REINFORCED CONCRETE SLEEPER WITH HIGHER RESISTANCE TO SHIFT IN BALLAST Russian patent published in 2011 - IPC E01B3/34 

FIELD: construction.

SUBSTANCE: prestressed reinforced concrete sleeper with higher resistance to shift in ballast comprises a middle part and two symmetrical under-rail parts. The sleeper is reinforced with prestressed rods. Ends of rods are protected at the ends of the under-rail part of the sleeper. The ratio of areas of the end of the under-rail part of the sleeper and in the middle section of the sleeper is determined on the basis of the ratio 1.3≤S/S1≤1.33 or on the ratio 1.35≤S/S1≤1.6. The sleeper is reinforced with at least three rods with a crescent-shaped profile. Ends of the sleeper rods are protected with plastic plugs or are closed with a cement and sand mortar.

EFFECT: increased crack resistance, strength and rigidity of a reinforced concrete sleeper.

4 cl, 3 dwg