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Abstract: The Lot 1 of Paris metro line 11 consists in 3,6km of tunnels and 4 underground stations in an urbanized environment. The design has been performed by SYSTRA, construction has begun in 2016. The station “Dhuys” consisting of a deep shaft and a 50m long mined tunnel will be realized in the plastic and expansive marly soils of “Ludien” through an instable slope beneath several buildings with a...