Examveda

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

D. Fault movement

Answer: Option C

Solution (By Examveda Team)

The collapse was due to inadequate diaphragm wall embedment into stiff clay, causing basal failure during excavation�a major geotechnical oversight.

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