NL2007388C2

NL2007388C2 - Resilient rail support block assembly and manufacturing thereof.

Info

Publication number: NL2007388C2
Application number: NL2007388A
Authority: NL
Inventors: Gerrit Marinus Houwen; Willem Pieter Schram
Original assignee: Edilon Sedra B V
Priority date: 2011-09-09
Filing date: 2011-09-09
Publication date: 2013-03-12
Also published as: EP2753755A1; WO2013036120A1

Description

P30916NL00

RESILIENT RAIL SUPPORT BLOCK ASSEMBLY AND MANUFACTURING THEREOF

The present invention relates to the field of resiliently supporting rails of a railway track, such as for trains, underground, trams, etc.

In the field of railway track technology resilient rail support systems have been developed to 5 reduce hinder, in particular noise and vibration, from passing railway vehicles.

In a known arrangement a rail of a railway track is supported on rail support blocks arranged at intervals under the rail. These blocks are embedded in a concrete slab. The slab is commonly poured around the blocks, but it is also known to place the blocks in 10 corresponding cavities in a slab. To reduce noise and vibrations resulting from rail vehicles passing over the railway a resilient elastomeric boot member is present between each block and the slab.

In a known system developed by the present applicant a resilient rail support block assembly 15 is manufactured, which is ready to be mounted to the rail to be supported. The assembly includes a concrete block adapted for fastening the rail on the top of the block. This assembly further includes a concrete tray extending below and spaced from the bottom of the block as well as around and spaced from the lower region of the peripheral wall of the block. A resilient material, such as sold under the trade name Corkelast, has been poured 20 during manufacture of the assembly between the concrete tray and the block. Upon polymerisation (while maintaining its resilient property) the resilient material adheres to the concrete block and concrete tray and thus bonds said tray to the block. When installing a rail, the known rail support block assemblies are positioned at intervals along the rails and fastened thereto. Thereafter a slab of concrete is poured, so that the concrete trays are 25 embedded in and become integral with the slab. This method is known in the art as the “fix and forget method”.

For the installation of a lengthy stretch of railway a very large number of such railway support block assemblies is required. Due to their weight it is preferred to organize the manufacture 30 of the assemblies at a factory for concrete building products located relative close to the railway installation site. In practice this approach is faced with difficulties in the manufacturing of the railway support block assemblies. In particular it has been found difficult to establish a reliable quality of the assemblies, especially with regard to the adherence of the components -2- in the known assembly. In detail it has been found difficult to control the adherence between the concrete block, the concrete tray and the pourable resilient material as quite extensive pre-treatment steps, e.g. of the concrete surfaces are required.

5 This adherence is considered important by the applicant as during its service life the resilient material of the assembly is subjected to cyclic compression and relaxation. Should the adherence deteriorate or fail completely the block is as it were “released” from slab. This considered undesirable, as the rail itself is then no longer connected to the slab in a satisfactory manner. In addition water/fuel or other liquids will be able to enter between the 10 components that are no longer (sufficiently) bonded and a “pump action” will result upon each passage of a rail vehicle. This causes noise and vibration disturbance, and also leads to wear and damage which then has to be resolved with maintenance activities.

In documents W02008/040549 and W02009/104948 improved resilient railway support 15 block assemblies and improved manufacturing methods therefore are disclosed. These assemblies include a resilient tray member as well as a rail supporting block, wherein the tray member has a bottom wall the extends under the block and a raised side wall that extends at least along a lower region of the peripheral wall of the block.

20 For a railway installation project a large number of such block assemblies are needed. This causes the need for efficiency both in production of the assemblies and in the logistics. Also the cost price is relevant in view of the numbers of assemblies that are needed.

The present invention aims to provide yet another improved manufacturing method for 25 resilient rail support block assemblies to achieve one or more of the above objects or to at least provide an alternative to prior art solutions.

The present invention provides a method according to claim 1.

