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现在,具有圆弧、折线、抛物线等外形的建筑越来越多,这对施上放线人员提出了新的要求。在圆心可以找到时,圆弧放线比较容易。但如果因为某些原因找不到圆心时,圆弧放线就有一定的困难了。某宾馆工程的16层有凸出下层圆弧结构(见图1)。因为圆心 O 在建筑平面以外,不可能按常规方法以圆心为点、以半径为长画圆。在施工中,我们采用了分格定点的方法进行放线。具体做法如下。
Nowadays, more and more buildings with arcs, polylines, parabolas, etc., have created new requirements for the personnel who put them on line. When the center of the circle can be found, it is easier to place the arc. However, if the circle is not found for some reason, there will be some difficulties in the arc. The 16th floor of a hotel project has a convex lower arc structure (see Figure 1). Because the center of the circle O is outside the plane of the building, it is not possible to draw a circle by using the center of the circle and the radius of the circle in the usual way. In the construction, we used the method of dividing the grid to set the line. The specific approach is as follows.