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一、前言水工建筑物的过水部分,其平整度要求比较高。为此,竣工后需进行检定。这一工作用常规方法在现场实测,很费时力。为了减轻劳动强度,提高工效,我们试用地面摄影测量方法进行葛洲坝二江泄水闸闸墩平整度的测定。量测精度要求为±5毫米。过去,我们从事地面摄影测量还未涉及高精度的工作,因此,我们将工作分两阶段进行。第一阶段包括确定控制点的数量和分布,以及特定点的精度试验。第二阶段施测葛洲坝二江闸墩过流面的平整度。通过两个阶段的工作,达到了预期精度要求。
First, the preface Hydraulic structures of the water part of its flatness requirements are relatively high. To this end, after the completion of the test required. This work is routinely measured in the field and is time-consuming. In order to reduce labor intensity and improve work efficiency, we try the ground photogrammetric method to determine the flatness of pier of Gezhouba Erjiang sluice gate. Measurement accuracy of ± 5 mm. In the past, we did not do high-precision work on ground photogrammetry, so we did the work in two stages. The first phase includes the determination of the number and distribution of control points and the accuracy testing of specific points. The second phase of Gezhouba two pier pier flow surface roughness. Through the two stages of work, reached the expected accuracy requirements.