 , and their length is substantially equal to the width of the block 9 .
  • each recess 12 in the block 9 The resilient bearing elements 10 are received in respective recesses 12 in the block 9 .
  • the profile of each recess 12 in cross-section is substantially rectangular.
  • the width and the length of each recess 12 in the example shown in FIG. 1 are substantially equal to the width and the length respectively of a resilient bearing element 10 .
  • the resilient bearing elements 10 are adhesively bonded to the tie 8 .
  • Each rail 4 is attached to the block 9 by means of rail fasteners (not shown) that prevent any transverse displacement of the rail relative to the block 9 and that secure the rail 4 with the block 9 and with each resilient bearing element 10 .
  • dynamic stiffness is always considered as being constant and substantially equal to 130% of static stiffness.
  • the resilient bearing elements 10 form a first elastic stage 14 of vertical dynamic stiffness k1 as shown in the model of FIG. 4 .
  • Each rail 4 is modeled as being suspended on a first end of a spring 16 of dynamic stiffness k1.
  • the second end of the spring 16 is linked to the block 9 .
  • Each resilient bearing element 10 has dynamic stiffness k1 lying in the range 120 kN/mm to 300 kN/mm, and preferably in the range 200 kN/mm to 300 kN/mm.
  • the material used for each resilient bearing element 10 is: rubber, polyurethane, or any other elastic material.
  • the tie 8 of FIG. 1 shown in detail in FIGS. 2 and 3 , comprises a cover 20 for receiving the block 9 , a resilient soleplate 22 disposed in a substantially horizontal plane between the block 9 and the cover 20 , and four resilient pads 24 , 26 disposed in respective substantially vertical planes between the block 9 and the cover 20 .
  • the block 9 is substantially in the form of a rectangular parallelepiped and essentially comprises a top face 32 , a substantially plane bottom face 34 on which it rests, and four peripheral faces 36 , 38 connecting the top face 32 to the bottom face 34 via respectively a rounded edge 44 and a chamfer 46 .
  • the peripheral faces 36 , 38 comprise two longitudinal peripheral faces 36 and two transverse peripheral faces 38 .
  • Each peripheral face 36 , 38 has a substantially plane bottom portion 36 A, 38 A, and a substantially plane top portion 36 B, 38 B, with a substantially plane intermediate portion 36 C, 38 C interconnecting each bottom portion 36 A, 38 A to its corresponding top portion 36 B, 38 B.
  • the longitudinal top portions 36 B and the transverse top portions 38 B converge mutually upwards.
  • the longitudinal bottom portions 36 A and the transverse bottom portions 38 A converge mutually downwards.
  • the longitudinal intermediate portions 36 C and the transverse intermediate portions 38 C converge mutually downwards, forming an angle relative to the vertical plane that is greater than the angle formed by each corresponding bottom portion 36 A, 38 A.
  • the block 9 is selected to be of particularly great weight. Its weight lies in the range 350 kg to 450 kg, and preferably in the range 400 kg to 450 kg. The weight of the block 9 is conventionally increased by adding metal elements in the concrete.
  • the cover 20 is formed by a substantially rigid shell.
  • the cover 20 essentially comprises a bottom 48 and a continuous peripheral rim 50 going round the bottom 48 .
  • the bottom 48 presents a substantially plane and rectangular top face 52 .
  • the peripheral rim 50 of the cover 20 has four panels 54 , 56 .
  • the four panels 54 , 56 comprise two longitudinal panels 54 associated respectively with the longitudinal faces 36 of the block 9 , and two transverse panels 56 associated respectively with the transverse faces 38 .
  • Each panel 54 , 56 has a respective inside face 62 , 64 .
  • Each inside face 62 , 64 includes a housing 66 , 68 substantially in the shape of a rectangular parallelepiped, each for receiving a respective resilient pad 24 , 26 .
