论文部分内容阅读
在公路测设工作中,由于路基横断面的数量多,因此画横断面带帽子的工作量就很大,目前一般是用透明模片(如图一)来进行这项工作的。这种模片的路基面和边沟部分是雕空的(参看图一),画断面时,可按模片用铅笔直接画出路基面线和边沟线。画边坡线时,则须先沿模片边缘,点出所要采用的坡比(像用量角器画角度一样),再用三角板或模片的直边连接,画出边坡线。下面介绍一种在这种模片的基础上改进了的模片:
In highway surveying and mapping, because of the large number of roadbed cross-sections, there is a great workload in drawing cross-section hats. At present, this work is usually done with transparent molds (Figure 1). The subgrade and ditch part of the die is carved (see Figure 1). When drawing the cross section, the subgrade surface line and the ditch line can be directly drawn by pencil. Draw the slope line, you must first along the edge of the mold, point out the slope ratio to be used (as with the angle of the protractor), and then use the straight edge of the triangle or die connected to draw the slope line. Here is an improved on the basis of this model die: