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THE PHOTOGRAMMETRIC MEASUREMENT OF CONSTRUCTIONAL DISPLACEMENTS OF A ROCKFILL DAM
Author(s) -
Moore J. F. A.
Publication year - 1973
Publication title -
the photogrammetric record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.638
H-Index - 51
eISSN - 1477-9730
pISSN - 0031-868X
DOI - 10.1111/j.1477-9730.1973.tb01203.x
Subject(s) - photogrammetry , geology , geotechnical engineering , upstream (networking) , position (finance) , froude number , engineering , geometry , mathematics , remote sensing , telecommunications , flow (mathematics) , finance , economics
A phototheodolite was used during the construction of Llyn Brianne dam to provide stereoscopic coverage of both upstream and downstream shoulders of the dam at each of eight stages of construction. Ground control was established on the valley sides, together with 80 targeted points at various levels on the dam as it progressed. The co‐ordinates of the targeted points were determined numerically using a Wild A7. Three dimensional displacements were determined from the change of position to an average accuracy of 0–05 m. Agreement was obtained with independent and more precise measurements and comparisons are made with the upstream displacements. The assumptions of an analytical prediction technique are examined. Profile lines through the dam were also obtained numerically to record the progressing shape of the dam.