초록 ▼

Ballastless railroad lines are laid on prefabricated reinforced concrete slabs, which can eliminate the need for periodic maintenance of the ballast of traditional railroad lines, such maintenance being expensive and often difficult to carry out. Prefabricated, possibly prestressed, slabs are thereb

Ballastless railroad lines are laid on prefabricated reinforced concrete slabs, which can eliminate the need for periodic maintenance of the ballast of traditional railroad lines, such maintenance being expensive and often difficult to carry out. Prefabricated, possibly prestressed, slabs are thereby positoned upon a steel reinforced concrete block having the functions of a foundation and connector for the prefabricated slabs with the interposition of a concrete-asphalt mortar layer between the slabs and block. The slabs are secured to the foundation block either by means of two half-cylinders, forming parts of the slab structure, or by shoulders formed by upturned sides of the foundation block (tub).

대표청구항 ▼

A ballastless railroad line bed, comprising: an elongated steel-reinforced concrete support block, said support block being formed with spaced apart upwardly open cylindrical seats; a plurality of rectangular prefabricated reinforced concrete slabs along said block and supported thereby, said slabs

A ballastless railroad line bed, comprising: an elongated steel-reinforced concrete support block, said support block being formed with spaced apart upwardly open cylindrical seats; a plurality of rectangular prefabricated reinforced concrete slabs along said block and supported thereby, said slabs having confronting edges along which they are provided unitarily with downwardly projecting semicylindrical protuberances of concrete, each of said seats receiving a respective semicylindrical protuberance of each of two successive slabs along said bed, whereby two protuberances extend into each seat with spacing from one another, the two protuberances in each seat having flat surfaces juxtaposed with one another and cylindrically convex surfaces turned away from one another, said two protuberances being received with all around clearance in the respective seat, said slabs and said support block defining spaces between them at least along the entire underside of said slabs; and respective layers of a yieldable concrete asphalt mortar injected into and substantially filling said spaces.