NL2006044C2 - Method for manufacturing an embedded rail track. - Google Patents
Method for manufacturing an embedded rail track. Download PDFInfo
- Publication number
- NL2006044C2 NL2006044C2 NL2006044A NL2006044A NL2006044C2 NL 2006044 C2 NL2006044 C2 NL 2006044C2 NL 2006044 A NL2006044 A NL 2006044A NL 2006044 A NL2006044 A NL 2006044A NL 2006044 C2 NL2006044 C2 NL 2006044C2
- Authority
- NL
- Netherlands
- Prior art keywords
- rail
- concrete
- bed
- blocks
- elastic
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
- E01B19/003—Means for reducing the development or propagation of noise
-
- 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
-
- 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
- E01B29/005—Making of concrete parts of the track in situ
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Railway Tracks (AREA)
Description
P30544NL00
METHOD FOR MANUFACTURING AN EMBEDDED RAIL TRACK
The present invention relates to a method for manufacturing an embedded rail track with a continuous and elastically supported rail embedded in a continuous concrete track bed. Such embedded rail systems are generally known in the field of railway tracks for e.g. train, tram, metro, crane and other railbound vehicle applications. The resilient behaviour of the elastic 5 support for the rails, both in vertical and lateral direction, e.g. allows for reduction of noise and vibration.
In a known manufacturing method first a concrete track bed is made, e.g. using a slipform machine, with open-topped channels wherein the rails is placed. Then a pourable resilient 10 compound is poured. This compound cures over time in the channel with the rail. This compound remains permanent elastic. The compound bonds to the rail and in cured state provides continuous vertical and horizontal elastic support to the rail.
In another approach rails which are covered on the sides of the web and underneath the foot 15 by a rubber jacket are held in pre-aligned condition by use of portals from which they are suspended. Then the concrete track bed, or at least the top layer thereof, is poured so that the rails with rubber jackets are embedded in the track bed. The rubber material, commonly made of scrap rubber, provides permanent elastic support both in vertical and lateral direction for the rail.
20
The present invention aims to provide an improved method for manufacturing an embedded rail track with a continuous and elastically supported rail embedded in a continuous concrete track bed.
25 The present invention achieves this aim by providing a method according to claim 1.
In the method one or more pre-aligned rails are provided with filler blocks on opposed sides of the web as well as with an elastic strip underneath the foot, and a concrete track bed is poured and allowed to harden thereby embedding said one or more pre-aligned rails in the 30 concrete track bed.
At the boundary between each filler block and the hardened concrete track bed a layer of the filler block is removed by machining to create a void, preferably down to the level of the -2- elastic strip. These voids that are created by said machining are then filled by pouring into the voids a pourable resilient compound which cures over time and has permanent elasticity.
In the method according to the invention the filler blocks can be of low cost as they need not 5 have a permanent elastic property to obtain the desired elastic support of the rail. The presence of the filler blocks - after the machining step - allows for the use of a limited volume of rather expensive resilient compound to obtain the desired permanent elastic support for the rail, which elastic support is in lateral direction primarily determined by said compound and in vertical direction by the elastic strip underneath the foot of the rail.
10
In a practical embodiment the filler blocks and the elastic strip are separate parts, that are mounted onto the rail, e.g. by clamping. In an alternative embodiment the filler blocks and elastic strip are interconnected similar to a jacket or the elastic strip is integrated with one of the filler blocks.
15
In a practical embodiment the filler blocks have a length between 0.5 and 3 meters, e.g. 1.2 meter.
In a preferred embodiment the filler blocks are made of a plastic foam material, more 20 preferably a rigid plastic foam material, e.g. a polyurethane rigid foam.
The method of the invention allows to achieve a good electrical insulation of the rail, as the compound preferably has an electrical insulating property and fills any joints between the filler blocks, possibly also joints between the elastic strip and the filler blocks. This is e.g.
25 beneficial in view of electrical stray currents, e.g. when the track is used for a metro or tram.
