Estudo das chavetas da barragem de ligação direita de Itaipu

Abstract

After 40 years of the construction of the Itaipu Hydroelectric Plant, there are several long-term challenges that need to be carried out by the technical team to maintain the high level of excellence in monitoring the structure. For a professional to perform the Dam Behavior Analysis, it is important to know the project, how it was designed, how it was built to facilitate decision making. The shear keys were built to supply a deficiency in the foundation, a geological discontinuity identified by geotechnical tests during the construction phase. The purpose of the shear keys was to provide the necessary resistance against slipping and to reduce the deformability of the most critical features of the foundation. Knowing the history of the particular structural reinforcement and evaluating its efficiency after 40 years of construction is considered of high relevance for the analysis of the Structural Safety of the Itaipu Dam. The work aims to study the phenomenon of shearing in dam foundations, analyze the dimensioning of the shear keys of section E and evaluate the efficiency of the shear keys after 40 years of construction. The methodology used was theoretical, bibliographic and documentary research using the documents from the technical archive: technical reports, calculation memory, tests and drawings.