JP5220752B2 - Elastic support block assembly for rail - 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 the technical field of supporting track rails such as trains, subways, and trams.

  In the field of track technology, various systems for suppressing noise and vibration have been developed.

  In the known configuration, the rails are supported by rail support blocks arranged at intervals under the rails. These blocks are embedded in the concrete slab. Injecting the slab around the block is a normal method, but the block is also arranged in each cavity provided in the slab. An elastic member is disposed between the block and the slab in order to suppress noise and vibration generated when the railway vehicle passes on the track.

  In the known system developed by the applicant of the present application, an elastic support block assembly for a rail is prepared which can be mounted on a supporting rail. The assembly includes a concrete block configured to secure a rail on top of the block. The assembly also includes a concrete tray extending below the block bottom and spaced from the block bottom and spaced from the lower region about the lower region of the peripheral wall of the block. During assembly manufacture, an elastic material, such as that sold under the trade name “Corkelast”, is injected between the concrete tray and the block. Upon polymerization (while maintaining its elastic properties), the elastic material adheres to the concrete block and concrete tray, thereby securing the tray to the block. As the rails are laid, known rail support block assemblies are spaced along the rails and secured. Thereafter, by injecting the concrete slab, the concrete tray is embedded in the slab and integrated with the slab. This method is known in the art as the “fix and forge method”.

  In order to lay a long line, a large number of such line support block assemblies are required. Regarding the manufacture of the track support block assembly, because of its weight, it is preferable to manufacture the track support block assembly in a concrete building material factory located relatively close to the track laying site. In practice, this approach faces manufacturing difficulties for the line support block assembly. That is, it has been found difficult to ensure the quality of the assembly, particularly the adhesion of each component of the known assembly. Specifically, it has been found that it is difficult to control the adhesion between the concrete block, the concrete tray, and the injectable elastic material, and that the concrete surface or the like requires a considerably large pretreatment.

  Applicants consider this adhesion important because the elastic material used in the assembly is repeatedly compressed and relaxed during its use. When the adhesion is reduced or completely lost, the block is “released” from the slab. This is considered undesirable because the rail itself is not fully connected to the slab. Also, liquids such as water and fuel can enter between components that are no longer (sufficiently) fixed, resulting in a “pumping action” each time the railcar passes. This causes troubles such as noise and vibration, and also causes wear and damage, resulting in maintenance work.

  In the system disclosed in Patent Document 1, the rail support block is arranged in a (prefab) tray pre-formed from plastic or concrete. This tray is configured to be embedded in a concrete slab. Elastic elements are arranged in the tray, in particular between the tray and the bottom of the block and between each side of the tray and the block face facing it. The tray and the block are fixed with the elastic element sandwiched between them based on the tightening force generated by the elastic element being preloaded by the block when the block is placed on the tray.

  In this system known from US Pat. No. 6,057,049, the block can be removed from the tray embedded in the slab so that the block can be replaced, for example, when damaged. To remove it, simply lift the block from the tray. Many alternatives have been proposed for the purpose of preventing water and the like from entering between the tray and the block, including a space between the block and the tray having an elastic element that supports the block. A method of injecting a silicone filler is also included.

EP 919,666

  It is an object of the present invention to propose one or more measures that can realize an improved elastic support block assembly for a line and / or an improved manufacturing method thereof.

  Another object of the present invention is to provide a manufacturing method that can be carried out economically while keeping the quality of the manufactured assembly high.

  The present invention provides a pre-formed elastic member for a rail support block assembly. The assembly is configured to be embedded or attached to the track structure, and in addition to the elastic member, the top, bottom and peripheral walls configured to secure one or more rails on the block. The block which has these. The prefabricated elastic member is fixed to the block so as to extend below the bottom of the block and around at least the lower region of the block peripheral wall.

  According to the present invention, the prefabricated elastic member comprises an outer tray and an inner tray disposed in the outer tray, and the prefabricated elastic member further comprises an elastic intermediate structure disposed between the outer tray and the inner tray. .

  The present invention further provides a method of manufacturing a rail support block assembly. According to the method of the present invention, after the prefabricated elastic member according to the present invention is formed in advance and the block is manufactured, the block is fixed to the inner tray of the elastic member.

  In a preferred embodiment of said manufacturing method, the elastic member is manufactured at a first location, preferably a company specializing in intermediate elastic structures for railways, and the block is at a second remote location, preferably of concrete building materials. Manufactured in a company that specializes in manufacturing. The block is then placed on the inner tray of the elastic member, preferably at the second location, and the block is adhered to the inner tray. The completed track support block assembly is transported to the track laying site.

