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在施工过程中,我们经常会遇到圆弧的测设,有时无法采用圆心及半径划弧或极坐标法进行放线,这时可用矢高法测设圆弧。如图1所示,设计条件为:AB间距64m,圆曲线半径R=125m。具体做法如下。 1.将欲测设圆弧的弦长等分,如将AB距离64m八等分,得到间距为8m的O′、l、2、3点。 2.计算弦心距00′(各点矢高计算均用到此数据),如图2所示。其计算公
In the construction process, we often encounter the arc of the test set, and sometimes can not use the center of the circle and the radius of the arc or polar coordinates for the release line, then you can use the vector height method to set the arc. As shown in Figure 1, the design conditions are: AB spacing 64m, radius of round curve R = 125m. The specific approach is as follows. 1. Divide the chord length of the arc to be measured. For example, divide the AB distance by 64m into eight equal parts to obtain O’, l, 2, and 3 points with a distance of 8m. 2. Calculate the string center distance 00’ (each point vector height calculation uses this data), as shown in Figure 2. Its calculations