3 ms·

Very interesting. Thanks for sharing. You make a good point that it’s not so simple as just drilling to bedrock.

• pas 5y ago
  It's not that complicated though. There's nothing stopping the builders to get the bad column out and try it again. And again. Yes it's expensive as fuck, but this is still the foundation we're talking about. This (and the load bearing core) is where cost must come after safety. Yes, naturally safety needs to be quantified and that just gets us back to cost again in a sense, but that's why there's a minimal safety codified (in the building code). It's all about cost. There are many ways to get those nice columns in the ground, it's possible to drill them and put annular rings on top of each other (just like with regular wells) then fill it with concrete. More expensive than the bentonite slurry method? Sure, but it's still simple.