Tie foundation for a railway tie

Abstract

A tie foundation ( 1 ) for a railway tie ( 2 ) having at least a first elastic, preferably elastomer layer ( 3 ) and at least a second elastic, preferably elastomer layer ( 4 ), with a reinforcement layer ( 5 ) being embedded between the first elastic layer ( 3 ) and the second elastic layer ( 4 ), with the second elastic layer ( 4 ) forming an outer surface ( 6 ) of the tie foundation ( 1 ) and the reinforcement layer ( 5 ) comprising a fibrous material.

1 . A tie foundation ( 1 ) for a railway tie ( 2 ) comprising at least a first elastic layer ( 3 ) and at least a second elastic layer ( 4 ), with a reinforcement layer ( 5 ) being embedded between the first elastic layer ( 3 ) and the second elastic layer ( 4 ), and the second elastic layer ( 4 ) forms an exterior surface ( 6 ) of the tie foundation ( 1 ) and the reinforcement layer ( 5 ) comprises a fibrous material. 
     
     
         2 . A tie foundation ( 1 ) according to  claim 1 , wherein the exterior surface of the tie foundation ( 1 ) opposite the second layer ( 4 ) comprises a connection layer ( 7 ) having at least one solid material, which between the solid material has clear spaces ( 8 ) open towards an outside to accept extraneous material. 
     
     
         3 . A tie foundation ( 1 ) according to  claim 2 , wherein the solid material of the connection layer ( 7 ) comprises a spatially spread grid made from threads ( 9 ), with a thickness ( 10 ) of the grid or a depth of the clear spaces ( 8 ) open towards the outside at least amounts to 3-times a thickness of one of the threads ( 9 ). 
     
     
         4 . A tie foundation ( 1 ) according to  claim 3 , wherein the solid material of the connection layer ( 7 ) comprises a spatially spread grid made from the threads ( 9 ), with the thickness ( 10 ) of the grid or the depth of the clear spaces ( 8 ) open towards the outside amounts to at least 10-times the thickness of one of the threads ( 9 ). 
     
     
         5 . A tie foundation ( 1 ) according to  claim 3 , wherein the threads ( 9 ) of the grid are arranged irregularly. 
     
     
         6 . A tie foundation ( 1 ) according to  claim 3 , wherein the threads ( 9 ) of the grid are partially connected to each other. 
     
     
         7 . A tie foundation ( 1 ) according to  claim 3 , wherein the threads ( 9 ) of the grid project as loops from the first elastic layer ( 3 ). 
     
     
         8 . A tie foundation ( 1 ) according to  claim 2 , wherein at least one of the connection layer ( 7 ) or the grid are embedded in the first elastic layer ( 3 ). 
     
     
         9 . A tie foundation ( 1 ) according to  claim 2 , wherein at least one of the connection layer ( 7 ) or the grid are embedded in the first elastic layer ( 3 ) by at least 20% or at least 40% of a thickness ( 10 ) thereof. 
     
     
         10 . A tie foundation ( 1 ) according to  claim 3 , wherein the threads ( 9 ) are comprised of plastic. 
     
     
         11 . A tie foundation ( 1 ) according to  claim 10 , wherein the plastic is polypropylene or polyamide or polyethylene. 
     
     
         10 . A tie foundation ( 1 ) according to  claim 1 , wherein at least the first elastic layer ( 3 ) or at least the second elastic layer ( 4 ) comprise a foamed elastomer or are made therefrom. 
     
     
         13 . A tie foundation ( 1 ) according to claim  12 , wherein the elastomer is a closed-pored. 
     
     
         14 . A tie foundation ( 1 ) according to  claim 1 , wherein at least the first elastic layer ( 3 ) or at least the second elastic layer ( 4 ) comprises polyurethane or a caoutchouc elastomer. 
     
     
         15 . A tie foundation ( 1 ) according to  claim 1 , wherein the first elastic layer ( 3 ) and the second elastic layer ( 4 ) comprise the same material. 
     
     
         16 . A tie foundation ( 1 ) according to  claim 1 , wherein the fibrous material of the reinforcement layer ( 5 ) comprises fibrous threads ( 11 ), which connect the first elastic layer ( 3 ) and the second elastic layer ( 4 ) by way of embedding, and are connected to each other by at least one additional measure. 
     
     
         17 . A tie foundation ( 1 ) according to  claim 16 , wherein the additional measure comprises a knotted, adhered or welded connection. 
     
     
         18 . A tie foundation ( 1 ) according to  claim 1 , wherein the fibrous material of the reinforcement layer ( 5 ) comprising at least one of a web, a knitted fabric or a net. 
     
