Lower East Side, NY
Technico Construction Services
October 2019 - May 2020
- 17 each 8 5/8” minipiles drilled 93 ft average cased length and 10’ rock socket
- 34 each 13 3/8″ minipiles drilled 100 ft average cased length and 10’ rock socket
- 16 each 9 5/8” diameter Soldier Piles
- 11 each 42″ rock socketed caissons
- 2 each compression & lateral load tests
Superstorm Sandy left the lower East Side of Manhattan damaged and in need of better protection for building utilities and emergency units. Posillico was brought in to provide foundations for storm hardening of new buildings at the NYCHA Isaacs Houses. The scope of work included 13 3/8” diameter rock socketed mini caissons, 8 5/8” diameter rock socketed mini caissons and 42” diameter rock socketed caissons.
WHAT MADE THIS JOB COMPLEX
There were logistical challenges working within a NYC housing project since it was in close proximity to active building entrances. In addition, the performance specification of the 42” caissons could not be achieved as designed, in part due to numerous undocumented subsurface obstructions and required some revisions.
HOW POSILLICO SOLVED IT
Posillico implemented a strict safety protocol to handle the challenging proximity to active buildings and pedestrian walkways. The team also used specialized tooling to contain drill spoils and maintain pedestrian areas free of construction debris. Together, the Posillico Team and Engineering Team redesigned the foundations to a conventional drilled caisson with temporary casings extracted, which met the performance specifications and allowed the job to progress.