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...
@PEinc,
Thank you for the detailed response, I see how those numbers make sense. In that case, I'd design for the assumption there is rock below the subgrade.
Using AASHTO (1996 Standard Spec. for Highway Bridges), there seem some options:
1. For a "highly fractured, moderately weathered...
Thanks HotRod10, I was suspecting that was the case... supposing I wanted to create a soil-only design (for myself at least), maybe assume a foreslope of 29 deg or slightly less?
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...
