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Tunnels in Buenos Aires. Development of construction procedures 1998-2009

Alejo Sfriso
Saturday, March 26, 2016
First presented: 
ITS Seminar, Buenos Aires, Argentina

Buenos Aires, Argentina, is expanding its metro network. Some 17 km of new tunnels have been excavated between 1998 and 2009, and some 20 km are scheduled for construction in the near future. Many major improvements have been implemented during these years in the fields of design and construction procedures of NATM tunnels. Some of the achievements and lessons learned are described in this paper, including: characterization of Buenos Aires soils for the numerical modeling of NATM tunneling, description of the design and construction procedures in use and some comments on the observed ground behavior during construction. The paper is an update of (Sfriso 2008).

Feature Author

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.

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PhD, Civil Engineer
SRK Buenos Aires
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