Hydromechanical analysis of gravity dam foundations

N. Monteiro Azevedo, M. L. B. Farinha, G. Mendonça, I. Cismasiu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A fully coupled hydromechanical analysis of the water flow through the rock mass discontinuities of three hypothetical gravity dams of different height was carried out. It was assumed that the dams had similar rock mass foundations, and 2D discontinuous models were developed and analysed with the coupled model for dam foundation analysis Parmac2D-Fflow. This paper presents the results of studies done to analyse the influence that the model geometry and the aperture of foundation discontinuities have on the numerical discharges and hydraulic heads. Analysis was done assuming different behaviour scenarios: i) linear elastic and ii) non-linear behavior at the concrete/rock and rock/rock interfaces. Additionally, results obtained during cycles of filling and emptying the reservoir were used to establish the influence lines of the hydrostatic pressure on recorded discharges. The relevance of using fracture flow models of dam foundation rock masses that take into account the coupled hydromechanical behavior is highlighted.

Original languageEnglish
Title of host publicationNumerical methods in geotechnical engineering IX
EditorsAntónio S. Cardoso, José L. Borges, Pedro A. Costa, António T. Gomes, José C. Marques, Castorina S. Vieira
PublisherCRC Press/Balkema
Chapter42
Pages1233-1240
Number of pages8
Volume2
ISBN (Print)9781138544468
Publication statusPublished - 2018
Event9th European Conference on Numerical Methods in Geotechnical Engineering, NUMGE 2018 - Porto, Portugal
Duration: 25 Jun 201827 Jun 2018

Conference

Conference9th European Conference on Numerical Methods in Geotechnical Engineering, NUMGE 2018
CountryPortugal
CityPorto
Period25/06/1827/06/18

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Monteiro Azevedo, N., Farinha, M. L. B., Mendonça, G., & Cismasiu, I. (2018). Hydromechanical analysis of gravity dam foundations. In A. S. Cardoso, J. L. Borges, P. A. Costa, A. T. Gomes, J. C. Marques, & C. S. Vieira (Eds.), Numerical methods in geotechnical engineering IX (Vol. 2, pp. 1233-1240). CRC Press/Balkema.