TUNNEL BORING MACHINE

Tunnel Boring Machine is also known as a "Mechanical Mole"

• TRUE

• FALSE

Answer explanation

The Tunnel Boring Machine (TBM) is still called a “mechanical mole” in the United States, almost as if to underplay this impressive technology rather than to accentuate the pioneering aspect of being able to unite two points through a large excavation underground, under the sea, or under a river.

Soft ground tunnels are

• deals with weak rock formation

• at cover depth of 2 times diameter

• usually use Tunnel Boring Machine

• all of them

Tunnel use for

• conveyance material

• transportation

• military defense

• water conduction

• all of them

Rate for tunnel advancement a day (for Tunnel Boring Machine, TBM)

• depends on tunnel size

• depends on ground properties

• 10 m /day

Tunnel is an artificial underground passage, especially one built through a hill or under a building, road, or river that carry the load itself

• TRUE

• FALSE

The most important potential loads acting on underground structures are

• earth/rock pressure

• water pressure

• earth/ rock pressure and water pressure

• loads due to vehicle traffic

• all of them

Tunnelling issues includes

• stability of tunnel

• lining structure

• deformations

• all of them

What lenght can a Tunnel Boring Machine cut and clear in one day?

• 15-20 metres

• 25-30 metres

• 50 metres

• 100 metres