What if they offloaded the containers from the front 1/3 or so and then used a high volume water pump and hose to blast the sand from below the bow?
I think that the combination of making the front lighter and dispersing the sand would make it feasible to tug out.
Just my Sunday thought while reading into the Suez situation.
They could use the traditional style drudge, which scoops up below itself, to clear out the blasted away sand.