  • the housings 66 , 68 are substantially parallel to the corresponding bottom portions 36 A, 38 A of the peripheral faces 36 , 38 of the block 9 .
  • Each housing 66 , 68 presents a rectangular periphery defined by a continuous peripheral shoulder 66 A, 68 A.
  • Each housing 66 , 68 is also of substantially the same height and the same length as the bottom portions 36 A, 38 A with which it is associated.
  • Each inside face 62 , 64 has a top portion 62 A, 64 A that is plane and of inclination relative to the vertical that is substantially equal to or greater than the inclination of the corresponding intermediate portions 36 C, 38 C of the peripheral faces 36 , 38 of the block 9 .
  • the top portions 62 A, 64 A are of substantially the same height as the corresponding associated intermediate portions 36 C, 38 C of the block 9 .
  • top portions 62 A, 64 A of the inside faces 62 , 64 of the panels 54 , 56 are connected to a continuous top edge 70 of the rim 50 .
  • the top edge 70 presents two fingers serving to fasten a continuous sealing gasket 72 .
  • the gasket 72 is made of natural or synthetic rubber. It provides sealing between the block 9 and the cover 20 without impeding displacement of the block 9 in the cover 20 . It is also possible to make the sealing gasket 72 by casting a material such as silicone or polyurethane in the form of a continuous bead.
  • the stiffness of the cover 20 is reinforced by ribs 74 formed in relief on the outsides of the panels 54 , 56 , and in part under the bottom 48 .
  • ribs 74 are molded integrally with the cover 20 .
  • These ribs 74 may be of any suitable shape and of any suitable disposition relative to the cover 20 , in a manner that is known in the state of the art, in particular from EP-A-0 919 666.
  • the cover 20 is made as a one-piece molding.
  • the cover 20 could be made by assembling together a plurality of partial shells, as disclosed in the state of the art (e.g. EP-A-0 919 066).
  • these might comprise, for example two half-shells, one at each end, and a central shell interconnecting the two end half-shells.
  • the cover 20 is made of molded thermoplastic material or of resin concrete.
  • the resilient soleplate 22 is substantially in the form of a rectangular parallelepiped and has substantially plane top and bottom faces for minimizing the mechanical stresses to which the resilient soleplate 22 is subjected and avoids problems of fatigue. Its length and width are substantially equal respectively to the length and the width of the bottom face 34 of the block 9 .
  • the resilient soleplate 22 thus remains in an elastic domain; which corresponds substantially to a maximum amount of deformation that is less than or equal to 40%.
  • the amount of deformation is the ratio of thickness variation presented by the resilient soleplate 22 between a free state and a loaded state.
  • the resilient soleplate 22 forms a second elastic stage 78 of vertical dynamic stiffness k2 as shown in the model of FIG. 4 .
  • the rigid block 9 is modeled as being suspended on the first ends of two springs 80 of dynamic stiffness k2.
  • the second ends of the springs 80 are linked to the cover 20 .
  • the resilient soleplate 22 of the invention has dynamic stiffness k2 that is less than the dynamic stiffness of the devices that are conventionally used.
  • the dynamic stiffness k2 lies in the range 6 kN/mm to 10 kN/mm, and preferably in the range 6 kN/mm to 8 kN/mm.
  • the resilient soleplate 22 is made of a cellular elastomer material.
  • the resilient soleplate 22 has vertical dynamic stiffness k2 that is substantially uniform over its entire area.
  • the resilient soleplate 22 has vertical dynamic stiffness k 3 in a central zone of the block 9 that is less than or equal to k2.
  • the central zone comprises the middle of the block 9 and extends transversely on either side of the middle of the block 9 towards the ends over substantially half of the area of the block 9 . Since this central zone is less stressed, it is possible therein to use a material that is more elastic and therefore less expensive.
