The Vista tower Buenos Aires. Case of deep and complex excavation in urban area

Author(s): 
Tomás Laría, 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 Vista Tower is a building project under construction in the Palermo neighborhood of Buenos Aires, Argentina. It is a 36-storery tower for offices and residences, built on a structure composed of 5 underground and 2 above-ground levels, reaching depths of 18.50 meters at the excavation works. The project presents many different constraints all over its perimeter: the excavation is surrounded by buildings with heights ranging from 4 up to 14 storeys. The excavation is located at ten meters from the metro tunnels and the Scalabrini Ortiz metro station of the Line D of the Buenos Aires metro network. The stratigraphic geotechnical profile shows soils from the Pampeano formation which contains silts and clays with variable levels of cementation, very common all around the city. All these factors make this excavation one of the deepest and most challenging in recent years in Buenos Aires. This project is a landmark in the construction of large excavations in Buenos Aires, because it is a leading case for the enforcement of the updated code for excavations of the City (Code of building of the city of Buenos Aires; Buenos Aires Parliament. (2013), Law 4580). After approval of this law, the use of temporary anchors crossing the boundaries of the property is allowed, provided the neighbours are informed and that all safety provisions are taken. In this paper we describe the support methods and the construction procedures employed in the excavation, along with their evolution and adjustmene after field observation are presented.

 

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 Latin America