Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Hydrogeotechnical control system on a hydro-electric power plant with a basaltic foundation (Southern Brazil)
Summary The hydroelectrical power plant of Itaúba, in Rio Grande do Sul, Southern Brazil, due to a favourable topographic situation, takes advantage of a large curve of the river, in a steep valley. The concrete structures are located on a topographic narrow ridge on the right side of the valley. The rock foundation is formed by a sequence of basalt flows, intercepted by a family of inclined faults. The nature of this rock mass made necessary an effective and large drainage system, and a careful control of the hydrotechnical behaviour was developed before, during and after the impounding of the reservoir. It was possible to observe the response of the various confined and independent aquifers and the importance of a fault plane as the dominant drainage feature of the rock mass has been confirmed. The paper includes data regarding the reduction of high uplift pressures developed under some blocks of the intake structure. The main problem was to identify the causes and the critical paths of water flow. Finally, emphasis is given to the fact that the low cost hydrogeotechnical instrumentation of a rock mass, using the drainage system itself, can represent the key to control of the complete behaviour of the structural foundations. More sophisticated instrumentation may be not necessary at all.
Hydrogeotechnical control system on a hydro-electric power plant with a basaltic foundation (Southern Brazil)
Summary The hydroelectrical power plant of Itaúba, in Rio Grande do Sul, Southern Brazil, due to a favourable topographic situation, takes advantage of a large curve of the river, in a steep valley. The concrete structures are located on a topographic narrow ridge on the right side of the valley. The rock foundation is formed by a sequence of basalt flows, intercepted by a family of inclined faults. The nature of this rock mass made necessary an effective and large drainage system, and a careful control of the hydrotechnical behaviour was developed before, during and after the impounding of the reservoir. It was possible to observe the response of the various confined and independent aquifers and the importance of a fault plane as the dominant drainage feature of the rock mass has been confirmed. The paper includes data regarding the reduction of high uplift pressures developed under some blocks of the intake structure. The main problem was to identify the causes and the critical paths of water flow. Finally, emphasis is given to the fact that the low cost hydrogeotechnical instrumentation of a rock mass, using the drainage system itself, can represent the key to control of the complete behaviour of the structural foundations. More sophisticated instrumentation may be not necessary at all.
Hydrogeotechnical control system on a hydro-electric power plant with a basaltic foundation (Southern Brazil)
Guidicini, G. (Autor:in) / da Cruz, P. T. (Autor:in) / de Andrade, R. M. (Autor:in)
1979
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
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