In a practical embodiment the machining of the filler blocks is performed by a brush, preferably a rotating steel wire disc brush. The brush will gradually remove material from the filler block, the thickness of the brush preferably being such that it corresponds to the 30 thickness of the layer to be removed from the filler blocks. A machine having two spaced apart brushes or other machining tools may be used to remove the layers at both sides simultaneously. As an alternative a rotating disc saw may be used or any other suitable machining tool.
35 In a preferred embodiment the filler blocks each have a top portion that covers the respective lateral side of the rail head prior to the pouring of the concrete, and - after the concrete track bed has hardened - the top portion of each filler block is removed. The void created by the -3- removal of each top portion is also filled with said pourable resilient compound. Possibly the void created by removal of a top portion is filled with another compound than the void at the lateral side of the filler block. This avoids contact between the rail head and the machining tool.
5
In a preferred embodiment the top portions of the filler blocks each have a greater lateral dimension than the thickness of the layer of the filler block that is removed by machining at said boundary with the concrete.
10 In a preferred embodiment the filler blocks each have a lower portion that covers or overlaps at least partially the lateral side of the elastic strip that is present underneath the foot, and the removal by machining of said layer of filler block includes removal of said lower portion. In this manner the void at the boundary can be made - if desired - to extend just as deep in the concrete track bed as the bottom side of the elastic strip. This e.g. enhances the electrical 15 insulation and/or the lateral elastic support.
It is preferred that - after removal of the layers of the filler blocks at the boundary with the concrete - spacer elements, preferably elastic spacer elements, are placed between the filler blocks and the concrete track bed to maintain the position of the rail prior to pouring of the 20 resilient compound. It is envisaged that elastic spacers remain in place and so become embedded in the compound.
To obtain a reliable adherence of the compound to the rail head and to the concrete track bed opposite said rail head - prior to pouring the resilient compound - the sides of the rail 25 head and opposed portions of the concrete track bed are cleaned and preferably treated with a primer that enhances the bond with the compound. Due to the high quality adherence e.g. ingress of water can be avoided.
In a preferred embodiment use is made of support and alignment portals or jiggs from which 30 the rail or rails is/are kept suspended during the pouring of the concrete track bed. This is known in the art as the top - down method.
In a possible embodiment the filler blocks have a preformed cut therein which separates the top portion to be removed from the remainder of the filler block except for a bridge near the 35 lateral face of the filler block, such that upon removal by machining of said layer at the boundary with the track bed said bridge is fully or at least for 50% removed, thereby -4- facilitating the removal of said top portion. This e.g. allows to predefine the size of the top portion that is to be removed, e.g. avoiding the removal of an undersized top portion.
The invention also relates to an embedded rail track with one or more continuous elastically 5 supported rails manufactured according to the invention.
The invention also relates to a filler block which is advantageously used in the method according to the invention, the filler block, e.g. of hard plastic foam material, having a portion to be introduced in a longitudinal recess of the rails between the rail head and the foot, and a 10 top portion that covers the respective lateral side of the rail head, the filler block having a preformed cut therein which separates the top portion to be removed from the remainder of the filler block except for a bridge near the outer side face of the filler block. The invention also relates to the combination of a rail and such a filler block.
15 The invention also relates to a filler block which is advantageously used in the method according to the invention, the filler block, e.g. of hard plastic foam material, having a portion to be introduced in a longitudinal recess of the rails between the rail head and the foot, and a top portion that covers the respective lateral side of the rail head, the filler block having a preformed cut therein at the side to be introduced in the recess of the rails, the cut providing 20 flexibility to said portion of the filler block so that the filler block remains in place based on the clamping effect. The invention also relates to the combination of a rail and such a filler block.