30 In this method at least one of the bottom wall and the side wall of the resilient tray member, preferably the bottom wall as well as the side wall, is manufactured as a sandwich type wall by providing a plate of resilient foam material having an inner face and an outer face, and by providing anchoring sheet portions having a 3-dimensional open structure, at least open on an outer face of said sheet, and by securing said anchoring sheet portions respectively on 35 said inner face and outer face of the plate of resilient foam material.

-3-

This method e.g. allows to manufacture at a first production location, e.g. in a company specialized in manufacturing of resilient railway support products, a shipment of bottom walls and side walls of the tray member from plates and anchoring sheets. These products are then kept in planar state, e.g. stacked on a transport pallet, and then transported, e.g. by 5 road, rail or airfreight, to a second, remote location that is preferably close to the railway installation site. Preferably a said second location a concrete facility is present, which is suitable to pour the blocks from concrete.

It will be appreciated that shipping the bottom walls and side walls in planar form, greatly reduces transport volume and handling issues, compared to shipped prefabricated tray 10 members in their tray shape.

It will be appreciated that the production of the bottom wall and side wall of the tray member according to this method can be efficiently performed with a relatively simple and not expensive tooling. Suitable resilient foam plate material is readily available, e.g. polyurethane 15 foam, and can be cut to shape with well known tooling, e.g. using a water-jet cutting tool.

As disclosed in W02009/104948 the 3-dimensional open structure is preferably chosen for its ability to adhere to concrete, mortar, or another hardening compound in order to secure the assembly to rail support block and to the railway substructure, e.g. a concrete railway 20 bed. It is noted that different anchoring sheet materials may be used within a single tray member, e.g. one version for the inner faces and one version for the outer faces. For reasons of efficiency it is preferred to use the same anchoring sheet material for the inner and outer faces of the tray member.

The open structure of the anchoring sheet portions provides for a multitude of 25 openings/interstices so that concrete or other pourable material can enter into said openings/interstices and so enhance the anchoring. For instance the sheet is provided on its surface with loops (e.g. of plastic or metal filament), mushroom-shape projections or other shapes of hooks or anchoring members (e.g. as in hook and loop fasteners).

30 As is preferred the 3-dimensional open structured anchoring sheet material is supplied from a roll of such material. Sheet materials commonly used as geotextile, e.g. for draining, may be employed as anchoring sheet material. Such materials are readily available and can also be easily cut to the desired shape.

35 Securing the anchoring sheet of the respective face of the plate can be done with a suitable adhesive, e.g. sprayed or painted onto one or more the faces to be adhered, but other securing methods, e.g. with staples, welding techniques, etc. are also possible.

-4-

In an embodiment the resilient tray member is erected so as to have bottom wall and a raised side wall, at least one of the bottom wall and the raised side wall being of the sandwich type. The erected tray member is then used as a block mould or at least as part of 5 a block mould or is placed in a block mould, such that said tray member, possibly with one or more additional block mould members combined with said prefabricated resilient member, delimits the mould cavity for the block. The mouldable material is then introduced into said mould cavity and thereby adheres directly to the one or more anchoring sheet portions on the inner face of the resilient tray member.

10 This method can e.g. be envisaged in the methods disclosed in W02009/104948, which is incorporated by reference herein.

In a preferred embodiment use is made of a monolithic plate of resilient foam material which has a portion that forms the bottom wall as well one or more portions that form the raised 15 side wall or part thereof. For example the bottom wall is rectangular and the four side wall portions are each integral with an associated side of the bottom wall, e.g. shaped as a cross.

In an embodiment wherein the bottom wall is monolithic with one or more side wall portions of the tray member, the plate is preferably provided with one or more fold lines that allow to 20 erect the tray, preferably a fold line being formed as a groove, preferably a 90 degrees V-shape, in the plate. For example a fold line is made by machining the plate, e.g. milling. The groove may extend throughout the thickness of the plate, but if desired the groove may be less deep so that a thin section of the plate remains.

