Excavation, retaining wall and deep foundations solutions for an office building at Alcântara – Lisbon
Excavation, retaining wall and deep foundations solutions for an office building at Alcântara – Lisbon
This paper presents the proposed solutions for the excavation works, retaining wall and deep foundations necessary for the construction of 4 underground floors of two office buildings at Alcântara, adjacent to Avenida da Índia, in Lisbon. The main existing constraints were archeological, geological, hydrogeological, geotechnical and the neighbourhood conditions, which determined the choice of the retaining wall solution and respective horizontal support. Diaphragm wall technology was used for the retaining wall combined with a top-down sequence to assure the horizontal support. The solutions adopted for the deep foundations are also described, namely the use of high-capacity base grouted bored piles. Particular emphasis is given to archaeological aspects, which strongly determined the top-down solution and construction sequence. Finally, the main results of the monitoring devices are presented as well as the changes implemented during the works determined by differences between the measurements and the design estimations.
R. Tomasio; F. Veloso; N. Rosa
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
D - Current and new construction methods
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