Q50
In the Olmos Trans-Andean tunnel project, what was a key geological issue?
A.
High geothermal gradients
B.
Permafrost
C.
Weak phyllite and fault zones
AnswerD.
Karst voids
Answer: Option C
Solution
Answer: Option C
Solution:
The tunnel passed through the Andes, encountering phyllite and crushed fault zones, which required ground support and drainage strategies.