25 In an embodiment of the invention the bottom wall of the tray member is manufactured as a separate part, and the side wall of the tray member is manufactured as one or more other separate parts, preferably all said parts having a sandwich type structure. So then the bottom is separate from the side wall part or parts, which may be advantageous for reasons of economy of the use of the plate material, as well as allow for yet another attractive 30 manufacturing method.

In an embodiment starting with separately manufactured bottom wall and one or more side wall parts of the tray member use is made of a block mould having a bottom mould wall, a peripheral mould wall, and an open top opposite the bottom mould wall. Then the one of more separate parts that form the side wall of the tray member are arranged in the mould 35 along the respective portion of the peripheral mould wall. The mouldable material, e.g.

concrete, is then poured into the block mould, preferably via the open top thereof, so that it adheres directly to one or more anchoring sheet portions on the inner faces of the one or -5- more parts that form the side wall of the tray member. Once the mould is filled to the desired level with the mouldable material the pouring is stopped. Then, possibly after levelling the top face of the poured material, the part forming the bottom wall of the tray member is placed on top of the poured mouldable material so that the material adheres directly to anchoring sheet 5 portion on the inner face of the bottom wall of the tray member. It is noted that vibrations may be used during this process to enhance the quality of the poured block as is known in the art.

In an embodiment - prior to the pouring of the mouldable material that forms the block - one or more reinforcement elements, preferably of metal, are positioned in a block mould so as to 10 obtain a reinforced block.

In an embodiment - prior to the pouring of the mouldable material that forms the block - one or more rail fastening members are positioned with at least a portion thereof within the mould cavity, so that said one or more rail fastening members are directly integrated in the block 15 and fixed to the block material.

In an embodiment the anchoring sheet material is in majority made of Polyethylene (PE), preferably high density Polyethylene (HDPE).

20 In an embodiment the anchoring sheet material has an inner backing layer that is secured to the plate material, e.g. with an adhesive. In an embodiment the open structure is provided by elements of the anchoring sheet material that are provided on the outer face of the backing layer, the backing layer being far less open structured.

25 In an embodiment the anchoring sheet material has an inner backing layer and a multitude of parallel wire ribs connected to the backing layer by spacers that hold the wire ribs at a distance from the backing layer.

In an embodiment the anchoring sheet material is a protective drainage membrane marketed 30 under the trade name Tenax PRT, by Tenax Spa Italy.

In an embodiment the block is moulded so as to have a lower portion around which the tray member side wall extends and an upper portion upwardly protruding from the tray member.

35 In an embodiment use is made of a block mould to form the block, wherein an elastic plate which will lie under the rail is positioned within the block mould prior to the introduction of the mouldable material, so that said elastic plate is directly integrated in the block.

-6-

In an embodiment use is made of a block mould, and wherein at least one transverse tie bar securing element is positioned so as to extend at least partly within the block mould prior to the introduction of the mouldable material, so said transverse tie bar securing element is 5 directly integrated in the block.

The invention also allows to have the manufacturing of the plate with anchoring sheets to take place by a specialized company in a controlled environment. In this manner perfect quality of the resilient member can be ensured.

10

It will be appreciated that it is preferred that the block is poured so as to adhere directly to the anchoring sheets on the inner face of the tray member as the block material hardens. However, it is also possible that the block has been pre-fabricated and is then combined with the tray member, e.g. by fixing the block to the tray member with an adhesive, e.g. by 15 pouring an adhesive or mortar, such as e.g. a suitable epoxy, between the block and the tray member.

The present invention also relates to a resilient rail support block assembly according to claim 17. In this assembly at least one of the bottom wall and the side wall of the resilient tray 20 member, preferably the bottom wall as well as the side wall, has been manufactured as a sandwich type wall with a plate of resilient foam material having an inner face and an outer face and with anchoring sheet portions having a 3-dimensional open structure, at least open on an outer face of said sheet, which anchoring sheet portions are secured respectively on said inner face and outer face of the plate of resilient foam material.

