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For the 8m high retaining wall, the top layer is sand with internal friction angle Ø=25°...

For the 8m high retaining wall, the top layer is sand with internal friction angle Ø=25° and unit weight is 18.2 kN/m3 and the bottom layer is gravel with internal friction angle Ø=33° and unit weight is 21.8 kN/m3 . There is no cohesion in both of the soil layers. Calculate the thrust per meter length of the wall Pa and draw the lateral earth pressure diagram.

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