Behaviour of Portuguese rockfill dams with upstream impervious membranes

摘要

There are 7 rockfill dams with upstream impervious membrane in Portugal, 4 of them built in the last 12 years. In the paper, some aspects of the experience acquired by the National Laboratory of Civil Engineering (LNEC) in this kind of structures are presented, including a brief description of the dams and some of the most significant monitoring results, particularly those related to movements.