Q10
What was the major geological issue in the Chunnel (Channel Tunnel) project?
A.
Water ingress in chalk marl
AnswerB.
Rockburst
C.
Thermal cracking
D.
Fault slip zones
Answer: Option A
Solution
Answer: Option A
Solution:
The Channel Tunnel passed through chalk marl, which presented groundwater control issues. Pressurized TBMs and sealing techniques were used to handle water ingress.