Yes—if the Soligor lens is an M42 screw-mount lens, it can be adapted to a Canon EOS Rebel T3i with a simple M42-to-Canon EOS adapter. An adapter with an AF-confirm chip may be helpful, but the lens will still be manual focus and manual aperture control.

If the lens is actually M39 instead of M42, adapting it properly is much less practical because it typically requires optical correction in the adapter, which is generally not recommended.

So the key step is to confirm the mount type first. If it is M42, adaptation is straightforward. If it is M39, it is usually not worth doing.

Also, as a general note, older manual-focus zooms tend to be less impressive than vintage prime lenses, so image quality may not match modern zooms.