Examveda

In the Gotthard Base Tunnel, what major geological obstacle was encountered?

A. Aquifers in limestone

B. High geothermal gradients

C. Weak unconsolidated sand

D. Reactive clay minerals

Answer: Option B

Solution (By Examveda Team)

The Gotthard Base Tunnel in Switzerland, the world�s longest rail tunnel, faced high geothermal gradients exceeding 40�C, requiring special cooling and ventilation systems.

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