EA014736B1 - Resilient rail support block assembly - Google Patents

Abstract

A prefabricated resilient member for in a rail support block assembly, which assembly is adapted to be mounted embedded in or mounted on a railway substructure. The assembly comprises said resilient member (1) as well as a block having a top (10), a bottom and peripheral wall, said block being adapted for fastening one or more rails on the top of said block. The prefabricated resilient member is adapted to be fixed to said block so as to extend under said bottom of the block as well as around at least a lower region of the peripheral wall of the block. The prefabricated resilient member (1) has an outer tray (2) and inner tray (3) arranged within said outer tray, and said prefabricated resilient member comprises a resilient intermediate structure (5) being arranged between said outer and inner trays.

Description

The present invention relates to supports for rails of railway tracks for trains, subways, trams, etc.

In the field of railways, technical systems have been developed to reduce interference, in particular noise and vibration.

In the known device, the rail of the railway track rests on the supporting blocks of the rail, located at some intervals under the rail. These blocks are embedded in a concrete slab. The slab is usually poured around the blocks, but it is also known to place the blocks in the corresponding cavities in the slab. To reduce noise and vibration resulting from the passage of railway vehicles by rail, an elastic element is located between each block and plate.

In the known system developed by the present applicant, an assembly of an elastic rail support block is made, ready for installation on a rail, for which it is necessary to provide support. The assembly includes a concrete block adapted to mount the rail on top of the block. This assembly additionally includes a concrete pallet extending below and around the block and placed with a gap between the bottom of the block and the lower region of the peripheral wall of the block. Elastic material, such as those sold under the brand name Sogksky. poured during the manufacture of the assembly between the concrete pallet and the block. After polymerization (while maintaining elastic properties), the elastic material adheres to the concrete of the block and the concrete of the pallet and, thus, binds said pallet to the block. When installing the rail, the known support blocks of the rail are installed in the desired position at intervals along the rails and attached to them. Then pour the concrete slab for embedding concrete pallets into it and form a single whole with the slab. This method is known in the art as a fixed and forgotten method.

To install a long section of the railway requires a very large number of such assemblies of the supporting blocks of the railway. Owing to their weight, it is preferable to organize the manufacture of assemblies in a concrete plant located relatively close to the railway construction site. In practice, with such an approach, one encounters difficulties in manufacturing assemblies of supporting blocks of the railway. In particular, it has proved difficult to achieve reliable assembly quality, especially with regard to bonding components in a known assembly. In detail, it turned out to be difficult to control the bonding between the concrete block, the concrete pallet and the flowing elastic material, since this requires very extensive pre-treatment steps, for example, concrete surfaces.

The applicant considers this bonding necessary, since during the service life the assembly of the elastic material undergoes cyclic compression and stress relieving. If gluing is broken or completely out of order, the block is released from the slab. This is considered undesirable since the rail is no longer properly connected to the plate. In addition, water / fuel or other liquids are allowed to enter between components that are no longer connected (enough) and the suction action will be the result of each passage of the railway vehicle. This causes an increase in noise and vibration, and also leads to wear and damage, which must be eliminated during the repair process.

EP 919666 discloses a system in which a rail support block is housed in a prefabricated pallet, for example, plastic or concrete. The pallet is configured to be embedded in a concrete slab. In the pallet are elastic elements, specifically, between the pallet and the bottom of the block and between each side face of the pallet and the opposite face of the block. The attachment of the pallet with its elastic elements to the block is based on the clamping forces created by preliminary compression of the elastic elements by the block when placing it in the pallet.

In this system, known from EP 919666, it is possible to remove a block from a pallet integrated in the plate to replace the block, for example, if it is damaged. Such removal can be easily accomplished by lifting the unit from the pallet. To prevent the ingress of water and the like between the pallet and the block, a number of alternative solutions have been proposed, including pouring silicone filling material into the space between the block and the pallet with associated elastic elements supporting the block.

The aim of the present invention is to propose one or more measures providing an improved assembly of a railway elastic support block and / or an improved method for its manufacture.

An additional objective of the present invention is to provide a manufacturing method by which it is possible to economically produce high quality assemblies.

The present invention has created a prefabricated resilient member for assembling an elastic rail support block, wherein the assembly is configured to be installed on or installed on the lower structure of the railway track and comprises said resilient member as well as a block having a top, bottom and a peripheral wall, and said block is configured to fasten one or more rails on top of said block, and a prefabricated resilient member is configured to be attached to said the block so as to pass under said bottom of the block, as well as around at least the lower part of the peripheral wall

- 1 014736 blocks.

According to the invention, the prefabricated resilient element comprises an external pallet and an inner pallet located in said outer pallet, wherein said prefabricated resilient element further comprises an elastic intermediate structure located between said outer and inner pallets.

