Classifications

• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
  • E01B3/00—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails
  • E01B3/28—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone
  • E01B3/32—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone with armouring or reinforcement
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
  • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
  • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
  • E04C5/012—Discrete reinforcing elements, e.g. fibres

Definitions

• the present invention relates to concrete elements intended to serve as a support for rail tracks.
• the railway rail sleepers are the most representative.
• the ratio of the loads exerted by the rails on concrete and wooden sleepers is of the order of 1.17 to 1.28.
• the stresses measured in the ballast of a track with concrete sleepers are approximately 30 to 50% higher than the stresses measured in the ballast of a track with wooden sleepers.
• a major drawback of concrete sleepers is that their greater flexural rigidity significantly deteriorates passenger comfort and has a negative influence on track maintenance.
• rubber or other elastic materials are sometimes placed under the rails, but such a solution is not very economical.
• the object of the invention is to produce a support element for reinforced concrete rails which has elastic properties such that it has a deformability in traction and in bending comparable to that of wooden sleepers and whose internal structure does not not promote deterioration due to the propagation of vibrations.
• the composite material according to the invention that is to say a concrete reinforced with fibers dispersed in the mass, can itself serve as a second-order matrix in which another reinforcement is incorporated.
• the advantage of the support element according to the invention is that it has a flexural rigidity of the same order of magnitude as that of traditional wooden sleepers and in addition a high resistance to dynamic stresses generated by the passage of convoys on the rails.
• the support element according to the invention can advantageously be produced with a dimension in the axial direction of the railroad, much larger than that of traditional sleepers.
• the support element according to the invention also has the advantage of being able to be manufactured using simple and safe technology.
• the value of the constant C is 4 (the diameter of the fibers being expressed in centimeters).
• the fibers can be simply added to the constituents of the matrix concrete during the mixing operation thereof, which is a relatively simple and inexpensive operation.
• Such a manufacturing process is much simpler and more economical than conventional manufacturing processes.
• the composite material made up, according to the invention, of a matrix and a discontinuous reinforcement formed of fibers dispersed in the mass can itself serve as a second order matrix for the incorporation of a traditional reinforcement (classic or prestressing).
• a traditional reinforcement classic or prestressing
• the discontinuous reinforcement dispersed in the mass before being placed in the mold constitutes at least an appreciable part (at least 30%) of the entire reinforcement of the element d 'support.
• the concrete element according to the invention has the advantage of allowing a simplified, safe and economical manufacturing technology.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Fluid-Damping Devices (AREA)
• Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
• Reinforced Plastic Materials (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=3843677

Family Applications (1)

Country Status (4)

Cited By (2)

Families Citing this family (1)

Citations (6)

• 1984
  • 1984-08-07 EP EP84870111A patent/EP0141795A1/de not_active Withdrawn
  • 1984-08-20 PT PT7910984A patent/PT79109B/pt unknown
  • 1984-08-30 ES ES535524A patent/ES8506129A1/es not_active Expired
  • 1984-08-31 JP JP18360484A patent/JPS6085101A/ja active Pending

Patent Citations (6)

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