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  Maldonado Project: Construction and Performance of two Tunnels for Flood Control in Buenos Aires

  As part of the Hydraulic Master Plan, designed by the Buenos Aires city government,the Maldonado basin flood control project was developed. The project comprises two alleviation tunnels, 4,5 and 10 km long, with an internal diameter of 6,90 m. The tunnels were bored using TBM machines with EPB procedures between 2009 and 2011. The tunnels alignments intersect a heterogeneous soil profile with hard silts, stiff plastic clays, silty sands, and sands; they penetrate to some extent into a semi-artesian aquifer. There are described herein the main features of the project, the construction methods, the monitoring system and its results, obtained during construction and the commissioning process.

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