曲线测设方法探讨

铁路公路等曲线测设中,多少年来都是用切线支距法和偏角法。这两种方法都要求必须先测设曲线主点,然后在曲线上(包括端点)设站,再详细测设。长曲线或测设中遇障碍,须搬动仪器多次设站才能测完一曲线,很不方便,而且野外工作量大。本文提出自由测站极坐标法测设曲线,可以任意选择测站位置,不仅工作方便,而且效率高。文章详细介绍了这一新的作业方法,计算公式,并给有实例。

AN INQUIRY INTO THE METHOD OF SETTING OUT AND SURVEYING A CURVE

The tangent offset method and the deflection angele method have been applied to setting out and surveying the curves in railways, highways and so on for many years. Both the methods are required the principal points of the curve to be surveyed and set out at first, and then the details to be set out. It is very unconvenient to set out and survey a long curve or to move the instruments from time to time when obstacles are met in surveying. According to these methods, a great deal of field work must be done to set out and survey a curve.This paper puts forward a new method called the free survey station of the polor coordinate method. It is not only very convenient, but also high efficient, because the station location can be chosen freely.In this paper, the working processes and the calculation formulae of the new method ar/e introduced in details.There is an example in the end.