  • the resilient soleplate 22 can rest freely on the bottom 48 of the cover 20 . It can thus easily be removed from the cover 20 .
  • the tie 8 also has a substantially incompressible thickness piece 82 , as shown in FIGS. 2 and 3 .
  • the thickness piece 82 is substantially in the form of a rectangular parallelepiped. Its length and its width are substantially equal to the length and the width of the top face 52 of the bottom 48 of the cover 20 . Its thickness is less than or equal to 10 mm, and preferably lies in the range 2 mm to 4 mm.
  • the thickness piece 82 rests freely on the bottom 48 of the cover 20 . It can thus be removed easily from the cover 20 , or it can be added to the cover 20 , in order to adjust the leveling of the track.
  • the resilient soleplate 22 rests freely on the thickness piece 82 .
  • the surface of the thickness piece 82 is sufficiently rough to avoid the resilient soleplate 22 sliding in the cover 20 .
  • this roughness is obtained by means of serrations, diamond tips, or barbs.
  • Each resilient pad 24 , 26 presents an outside face 24 A, 26 A and an inside face 24 B, 26 B, and four peripheral faces.
  • the outside and inside faces 24 A, 26 A and 24 B, 26 B are of substantially the same dimensions and they present an outline that is substantially rectangular.
  • the outside and inside faces 24 A, 26 A and 24 B, 26 B are of length and width that are substantially equal respectively to the length and the width of the corresponding housings 66 , 68 in the peripheral rim 50 of the cover 20 .
  • the resilient pads 24 , 26 are faced in the corresponding housings 66 , 68 . By way of example, they are held by friction between the peripheral faces of the resilient pads 24 , 26 and the peripheral shoulder 66 A, 68 A of each housing 66 , 68 . The resilient pads 24 , 26 can thus be removed easily.
  • Each resilient pad 24 , 26 may also be held by snap-fastening.
  • the housings 66 , 68 may have grooves and the resilient pads 24 , 26 may have complementary fluting.
  • the resilient pads 24 , 26 present thickness greater than the depth of the housings 66 , 68 so that they project relative to the shoulders 66 A, 68 A.
  • the inside faces 24 B, 26 B merely press against the corresponding bottom portions 36 A, 38 A of the peripheral faces 36 , 38 of the rigid block 9 .
  • the inside faces 24 B, 26 B are provided with grooves increasing their flexibility.
  • the resilient pads 24 , 26 have dynamic stiffness in the range 12 kN/mm to 25 kN/mm.
  • they are made of rubber, polyurethane, or any other elastic material.
  • the longitudinal pads 24 corresponding to the longitudinal peripheral spaces 36 are subjected to greater forces than the transverse pads 26 corresponding to the transverse peripheral faces 38 .
  • the longitudinal pads 24 can thus advantageously be selected to have dynamic stiffness greater than that of the transverse pads 26 .
  • the longitudinal pads 24 have dynamic stiffness lying in the range 20 kN/mm to 25 kN/mm, for example, while the transverse pads 26 have dynamic stiffness lying in the range 15 kN/mm to 18 kN/mm.
  • the resilient pads 24 , 26 hold the block 9 away from the inside faces 62 , 64 of the cover 20 .
  • the resilient pads 24 , 26 thus provide horizontal damping for the block 9 . This horizontal damping is decoupled from the vertical damping obtained by the resilient bearing elements 10 and the resilient soleplate 22 .
  • the number of resilient pads is not limiting.
  • the tie 8 may have two transverse pads 34 side by side on each side of the block 9 .
  • FIG. 5 shows the acoustic performance of a prior art tie and of a tie in accordance with the invention.