25

The resilient tray member will be of advantage when used to provide a sound and/or vibration attenuating support of the block when the assembly is embedded in a concrete slab or mounted in or on another substructure.

30 The tray member preferably allows for elastic motion of the block in all directions.

For instance the plate material can a polyurethane elastomer, such as e.g. Corkelast made by the applicant.

35 The invention will be discussed in more detail below referring to the drawings. In the drawings: -7-

Fig. 1 shows an example of rail support block assembly according to the invention and a rail supported thereon,

Figs. 2a, b show an example of a resilient foam plate with anchoring sheet secured on opposed faces thereof in planar state and ready to be erected to form a resilient tray 5 member,

Fig.3a shows in cross-section an example in the region of a fold line between the bottom wall and a side wall portion of a resilient tray member,

Fig. 3b in a view similar to figure 3a a possible embodiment,

Figs. 4a, b, c, a resilient tray member in side views and in top view, 10 Fig. 5 a portion of Tenax anchoring sheet material in perspective view,

Fig. 6 shows another example of a rail support block assembly according to the invention, Fig. 7 shows a block mould for use in the production of the assembly of figure 6, as well as two rail fastening members of said assembly, figs. 8a, b show the side wall of the tray member of the assembly of figure 6, in partly folded 15 state as well as in a state wherein it forms a closed annular member,

Fig. 9 the mould of figure 7 with the side wall of the tray member in closed annular state placed in said mould, and with the fastening members in position,

Fig. 10 the mould of figure 9 with reinforcement bars placed in the mould, ready for pouring the mouldable material, 20 Fig. 11a the mould of figure 10 after the mouldable material has been poured into the mould to the desired level,

Fig. 11b the bottom wall of the tray member that is ready to be placed directly onto the top surface of the still wet material that has been poured into the mould,

Fig. 12 the mould of figure 11 a after the bottom wall of the tray member is placed on top of 25 the non-hardened poured material,

Fig. 13 an example of a rail support block assembly according to the invention, supporting a rail and being embedded in a concrete track bed.

In figure 1 an example of a rail support block assembly 1 according to the invention and a rail 30 2 supported thereon is shown.

For example, and as depicted in this figure, the assembly 1 should be able to serve in railways lines as specified in UIC code 700, “Classification of lines and resulting load limits for wagons”, a relevant code of the International Union of Railways.

35

The assembly comprises a resilient tray member 10 and a rail support block 20.

-8-

The resilient tray member 10 has a bottom wall 11, here as is preferred a rectangular bottom wall, and a raised side wall 12 extending upwards from the bottom.

As is preferred the side wall 12 is a peripheral side wall, but it is also envisaged that the side 5 wall does not extend as a complete annulus, e.g. one side being open as depicted in figure 7 of Wo2008/040549.

The resilient tray member 10 is open from above.

10 The moulded block 20 is made of a suitable mouldable material, preferably of concrete, e.g. a polymer concrete. The block 20 has a top 21, a bottom and a peripheral wall 22. The block 20 is provided with one or more rail fastener members 23 adapted for fastening one or more rails on the top of said block.

15 As will be appreciated the bottom wall 11 of the resilient tray member 10 extends under the bottom of the moulded block, and the raised side wall 12 of the resilient tray member 10 extends along at least a lower region of the peripheral wall of the block 20.

The skilled person will appreciate that other general shapes of the tray member are also 20 possible, for instance depending on the shape of the block, such as an oval outer contour, a trapezium shaped outer contour, a hexagonal block, etc.

Figures 2a and 2b show a possibility to manufacture the tray member 10.

25 Here a monolithic plate 13 of suitable resilient foam material, e.g. a polyurethane foam material, is shaped in the form of a cross and the opposed main faces of the plate 13 are each covered by anchoring sheet portions 14, 15 that are secured to the respective inner and outer face of the plate 13. This sandwich structure can readily be recognized in the figures 3a and 3b where a portion of the sheets covered plate is shown in cross-section.

