Q67
What key lesson was learned from the Nicoll Highway collapse in Singapore?
A.
Ignoring rainfall intensity
B.
Improper tunnel boring method
C.
Inadequate diaphragm wall toe-in
AnswerD.
Fault movement
Answer: Option C
Solution
Answer: Option C
Solution:
The collapse was due to inadequate diaphragm wall embedment into stiff clay, causing basal failure during excavation�a major geotechnical oversight.