Which technique was used in the Brenner Base Tunnel to reduce tunnel collapse risks?
A. Fly ash backfilling
B. Shield tunneling
C. Pilot tunnel + umbrella arch
D. Freeze tunneling
Answer: Option C
Solution (By Examveda Team)
A pilot tunnel and umbrella arch method was used in the Brenner Base Tunnel to stabilize weak ground and reduce risks during excavation in fractured rock masses.This Question Belongs to Geological Engineering >> Case Studies And Applied Geological Engineering Projects
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C. Landslide into reservoir
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