  • FIG. 5 plots insertion gain as a function of frequency. Insertion gain in this example is the ratio expressed in decibels (dB) between the value of a measured magnitude (speed, acceleration, force, etc.) obtained when a resilient soleplate is included and the value obtained when it is not included (see French standard ISO 14837-1:2005). In the example described, this is the force exerted on the cover 20 . A reduction in the value of the magnitude is expressed by insertion gain having a negative sign.
  • dB decibels
  • the cut-off frequency is the frequency beyond which insertion gain is observed to decrease.
  • k1 dyn is the dynamic stiffness of the resilient bearing elements 10
  • k2 dyn is the dynamic stiffness of the resilient soleplate 22
  • M is the weight of the block 9 .
  • the vibration attenuation performance is substantially the same.
  • the insertion gain is a few dB greater than for the curve S 1 .
  • the insertion gain is several dB less than that of the curve S 1 .
  • the cut-off frequency is lower than that of the curve S 1 (20 Hz instead of 32 Hz).
  • the tie 108 comprises two rigid blocks 109 interconnected by a spacer 184 .
  • the same references are used in FIG. 6 as the references used in FIGS. 1 to 4 , but with the addition of 100.
  • the length of the covers 120 is adapted to receive the blocks 109 .
  • FIGS. 2 and 3 which show a single-block tie 8 are also entirely applicable for illustrating a tie 108 .
  • the main difference between the single-block tie 8 and the two-block tie 108 lies in the presence of a spacer 184 penetrating into the two blocks 109 .
  • the spacer 184 is of a shape adapted to obtain a second moment of area that is large.
  • the spacer 184 may be in the form of an angle bar or of a cylinder.
  • the spacer 184 has a cross-sectional area lying in the range 800 square millimeters (mm 2 ) to 1500 mm 2 , and thickness lying in the range 6 mm to 10 mm.
  • it may be made out of a steel complying with the standard EN 13230-3.
  • Each block 109 has weight lying in the range 100 kg to 150 kg, preferably in the range 130 kg to 150 kg.
  • the single-block tie 8 is particularly good at withstanding the additional mechanical stresses that result from the invention.
  • the reduction in the dynamic stiffness k2 of the resilient soleplate 22 , 122 serves to obtain better vibration attenuation performance, in particular by lowering the cut-off frequency and by lowering the insertion gain in the range 25 Hz to 250 Hz.
  • the increase in the weight of the block 9 , 109 also makes it possible, for given dynamic stiffness k2 of the resilient soleplate 22 , 122 , to lower the cut-off frequency and thus to improve the performance of the tie 8 , 108 at low frequencies. Nevertheless, above a certain weight, the mechanical stresses to which the tie 8 , 108 are subjected become too great.
  • the increase in the dynamic stiffness k1 of the resilient bearing elements 10 , 110 decreases the insertion gain in the range 200 Hz to 250 Hz and shifts the resonant frequency towards higher frequencies, with the resonant frequency being the frequency at which the insertion gain is observed to rise.
  • the invention thus makes it possible to approach the vibration attenuation performance obtained with a floating slab having its cut-off frequency lying in the range 14 Hz to 20 Hz, and having insertion gain of ⁇ 25 dB situated at 63 Hz.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Railway Tracks (AREA)
  • Vibration Prevention Devices (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Bridges Or Land Bridges (AREA)
  • Sliding-Contact Bearings (AREA)
  • Braking Arrangements (AREA)
  • Mechanical Operated Clutches (AREA)
  • Soft Magnetic Materials (AREA)
  • Magnetic Heads (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Heat Treatment Of Articles (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
US11/903,389 2006-09-22 2007-09-21 Rail track tie Abandoned US20080083835A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0608356 2006-09-22
FR0608356A FR2906269B1 (fr) 2006-09-22 2006-09-22 Traverse de chemin de fer