  Preferably, the block and the inner tray are bonded by applying an adhesive, for example, by injecting an adhesive such as a suitable epoxy adhesive or mortar between the block and the inner tray.

  According to the elastic member of the present invention, there is an advantage that the elastic member can be manufactured under the control environment of a specialized company. This ensures a complete quality with respect to the elastic member. The process of creating adhesion between the inner tray and the block is simpler and more detailed compared to the adhesion between the injectable elastic material and the concrete element as described for Applicant's prior art assembly. It seems that it is a work that does not require. Therefore, this bonding work can be performed at the concrete block manufacturing place or other places (for example, a track laying place).

  The present invention will be described in more detail with reference to the accompanying drawings.

It is a figure which shows an example of the track | line support block by this invention, and an example of a prefabricated elastic member. FIG. 2 shows an assembly according to the present invention comprising the block of FIG. 1 and an elastic member, the elastic member being fixed to the block. FIG. 3 shows a rail with the assembly of FIG. 2 prior to being embedded in a concrete slab. FIG. 4 shows the rail of FIG. 3 with the assembly embedded in a concrete slab. It is a figure which shows the rail system provided with the sleeper supported by the prefabricated elastic member of this invention. It is a figure which shows the rail system provided with the sleeper for track switching supported by the prefabricated elastic member of this invention. It is a figure which shows an example of the outer side tray for the prefabricated elastic members of this invention. It is a figure which shows an example of the inner side tray used in combination with the outer side tray of FIG.

  An example of a prefabricated elastic member 1 is shown in FIG. 1, but this prefabricated elastic member is specifically configured to be incorporated into a rail support block assembly.

  In the embodiment shown here, the prefabricated elastic member 1 has an outer tray 2 and an inner tray 3 arranged inside the outer tray 2.

  The trays 2 and 3 each have a rectangular bottom portion and a peripheral wall portion rising from the rectangular bottom portion, and open at the top.

  As will be appreciated by those skilled in the art, the overall shape of the tray can be other shapes depending on the shape of the block, for example when the shape of the block is oval, trapezoidal, hexagonal, etc. It is.

  The dimensions of the inner tray 3 are such that they are held spaced from the outer tray 2 in all directions. In practice, the distance between the main surfaces of the inner tray 3 and the outer tray 2 is preferably 5 mm or more and 20 mm or less, more preferably 15 mm or less.

  An elastic intermediate structure 5 is arranged between the inner tray 3 and the outer tray 2. The structure 5 is also connected to these trays so as to form an integral assembly with the trays 2 and 3, but the structure 5 is preferably bonded to the respective surfaces of the trays 2 and 3.

  In the preferred embodiment shown here, the outer tray 2 and the inner tray 3 are spaced apart from each other, and then a suitable elastomeric material is injected between the trays 2 and 3 (or similar) for elasticity. The structure 5 is configured. Since the material is injected (or similar) between the trays 2 and 3, the material adheres to substantially the entire main surfaces of the outer tray 2 and the inner tray 3. It is preferable that there is no such interface.

  As a result, the elastic intermediate structure 5 connects the trays 2 and 3 to form the integral prefabricated elastic member 1, and when the assembly is embedded in the slab or attached to another structure, the block 10 It works to attenuate noise and vibration.

  The outer tray 2 and the inner tray 3 are mutually connected so that there is no point of contact with each other and the intermediate elastic layer 5 allows elastic movement in all directions of the inner tray (receiving the block). Arranged at intervals.

  Here, the outer tray 2 and the inner tray 3 are preferably more rigid than the elastic intermediate structure 5.

  Actually, the trays 2 and 3 can be made of plastic, (fiber) reinforced plastic, composite plastic material, metal, wood, or the like. Among these, a plastic material is suitable, and the trays 2 and 3 can be formed by, for example, injection molding or a plastic sheet material. As the plastic material, urethane polymer or ABS polymer can be used.

  The elastomeric material and the trays 2 and 3 used for the structure 5 are preferably made or selected so that strong adhesion or adhesion can be obtained between the inner surface of the tray and the elastomeric material. For example, a polyurethane elastomer material such as “Corkelast” manufactured by the present applicant can be used as the elastomer material.

  FIG. 1 schematically shows a sandwich-type prefabricated elastic member in which a layer of elastomeric material 5 is sandwiched between trays 2 and 3.

