Not a lot.
There was a concrete block (an NZ ‘pile’) which magic-post hovered an inch or so over. So, I thought the job was going to be fairly easier – I would just reuse the pile and stick in a new post that fitted.
Turtles all the way down
A well-known scientist … described how the earth orbits around the sun and how the sun, in turn, orbits around the center of a vast collection of stars called our galaxy.
At the end of the lecture, a little old lady at the back of the room got up and said: “What you have told us is rubbish. The world is really a flat plate supported on the back of a giant tortoise.” The scientist gave a superior smile before replying, “What is the tortoise standing on?” “You’re very clever, young man, very clever,” said the old lady. “But it’s turtles all the way down!”Stephen Hawking (1988). A Brief History of Time.
I was a little curious to know what the concrete block was on (and so on), and I have a new spade.
So down I dug.
I found the block was lounging around in the mud. So it was a little Dr Suess: Fox on clocks on bricks and blocks. Bricks and blocks on Knox on box. None of it doing a lot.
Some notes on (Top) Soil
In the world of soil engineers, top soil is:
Surficial organic soil layer that may contain living matter.
Good for plants, bad for foundations.
Anyway, out came the block, and down my digging went. Eventually, I did hit the good stuff (or good ground) and so made an unnecessarily 3D scan of it using Autodesk Recap Photo to celebrate.
The 3D scan of hole
I find this amazing – that you can do it: just take a few photos and you get a 3D model. Searching for a purpose for it, I used it to work out how many bags of concrete I needed (115L, or 6x 20kg bags for a 350mm deep pad).
I was so chuffed how spot-on the concrete estimation was that I also made a video too.