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曲线半径是铁道建筑的重要技术标准,它关系到行车速度、国家投资的多少、新线建设和运营后养护维修等多方面问题,是一个需要慎重进行讨论的学术问题。本文论证了曲线半径计算的三个公式的相互关系和应用范围;指出了不考虑速度差、用最大超高求得最小半径的传统计算公式的缺陷;探索到超高及过超高在曲线半径计算公式中的变化规律;阐述了过超高对钢轨磨耗的影响及其容许值;试图为曲线半径设计探索出一种计算办法,为规改提供参考。
Curvilinear radius is an important technical standard for railway construction. It relates to driving speed, the amount of state investment, maintenance and repair after construction and operation of a new line, and other issues. It is an academic issue that needs careful discussion. This paper demonstrates the relationship between the three formulas of curve radius calculation and its application range. It points out the shortcomings of the traditional formulas of calculating the minimum radius without considering the speed difference and the maximum height. The variation law in the calculation formula is expounded; the influence and the allowable value of over-ultra-high on the rail wear are expounded; a calculation method is attempted to explore for the design of the curve radius so as to provide a reference for the regulation.