First time being asked to design precast concrete lagging panel for a permanent soldier beam & lagging retaining wall.
Span between soldier beams is 8' (so length of concrete lagging would be a little less than that, but call it 8' span for simplicity). Typical detail from state's bridge design...
Have been asked to design soldier beam for permanent cantilever wall (exposed height ~6').
Borings show silty-sand (report provides Phi = 29 deg, unit weight 125 PCF). Borings show there is fractured shale beneath the soil, but I would like to design the wall as if it was encountering only soil...
