Sinking pilings down to bedrock would solve (prevented in this case) the problem but the issue for the developers since the beginning is the cost.
If the developers have no option other than to sink pilings to the bedrock, they'll instead declare bankruptcy and walk away because they'll never recoup those costs. The city of San Francisco would become the owner which means taxpayers would be forced to bail them out.
—”Sinking pilings down to bedrock would solve “
THAT IS THE CURRENT PROJECT, with offset piles all the way down to bedrock.
No bankruptcy, yet.
But Mr. Hamburger may run off to Mexico?