The invention will now be explained with reference to the drawings. In the drawings:
Figure 1 shows schematically in cross-section an example of a rail to be integrated in an 25 embedded rail track manufactured according to the invention,
Figure 2 the rail with elastic strip clamped onto the foot of the rail,
Figure 3 the rail of figure 2 after mounting of preferred embodiments of the filler blocks,
Figure 4 the rail after pouring of the concrete track bed,
Figure 5 the track bed and rail of figure 4 after the step of removal by machining of the layers 30 of the filler blocks at the boundary with the concrete track bed,
Figure 6 illustrates the removal of the top portion of each of the filler blocks,
Figure 7 illustrates the placement of spacers between the filler blocks and the concrete track bed,
Figure 8 illustrates the cleaning and coating with a primer of the lateral side of the rail head 35 and the laterally opposed surface of the concrete,
Figure 9 shows the rail and track bed after the filling of the voids with the resilient compound.
-5-
Figure 1 shows an example of a steel rail 1 for a rail-bound vehicle, e.g. for tram, metro, train, etc. The rail 1 is destined to be integrated in an embedded rail track, e.g. with two parallel rails 1, with continuous elastically supported rails that are embedded in a continuous concrete track bed.
5
The rail 1 has a head 2, a web 3, and a foot 4. In this example, as seen in cross-section of the rail 1, the head 2 and the foot 4 are substantially broader than the web 3, so that on each lateral side of the rail 1 there is a longitudinal recess 6, 7.
The rail 1 shown as an example here is a so-called grooved rail having a groove 10 in the rail 10 head 2.
The rail 1 may also have a different shape, e.g. without groove 10 and/or with other dimensions of the rail head, web, and/or foot.
In figure 2 an example of an elastic strip 15 has been mounted onto the rail 1 and extends 15 underneath the foot 4. In this example the strip 15 has lateral flanges 15a, b that are adapted to be clamped around the lateral sides of the foot 4.
The strip is of elastic material that is suitable to provide continuous elastic support in vertical direction for the rail 1. These strips 15 are known in the art and can have a static and dynamic stiffness depending on the desired elastic properties of the rail support.
20
In figure 3 it is shown that filler blocks 20 and 25 are mounted to the rail 1. Here, as is preferred, the filler blocks 20, 25 are clampingly fitted in the recesses 6, 7.
In an embodiment the strip 15 could extend on the upper side of the foot on both sides of the 25 web of the rail, a filler block then clamping the strip onto the upper face of the foot.
In an embodiment the strip 15 has no lateral clamping flanges 15a, b but is held by another clamping member onto the rail, or by an adhesive. In an embodiment an additional clamping strip is provided that has clamping flanges 15a, b, the elastic strip 15 being arranged between said additional clamping strip and the rail foot 4.
30
As is preferred the filler blocks 20, 25 are of rigid material, as the blocks themselves do not need to have permanent elastic properties that contribute to the elastic support for the rail 1. Preferably the filler blocks 20, 25 do not include rubber.
In a preferred embodiment that blocks 20, 25 are made of a plastic foam material, most 35 preferably a rigid plastic foam material, such as rigid polyurethane foam.
In a possible embodiment such blocks 20, 25 are cut from thick sheets or plates of rigid plastic foam material.
-6-
Preferably the filler blocks have a very low water absorption.
Preferably the filler blocks 20, 25 have a length between 0.5 and 3 metres to facilitate handling of the blocks 20, 25 during installation.
5 In this example the rigid foam filler blocks 20, 25 have a preformed cut 21 therein at the side to be introduced and clamped in the recess of the rail. The cut 21 is adapted to provide some flexibility to said portion of the block 20, 25 so that the filler block will remain in place based on the clamping effect alone on the pre-aligned rail.
10 The lateral sides of the filler blocks 20, 25 are shown here to be planar and parallel. However other embodiments are also possible, e.g. with non-parallel and/or non-planar vertical sides, e.g. the lateral sides tapering upwards to a smaller cross-sectional dimension of the assembly and/or the lateral sides having one or more longitudinal ribs or other formations that cause an uneven surface in the concrete, e.g. to enhance the engagement of the 15 compound with the concrete track bed.
