High-speed railway aerodynamic sleeper

High-speed railway aerodynamic sleeper (1) comprising:

• one central area (2),
• two support areas (3), on each side of the central area (2), on which rails (13) are placed,
• two outer areas (4), located at the ends of the sleeper (1), and following the support areas (3),
• wherein the cross-section of the sleeper (1) comprises, on the central area (2), and on the support areas (3), and on the two outer areas (4), two solid sections:
• a first bottom section (5), comprising a first polygon (7) of at least 4 sides,
• a second top section (6), comprising at least one second polygon (8) of “n” sides, with n ≧4;
• such that:
• the first bottom section (5) and the second top section (6) are attached, and the top base (9) of the first polygon (7) and the bottom base (10) of the second polygon (8) share their sides;
• such that the central area (2) of the sleeper (1) comprises:
• one middle sector (2a) that constitutes the centre of the sleeper (1), and
• two end sectors (2b) located at both sides of the middle sector (2a) of the central area (2) of the sleeper (1),
• characterized in that the cross-section comprises in the second top section (6) of the middle sector (2a) of the central area (2) only one second polygon (8) in which the number of sides “n” tends to infinity having a conic section profile, such that by means of the geometry of the sleeper (1) the speed of the wind at the ballast height in the area between sleepers is reduced.