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All posturing by politicians aside, it's been well-known for decades that you can't load Florida soil with that kind of weight since there's no bedrock under it. And it's also been noted by some engineers and other interested parties that this building was in trouble, years ago.
Any public statements of surprise from the mayor or the governor or even the president, about this catastrophe are just gaslighting, or maybe worse, indications of dumbfuckery.
You realize you don't have to drive pilons down to bed rock, right? The geologist or civil engineer can legally declare that firm competitent ground has been reached based upon the hammer blow count it takes to drive the pilon 1 mm. All the civils I have worked with want to be extra cautious doing that though so even though the law requires say five consecutive counts exceeding the engineer's specification we would usually demand 10 consecutive counts just to be extra sure. None of our projects have failed in the last 20 years so I guess we have done well.
I'd imagine, not being an engineer myself, that "firm competent ground" might stop being available once you reach the water table. What can you tell us about the water table in south Florida, or the entire Gulf Coast for that matter?
I have never worked in Florida or the gulf coast so I can't speak to that. You can indeed get firm competent ground below the water table as the measurement is usually how hard it is to hammer a pilon a given distance deeper into ground. One area which might cause problems is that water fills void spaces between the sediments so if someone over pumps ground water that void space opens up. That could cause for.erly firm competent ground to no longer be so. Another issue could be salt water intrusion and its effects on pilons.
One of my first jobs out of college was on a job site in Long Beach, CA right on the waterfront next to the Queen Mary. It was counting hammer blow counts as they drove pilons into the sand so they could build a new waterfront shopping and dinning area over the shore line. Talk about boring as hell.