Crossing of Line H under Line D, Buenos Aires Metro. Logistical challenges, construction and design.

Author(s): 
Jorge Laiún and Alejo Sfriso
Date: 
Sunday, November 15, 2015
First presented: 
XV Panamerican Conference on Soil Mechanics and Geotechnical Engineering
Type: 
Article
Category: 
Geotechnical

The Metro Line H in Buenos Aires, Argentina runs North-South, at the west side of the city's downtown area. The northbound extension of the line started in 2011 using conventional tunnelling methods and is close to completion. Two kilometers of tunnels and three cavern stations, namely Córdoba, Santa Fe y Las Heras stations, were excavated in stiff cemented silts and clays. Close to Santa Fe Station, the tunnel crossed two simple underground tunnels belonging to Line D. These tunnels remained operational and were not interrupted by the construction of the new tunnel, albeit the fact that the new tunnel is in direct contact with the foundations of the side walls of the old tunnel, and that it had no structural invert. In this paper, some design aspects, the logistics and construction issues of the project are described.

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.

Principal Consultant
PhD, Civil Engineer
SRK Buenos Aires
Jorge Laiun

Jorge has worked on problems of tunneling and underground works since 2004. He has participated in the geotechnical and structural design as well as in the optimization of construction procedures of tunnels for the underground network of Buenos Aires and Santiago. His expertise includes rock tunnels for mining in a variery of projects located in Argentina and Chile. Jorge has 13 years of experience and participation in the design of geotechnical and structural projects. He has focused his experience in the design using numerical methods applied to geotechnics.

Principal Consultant
Geotechnical & Structural Engineer
SRK Buenos Aires
SRK United Kingdom