I am designing a gravity retaining wall for a state DOT using the AASHTO bridge design specifications. The wall will use large segmental blocks with a wall batter. I am calculating Ka using the batter of the back of the wall in the Coulomb equation. The reviewer says that I have to calculate Ka...
You may want to check out "Earth Pressure on Retaining Walls near Rock Faces" in the Journal of Geotechnical Engineering Vol. 113, No. 6, pages 586-599.