Abstract
In order to optimize the stress condition, a rail top slope is usually set to the switch rail while a rail cant is set to the stock rail. Under the comprehensive influence of track alignment and wheel-rail force, the wheel-rail relationship of the guide curve is more special than that of ordinary tracks. However, the setting of rail top slope and rail cant follows the design value of ordinary tracks. Therefore, the design should be optimized accordingly. To solve this problem, several characteristic cross-sections on the guide curve are selected and analyzed by finite element method. The results show that the stress of rail head plays a control role in the design. Under the influence of large wheel-rail lateral force, different rail top slope and rail cant shall be set at different positions of the inner and outer rails of the guide curve. The outer rail should be designed with a rail top slope of 1:20 or 1:30, while the inner rail should be designed with a horizontal rail cant instead.
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