Destruction business

Today I continued with removing the palisades, an activity Teba pointed at yesterday.
We have three rows of palisades, securing the slope and creating a larger "flat" area in our garden.
Together there are 50 palisades. At least the bottom row, but I assume all three rows are set on concrete foundation, and in addition kept in place by 50 cm of concrete. I will only remove the 50 cm, not the foundation underneath.
The recently acquired drill hammer has been used a lot already, I couldn't do without it.
The palisades are heavy, I can't just pull them out of the concrete, I really have to demolish the concrete first.
(And I don't want it to burst into too small pieces, too much work to get it out of the hole. Larger chunks is better.)