Laouzas dam: behavior of a thin concrete arch dam located in a wide valley and foundation stability improvement
Publish place: 4th International Conference on long-Term Behavior and Environmentally Friendly Rehabilitaion Technologies of Dams
Publish Year: 1396
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
LTBD04_034
تاریخ نمایه سازی: 25 آذر 1396
Abstract:
Through the example of Laouzas dam owned by Electricité de France, this paper presents the mechanical behavior of a thin concrete arch dam located in a wide valley. From the first impoundment of the reservoir, this dam was affected by an opening of the rock-concrete interface near the central cantilevers. The reinforcement of the monitoring system, in particular the installation of piezometers at the downstream part of the dam-foundation contact, enhanced the progression of pore pressure in this zone beyond the generally admitted hypotheses. In order to explain such situation and to evaluate the consequences, Enite-element analyses taking into account hydro-mechanical modeling were performed. They helped in understanding the observed phenomena and described the conditions of the dam- foundation thrust transmission towards downstream in the central part of the foundation. On Laouzas dam, after study of different solutions of reinforcement, local foundation reinforcement downstream ofthe central blocks was decided and implemented
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Authors
emmanuel robbe
Eleetrieité de France - Hydro Engineering Center - Le Bourget du Lac
francois morel
Eleetrieité de France - Hydro Engineering Center - Le Bourget du Lac