Interpretation of the results of monitoring of the displacement of the Tresna dam in 2016

Abstract

Impounding structures are exposed to complex loads. Utilized in various conditions, they are subjected to different kinds of studies and longterm displacement surveys, as they could be exposed to the disturbance of stability principles. Building structures must be verified for safety not only at the operational stage, but at the design stage as well. Therefore, prototype tests are carried out to avoid construction failures and their consequences in the future [1]. The aim of the paper is to assess the technical conditions and level of safety of the Tresna dam located on the Żywiecki Reservoir based on the results of monitoring of the displacement in 2016. The obtained results were confronted with data on displacements from the period 2005- 2015. The scope of the research concerns mainly the issue of displacements monitored in the shell of the dam, the bottom outlet, the building of the hydroelectric power plant, the intake tower and the retaining wall. In addition to the measurements carried out at the dam also displacements on the area of the landslide near the building were monitored.