In total, Foundation's team installed 1,250 driven H-Piles at at an average of 260 feet deep

The Project:

The team worked with the three general contractors and a geotechnical engineer for two to three years before NTP to refine the design, including the pile type, quantities, depths, and lengths on four separate sites.  This early preconstruction work involved troubleshooting potential challenges and developing mitigation efforts.  Early collaborative efforts included running dozens of pricing exercises with various quantities and steel to determine installation methods, duration, and pricing with the designers, ultimately cutting the budget from $50 million to $24 million.

  • 1,250 H-Piles
  • Multiple Pile Rig operations to meet the schedule
  • Foundation designed sound shrouds which dramatically reduced the hammer operation noise

Challenging Soil Conditions:

The project also involved pile driving through the undocumented fill, including debris, building material, and waste 5-75 feet below grade, due to the earthquake of 1906.  While these are less-than-ideal situations for pile driving, the team approached each pile flexibly and was willing to innovate and change tactics collaboratively.  The long lead time allowed the team to work with geotechnical and engineering firms to develop several mitigative approaches if an obstruction was encountered.  FCI’s solution-driven approach has allowed the team to remain on schedule for every parcel.

Innovative Techniques:

Foundation has been able to limit damaged pile costs on the first three parcels to less than 3 percent, significantly less than the anticipated approximately 9 percent thanks to Foundation’s willingness to reconsider hammer use, beam size, splice locations, relief drilling as needed, and new strategies to mitigate breakage.  This also led to increasing productivity and significant cost savings for the client.