Q79
What was the innovative solution adopted for tunneling in water-bearing ground in Kolkata Metro�s East-West corridor?
A.
Drill and blast
B.
Compressed air shield tunneling
C.
Slurry shield TBM
AnswerD.
Vertical shaft sinking
Answer: Option C
Solution
Answer: Option C
Solution:
The East-West corridor used Slurry Shield Tunnel Boring Machines to control face pressure and water inflow while boring under the Hooghly River.