Berne middle course

ARGE partner EI-ST:

• 2 overlapped bored pile construction pits, D=12 and 15 m; D=14 m
• 1,600 m tunnelling as a partial cut with compressed air from DN 2000 (OD 2400) to DN 3800 (OD 4700) with reinforced concrete pipes
• Diaphragm wall excavation D=1.20 m lamella thickness; 100 m long; 8 m wide and 36 m lamella embedment, 18 m of which in marl

ARGE partner Smet Tunnelling:

• 1600 m AVN tunnelling from DN 1200 (OD 1560) to DN 2800 (OD 3600) with reinforced concrete pipes
• 246 m microtunnelling from DN 300 to DN 800

EI-NW:

• 7 excavation pits in CSM construction with diameters of up to 10 m and lamella lengths of up to 19 m; excavation to a depth of 16 m
• Sinking of 8 lowering shafts up to 3.60 m in diameter with UW concrete bases
• Excavation of the SKU to a depth of 18 m
• Installation of double-layer excavation reinforcements up to HEM 1000
• Sheet piling work to secure the embankment
• Filling of excavation pits, partly with liquid soil mixed in-house
• Construction of prefabricated shafts, surfaces, earthworks, stream pipework, open installations, entry and exit sluices for the tunnelling work
• 13,600 m³ of reinforced concrete construction for structures on our own and with NU
• Disposal of 300,000 m³ of excavated soil from excavation pits and drives
• Construction and connection of 4 DN 1000 inspection shafts; T=up to 14 m to the tunnels