30

The side wall 12 in this example will be formed by the side wall portions 12a, b, c, d, that are now each integral with the bottom wall portion 11 via a connecting side.

As shown in figures 2 and 3 the connection between the bottom wall and the integral side 35 wall portion is formed by a fold line, here, as is preferred, embodied as a groove 16. As most preferred the groove 16 is V-shaped, most preferred a 90° shaped groove in cross-section.

-9-

Of course other angles are also possible, e.g. to arrive at an outward or inward inclining position of the side wall portion.

As can be seen in figures 3a, b the anchoring sheets 14, 15 here each have a backing layer 5 secured to the respective face of the plate 13 and the backing layer supports a 3-dimensional open structured layer.

In figure 5 a portion of a preferred embodiment of the anchoring sheet is shown, with backing layer 30, and with a multitude of parallel wire ribs 31 that are connected to the backing layer 10 30 by spacers 32 that hold the wire ribs 31 at a distance from the backing layer. A

commercially available product with this structure is Tenax PRT marketed by Tenax Spa in Italy.

For example the open structure has a thickness between 2 and 8 millimeters, e.g.

15 approximately 5 millimeters.

As will be appreciated the open structure allows the pourable material, e.g. of the rail support block when on the inside of the tray member, or e.g. of the railway bed when on the outside, to enter in the openings/interstices provided by the anchoring sheet. Once said material 20 hardens a strong and durable mechanical connection is obtained.

It will be appreciated that the plate product shown in figure 2 allows to easily erect a resilient tray member so as to have bottom wall and a raised side wall. Then both the bottom wall and the raised side wall are of the sandwich type with anchoring sheet portions on both the inner 25 face and the outer face.

This erected tray member can be used as a block mould or at least as part of a block mould or be placed in a block mould, e.g. as explained in WO 2009/104948. This allows for the tray member, possibly with one or more additional block mould members combined with said 30 resilient tray member 10, to delimit a mould cavity for the block 20. The mouldable material, e.g. concrete, is then introduced into said mould cavity and thereby adheres directly to the one or more anchoring sheet portions on the inner face of the resilient tray member 10.

With reference to figures 6-12 now another example of a method and assembly according 35 to the invention will be discussed.

- 10-

Figure 6 shows rail support block assembly 40 having a tray member 50 and a rail support block 60, here of concrete as is preferred in this invention.

The block 60 is provided with two rail fastening members 61, here bolt receiving bushings 5 embedded in the block 60.

The top of the block 60 is formed to accommodate a rail (not shown) thereon, e.g. secured as shown in figure 13.

10 As is preferred, both the outer and inner face of the tray member 50 is provided with anchoring sheet portions 14, 15 that sandwich a plate 13 of resilient foam material between them such as has been explained above. This sandwich structure can be recognized at the top edge of the tray member in figure 6.

15 Figure 7 shows a block mould 70 for use in the production of the assembly of figure 6, as well as two rail fastening members 61 of said assembly.

The mould 70 has a bottom mould wall 72 and a peripheral mould wall 71. The block mould has an open top opposite the bottom mould wall in order to pour the block 60 in “upside 20 down orientation”.

Figure 8a shows that the side wall of the tray member 50 is not monolithic with the bottom wall of the tray member, but is manufactured as one or more separate parts of sandwich structure. In this example side wall parts 60a, b, c, d are made as one part with appropriate 25 fold lines 60e, f, g.

Figure 8b shows this part 60a, b, c, d when it is folded to form a closed annular member. This part is then placed in the mould 70 so that the side wall parts 60a-d each extend along an associated portion of the peripheral wall 71 of the mould as shown in figure 9.

30 Also the fastening members 61 have been positioned at least partly in the mould cavity so that they become embedded in the block.

Then one or more reinforcement members 80, here metal rods, are placed in the mould cavity in order to strengthen the block 60. This is illustrated in figure 10.

35 -11 -

Then the concrete is poured into the mould cavity, embedding the fastening members and any reinforcement members. The wet concrete enters into the open structure of the anchoring sheet portions, so that it provides a strong bond when the concrete hardens.

