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在公路测量中,计算工作是非常重要的。乍看去似乎是简单的加加减减,没有奥妙的计算,其实这项工作是在测量中最易出差错的。在测量山区公路时,由于地形复杂,弯道往往多得一个接连一个,计算工作感到十分繁忙,发生差错的现象也就会越多。为杜绝差错,及时校错为正,现将自己在测量中的一点体会介绍一下。我们知道:在相同半径曲线内,切线长和曲线长是随折角大小成正比关系的,为此,中线交点桩的里程亦恒大于平面曲线中点桩的里程(如下图)。
Calculating work is very important in highway surveying. At first glance it seems to be a simple addition and subtraction, there is no secret calculation, in fact, this work is the most error-prone in the measurement. In the measurement of mountainous roads, due to the complex terrain, often one after another bend, computing is very busy, the phenomenon of error will be more. In order to put an end to errors, timely proofreading is positive, now I will introduce myself in the measurement experience. We know that in the same radius curve, the tangent length and the curve length are proportional to the size of the angle. For this reason, the mileage of the midpoint intersection point pile is also always greater than that of the midpoint pile in the plane curve (as shown in the figure below).