866 - PROBLEMS OF LARGE RELIEF OR WEATHERED SHEAR JOINTS IN GRANITES AND BASALTS IN BRAZILIAN DAM FOUNDATIONS *G.R. Sadowski University of São Paulo. R Prof. Guilherme Milward 246 São Paulo, SP, Brazil, 05506-000 (*Corresponding author: sadowski@usp.br) ISRM Congress 2015 Proceedings - Int’l Symposium on Rock Mechanics - ISBN: 978-1-926872-25-4