i-beams in soldier piles

huangyhg

i-beams in soldier piles
i'm trying to size the steel for a concrete soldier pile and was wondering how i model the beam when determining the point of zero shear.  i modeled it as a cantilever beam, with the very end of the pile embedded in bedrock considered fixed.  then i found the point of zero shear by summing the passive and active forces. i then took moments around that point, but only above that point to size the steel.  the building official who i talked to told me it was wrong to model it as a cantilever beam.  am i doing this right?  i'd be happy to provide any more info, thanks.  my reference by the way is the alternate design example in the caltrans soldier pile systems manual.