GATE Civil Engineering (CE) 2020 Shift 1 Solved Paper

Question : 42 of 65

Marks: +1, -0

Water flows in the upward direction in a tank through

2.5 {m}

thick sand layer as shown in the figure. The void ratio and specific gravity of sand are

0.58

and

2.7

, respectively. The sand is fully saturated. Unit weight of water is

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

The effective stress (in kPa, round off to two decimal places) at point A, located 1 m above the base of tank, is

Solution:

Taking 2 as datum

x+0+1=4.22

x=3.22

i=\;{h c}/{c}=\;{1.2}/{2.5}=.48

\ov{σ}_{A}=σ-u

\ov{σ}_{A}=8.925 {kw} {/} {m}^{3}

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