Carrousel shaft. Socatop. Versailles
Circular shafts excavated inside a pre-formed cylindrical diaphragm wall only began to develop in a major way when modern plant became capable of digging almost perfectly vertical walls such that the cylinder can be considered self-stable without having to be tied back with ground anchors, or strengthened with struts or reinforced concrete rings.
Circular diaphragm walls have many uses (TBM starting shafts, access and ventilation shafts, underground car parks, shafts for industrial plant, bridge pier foundations, etc.).
Work : METROS,RAILWAY WORKS,SHAFTS | Year : 1996 | Location : FRANCE
Ground freezing with liquid nitrogen for construction of two emergency access shafts.
Work : SHAFTS | Year : 2005 | Location : BELGIUM
Construction of a circular shaft to take a gas reservoir.
Work : METROS,RAILWAY WORKS,SHAFTS,TUNNELS | Year : 2001 - 2005 | Location : FRANCE
Construction of 1.1 km of tunnel, an underground station and 2 shafts.
Work : ROAD STRUCTURES,SHAFTS | Year : 2005-2006 | Location : FRANCE
Circular diaphragm wall for a deep shaft.
Work : METROS,RAILWAY WORKS,SHAFTS,TUNNELS | Year : 1993 - 1996 | Location : FRANCE
Construction* of 2 150 linear metres of a 6.80 m dia. tunnel and three underground stations.
Work : METROS,RAILWAY WORKS,SHAFTS | Year : 1997 - 2000 | Location : THAILAND
Construction of nine stations and associated works for Bangkok's first underground railway line.
Voyage au coeur de l'ingénierie de pointe
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