Thanks for posting back

If this is a surface water issue with clay soil, I'd be inclined to install some curtain drains to catch and carry away most of the water before it can get under the pool and push the liner around.

A well point requires that the water puddling under the pool can quickly/ easily reach it.

I wrote a post last year (elsewhere ) on designing a curtain drain system - I can copy it for you or just let you tell me the shape and slope of your yard and get back to you in a week or so (my 25th HS reunion is this weekend and I'll be off the boards for a few days - heading up to Al's territory, Pa. - Pottstown to be precise)

If it's just surface water and you can redirect it away from the pool, the floating liner issue should stop.