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在公路测设中,一般采用切线支距法和偏角法进行缓和曲线的测设,这两种方法各有其优点,但在测设过程中均不够简捷,尤其是在恢复定线和施工测量中更为不便,因为切线支距法中的 X 值为零数,y 的方向常用十字架定出,难以控制准确,左右偏差较大,同时在量距中也不便。用偏角法架设仪器较麻烦。因而笔者用一种较简单而又适用的弦长斜距交会法来代替。现简述如下。
In the highway survey, the general use of tangent offset method and the deflection method to measure the easement curve, these two methods have their own advantages, but in the measurement process are not enough simple, especially in the recovery alignment and construction Measurement is more inconvenient, because the tangent offset method in the X value of zero, the y direction of the commonly used cross set, difficult to control accurate, left and right large deviation, while the amount of distance is also inconvenient. Using declination method to set up the instrument is more troublesome. So I use a more simple and applicable chord slant intersection method instead. Are summarized below.