The mind boggles! (About the unusual planting site.)

Be prepared to dig quite deeply as tulips often start forming the new bulb deeper down on the present root system. (They're more like Oxalis and Freesias in that they put down a 'dropper root' plus a fringe of feeder roots rather than the spread of roots you see with a daffodil. Odd things go on under the soil!)

If you can dig up the clump with minimal disturbance, and can leave the tulips to finish off their growing season naturally, then they'll probably come back again.

Just be sure that the place you move them to has good drainage and give them the usual '$50 hole for a $5 plant' treatment. (Big enough widthways and depthways to take the big scoop of earth plus tulips you'll be bringing across to plant.)