1
GATE CE 2023 Set 1
MCQ (Single Correct Answer)
+1
-0.33
A group of 9 friction piles are arranged in a square grid maintaining equal spacing in all directions. Each pile is of diameter 300 mm and length 7 m. Assume that the soil is cohesionless with effective friction angle 𝜙′ = 32°. What is the center-to-center spacing of the piles (in m) for the pile group efficiency of 60%?
A
0.582
B
0.486
C
0.391
D
0.677
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