If only. I misaligned the gate on my palisade a while ago (made the gap one square too wide, and had to build an entirely new cornerpost to solve it. The alternative was get a pickaxe (this was before the update where it was made even tougher), and it wasn't long enough after the reset so I didn't have access to a pickaxe
I wouldn't bother with the battering ram, I'd probably just leave the piece of palisade there, it'd decay after a week or two.