ABSTRACT
This paper refers to the excavation and retaining wall solutions for a residential development located in Lisbon, where part of the basement structure is located 4m above the Lisbon Metro (ML) tunnel crest. The constraints related to the execution of peripheral earth retaining walls are discussed, using the technology of Munich Walls, Berlin Walls, and Mixed Walls, duly adapted to the existing constraints. Finally, the results of the Monitoring and Survey Plan are pointed out, confirming its importance as risk management tool in a work of high geotechnical complexity and located very close to very sensitive structures, as it was ML tunnel.
