scholarly journals Discontinuum models in three-dimensional hydromechanical analysis of the behaviour of concrete dam foundations

Geotecnia ◽  
2021 ◽  
Vol 151 ◽  
pp. 5-32
Author(s):  
Nuno Monteiro Azevedo ◽  
Maria Luísa Braga Farinha ◽  
Magda Sá ◽  
João Rocha de Almeida
Keyword(s):  
Three Dimensional ◽  
Concrete Dam ◽  
Hydromechanical Analysis ◽  
Dam Foundations

scholarly journals Study of the influence of temperature and water level of the reservoir about the displacement of a concrete dam

2016 ◽  
Vol 21 (1) ◽  
pp. 107-120 ◽  
Author(s):  
S.R. Oro ◽  
T.R. Mafioleti ◽  
A. Chaves Neto ◽  
S.R.P. Garcia ◽  
C. Neumann Júnior
Keyword(s):  
Water Level ◽  
Environmental Conditions ◽  
Canonical Correlation ◽  
Environmental Variables ◽  
Data Sources ◽  
Multivariate Techniques ◽  
Concrete Dam ◽  
Influence Of Temperature ◽  
Dam Foundations ◽  
Tank Water

Abstract Multivariate techniques are used in this study to analyze the monitoring data displacements of a concrete dam, measured by means of pendulums, extensometer bases and multiple rod extensometers, taking into account the action of environmental conditions, bounded by the surface temperature of the concrete at ambient temperature and the tank water level. The canonical correlation analysis is used to evaluate the influence of environmental variables in the displacement of structures and dam foundations. The factor analysis is used to identify data sources of variability and order the sensors according to the action of factors. The dates of the measurements are grouped according to similarities in the present observations, by applying the cluster analysis. Then the discriminant analysis is used to assess the groups as to their homogeneity. The results demonstrate that the techniques used for distinguishing the dam responses and identify the effects of changes in environmental conditions on the displacements of the structures and dam foundations.

scholarly journals Using Observational Method to Manage Safety Aspects of Remedial Grouting of Concrete Dam Foundations

2016 ◽  
Vol 34 (5) ◽  
pp. 1613-1630 ◽  
Author(s):  
Johan Spross ◽  
Fredrik Johansson ◽  
Lauri Kalle Tapio Uotinen ◽  
Jalaleddin Yaghoobi Rafi
Keyword(s):  
Observational Method ◽  
Concrete Dam ◽  
Safety Aspects ◽  
Dam Foundations

Hydromechanical analysis of gravity dam foundations

2018 ◽  
pp. 1233-1240
Author(s):  
N. Monteiro Azevedo ◽  
M.L.B. Farinha ◽  
G. Mendonça ◽  
I. Cismasiu
Keyword(s):  
Gravity Dam ◽  
Hydromechanical Analysis ◽  
Dam Foundations

À priori uplift pressure model for concrete dam foundations based on piezometric monitoring data

2020 ◽  
pp. 1-12
Author(s):  
Renato Pereira ◽  
António Lopes Batista ◽  
Luís Canhoto Neves ◽  
João Martins Casaca
Keyword(s):  
A Priori ◽  
Monitoring Data ◽  
Concrete Dam ◽  
Uplift Pressure ◽  
Dam Foundations

scholarly journals Numerical modelling of borehole water-inflow tests in the foundation of the Alqueva arch dam

2011 ◽  
Vol 48 (1) ◽  
pp. 72-88 ◽  
Author(s):  
M. L.B. Farinha ◽  
J. V. Lemos ◽  
E. Maranha das Neves
Keyword(s):  
Electrical Conductivity ◽  
Numerical Models ◽  
Three Dimensional ◽  
3D Models ◽  
Jointed Rock ◽  
Arch Dam ◽  
Water Inflow ◽  
Hydraulic Behaviour ◽  
Borehole Water ◽  
Dam Foundations

Borehole water-inflow tests allow measurement of discharges and water pressures in isolated sections of drains and piezometric boreholes. A series of water-inflow tests and water electrical conductivity analyses were carried out in an area of the foundation of an arch dam. Detailed three-dimensional (3D) numerical models developed for the analyses of the test data in two foundation areas are presented. Results of rock mass permeability tests and areas where seepage paths cross each drain, identified with both water-inflow tests and water electrical conductivity analyses, were taken into account. Models were validated against flow rates and water pressures recorded in situ. By examining water-inflow tests using numerical models, the main flow processes are identified and quantified. Test results and conclusions drawn from the detailed 3D models were used to elaborate a global model of the foundation. The present study shows that borehole water-inflow tests add valuable information to the usual monitoring data, which improves our ability to analyse the behaviour of concrete dam foundations. It is also concluded that although discontinuum models provide a more natural representation of flow in jointed rock masses, equivalent continuum models can still be used successfully to study both global and local hydraulic behaviour of dam foundations.

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