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一、问题的提出在河道、水库、道路的勘测和开发利用中,常常遇到两岸很高且极其险峻的悬岩绝壁地形,如仅取得一侧和对岸之岩顶,崖脚两点平面及高程位置,并不能绘出准确的横断面,对于设计施工就不能达到应有的精度要求。因此,必须在可能范围增设一些悬崖中间的点位,来满足断面的精度要求,但是那些要预设在悬崖中间的点位,人是根本无法攀登的。经多次总结演算,采用了经纬仪三角高程测量及三角公式进行推导演算,仅用两站测定竖角然后计算高差法即能确定待定点位置。
First, the issue raised in the survey, development and utilization of rivers, reservoirs, roads, often encountered on both sides of the high and extremely dangerous rock cliff topography, such as only get one side and the other side of the rock, the two foot plane and In the elevation position, an accurate cross section cannot be drawn, and the required accuracy cannot be achieved for the design and construction. Therefore, it is necessary to add some points in the middle of the cliff to meet the accuracy requirements of the section, but those who are to be preset in the middle of the cliff cannot be climbed. After summarizing the calculations several times, the theodolite trigonometric leveling and trigonometric formulae were used to push the director calculations. The determination of the position of the point to be determined can be made by using only two stations to determine the vertical angle and then calculating the height difference method.