Q78
Which of the following techniques is primarily used to improve ground stability around tunnels?
A.
Core drilling
B.
Grouting
AnswerC.
Dewatering
D.
Scaling
Answer: Option B
Solution
Answer: Option B
Solution:
Grouting involves injecting cementitious or chemical material into the ground.The correct answer is: GroutingIt fills fractures, reduces permeability, and strengthens rock mass.Essential near water-bearing or loose zones.