  The elastic intermediate structure 5, in this example the elastomer material layer 5, is configured to maintain elasticity throughout its lifetime. For example, the structure 5 (and the elastic assembly in which the structure is incorporated) is capable of functioning on a railway track defined in the UIC standard 700, “Classification of routes and load restrictions on vehicles”, which is a related standard of the International Railway Union. There must be.

  The inner surfaces of the trays 2 and 3 are preferably provided with a roughened surface as shown in the drawing and / or provided with an adhesion enhancing formation such as a rib or a protrusion.

  Pretreatment for enhancing adhesion such as mechanical treatment or chemical treatment may be performed on the inner surfaces of the trays 2 and 3.

  The materials of the trays 2 and 3 may be the same or different. For example, the inner tray may be made of plastic and the outer tray may be made of metal. Making the outer tray metal can increase resistance to damage and / or permeation of the outer tray, which can affect the function of the elastic material. When a metal outer tray such as steel is selected, the tray can be mounted or incorporated in a steel structure such as a steel plate or steel member such as a railway bridge. For example, a flange may be provided on the steel outer tray so that it can be fixed to the steel structure as described above.

  The wall thicknesses of the trays 2 and 3 may be the same or different depending on the selected material and / or application.

  Both or one of the trays 2 and 3 may be formed of an electrically insulating material. The intermediate elastic structure 5 may also be electrically insulated.

  Also, one or more pre-formed elastic elements such as elastic mats or plates (such as suitable foam materials) are placed between the trays 2 and 3 and, if possible, on both trays using a suitable adhesive. Adhesion is also conceivable.

  It is believed that using one or more preformed flexible foam elements between the bottoms of both trays can provide more flexible support for the rails.

  If one or more preformed elastic elements are used between the trays, and there is a space between the trays 2 and 3, an injectable elastomer as described with respect to the structure 5 of FIG. Fill the space with material.

  FIG. 1 also shows an example of a line support block 10. The block 10 in this example is formed by injecting an injectable material into an appropriate mold at a manufacturing site. The block 10 is preferably made of concrete. The concrete in this case can be polymer concrete. As an embodiment of a block including other concrete, one including a reinforcing material is conceivable. The block can be formed using other materials such as steel, for example as a cast block or a welded steel block.

  The block 10 has an upper part 11, a bottom part 12 and a peripheral wall 13. The block 10 shown here is formed as a single block for supporting one track rail, but may be formed as a double block for supporting two or more rails (like sleepers). . The block 10 in this example has a considerable height.

  In order to fix the rail to the upper part 11 of the block 10, one or more rail fixing members 15 are provided on the block 10. In this example, the elastic plate 16 is also provided in the block 10, and this elastic plate 16 is located under the rail.

  FIG. 2 shows a state in which the block 10 is installed in the inner tray 3 of the prefabricated elastic member 1. Here, the upper part of the block 10 is disposed at a distance from the upper edge of the trays 2 and 3 in the vertical direction.

  FIG. 2 also shows a state in which the block 10 is fixed in the inner tray 3, and this fixing is preferably performed by applying an appropriate adhesive 17 between the inner tray 3 and the block 10. It is preferable to use an adhesive that cures and becomes rigid in the cured state so that the inner tray 3 and the block 10 are integrated. Such adhesives are well known in the art and are commercially available, for example under the trade name DEX.

  The inner method of the inner tray 3 is preferably determined in consideration of variations in the dimensions of the block 10 due to the block manufacturing method or the like.

  FIG. 3 shows a state where the assembly of FIG. 2 is mounted on the rail 20 before laying. In practice, the rail 20 is held in a desired position by a temporary support.

  In FIG. 4, a concrete or asphalt slab 25 is injected under the rail 20, and the elastic member 1 is embedded in the slab 25.

  In order to strengthen the embedding of the outer tray 2 in the slab 25, the outer side of the outer tray 2 is roughened and / or formed to be fixed (for example, ribs, protrusions, bolts, pins, etc. from the tray 2). Protruding in the direction).

  In actual embodiments, the outer tray and / or the inner tray may be roughened by providing a coarse mineral coating crushed of pebbles, rocks, gravel, or the like. Such a crushing material can be fixed to each surface of the tray using an adhesive such as epoxy.

  Alternatively, the peripheral wall of the outer tray 2 or a part thereof may be inclined inward so that the embedded outer tray cannot be pulled upward from the slab.

  One or more through holes may be provided in the tray.

