Q173
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
AnswerD.
Freeze tunneling
Answer: Option C
Solution
Answer: Option C
Solution:
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.