5 The part forming the bottom wall 52 of the tray member is placed on top 82 of the poured mouldable material so that the material adheres directly to anchoring sheet portion on the inner face of the bottom wall 52 of the tray member. This is illustrated in figures 11a and 12.

Once the concrete has sufficiently hardened the block assembly can be removed from the 10 mould 70.

The block assembly can then be transported to the (preferably nearby) railway installation site, where the rail is secured on the top face of the block and where the assembly is integrated in the railway base, e.g. in the concrete track bed. The anchoring portions on the 15 outer face of the tray member then provide a secure mechanical connection, just as explained with reference to the connection between the block and the tray member. This is illustrated in figure 13

As is shown here the block is moulded so as to have a lower portion around which the tray 20 member side wall 13 extends and an upper portion upwardly protruding from the tray member.

If desired an elastic plate which will lie directly under the rail may be positioned within the block mould prior to the introduction of the mouldable material, so that said elastic plate is 25 directly integrated in the block.

If desired at least one transverse tie bar securing element may be positioned so as to extend at least partly within the block mould prior to the introduction of the mouldable material, so said transverse tie bar securing element is directly integrated in the block.

30

In the examples shown here the block is adapted as a monobloc for supporting a single rail of a railway track, but the block could also be designed as a duo-block supporting two or even more rails (as a railway sleeper).

Claims

Method for manufacturing an elastic rail carrier block assembly (1), which assembly is arranged to be embedded in a substructure for a rail track, for example a concrete rail bed, and which assembly comprises: - an elastic baking member (10; 50) with a bottom wall (11), preferably a rectangular bottom wall, and an upright side wall (12) that is raised from the bottom, the side wall preferably being a peripheral side wall, the elastic baking member being open from above, - a molded block (20; 60) of suitable castable material, preferably of concrete, which block has a top side, a bottom side and a circumferential wall, the block being provided with one or more rail mounting members adapted to fix one or more rails on the top side of the block, wherein the bottom wall of the elastic frying member extends below the bottom side of the molded block, and wherein the upright side wall of the elastic The baking member extends at least along a lower area of the circumferential wall of the block, wherein at least one of the bottom wall and the side wall of the elastic baking member, preferably both the bottom wall and the side wall, is made as a sandwich-type wall by providing a plate (13) of elastic foam material with an inside and an outside, and by providing anchoring field portions (14, 15) with a three-dimensional open structure, at least open on an outer surface of the sheet, and by securing said anchoring field portions respectively on the inside and the outside of the sheet of elastic foam material.

2. Method as claimed in claim 1, wherein the elastic baking member (10) is erected so as to have a bottom wall and an upright side wall, wherein at least one of the bottom wall and the upright side wall is of the sandwich type, and wherein the erected baking member is used as a mold for the block or at least as part of a block mold or is placed in a block mold such that the baking member, possibly with one or more additional block mold members combined with the baking member (10), limits the molding cavity for the block (20), wherein pourable material is introduced into said casting cavity and thereby directly adheres to the one or more anchorage field portions on the inner surface of the elastic frying member (10). - 13-

Method according to claim 2, wherein use is made of a monolithic plate (13) of elastic foam material which has a part (11) that forms the bottom wall and one or more parts (12a-d) that form the upright side wall or part thereof wherein the plate is then provided with one or more fold lines that make it possible to raise the tray, preferably a fold line (16) formed as a groove, preferably a 90 ° V shape, in the plate.

4. Method as claimed in claim 1 or 2, wherein the bottom wall (52) of the baking member (50) is manufactured as a separate part, and wherein the side wall (51) of the baking member is manufactured as one or more separate parts, wherein preferably all those parts (51, 52) have a sandwich construction.