If desired the elastic strip 15 and/or the filler blocks 20, 25 can also be held in a different, possibly temporary, manner on the rail 1, e.g. using adhesive, clips, tie-wraps, etc prior to the pouring of the concrete into which the assembly of figure 3 is to be embedded..
20
As can be seen in figure 3 the filler blocks 20, 25 are - as is a preferred embodiment -shaped such that they each have a top portion 20a, 25a that covers the respective lateral side of the rail head 2. As is preferred, these top portions 20a, 25a are later removed prior to the pouring of the compound.
25
As can be seen in figure 3 the filler blocks 20, 25 are - as is a preferred embodiment -shaped such that they each have a lower portion 20b, 25b that covers the side of the elastic strip 15. Here, as is preferred, the lower portion 20b, 25b extends down to the bottom side of the strip 15, but an embodiment with less overlap in vertical direction between the strip 15 30 and the lower portion 20b, 25b is also possible. Then the concrete will lock-in the elastic strip 15 in horizontal direction, which may be beneficial.
In this example, as is preferred, the filler blocks 20, 25 each have a preformed cut 27 therein which separates the top portion 20a, 25a to be removed from the remainder of the filler block 35 except for a bridge near the outer side face of the filler block.
-7-
The assembly in the condition as shown in figure 3 is held in a pre-aligned state prior to the pouring of the concrete in which the assembly is to be embedded. As is known in the art, the top - down method can be used, wherein use is made of support and alignment portals or jigs (not shown) from which the assembly, or commonly multiple assemblies at the correct 5 gauge between the rails, is suspended, e.g. above a concrete foundation that was installed earlier.
In an alternative approach other support and alignment members are used to hold the assembly to be embedded at the correct pre-aligned position prior to pouring of the concrete.
10 Figure 4 illustrates that the concrete 30 has been poured, here underneath and at each of the sides of the assembly of figure 3. In this example the concrete is poured up to the top face of the filler blocks 20, 25. If desired the top level of the concrete track bed could be lower, e.g. allowing for an additional cover layer, e.g. a non concrete road surface, to be placed on top of the concrete track bed.
15 The poured concrete 30 is now allowed to harden.
Figure 5 illustrates the step of removing a layer of the lateral side of the filler block by machining away said layer at the boundary between each filler block and the concrete track bed. As is shown in figure 5 in this manner a void 40, 45, preferably narrow and deep slot, is 20 formed. As is preferred the machining is performed so deep that even the lower portions 20b, 25b are removed, although it is also possible to perform the machining to a lower depth so that some of said lower portions are left behind.
In a practical embodiment the layer to be removed from each filler block 20, 25 by machining 25 at the boundary with the concrete track bed has a thickness of between 5 and 25 millimetres, preferably between 10 and 25 millimetres, e.g. about 15 millimetres. It will be appreciated that the thickness of the layer that is removed relates to the thickness of the layer of compound that is filled into the void, and thereby to the finally obtained elastic support of the rail.
30
As is preferred the machining is performed with a brush, preferably a rotating disc brush, e.g. a steel wire disc brush. A suitable machine has a motor driven shaft on which such a brush can be mounted. It is envisaged that an embodiment of the filler block made of rigid plastic foam can well be machined with such a brush. An advantage of the disc brush is that the 35 side face of the concrete is also brushed and loose particles are removed. As an alternative a disc saw can be used to machine away said side layers of the filler blocks. A vacuum device may be used to suck away the machined filler particles.
-8-
If desired the filler blocks 20, 25 may include one or more preformed cuts, cut-outs or internal cavities in the region of the layer to be machined away. This may e.g. reduce the volume of filler block to be removed, the energy needed for said removal, or be otherwise be beneficial 5 for the removal by machining and/or the adherence to the compound that is poured later into the voids.
Here, as is preferred, the top portion 20a, 25a of the filler blocks each have a greater lateral dimension than the thickness of the layer of the filler block that is removed by machining at 10 said boundary.