The present invention further relates to a method for manufacturing an assembly of a rail support block, in which a resilient member according to the invention is prefabricated, a block is manufactured, and then the block is secured to the inner pallet of the resilient member.

In a preferred embodiment of the practical implementation of the aforementioned manufacturing method, the elastic element is produced at the first site, preferably at a company specializing in elastic intermediate structures used in the railway, and the block is manufactured at a second, remote site, preferably at a company specializing in the manufacture of concrete building products. Then the block is placed in the inner pallet of the elastic element, preferably on the second platform, and the block is glued to the inner pallet. The completed assembly of the railway support block is then transported to the installation site on the railway.

Preferably, the block is attached to the inner pallet using an adhesive, for example, by pouring an adhesive or mortar, for example, a suitable epoxy, between the block and the inner pallet.

The advantage created by the elastic element according to the invention is that the manufacture of the said element can be performed by a specialized company in controlled external conditions. With this mode, you can ensure the highest quality of the elastic element. The process step for creating an algesia between the inner pallet and the block is considered less complex and sensitive than the bonding described above between fluid elastic material and concrete components, as discussed with reference to the prior art assembly of the applicants. Thus, the mentioned adhesion can be carried out at the place of production of the concrete block or even at another site (for example, at the construction site of the railway).

Below the invention is described in more detail with reference to the accompanying drawings.

In the drawings:

in FIG. 1 shows an example of a rail support block and an example of a prefabricated resilient member according to the invention;

in FIG. 2 is an assembly according to the invention, consisting of a block and an elastic element according to FIG. 1, while the elastic element is fastened to the block;

in FIG. 3 - rail equipped with the assembly according to FIG. 2, before embedding in a concrete slab;

in FIG. 4 - rail according to FIG. 3 with an assembly built into a concrete slab;

in FIG. 5 - rail system with a sleeper resting on a prefabricated elastic element according to the invention;

in FIG. 6 is a rail system with a sleepers railroad track arrows, based on a prefabricated elastic element according to the invention;

in FIG. 7 is a rail system with a sleeper resting on the prefabricated elastic element according to the invention with end sections;

in FIG. 8 is an example of an inner pallet for a prefabricated resilient member according to the invention;

in FIG. 9 is an example of an external pallet for use in combination with an internal pallet according to FIG. 8.

In FIG. 1 shows an example of a prefabricated resilient member 1 specially adapted to be integrated in a rail support block assembly.

In the embodiment shown here, the prefabricated resilient member 1 has an outer tray 2 and an inner tray 3 located inside said outer tray 2.

The pallets 2, 3 here generally have a bottom, in this case a rectangular bottom, and a raised peripheral wall and are open at the top.

One skilled in the art will appreciate that other common forms of pallets are possible, for example, depending on the shape of the block, such as with an oval external contour, an external contour in the form of a trapezoid, a hexagonal block, and the like.

The inner pallet 3 here has such dimensions that it can be kept placed with a gap between it and the outer pallet 2 in all directions. Practically preferred is the aforementioned distance between the main faces of the inner and outer pallets 2, 3, generally comprising at least 5 mm and preferably at most 20 mm, more preferably not more than 15 mm.

An elastic intermediate structure 5 is located between said outer and inner pallets 2, 3. The said structure 5 here also connects said pallets 2, 3 to form a single assembly with said pallets, preferably said structure 5 is connected with the faces of each of the pallets 2, 3.

- 2 014736

Here, in a preferred embodiment, the elastic structure 5 is obtained by placing pallets 2, 3 at a distance from each other, then pouring (or the like) of the corresponding elastomeric material between the outer and inner pallets 2, 3. When the material is poured (or similarly placed) between pallets 2, 3, the material binds essentially completely the main edges of the inner and outer pallets 2, 3, preferably so that there is no junction that allows the penetration of water and the like.

The elastic intermediate structure 5, therefore, serves to interconnect the pallets 2, 3 so as to form a single prefabricated elastic element 1, as well as to create a sound and / or vibration damping support for the block 10 when the assembly is embedded in a plate or installed on another lower track structure.

The outer and inner pallets 2, 3 are placed at a distance from each other so as not to have contact points, and the intermediate elastic layer 5 provides elastic movement of the inner pallet (receiving unit) in all directions.

Here, which is preferred, the inner and outer pallets 2, 3 are more rigid than the elastic intermediate structure 5.

In practice, pallets 2, 3 can be made of a material such as plastic, (fibrous) reinforced plastic, composite plastic material, metal or even wood. Plastic material is preferred, and pallets 2, 3 can, for example, be injection molded, or, which is preferred, made of plastic sheet material. The plastic material may be, for example, a polyurethane polymer or an ABS polymer.

The elastomeric material of structure 5 and pallets 2, 3 are preferably designed and selected so as to obtain strong bonding or bonding between the inner faces of the pallets and the elastomeric material. For example, the elastomeric material may be a polyurethane elastomer, such as Sotco1a1, manufactured by the applicant.

