Quote:
Originally Posted by Malcsta
I was talking with a friend today about the viability of Winnipeg getting a 50 storey tower and he mentioned that the ground wouldnt support it. He mentioned that Winnipeg was basically situated on top of a giant swamp. Anyone able to corroborate this ?
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Anywhere from ~25-50 feet below existing grade is glacial till (super compressed gravel) and/or bedrock. Even if glacial till is there, if you keep digging you will hit rock at some point.
The difficulty in building foundations here is the depths involved, and dealing with the ground water when you are down there. But there aren't height limitations in Winnipeg - just $$ limitations.
All of the buildings you see that use the driven pre-cast concrete piles are designed to be supported directly on the glacial till level. That type of foundation can get you into mid-rise heights at most, before you need to upgrade to driven steel piles, and then finally cast-in-place caissons onto or into the bedrock.