Civil Engineering Reference
In-Depth Information
Fig. 3.6
The caisson during
immersion
The tunnel installations
The usual installations have been fitted in the tunnel, such as:
- power supply;
- lighting;
- ventilation (tunnel and cross connections);
- various pump installations;
- traffic signposting and guiding;
- fire extinguishing system;
- emergency posts;
- communication equipment.
Fig. 3.7
Cross section of a
tunnel tube
Jet-fan
Heat-resistant
cladding
Emergency post
Grout layer
Roadway
Sand-cement
backfill
Tunnel lining (0.45 m)
Cable gallery with mini vehicle
Taking into consideration the positioning, length and shape of the tunnel, a
number of facilities deviate from the usual types. For example, on both
banks the tunnel is provided with a medium-voltage connection onto the
public network. In principle, the installations for the power supply on both
banks are identical.
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