Slab movement

[akpingel]

I've got an unusual shop in that the structure is old but the location is relatively new. I think the slab would have been poured around 2007. Anyway I noticed one corner is moving, essentially sinking in the corner at the edge of the shop and rising in the opposite corner of the slab (each square is about 15 by 15 and the shop is 30 by 50). I caulked this seam with the light gray caulk in the spring. I highlighted it with the red marks hopefully that's visible. So it's moved in the last several months and I'm wondering what might be causing this... water issues outside, tree roots (several big trees near) or something else like normal settling. Am I dealing with a major problem? Any thing I can do to slow or remediate this issue? The foundation has a fresh crack as well but it doesn't seem to have moved as much.
Thanks!

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[lakeroadster]

Just keep water away from the building. Post up some exterior photo's of the garage.

You could always have a crew come in and mudjack it back into place, but if the sub-grade is getting wet it will likely sink again after the mudjacking.

I had an attached garage slab at our previous home that did this. The garage was "high and dry" in regard to the lay of the land around it but I'd drive my pickup in the garage in the winter and many times the bed was full of snow. It would warm up and melt. The water would go into the saw cut control joints that were cut into the concrete and that water would freeze and lift the slab. Sealing the control joints seemed to fix the issue.