I'm curious if someone could explain to me the railroad live load interaction of a railroad abutment sitting on drilled shaft piles that are part of a drilled shaft retaining wall whose tracks intersect the wall at a 90 degree angle. Rather than the tracks running parallel to this retaining wall, they are crossing over it so that the wall and the tracks are perpendicular to one another. I was wondering if someone could explain to me how to convert the railroad live loading (UPRR cooper E-80) into a surcharge to be distributed behind the wall if the abutment is sitting on top of a portion of this wall.
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