Examveda

Which material posed a hazard during construction of the Laerdal Tunnel in Norway?

A. Ice lenses

B. Water-bearing clay

C. Swelling phyllite

D. Peat

Answer: Option C

Solution (By Examveda Team)

The Laerdal Tunnel passed through zones of swelling phyllite, which expanded upon water absorption, causing pressure on tunnel linings.

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