What Really Happened at the Millennium Tower?
A video on YouTube. In Science & Engineering, a Krater category.
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This video examines the engineering failure of the Millennium Tower in San Francisco, which sank and tilted due to settlement issues in the old bay clay layer, and details the retrofitting project designed to fix the foundation.
From the video
Answers: Why is the Millennium Tower sinking and how are engineers fixing it?
- Millennium Tower settlement
- deep foundation systems
- friction piles
- soil consolidation
- geotechnical engineering
- foundation retrofitting
- hydraulic jacking
What it concludes
- The Millennium Tower sank 16 inches and tilted toward the northwest corner, doubling its anticipated lifetime settlement within a few years of construction.
- Comprehensive legal settlement required the condo owners to be compensated and the building to be fixed through foundation retrofits.
- The retrofit design installs 52 new perimeter piles tied to the building with hydraulic jacks to transfer weight to the bedrock and halt settlement.
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