高速铁路轨道扭曲不平顺是衡量轨道平顺性的参数,也是轨道几何形位不平顺的典型代表之一。本文主要通过扭曲不平顺的定义,用严密的数学方法推导扭曲不平顺计算方式的技术手段,比较了严密算法与用水平误差变化量来计算扭曲值的近似算法之间的差异,得出了用一定长度范围内(基长3m)的水平误差变化量来近似计算扭曲值是可行的,并以轨道实测数据进行了验证。 Uneven track of high-speed railway track is to measure the parameters of track smoothness, but also the track geometry is one of the typical irregularities. This paper mainly through the definition of distortions, using rigorous mathematical method to derive the calculation method of the distortion of non-smooth means of comparison between the rigorous algorithm and the use of horizontal error variation to calculate the approximate value of the difference between the distorted values ​​obtained by the use of It is feasible to approximate the value of twist by the horizontal error variation of a certain length (base length 3m), and verified by the orbital measured data.