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根据施测经验,采用垂球测斜器来施测横断面,定向精度和垂直角度施测精度都较好,展绘也比较方便,特作如下介绍。一、制做测斜仪将一块21厘米宽、40厘米长的小木板推平、刨光,制成严格的矩形。在矩形一长边的1厘米处绘一平行线。在平行线上钉上三颗涂色的大头钉、两头各一颗,正中间二分之一处一颗,设为0点。以0点为圆心,20厘米为半径绘一半圆,通过0点作平行线的垂线,交半圆一点为0°。然后分别向左、右各刻60°。制好后用小钉将0点打在十字仪支撑脚的1米处,宜稍微转动即可。在0点钉子上挂上一垂球。
According to the test experience, the use of vertical ball test analyzer to measure the cross-section, the accuracy of orientation and vertical angle measurement accuracy are better, the exhibition is also more convenient, especially for the following description. First, make inclinometer Will be a 21 cm wide, 40 cm long wood plank flat, planed, made of strict rectangular. Draw a parallel line at one centimeter of the long side of the rectangle. Nail in the parallel line with three painted tacks, two each one, the middle of a half, set to 0:00. To 0:00 as the center, 20 cm radius for the painted half a circle, 0:00 as a parallel line of the vertical line, cross the semi-circular point 0 °. Then respectively left and right engraved 60 °. After the system is made with a small nail 0:00 hit the cross instrument support foot 1 meter, should be slightly rotated. Hang a ball at 0 o’clock.