Publications (1)

Publication Number Publication Date
US20080083835A1 true US20080083835A1 (en) 2008-04-10

Family

ID=37969667

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/903,389 Abandoned US20080083835A1 (en) 2006-09-22 2007-09-21 Rail track tie

Country Status (18)

Country Link
US (1) US20080083835A1 (fr)
EP (1) EP1905896B1 (fr)
JP (1) JP2008101456A (fr)
KR (1) KR20080027450A (fr)
CN (1) CN101165272A (fr)
AT (1) ATE464431T1 (fr)
AU (1) AU2007216806B2 (fr)
BR (1) BRPI0702998B1 (fr)
CA (1) CA2598637C (fr)
DE (1) DE602007005892D1 (fr)
ES (1) ES2341300T3 (fr)
FR (1) FR2906269B1 (fr)
MX (1) MX2007009521A (fr)
NZ (1) NZ561705A (fr)
PL (1) PL1905896T3 (fr)
RU (1) RU2487207C2 (fr)
SG (1) SG141363A1 (fr)
TW (1) TWI427208B (fr)

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US20100102194A1 (en) * 2002-05-21 2010-04-29 Haynes David F Variable Stiffness Support
DE102009019683A1 (de) 2009-04-30 2010-11-04 Pahnke, Ulf, Dr.-Ing. Dynamisch optimiertes Schottergleis mit Querschwellen aus Spannbeton
US20100320281A1 (en) * 2008-03-06 2010-12-23 Getzner Werkstoffe Holding Gmbh Tie foundation for a railway tie
US20120104110A1 (en) * 2010-10-27 2012-05-03 Roberts Jr Richard W Recyclable Plastic Structural Articles And Method Of Manufacture
US8708177B2 (en) 2012-03-29 2014-04-29 Richard W. Roberts In-situ foam core dielectrically-resistant systems and method of manufacture
US8752773B2 (en) 2011-07-28 2014-06-17 Voestalpine Nortrak Inc. Grade crossing interface pad
US8840819B2 (en) 2012-03-28 2014-09-23 Richard W. Roberts, JR. In-situ foam core structural energy management system and method of manufacture
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US20150204023A1 (en) * 2014-01-21 2015-07-23 Voestalpine Nortrak Inc. Grade crossing interface pad
US9102086B2 (en) 2012-03-28 2015-08-11 Richard W. Roberts In-situ foam core structural articles and methods of manufacture of profiles
US20160017544A1 (en) * 2013-03-11 2016-01-21 Sonneville Ag Sleeper block unit for railway track systems
US9271610B2 (en) 2013-04-12 2016-03-01 Richard W. Roberts, JR. Bathtub/shower tray support
US9272484B2 (en) 2012-01-25 2016-03-01 Richard W. Roberts, JR. Structural plastic articles, method of use, and methods of manufacture
US9346237B2 (en) 2010-10-27 2016-05-24 Richard W. Roberts Recyclable plastic structural articles and method of manufacture
US20180127922A1 (en) * 2014-11-19 2018-05-10 Getzner Werkstoffe Holding Gmbh Sleeper pad
US10207606B2 (en) 2012-03-28 2019-02-19 Richard W. Roberts Recyclable plastic structural articles and method of manufacture
US10328662B2 (en) 2012-11-01 2019-06-25 Richard W. Roberts In-situ foam core stress mitigation component and method of manufacture
US10352000B2 (en) 2016-04-28 2019-07-16 Construction Polymers Technologies, Inc. Band for railway track block and boot combination
US10590609B2 (en) 2016-03-18 2020-03-17 Alstom Transport Technologies Shell cross-member system and railway section including such a system
US10786971B2 (en) 2010-10-27 2020-09-29 Richard W. Roberts Method for making a running board having an in-situ foam core
US11427970B2 (en) 2017-11-21 2022-08-30 Getzner Werkstoffe Holding Gmbh Switch
EP4083320A1 (fr) 2021-04-28 2022-11-02 Johannes Stephanides Traverse de rail

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DE102009000316A1 (de) 2009-01-20 2010-07-22 Semperit Ag Holding Schwellenschuh für Querschwellen
DK2545219T3 (en) * 2010-03-12 2015-01-26 Rst Rail Systems And Technologies Gmbh Concrete element with a plastic plate on the underside
RU2521913C2 (ru) * 2012-04-26 2014-07-10 Общество с ограниченной ответственностью "МЕТРО-СТИЛЬ 2000" Верхнее строение рельсового пути
JP6097554B2 (ja) * 2012-12-25 2017-03-15 積水化学工業株式会社 まくら木
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CN103147369A (zh) * 2013-03-29 2013-06-12 无锡恒畅铁路轨枕有限公司 弹性混凝土轨枕
CN106320101B (zh) * 2016-08-23 2018-05-18 毛建红 一种预制混凝土铁轨基座及其制备方法
FR3067369B1 (fr) * 2017-06-07 2019-08-09 Sateba Systeme Vagneux Traverse a coque rigide amelioree pour voie de chemin de fer
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EP1905896A1 (fr) 2008-04-02
BRPI0702998A8 (pt) 2016-08-16
TWI427208B (zh) 2014-02-21
EP1905896B1 (fr) 2010-04-14
CA2598637C (fr) 2015-04-21
FR2906269B1 (fr) 2008-12-19
ATE464431T1 (de) 2010-04-15
BRPI0702998B1 (pt) 2019-05-21
AU2007216806B2 (en) 2013-09-26
PL1905896T3 (pl) 2010-09-30
MX2007009521A (es) 2009-02-04
FR2906269A1 (fr) 2008-03-28
SG141363A1 (en) 2008-04-28
TW200829752A (en) 2008-07-16
AU2007216806A1 (en) 2008-04-10
ES2341300T3 (es) 2010-06-17
CN101165272A (zh) 2008-04-23
BRPI0702998A (pt) 2008-05-13
DE602007005892D1 (de) 2010-05-27
NZ561705A (en) 2009-04-30
CA2598637A1 (fr) 2008-03-22
JP2008101456A (ja) 2008-05-01

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