Aktion-Preveza Tunnel

Preveza, Greece
HEIGHT: 8.55 m
WIDTH: 12.60 m
TOTAL IMMERSED LENGTH: 900 m
DEPTH AT BOTTOM OF STRUCTURE: 26.5 m
ENVIRONMENTAL CONDITIONS:
Earthquake loadings required strengthening of subsoil by means of stone columns.
FABRICATION METHOD:
The elements were constructed in a casting basin placed
in the alignment of the southern approach.
t103-aktion-preveza
Ministry of Environmental Planning and Public Works
Christiani & Nielsen Ltd and Technical Company of General Construction S.A.
4 - 134.5 m 2 - 119 m 1 - 75 m 1 - 49 m
900m
26.5m
8
One tube with two lanes
8.55m
12.6m
Earthquake zone
The elements were constructed in a casting basin placed
in the alignment of the southern approach.
Earthquake loadings required strengthening of subsoil by means of stone columns.
Catamaran type sinking rig and use of waterballast
Gina/Omega type joint in combination with posttensioning
rods across the joint.
HDPE sheet membrane to bottom and sprayed on modified Polyurethane membrane to
roof and sides.
Mortar pumped over gravel foundation bed.
0.75 m rock protection