Q26
In the case of the Metro tunnel beneath the Hooghly River, which technique was used to avoid water ingress?
A.
Pre-grouting
B.
Compressed air tunneling
C.
Slurry shield TBM
AnswerD.
Jet grouting
Answer: Option C
Solution
Answer: Option C
Solution:
A slurry shield Tunnel Boring Machine was used under the Hooghly River to balance water pressure and prevent ingress.