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1970年齐尔克斯克水电站的施工人员完成了大坝基坑的施工任务,获得极好的评价。其中,也有测量人员的一份功劳,他们进行了基坑设计轮廓的放样工作。为了使拱坝坝址准确地布置在基坑内,基坑开挖时的定线工作须保持均方差为±5厘米。峡谷边缘处的坝底基坑是从上而下进行开挖的。基坑轮廓放样使用的原始资料为施工详图,图上标有各轮廓点的坐标,并示有防护平台的标高和边坡的坡度。峡谷处坝基的基坑轮廓,是用极法算出的距离和角度从专门三角测量控制点开始放样
In 1970 the construction workers at the Qi Erkesk Hydroelectric Station completed the construction of the foundation pit of the dam and received an excellent evaluation. Among them, there is also a merit of the surveyors who conducted the setting out of the design pit of the foundation pit. In order to make the arch dam site accurately arranged in the foundation pit, the alignment work in the foundation pit excavation shall keep the mean square deviation of ± 5 cm. The foundation pit at the edge of the canyon is excavated from the top down. The basic information for the outburst of the excavation profile is the construction details. The coordinates of each contour point are marked on the map, and the elevation of the protection platform and the slope of the slope are shown. The foundation pit profile of the dam foundation at the gorge is to be staked out from a dedicated triangulation control point using the calculated distances and angles