In the embodiment of the filler blocks 20, 25 with the top portion 20a, 25a and the associated preformed cut in the filler block, the machining step may lead to the complete or at least 50% removal of the bridge that was present in the filler block between said top portion and the 15 remainder of the filler block. In figure 5 it is suggested that a fraction of said bridge is let intact. Now with minimal effort the remains of the filler blocks can be removed, e.g. by some pulling action, as is illustrated in figure 6.
The cut now forms a predefined surface of the void to be filled with compound near the rail 20 head 2.
Due to the removal of the layers from the vertical outer sides of the filler blocks 20, 25 the assembly with the rail 1 now has a reduced sideways stability. In order to avoid undue sideways shifting of the rail, it is preferred to introduce at selected positions along the track 25 spacers 50 in the voids between the filler blocks 20, 25 and the opposed face of the concrete track bed, e.g. wedge shaped spacers.
Preferably said spacers 50 are made of elastic material, e.g. from the same material as the compound to be poured into the void, and are to be embedded in the compound 30 permanently. Their presence then does not disturb the desired elastic property of the lateral support for the rail 1.
As is preferred - prior to the pouring of the compound into the voids 40, 45 - extra measures are taken to enhance the adhesion of said compound to the lateral side of the rail head 2 and 35 the opposed surface of the concrete track bed. This is done to counter ingress of water, most desirable if prevention of electrical stray currents is desired.
-9-
For example the lateral side of the rail head 2 and said opposed surface (indicated with arrows A) are cleaned and coated with a suitable primer. This is illustrated in figure 8.
Figure 9 shows the embedded rail system after the resilient compound 60 has been poured 5 into the voids 40, 45. It can be seen that the void created by removal of each top portion 20a, 25b is also filled with said pourable resilient compound.
The compound may for example be a polyurethane based compound, e.g. including cork granules.
The compound cures over time and forms a layer that remains permanently elastic, and 10 thereby provides a continuous elastic support primarily in lateral direction for the rail 1.
It is envisaged that once the manufacturing of the rail system is completed no fasteners are present between the rails and the concrete track bed as is known in the art.
15 If the filler blocks 20, 25b were absent far more elastic compound would have been needed, which is more expensive and less efficient than with the method according to the invention. The filler blocks 20, 25 need not be elastic themselves, and thus can be made of a rather cheap material, such as rigid plastic foam. The machining step to remove the layers from the filler blocks can be effected quite rapidly and cost-efficient.
20
As mentioned above a concrete foundation bed may be present prior to the rails with elastic strip and filler blocks being aligned above said concrete foundation bed. Then an upper bed portion of concrete is poured on top of the foundation bed which forms the lower bed portion so as to embed the one or more pre-aligned rails in the concrete track bed. In another 25 approach a monolithic concrete track bed is poured in one pouring action. Possibly a road surface layer is placed on top of the concrete track bed, e.g. an asphalt layer, paving blocks, possibly prior to the step of filling the voids with the pourable compound.
In an embodiment of the method parallel pre-aligned rails are interconnected by transverse 30 gauge rods at intervals along the length of the rails, said gauge rods preferably being sheathed by a permanent elastic sheath, e.g. a tubular sheath, prior to the pouring of the concrete track bed. The sheathed gauge rods then also become embedded in the concrete track bed. The gauge rod may extend through the filler block or through a specially designed filler block to be arranged at the location where the gauge rod is connected to the rail. When 35 removing by machining the layer of filler block at the boundary with the concrete at the side of the gauge rod, it is possible that a portion of said layer below the gauge rod may remains in place and only the portion of the filler block above the gauge rod is removed.
-10-
It will be appreciated that the pre-aligned rail or rails may be combined with rail fixtures, e.g. a water drainage element, e.g. a drainage box fitted to a rail or a drainage element extending transverse between rails. It is envisaged that such elements are sheathed with a permanent 5 elastic sheath or e.g. with a sheathing, e.g. of filler block material, that is subjected to the same process including layer removal at the boundary with the concrete as explained above.
