Q33
What method was primarily used to stabilize tunnel portals in the Konkan Railway project?
A.
Grouting
B.
Rock bolting and shotcrete
AnswerC.
Timber lagging
D.
Excavation through rockfill
Answer: Option B
Solution
Answer: Option B
Solution:
In the Konkan Railway project, many tunnel portals were stabilized using rock bolting and shotcrete to deal with weak lateritic soils and rainfall-induced instability.