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Geological Engineering · Q123

Case Studies and Applied Geological Engineering Projects

Engineering and GATE · Geological Engineering · question 123

Q123

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

A.
Permafrost
B.
Fault zone water ingress
Answer
C.
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.