What Kind Of Project Is This?
At some point, the man arrived inside carrying a bunch of wooden beams. Despite the fact that this made it abundantly clear that the holes in the structure were meant for the beams and that the man was working on constructing something, it was still extremely unclear what exactly this project entailed.
The man was getting ready to set the beams in place in the holes by pouring some cement on top of them before doing so. In the end, gravel rather than dirt would be used to fill in the holes that he had made. Instead of having the beams come into contact with wet dirt and run the risk of rotting, this would protect them and keep them dry.