  In FIG. 5, the block is implemented as a sleeper 30 with a rail fixture that supports two parallel rails 31, and the sleeper 30 is made of, for example, concrete or wood. The elastic member 40 according to the present invention has a shape and dimensions adapted to the sleepers 30. The system includes a concrete base 50 by which an assembly of elastic members 40 and sleepers 30 is injected by injecting a curable material 55 such as concrete around the elastic member 40 (e.g., the base 50 has holes for receiving these assemblies). It is fixed to the concrete base 50.

  A sleeper 60 shown in FIG. 6 is a sleeper for line switching provided with four rail fixing members 6 so as to fix four rails. The member 40 has a configuration adapted to the shape and dimensions of the sleepers 60.

FIG. 7 shows a prefabricated elastic outer tray 80 according to the present invention. The tray 80 is formed by injection molding a suitable plastic material. A fixing member 81 is provided on the outside of the tray 80, and the fixing member 81 is embedded in a curable material to be injected around the tray 80.

FIG. 8 shows an inner tray 90 that is placed in the tray 80 via the elastic intermediate structure described above. As can be seen, fixing members 91 and 92 are provided on the inner side of the inner tray 90, and these fixing members strengthen the fixing of the inner tray 90 to a mortar or other adhesive that connects the block. In this example, the fixing member is formed simultaneously with the tray. In addition, the fixing members 91 and 92 in this example include wall portions that are spaced inward from the tray, and are connected to the tray via ribs.

Claims (12)

A rail support block assembly, the rail support block assembly is configured to be mounted embedded in a slab of concrete or asphalt, the rail support block assembly, in addition to the prefabricated resilient member (1), comprising a block (10) having a top and bottom and a peripheral wall, said block is composed of one or more rails (20) so as to fix onto the block, said prefabricated resilient member (1) In a rail support block assembly secured to the block so as to extend around at least a lower region of the peripheral wall of the block in addition to under the bottom of the block,
The prefabricated elastic member (1) has an outer tray (2) and an inner tray (3) disposed inside the outer tray , and the outer tray (2) and the inner tray (3) are in contact with each other. The outer tray (2) and the inner tray (3) each have a bottom and a rising peripheral wall, and the bottom and the rising peripheral wall have a main surface, The prefabricated elastic member (1) includes an intermediate elastic layer (5) sandwiched between the outer tray (2) and the inner tray (3), and the intermediate elastic layer (5) includes the outer tray (5). 2) and the inner tray (3) are interconnected so that the outer tray and the inner tray form an integral assembly and the outer surface of the outer tray (2) and the inner surface of the inner tray (3). Fixed to the block (10) The rail support block assembly, characterized in that it is fixed to the rising peripheral wall of the inner tray with the inner tray (3) in (3). The rail support block assembly according to claim 1, wherein the outer tray (2) and the inner tray (3) are stiffer than the intermediate elastic layer (5). The rail support block assembly according to claim 1 or 2 , wherein the intermediate elastic layer (5) comprises an elastomeric material. The rail support block assembly according to claim 3, wherein the intermediate elastic layer (5) consists essentially of an elastomeric material. The rail support block assembly according to claim 3 or 4, wherein the intermediate elastic layer (5) is a polyurethane elastomer material. The outer tray (2) has an outer surface, the outer surface being provided with a rough outer surface to enhance the engagement of the outer tray with a concrete or asphalt slab. A rail support block assembly according to claim 1 . The rail support block assembly according to any of the preceding claims, wherein the outer tray (2) and the inner tray (3) are formed from a plastic material. Rail support block assembly according to any of the preceding claims, wherein the outer tray (2) and the inner tray (3) are formed from sheet material. The rail support block assembly according to any of the preceding claims , wherein the prefabricated elastic member (1) is fixed to the block (10) using an adhesive (17) or mortar. A method for manufacturing a rail support block assembly according to any of claims 1 to 9 , wherein the outer tray (2) and the inner tray (3) are manufactured, and the outer tray (2) and the inner tray (3). The intermediate elastic layer (5) is disposed between them , the block (10) is manufactured, and the prefabricated elastic member is fixed to the block . The prefabricated manufactured in an elastic member (1) a first location, said blocks (10) prepared in the second remote location, by conveying the prefabricated resilient member (1) to said second location, The manufacturing method according to claim 10 , wherein the block is fixed to the block at the second location. Track system including one or more rails which are fixed to a rail support block assembly according to any of claims 1-9.

Images