     
         19 . A tie foundation ( 1 ) according to  claim 18 , wherein the knitted fabric is a non-woven web. 
     
     
         20 . A tie foundation ( 1 ) according to  claim 1 , wherein the fibrous material of the reinforcement layer ( 5 ) comprise fiberglass, carbon fibers or a plastic, or a combination thereof. 
     
     
         21 . A tie foundation ( 1 ) according to  claim 1 , wherein the reinforcement layer ( 5 ) comprising apertures ( 13 ) which have open widths of no more than 2 mm or of no more than 1 mm. 
     
     
         22 . An arrangement comprising a railway tie ( 2 ) and a tie foundation ( 1 ) according to  claim 1 , wherein the tie foundation ( 1 ) is arranged at least at a bottom of the railway tie ( 2 ) that is adapted to face a ground area ( 14 ) in an operational position. 
     
     
         23 . An arrangement according to  claim 22 , wherein an exterior surface of the tie foundation ( 1 ) opposite the second layer ( 4 ) comprising the connection layer ( 7 ) has at least one solid material, which has clear spaces ( 8 ) between the solid material open towards the outside, with material of the railway tie ( 2 ) having penetrated into the clear spaces ( 8 ) of the connection layer ( 7 ) to connect the railway tie ( 2 ) to the tie foundation ( 1 ). 
     
     
         24 . A method for producing a tie foundation ( 1 ) comprising at least a first elastic layer ( 3 ) and at least a second elastic layer ( 4 ), with a reinforcement layer ( 5 ) being embedded between the first elastic layer ( 3 ) and the second elastic layer ( 4 ), and the second elastic layer ( 4 ) forms an exterior surface ( 6 ) of the tie foundation ( 1 ) and the reinforcement layer ( 5 ) comprises a fibrous material, the method comprising:
 placing the reinforcement layer ( 5 ) a base ( 15 ) and subsequently applying a reaction mixture ( 16 ) of a material of the first elastic layer ( 3 ) and the second elastic layer ( 4 ) onto the reinforcement layer ( 5 ), and subsequently arranging the reinforcement layer ( 5 ) between the first elastic layer ( 3 ) and the second elastic layer ( 4 ) during the reaction of the reaction mixture ( 16 ) by way of floating it in the reaction mixture ( 16 ).   
     
     
         25 . A method according to  claim 24 , wherein the reaction mixture ( 16 ) of the material of the first elastic layer ( 3 ) and the second elastic layer ( 4 ) is applied on the reinforcement layer ( 5 ) beginning at a side facing away from the base ( 15 ). 
     
     
         26 . A method according to  claim 24 , wherein the reaction mixture ( 16 ) of the material of the first elastic layer ( 3 ) and the second elastic layer ( 4 ) is applied over an entire surface of the reinforcement layer ( 5 .) 
     
     
         27 . A method according to  claim 24 , further comprising during the reaction of the reaction mixture ( 16 ), impressing the connection layer ( 7 ) into the reaction mixture ( 16 ). 
     
     
         28 . A method according to  claim 27 , further comprising during the reaction of the reaction mixture ( 16 ), pressing the connection layer ( 7 ) into the reaction mixture ( 16 ) in a foaming phase ( 18 ) or a rising phase of the reaction mixture ( 16 ). 
     
     
         29 . A method according to  claim 27 , wherein during the reaction of the reaction mixture ( 16 ) the connection layer ( 7 ) is pressed into the reaction mixture ( 16 ) from a side facing away from the base ( 15 ). 
     
     
         30 . A method according to  claim 27 , wherein during the reaction of the reaction mixture ( 16 ) the connection layer ( 7 ) is pressed into the reaction mixture ( 16 ) by at least 20% or by at least 40% of a thickness ( 10 ) of the connection layer ( 7 ). 
     
     
         31 . A method according to  claim 27 , wherein due to the impression of the connection layer ( 7 ) into the reaction mixture ( 16 ) the reaction layer ( 5 ) is pressed in a direction towards the base ( 15 ) or the floating of the reinforcement layer ( 7 ) is limited. 
     
     
         32 . A method for the production of a tie foundation ( 1 ) according to  claim 1 , further comprising initially producing the first elastic layer ( 3 ) as a preliminary product, and subsequently applying the reinforcement layer ( 5 ) upon the first elastic layer ( 3 ), and subsequently or simultaneously applying the second elastic layer ( 4 ). 
     
     
         33 . A method according to  claim 32 , wherein the first elastic layer ( 3 ) is produced as a preliminary product using a connection layer ( 7 ) arranged thereon. 
     
     
         34 . A method according to  claim 32 , wherein the second elastic layer ( 4 ) is applied as a reaction mixture.