In general, in FIG. 1 shows a sandwich-type multi-layer prefabricated resilient member in which a layer of elastomeric material 5 is sandwiched between pallets 2, 3.

The elastic intermediate structure 5, here the layer of elastomeric material 5, is made with the possibility of maintaining elasticity during the service life. For example, the aforementioned structure 5 (and the elastic assembly into which it is embedded) must be able to serve on railway lines in accordance with the technical specifications of ITS 700, Classification of lines and limits of the resulting load for railcars, corresponding to the technical specifications of the International Union of Railways.

The inner faces of the pallets 2, 3 are preferably made with a surface that improves adhesion, for example, uneven, as in the drawings, and / or provided with adhesion-improving formations, such as ribs, protrusions, etc.

The inner edges of the pallets 2, 3 can be pretreated to improve adhesion, for example machining or chemical treatment.

Pallets 2, 3 can be made of the same or different materials. For example, the inner tray may be made of plastic and the outer tray is made of metal. The metal outer pallet gives high resistance to damage and / or penetration of the outer pallet, with the possible impact on the implementation of the functions of an elastic material. A metal external pallet, for example steel, can also be selected because it allows the pallet to be installed or embedded in a steel structure, for example, on a steel plate or steel element of a railway bridge or the like. The steel outer pallet may be provided, for example, with a flange that can be attached to said additional steel structure.

Also, the wall thickness of the pallets 2, 3 may be the same or different, for example, depending on the selected material and / or method of application.

Pallets 2, 3 or one of the pallets may be made of electrical insulating material. The intermediate elastic structure 5 may also have electrical insulating properties.

You can also provide for the placement of one or more preformed elastic elements, for example, elastic mats or plates (for example, from a suitable foam), between pallets 2, 3 and possible gluing to both pallets using the appropriate adhesive.

The use of one element (or several) of flexible foam elements, preformed, between the bottoms of pallets, for example, is provided to obtain a softer support for the rail (s).

When using one or more preformed elements between the pallets, the entire remaining space between the pallets 2, 3 is filled with fluid elastomeric material, as explained in relation to the structure 5 shown in FIG. one.

In FIG. 1 further shows an example of a support block 10 of a rail. This block 10 is here made of fluid material poured into the appropriate injection mold at the place of manufacture. Preferably, the block 10 is made of concrete. Provided that the mentioned

- 3 014736 concrete may be polymer concrete. Other embodiments of a block containing concrete are also provided, for example, including reinforcing materials. The block can also be made of other materials, such as steel, for example a cast block or a welded steel block.

Block 10 has a top 11, a bottom 12 and a peripheral wall 13. Here, block 10 is made as a monoblock for supporting one rail of a railway track, but the block can also be made as a double block carrying two or even more rails (like a railway sleeper). Here, the block 10 has a significant height.

For fastening the rail to the top 11 of the block 10, the block 10 is equipped with one or more elements 15 of the rail. Also here, on top of block 10, an elastic plate 16 is installed, which should lie under the rail.

In FIG. 2 shows a block 10 located in the inner pallet 3 of a prefabricated elastic element 1. It is shown here that the top of the block 10 is placed at a vertical distance from the upper edge of the pallets 2, 3.

In FIG. 2 also shows that here the block 10 is fixed in the inner pallet 3, preferably using the appropriate adhesive 17 between the inner pallet 3 and the block 10. This adhesive preferably hardens, becoming stiff during curing, thereby turning the inner pallet 3 into a single body with the block 10. Such adhesives are known in the art and, for example, are sold under the brand name ΌΕΧ.

It should be noted that the internal dimensions of the inner pallet 3 are preferably selected, taking into account any changes in the dimensions of the block 10, depending on the method of production of the block.

In FIG. 3 shows the assembly of FIG. 2 mounted on a rail 20 to be installed. In practice, said rail 20 is held in position by temporary supports.

In FIG. 4 concrete or asphalt slab 25 is poured under the rail 20 for embedding the elastic element 1 in the slab 25.

To improve the integration of the external pallet 2 into the plate 25, the external pallet 2 can be made uneven and / or with anchor structures (for example, rib (s), clamp (s), bolts or pins, etc. protruding from the pallet 2) .

In a practical embodiment, the outer pallet on the outer side and / or the inner pallet on the inner side can be made uneven by creating an uneven mineral coating, for example, crushed pebbles, rocks, gravel, etc. This crushed material can be fixed with adhesive , e.g. epoxy, to the corresponding edge of the pallet.

An external pallet 2 is also provided with the peripheral wall or parts thereof tilted inward so that the integrated external pallet cannot be pulled upward from the plate.

The pallet may be provided with one or more perforations.

