Stop in for a cup of coffee

I have a backyard buddy free standing four post hoist. I never thickened the concrete,and yes,the floor cracked. In the first month. No change since. 5”thick maybe.
But cracks extend out from the corners of the floor drain,should have thickened it to bottom of drain.

So if floor is cut,and dug out deeper,what is used for cement?
Is extra steel added?

I should have added a couple 2x2” reciever tubes for tools.
Toolpost sockets are handy.