Consolidation for protection of the excavation of a section of the tunnel for access to the subterranean chalk cave in the side of Montmorency (Val d’Oise Region, 20 km north of Paris).
1998 | 1999
Jet Grouting consolidation for Baillet North entrance tunnel construction under populated area with buildings, to avoid possible settlements - sand, limestone, clay, marl and gypsum layers - installed over 200 Ø 600 mm columns - maximum drilling length over 55 m - total Jet Grouting about 3.000 m - unconfined compressive strength 4 MPa at 28 days.
