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Question

The intensity of passive earth pressure at a depth of 5 m in a cohesion less soil with an angle of internal friction of 30 when water rises to ground level is kN/m2. Take saturated unit weight of sand as 21kN/m3and γw=9.81kN/m3.


  1. 216.9

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Solution

The correct option is A 216.9

Coefficient of passive earth pressure,
kP=1+sinϕ1sinϕ=1+sin301sin30=3
Intensity of passive earth pressure,
Pp=kpγh+γwh
=kp(γsatγw)h+γwh
=3×(219.81)×5+9.81×5
=216.9kN/m2


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