5. Method as claimed in claim 4, wherein use is made of a block mold (70) with a bottom mold wall, a circumferential mold wall (71), and wherein the block mold has an open top opposite the bottom mold wall, wherein the one or more separate parts (51) forming the side wall of the baking member in the mold are arranged along the corresponding portions of the circumferential mold wall, the moldable material being molded into the block mold so that it is directly attached to one or more anchoring field parts on the inner surfaces of the one or more parts (51) the side wall 20 of the frying member adhere, and wherein the part (52) forming the bottom wall of the frying member is placed on top of the molded castable material so that the material adheres directly to the anchoring field portion on the inner surface of the bottom wall of the frying member.

The method according to claim 2 or 5, wherein prior to casting the castable material, one or more reinforcing elements (80), preferably of metal, are positioned in the block mold so as to obtain a reinforced block.

7. Method according to claim 2 or 5 or 6, wherein prior to the casting of the pourable material, the one or more rail mounting members (61) are placed in the casting cavity at least with a part thereof, so that the one or more rail mounting members are directly integrated are attached to the block and to the block material.

8. Method as claimed in one or more of the foregoing claims, wherein the plate (13) of elastic foam material is made of polyurethane foam material. - 14-

Method according to one or more of the preceding claims, wherein the anchoring sheet material (14, 15) is supplied from a roll of the sheet material.

10. Method as claimed in one or more of the foregoing claims, wherein the anchoring sheet material (14,15) has an inner backing layer which is attached to the plate material, for example with an adhesive.

A method according to any one of the preceding claims, wherein the anchoring sheet material has an inner backing layer (30) and a plurality of parallel wire ribs (31) connected to the backing layer by spacers (32) spaced apart from the backing layer by the wire ribs to hold.

12. Method according to one or more of the preceding claims, wherein the anchoring sheet material (14,15; 30,31,32) is essentially made of polyethylene (PE), preferably high-density polyethylene (HDPE).

13. Method as claimed in one or more of the foregoing claims, wherein at a first production location a batch of bottom walls and side walls of the baking member is manufactured from said plates and anchoring sheets, and wherein said batch is transported - with the manufactured bottom walls and side walls in flat condition - to a second production location located away, preferably close to the installation location for the railway track, wherein blocks are cast at that second location and combined with the bottom walls and the side walls.

14. Method as claimed in one or more of the foregoing claims, wherein the block (20; 60) is molded to have a lower part around which the frying member side wall extends and an upper part protruding upwards above the frying member.

15. Method as claimed in one or more of the foregoing claims, wherein use is made of a block mold to form the block, and wherein an elastic plate which will lie under the rail in the block mold is arranged prior to the introduction of the castable material , so that the elastic plate is integrated directly into the block. - 15-

16. Method according to one or more of the preceding claims, wherein use is made of a block mold, and wherein at least one mounting element for a cross-connecting rod is arranged such that it extends at least partially in the block mold prior to the insertion of the castable material so that the fastening element for the crossbar is directly integrated in the block.

17. Elastic rail carrier block assembly (1), which assembly is arranged to be embedded in a substructure for a railway track, preferably a concrete spoiler track bed, and which assembly comprises: - an elastic baking member (10; 50) with a bottom wall (11) ), preferably a rectangular bottom wall, and an upright side wall (12) that is raised from the bottom, the side wall preferably being a peripheral side wall, the elastic frying member being open from above, - a molded block (20; 60) of suitably castable material, preferably of concrete, which block has a top side, a bottom side and a circumferential wall, the block being provided with one or more rail mounting members adapted to secure one or more rails on the top side of the block, wherein the bottom wall of the elastic frying member extends below the bottom side of the molded block, and wherein the upright side wall of the elastic frying member extends at least along an extends from the bottom region of the peripheral wall of the block, wherein at least one of the bottom wall and the side wall of the elastic frying member, preferably both the bottom wall and the side wall, is manufactured as a sandwich-type wall by providing a plate of elastic foam material with an inside and an outside and with anchoring field parts with a three-dimensional open structure, at least open to an outer surface of the sheet, which anchoring field parts are fixed respectively on the inside and the outside of the plate of elastic foam material.