Analysis of the technical condition of the dam at the Sayano-Shushenskaya HPP based on measurements of radial displacements and angles of incline of horizontal segments

Radial displacements and angles of rotation of horizontal segments of the dam at the Sayano-Shushenskaya HPP are analyzed. The primary purpose of the analysis was to evaluate the technical condition of the dam based on measurements of diagnostic indicators by geodetic methods, and to establish the existence of residual (irreversible) displacements of the dam prior to and after the failure. Data derived from field measurements during the period after the completion of repair work (May 2004 – May 2010) served as initial data. Field measurements from an earlier period were not utilized, since the structure of the dam prior to its repair differed from the structure that existed after the repair (from 1996 through 2003, large-scale overhaul operations were conducted in the concrete located at the thrust face of the dam, and in the near-contact zone of its bed).