Deformation analysis of an AFRD for mine tailings storage and power generation

Author(s): 
Osvaldo Nicolás Ledesma, Alejandro Verri, Alejo Sfriso
Date: 
Friday, September 22, 2017
First presented: 
19th International Conference on Soil Mechanics and Geotechnical Engineering
Type: 
Published paper
Category: 
Geotechnical

The numerical analysis of a 171m high asphalt-faced rockfill dam (AFRD) for tailings storage and power generation is presented for both static and seismic conditions. For static loading, the effect of compaction was investigated and FoS were computed in both 2D and 3D geometries. For seismic loading, 30 ground-motion records were selected from a large database using a proxy model and fed into 2D simulations, and four were run in 3D simulations. It is concluded that the design settlement of the dam is 1.2±0.2 m after construction and additional 5.4m for the design earthquake.

 

Feature Author

Osvaldo Ledesma

Osvaldo Nicolás Ledesma is a Senior Consultant at SRK´s Buenos Aires office, with experience in the design of foundations, excavations, tunnels, embankments and retaining structures for infrastructure and mining projects in Argentina, Peru, Paraguay, Uruguay, Canada and Papua New Guinea.  He has advanced knowledge of numerical methods for geotechnical structure design as well as experience in geotechnical field and laboratory testing. Osvaldo is currently pursuing a PhD in numerical modelling of soils in unsaturated conditions and serves as Assistant Professor of Soil Mechanics and Geology at the University of Buenos Aires.

Senior Consultant
Geotechnical Engineer
SRK Buenos Aires
Alejandro Verri

Alejandro Verri Kozlowski is the Practice Leader in Civil & Mining Infrastructure and the Chairman Director of SRK (Argentina). He is a Civil Engineer with more than 20 years of experience in structural engineering, geotechnical earthquake engineering and soil- structure interaction problems. He has a sound expertise in seismic hazard, reliability and vulnerability analysis of tailing and reservoir dams, wharves, tunnels, conduits and underground structures, with consulting services in Chile, Peru, Uruguay, Honduras, Costa Rica, México and Canada. As a Structural consultant, has led about a hundred projects in seismic analysis, structural and geotechnical design of civil buildings and mine site infrastructure facilities. Regarding his academic experience, he has been Professor of Mechanics of Composite Materials at the Faculty of Engineering of University of Buenos Aires for eleven years.

 

Practice Leader and Director of SRK Argentina
SRK Mendoza
Alejo Oscar Sfriso

Alejo O. Sfriso is a Principal Engineer with 25 years of experience in geotechnical engineering for infrastructure and mining works. He is an expert in the application of numerical methods for geotechnical design and analysis. In addition to his activity at SRK, he is the Director of AOSA - Geotechnical Laboratory, Professor of Soil Mechanics and Geology of the University of Buenos Aires, Vice President for South America of the International Society of Soil Mechanics and Geotechnical Engineering for the period 2017 - 2021, former Professor of Geotechnics at the National University of La Plata and former President of the Argentinean Society of Geotechnical Engineering.

Principal Consultant
PhD, Civil Engineer
SRK Buenos Aires
SRK Africa