Examveda

Which geotechnical challenge occurred during the construction of the Chunnel (Channel Tunnel)?

A. Permafrost

B. Fault zone water ingress

C. Marine sediment liquefaction

D. Fault scarp uplift

Answer: Option B

Solution (By Examveda Team)

The TBMs encountered water ingress through fault zones in chalk marl, requiring sealing and advanced dewatering systems.

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