What are the characteristics of a curved track compared with a straight one?
The design should be gradually increased from light to heavy principle, according to the road train design speed of main operation conditions and recent forecast volume in accordance with the provisions of table 2-1 selection.
Rail function:Take the wheel load directly and transfer it to the sleeper, guide the wheel of the train; provide the least resistance surface for the wheel roll.In electrified railway or automatic block section, rail has the function of track circuit.Requirements for rails:Sufficient strength, stiffness and surface should have good smoothness and wear resistance. When the wheel passes, the rail will not deform too much, so as to reduce the dynamic impact between wheel and rail.Rail type: expressed by the mass kilogram per meter. The main types of rail in China are 75, 60, 50, 43, four types, and their quality per meter is 74.414, 60.64, 51.514, and 44.653kg, respectively. Rail 60 is widely adopted in the speed increasing main line and the high-speed railway. 75Rail is used on heavy haul lines.
The tracks of newly constructed and converted railways shall be determined according to the function, nature, speed and annual total mass of the design line in the railway network. The selection of track components should be based on the need of transportation, improve the carrying capacity of the track structure and the base surface of the track, realize the reasonable matching, and meet the requirements of standardization, serialization and generalization.
Railway line rail type in our country is divided into heavy, heavy, heavy, medium and light.
