Q176
The primary reason for tunnel lining design changes in Bengaluru Metro was:
A.
Groundwater ingress
AnswerB.
Fault displacement
C.
Soft alluvium
D.
Traffic vibrations
Answer: Option A
Solution
Answer: Option A
Solution:
During construction of the Bengaluru Metro, unexpected groundwater ingress prompted the use of waterproofing membranes and reinforced concrete linings to prevent seepage and ensure tunnel longevity.