Multiple choice

An unsupported excavation is made to the maximum possible depth in a clay soil having ^_yt= 18 kN/m³, c = 100 kN/m³, ^$psi$= 30^o. The active earth pressure, according to Rankine’s theory, at the base level of the excavation is

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An unsupported excavation is made to the maximum possible depth in a clay soil having yt= 18 kN/m3, c = 100 kN/m3, $psi$= 30o. The active earth pressure, according to Rankine’s theory, at the base level of the excavation is