Q123
Which geotechnical challenge occurred during the construction of the Chunnel (Channel Tunnel)?
A.
Permafrost
B.
Fault zone water ingress
AnswerC.
Marine sediment liquefaction
D.
Fault scarp uplift
Answer: Option B
Solution
Answer: Option B
Solution:
The TBMs encountered water ingress through fault zones in chalk marl, requiring sealing and advanced dewatering systems.