Evaluation of the state of the dam and rock foundation of the Zeya hydroelectric station
The result of on-site observations of the behavior of section joints and horizontal displacements as well as of the stress state of the dam and strains of the rock foundation show that individual sections of the dam, primarily at high elevations, are able to shift relative to one another both in longitudinal and transverse directions. It is admissible to assume the existence of only constant local force contacts between the heads of individual sections.
A geodynamic effect on the structures from the surrounding rock masses undoubtedly takes place. However, the level of this effect and the reaction of the structure to it according to the data given in  with respect to the stress-strain state of the dam and foundation cannot be considered substantiated.
The actual characteristics of the geodynamic effect on the structure can be determined only after eliminating other factors influencing the monitored indices of its state. The values of the indices of the state of the structure should be determined with the use of a mathematical model of its behavior, with consideration of the entire spectrum of loads and climatic effects applied to it.
KeywordsForce Contact Horizontal Displacement Adjacent Section Rock Foundation Surround Rock Mass
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