Claims (18)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2006044A NL2006044C2 (en) | 2011-01-21 | 2011-01-21 | Method for manufacturing an embedded rail track. |
EP12703611.9A EP2665864B1 (en) | 2011-01-21 | 2012-01-20 | Method for manufacturing an embedded rail track |
PCT/NL2012/050034 WO2012099473A1 (en) | 2011-01-21 | 2012-01-20 | Method for manufacturing an embedded rail track |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2006044A NL2006044C2 (en) | 2011-01-21 | 2011-01-21 | Method for manufacturing an embedded rail track. |
NL2006044 | 2011-01-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
NL2006044C2 true NL2006044C2 (en) | 2012-07-24 |
Family
ID=44512360
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL2006044A NL2006044C2 (en) | 2011-01-21 | 2011-01-21 | Method for manufacturing an embedded rail track. |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2665864B1 (en) |
NL (1) | NL2006044C2 (en) |
WO (1) | WO2012099473A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108046662A (en) * | 2017-12-15 | 2018-05-18 | 成都市新筑路桥机械股份有限公司 | It is a kind of for elastic concrete of embedded tracks and preparation method thereof |
CN110777573A (en) * | 2019-11-13 | 2020-02-11 | 成都市新筑路桥机械股份有限公司 | Embedded type vibration and noise reduction component for track and construction method thereof |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN105133439B (en) * | 2015-09-30 | 2017-05-31 | 成都市新筑路桥机械股份有限公司 | A kind of embedded ballastless track system for afforesting section |
CN106638181A (en) * | 2015-10-30 | 2017-05-10 | 中国铁道科学研究院铁道建筑研究所 | Edge sealing formwork corner exhausting device for slab-type ballastless track self-compacting concrete |
CN105463952A (en) * | 2015-12-16 | 2016-04-06 | 西南交通大学 | Novel vibration-isolation noise-reduction flexible rail web covering part for modern tram |
CN107313307A (en) * | 2017-08-18 | 2017-11-03 | 中车青岛四方车辆研究所有限公司 | The modular construction method of tramcar anti-corrosion track |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29802914U1 (en) * | 1998-02-19 | 1999-06-17 | DVG Deutsche Verpackungsmittel GmbH, 90552 Röthenbach | Chamber filler stone for rails, especially tram rails |
EP1916336A1 (en) * | 2006-10-19 | 2008-04-30 | Plastiform's | Isolierungs- und Versiegelungsvorrichtung für ein auf Schwellen montiertes Gleis, insbesondere für eine Strassenbahn-Gleiskonstruktion |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1988213A1 (en) | 2007-05-02 | 2008-11-05 | edilon)(sedra B.V. | Prefabricated rail supporting element |
-
2011
- 2011-01-21 NL NL2006044A patent/NL2006044C2/en not_active IP Right Cessation
-
2012
- 2012-01-20 WO PCT/NL2012/050034 patent/WO2012099473A1/en active Application Filing
- 2012-01-20 EP EP12703611.9A patent/EP2665864B1/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29802914U1 (en) * | 1998-02-19 | 1999-06-17 | DVG Deutsche Verpackungsmittel GmbH, 90552 Röthenbach | Chamber filler stone for rails, especially tram rails |
EP1916336A1 (en) * | 2006-10-19 | 2008-04-30 | Plastiform's | Isolierungs- und Versiegelungsvorrichtung für ein auf Schwellen montiertes Gleis, insbesondere für eine Strassenbahn-Gleiskonstruktion |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108046662A (en) * | 2017-12-15 | 2018-05-18 | 成都市新筑路桥机械股份有限公司 | It is a kind of for elastic concrete of embedded tracks and preparation method thereof |
CN110777573A (en) * | 2019-11-13 | 2020-02-11 | 成都市新筑路桥机械股份有限公司 | Embedded type vibration and noise reduction component for track and construction method thereof |
Also Published As
Publication number | Publication date |
---|---|
WO2012099473A1 (en) | 2012-07-26 |
EP2665864A1 (en) | 2013-11-27 |
EP2665864B1 (en) | 2015-08-19 |
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