ABSTRACT
The use of Global Navigation Satellite System (GNSS) displacement monitoring technology enables permanent and remote monitoring of large dams. The validation of GNSS displacements monitoring system installed in Cabril dam since 2016 has been accomplished by comparing the GNSS measurements not only with triangulation and plumb line methods, but also with Finite Element Models (FEM) and Hydrostatic-Seasonal-Creep-other Time effects (HSCT) models for effects separation. Analysis of a 7-year monitoring period has demonstrated the precise and reliable nature of this method, as it successfully detected the development of pathological behaviour trends associated with concrete swelling reactions.
