They will need supporting. Usual method is posts with wires stretched between them, .then they are tied to the wires..
Or you could put posts each corner of your rows and wrap a wire round them, so you have boxed them in
You can sink some sort of sheeting down the side of them to stop them running .
maybe 2 foot deep, but one or 2 runners may find their way under this .
Raspberries like to roam :)
We crossed in post Sadad :) in our area they need spporting else they get blown to the ground