GATE Civil Engineering (CE) 2018 Shift 1 Solved Paper

Question : 50 of 65

Marks: +1, -0

At a construction site, a contractor plans to make an excavation as shown in the figure.

The water level in the adjacent river is at an elevation of

+20.0 {m} .

Unit weight of water is

10 {kN} \/ {m}^{3}

. The factor of safety (up to two decimal places) against sand boiling for the proposed excavation is

Solution:

{FOS}=\;{10 × γ_{ {sat}}}/{20 × γ_{ {w}}}=\;{10 × 20}/{20 × 10}=1

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