Q56
Which shaft sinking technique involves freezing water-bearing ground before excavation?
A.
Blind shaft boring
B.
Raise boring
C.
Artificial ground freezing
AnswerD.
Slurry wall method
Answer: Option C
Solution
Answer: Option C
Solution:
Artificial ground freezing stabilizes wet, loose ground during shaft sinking.The correct answer is: Artificial ground freezingCirculates chilled brine or nitrogen through pipes to freeze surrounding soil.Minimizes water inflow and supports excavation.