Observed behaviour of the structures for the power increase of the Miranda hydroelectric project

Abstract

This paper describes the structures for the repowering of the Miranda hydroelectric scheme that consisted in construction of a new hydraulic circuit and a semi-buried powerhouse. Geomechanical tests carried out for the mechanical, hydromechanical and in situ state of stress characterization are described. Monitoring plans were established for controlling the safety of the structures during constructing and first use phases. Some significant results observed are presented and compared with numerical results.