For a submerged backfill, the active earth pressure is given by _________

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What will be the coefficient of earth pressure at rest for a rigid retaining wall, If the backfill consists of cohesion less soil having φ = 26°?

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A backfill of a retaining wall consists of γ=19 kN/m^3 which is 6 m high. Find the lateral earth pressure per meter length. Given coefficient of earth pressure at rest is 0.5.

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