Q141
Which project demonstrated successful use of tunnel boring machines in fractured rock conditions?
A.
Panama Canal Expansion
B.
London Crossrail
C.
Pir Panjal Railway Tunnel
AnswerD.
Hoover Dam Tunnel
Answer: Option C
Solution
Answer: Option C
Solution:
The Pir Panjal Tunnel (India) used TBMs in complex Himalayan terrain with fractured rock and water ingress, managed with shotcrete and steel ribs.