Site:
New Mixed-Use High-Rise Building in Downtown
San Francisco

Problem:
For this soon-to-be constructed high-rise office/residential building in downtown San Francisco, the main frame of the building was to be supported on piles, but the soils were determined to be liquefiable to about 35 feet below street level.

Solution:
To abate this problem, soil densification using compaction grouting techniques were employed. The whole site was grouted using a grid of five-foot spacing for the injections.