Absolutely. While I did not let them cement over any pipes at our place, I have seen it before and then a jack hammer event to get to a leak. Also here in Thailand for whatever reason they never dig the trenches deep enough and pipes always surface which leaves them exposed to damage.
Hope they plan on a bit of clean up on the pipe mess there DW. I have seen spaghetti messes like that here and I just sort of laugh shaking my head.