This project presented significant challenges due to the highly varied subsurface conditions. In order to avoid excessive settlement of a shallow organic stratum and a 40 foot thick silt/clay layer, deep foundations bearing on bedrock were recommended. The rock depth also varied by as much as 50 feet across the site, which required the use of several SOE systems and different pile types.
The Solutions Unearthed
- Performed value engineering to change driven piles to CFA piles bearing on rock. Designed and inspected multiple pile load tests to confirm compression and lateral pile capacities. Inspected the installation of over 500 CFA piles.
- Designed and inspected drilled caissons and rock anchors to resist tension loads.
- Designed and inspected an SOE system that included sheet piles, driven and drilled soldier piles, supported by cantilever, rakers, and tiebacks.
Client: L&M Development Partners, Inc.