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Yes, bundle them into a 2x2 configuration and weld them into place. Also get some nice thick steel plates and weld them to the joints as gussets/fins to provide lateral stability.
Then get the lot powder coated and finally fill the tubes with sand and old engine oil to dampen vibration.
Dig a hole 400x400x600 as your footing and you will have a niceness sturdy pier.
Bo
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