Q91
In the Gotthard Base Tunnel, what was the major geotechnical concern?
A.
Gas explosions
B.
Glacial till
C.
Water ingress through fractured rock
AnswerD.
Weak soil layers
Answer: Option C
Solution
Answer: Option C
Solution:
The Gotthard Base Tunnel encountered significant water ingress through fractured gneiss and schist, requiring high-capacity dewatering systems and grouting.