A railroad bed has an elastomeric mat which supports the ballast and on which the sleepers and rails are mounted. The mat has an upper surface formed by a metal or plastic sheet which prevents penetration of the ballast into the elastomeric body.
Elastic band-shaped base (1) made of rubber or of a material similar to rubber for insulating and absorbing vibrations and impact sound, specially track-bed matting, wherein the base is fitted with spaced tubes (2, 3) running parallel to the ground side (4) of the base on at least two planes (I, II). The tubes have a semicircular, semi-oval, or semi-ellipsoidal cross section. The invention is characterized in that two planes (I, II) are arranged at a distance (A) in relation to each other, irrespective of the total number of the planes of tubes, forming a continuous intermediate covering (5) running parallel to the ground side (4) of the base (1), in such a way that the smoothed down sides of the tubes (2, 3) all face the intermediate covering (5). The inventive design provides for advantageous construction parameters of the elastic base.
A mat comprising an elastic material which serves as an underlay for a ballast bed of crushed stone, metallic particles, or the like is provided with a plurality of projections on its underside and with an upper layer of a material different from the elastic material. This upper layer on the upper side of the mat advantageously comprises a strong fabric. Particularly the upper layer may comprise a multilayered fabric with inlay layers of elastic material positioned between the individual layers of the multilayer fabric as well as a coverying layer of a softer material on the upper surface of the upper layer of the mat. The fabric of the upper layer of the mat advantageously comprises a water and rot resistant plastic material, such as a polyamide.
A superstructure arrangement for a track comprising a rail fastened to a securing device such as a ribbed plate which is disposed above a concrete sleeper, with an intermediate layer extending between the sleeper and the securing device. The rigidity of the intermediate layer is variable and rated so that at the maximum permissible stress in the rail, caused by bending under wheel lead, the elastic property changes to substantially non-elastic.
An elastomeric insert for filling the cavity of a bottom foundation fitting or socket in a steel deck of a conveyance, such as a steel container ship, whereby a lashing knuckle of a binder tie down rod for lashing a container to the deck is readily secured within the socket, while the insert remains disposed within the socket, so as to prevent the intrusion of debris and dirt, as well as water, from entering the socket cavity, thereby maintaining access and utility of the deck sockets.
The invention relates to a vibration damping system, which comprises an anti-vibration plate in the form of a plate having a first and a second major surface, wherein the first major surface may preferably be covered with a layer of surfactant-free geotextile. The anti-vibration plate comprises one or more layers, preferably a top layer and one or more bottom layers. Furthermore, it is essential that the anti-vibration plate is preferably obtainable by a method comprising the step of subjecting an area of the opposite surfaces of the plate to a compression treatment in one or more steps, which compression treatment is sufficient to reduce the static and/or the dynamic stiffness of the plate compared to the static and/or dynamic stiffness prior to the compression. The invention also relates to the method of applying a vibration damping system and the use of a vibration damping system.
