Q191
In the construction of the Metro in Kolkata, ground settlement was mainly due to:
A.
Sand boils
B.
Fault displacement
C.
Loose alluvial deposits
AnswerD.
Rock bursting
Answer: Option C
Solution
Answer: Option C
Solution:
Loose alluvial deposits in Kolkata's subsurface led to significant ground settlement during metro tunneling. Compensation grouting and careful TBM operation were used to manage it.