Several innovative
shield tunneling methods have been developed in Japan to enable
the construction of tunnels of almost any cross-section shape.
They include overlapping circular tunnels, such as the Double-O-Tube
(DOT), Triple Face (TF) and Multi-Face (MF) types, as well
as shields equipped with computerized arms that can be used
to dig a tunnel in virtually any shape. NCC carries out lining
design and construction supervision for these innovative shield
tunnel types. We are also active in research and development
for the continual advancement of the technology used in their
construction.
NCC designed the segment linings and performed construction
supervision for the following special shield tunnel projects.
Lining Design for Double-O-Tube (DOT) Shields
|Kikuta-River No.2 sewerage trunk tunnel, 1991 (diameter : 4.45 m, width
: 7.65 m, tunnel length : 586 m)
|Tokyo Metropolitan Subway Line 12 Special Section tunnel, 1998 (diameter
: 6.3 m, width: 12.92 m)
|Shanghai Subway Line, 2002 (diameter: 6.52 m, width: 11.12m, tunnel
length: 1,700 m)
|Hiroshima Astorum Line,1989. Designed by Nippon Koei Ltd., with which
NCC is an affiliate company
Construction Monitoring of Some Special Specific
Shield Tunnels
|East Japan Railway, 1999: segment lining of a Multi Faced type shield
tunnel (diameter : 7.2 m, width : 11.97 m, tunnel length : 619 m)
|Segment lining of a DOT type shield tunnel, 1993 (Multi-service tunnel
in Ariake District, diameter: 9.1 m, width: 15.6 m)
|Triple circular-face slurry shield tunnel segment lining (Tokyo Metropolitan
Subway Line 12, Iidabashi station tunnel, Width: 17.1 m, height: 7.8
m) |