CLASSIFICATION OF TUNNELS
Tunnels on this basis can be classified as:
i) Traffic-Tunnels. For carrying traffic such as
a) Railways tunnels.
b) Highway tunnels.
c) Pedestrian tunnels.
d) Navigation tunnels.
e) Subway tunnels etc.
ii) Conveyance tunnels. For conveying utilities such as
a) Hydro-electric power tunnels.
b) Water supply tunnels.
c) Tunnels for intake & conduit of public utilities.
d) Sewer-tunnels
e) Transporting tunnel in industrial plant etc.
◆Classification based on type of ground
Such as
a) Tunnels in hard rock.
b) Tunnels in loose sand.
c) Tunnels in quick sand.
d) Open-cut tunnels.
e) Submarine tunnels or tunnels in river bed etc.
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