Q165
The Niagara Tunnel Project encountered which geological hazard?
A.
Gas pockets
B.
Loose moraine
C.
Fault gouge
D.
Karst cavities
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
Engineers faced karst features (cavities in limestone) which posed water ingress risks. These were sealed using pre-injection grouting and real-time monitoring.