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- Title
双线货运铁路天窗点外CPⅢ平面测量方法研究.
- Authors
魏 涌
- Abstract
In order to solve the problem of the CP III plane control network of the double track freight railway being unable to be measured outside the skylight point during the operation period, a measurement method of bilateral free measuring stations was proposed. By setting up a total station on the shoulders outside the existing railway ballast bed slope toe (gauge), the distance and angle relationship between the total station and the left and right CP III points of the same side, as well as multiple CP III points on the opposite side, were obtained. The results in a corner intersection network contained a large number of direction and distance observations between CP III points and the free measuring stations. The coordinates of CP III points were calculated using the corner network adjustment method. The experiment shows that, the accuracy indicators of the CP III plane measurement free network and constrained network adjustment of the bilateral free measurement stations can meet the relevant requirements of the railway engineering measurement specifications. Compared with conventional measurement methods, the accuracy indicators of control network adjustment such as direction adjustment results, distance adjustment results, mean square error of the weakest point position, and relative mean square error of adjacent points have all been improved. The maximum difference in coordinates of CP III point.
- Publication
Railway Investigation & Surveying, 2024, Vol 50, Issue 3, p34
- ISSN
1672-7479
- Publication type
Article
- DOI
10.19630/j.cnki.tdkc.202311070001