Monitoring of Dam Movements Using Laser Light

by Don Slobodnik, Surveyor; Omaha District, U.S. Army of Engrgs., Omaha, Neb.,
Edward F. Roof, Geodesist; U.S. Army Engr., Topographic Lab., Ft. Belvoir, Va.,

Serial Information: Transportation Engineering Journal of ASCE, 1980, Vol. 106, Issue 6, Pg. 829-843

Document Type: Journal Paper


A description of two methods using laser equipment to monitor dam movements is given. The first method describes the use of a laser alinement instrument to detect movement of selected points preferably within galleries of concrete dams or other areas where atmospheric refraction changes are very small. The second method describes a trilateration technique using laser electronic distance measuring equipment, and a modeling procedure that greatly reduces the effects of dynamic atmospheric refraction on the accuracy of movement determination.

Subject Headings: Concrete dams | Dams | Lasers | Model accuracy | Electronic equipment | Detection methods | Distance measurement | Dynamic models

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