In a not shown embodiment, the assembly is not built-in, but fixed on the lower track structure, for example, on a slab (metal or concrete) of the lower track structure or beam.

In FIG. 5, the block is made in the form of a sleeper 30, equipped with rail mounting parts for supporting two parallel rails 31, while the sleeper 30 is made, for example, of concrete or wood. The elastic element 40 according to the invention has a shape and size corresponding to the sleepers 30. The system includes a concrete base 50, an assembly of the elastic element 40 and sleepers 30 fastened thereto by pouring a curable material 55, for example concrete, around the element 40 (for example, since the base 50 includes holes for receiving assemblies).

In FIG. 6 sleeper 60 is a sleeper arrow railroad track with four fastening parts 6 for four rails. The element 40 is made corresponding to the size and shape of the sleepers 60.

In FIG. 7, the sleeper 30 is supported at each end by an elastic member 70 according to the invention. Each element 70 includes an inner and outer pallet with a bottom and a peripheral wall extending around the end of said sleepers.

In FIG. 8 shows the outer pallet 80 of a prefabricated resilient member according to the invention. This pallet 80 is injection molded from a suitable plastic material. From the outside, the pallet 80 includes anchor elements 81 embedded in the curable material poured around the pallet 80.

In FIG. 9 shows an inner pallet 90 mounted in a pallet 80 with the introduction of an elastic intermediate structure between them, as disclosed herein. As you can see, inside the inner pallet 90 is equipped with anchor elements 91, 92 that improve anchoring with cement mortar or adhesive connecting the inner pallet 90 with the block. As you can see, in this example, the anchor elements are cast together with the pallet. Also, the anchor elements 91, 92 in this example include a wall section spaced from the pallet inward and connected to the said pallet by ribs.

Claims (14)

1. A prefabricated elastic element (1) for assembling the rail support block, wherein the assembly is configured to install or install on the railway track (25) embedded in the lower structure and contains said elastic element (1), as well as a block (10) having a top, a bottom and a peripheral wall, said block being adapted for fastening one or more rails (20) on top of said block, and a prefabricated resilient element (1) is adapted to be attached to said block so as to pass under said bottom of the block, as well as around at least the lower region of the peripheral wall of the block, characterized in that said prefabricated elastic element (1) has an external pallet (2) and an internal pallet (3) located in the said outer pallet wherein said prefabricated resilient member (1) comprises an resilient intermediate structure (5) located between said outer and inner pallets (2, 3). 2. An elastic element according to claim 1, in which said inner and outer pallets (2, 3) are more rigid than an elastic intermediate structure (5). 3. The elastic element according to claim 1 or 2, wherein said inner and outer pallet (2, 3) each has a bottom and a raised peripheral wall. 4. The elastic element according to one or more of the preceding paragraphs, in which the outer and inner pallets (2, 3) are placed at a distance from each other so that they do not have contact points. 5. The elastic element according to one or more of the preceding claims, wherein said elastic intermediate structure (5) comprises and preferably consists essentially of an elastomeric material, for example a polyurethane elastomeric material. 6. The elastic element according to one or more of the preceding claims, wherein said outer pallet (2) has an outer surface equipped with anchor structures to improve the adhesion of the outer pallet to the concrete slab. 7. The elastic element according to one or more of the preceding paragraphs, in which said outer and inner pallets (2, 3) are made of plastic material. 8. The elastic element according to one or more of the preceding claims, wherein said outer and inner pallets (2, 3) are made of sheet material, preferably plastic sheet material. 9. The elastic assembly (1, 10) of the rail support block, wherein the assembly is configured to install or install a rail track embedded in the lower structure (25) of the rail, comprises an elastic element (1) according to one or more of the preceding points, as well as a block (10) having a top, bottom and a peripheral wall, said block being adapted for fastening one or more rails (20) on top of said block, and a prefabricated elastic element (1) is fixed in said block so as to pass under said bottom of the block eye, as well as around at least the lower region of the peripheral wall of the block. 10. The elastic assembly (1, 10) of the rail support block, in which said prefabricated resilient element (1) is bonded to said block by adhesive (17) or cement mortar. 11. A method of manufacturing a prefabricated elastic element according to one or more of the preceding paragraphs, including the manufacture of internal and external pallets (2, 3) and placing said intermediate elastic structure (5) between said internal and external pallets (2, 3). 12. A method of manufacturing an elastic assembly (1, 10) of a rail support block according to claim 9, comprising manufacturing an elastic element (1) according to one or more of the preceding paragraphs, manufacturing a block (10), fastening said elastic element with a block. 13. The method according to item 12, in which the elastic element (1) is made on the first site and the block (10) is made on the second, remote site, and the elastic element (1) is transported on the second platform and attached to the block on the second site . 14. A railway system comprising one or more rails attached to an assembly of a rail support block according to one or more of the preceding paragraphs.