此法用于偏角法测设曲线时由任意点至任意点的偏角计算。将虚拟荷载加在虚拟梁上,所求得的支座反力即为偏角。虚拟梁长等于观测距离,虚拟荷载有两种:圆曲线为矩形匀布荷载;缓和曲线为三角形分布荷载。不必记公式,只要有简单力学知识的人,用起来都是很方便的。 This method is used to calculate the declination angle from any point to any point when measuring curve by declination method. The virtual load added to the virtual beam, the bearing obtained by the reaction is declination. The virtual beam length is equal to the observation distance. There are two kinds of virtual loads: the circular curve is a rectangular uniform load and the easing curve is a triangular distributed load. Do not have to remember the formula, as long as people with simple mechanical knowledge, it is very convenient to use.