water coming out the floor

Hello all, I have been lurking on this site on and off for a few years now, so once I ran into a problem, I immediately came here. I just bought a house that is slab on grade, and when the water was turned on, the floor became wet. We traced it to the picture posted. We actually had to pull up...

We want to use a curtain for a stall shower. That stall corner shower with 2 sides opened has 2 in height from inside I tried to do several things to prevent water coming out the floor such as glue some quarters coin to weigh down a curtain. Put diy splash guards. I just think about to change a...