Moving sand is easier than moving a ship+20K containers or removing the 20K containers in hopes of refloating the ship.
So the easiest solution would be to widen the canal at this point - where the ship is currently located and where the ship will need to go as it refloats and turns. Move the banks further back. In effect create a place with enough room for a ship of this size to turnaround.
The canal isn't that deep. Dredgers can be brought on both banks in front and behind the ship. Four dredging teams ought to knock this out pretty quickly.
So the easiest solution would be to widen the canal at this point - where the ship is currently located and where the ship will need to go as it refloats and turns. Move the banks further back. In effect create a place with enough room for a ship of this size to turnaround.
The canal isn't that deep. Dredgers can be brought on both banks in front and behind the ship. Four dredging teams ought to knock this out pretty quickly.