Q84
Which material posed a hazard during construction of the Laerdal Tunnel in Norway?
A.
Ice lenses
B.
Water-bearing clay
C.
Swelling phyllite
AnswerD.
Peat
Answer: Option C
Solution
Answer: Option C
Solution:
The Laerdal Tunnel passed through zones of swelling phyllite, which expanded upon water absorption, causing pressure on tunnel linings.