Featured Project Return to Projects List
1 Seaport Residences - jet grouting/anchors for ground improvement
Project Information
- Project Location:
- New York, NY
- Status:
- Completed
- Structure Type:
- Residential Building
References
- Client:
- Fortis Property Group
Scope Of Work
Seaport Residences was the first high-rise building in Manhattan constructed on a structural mat supported by ground improvement.
A 57-story high-rise building was to be constructed on a small parcel of land (approx. 5,000 sq. ft.) in lower Manhattan. The original foundation design of the Maiden Lane high-rise consisted of caissons drilled into bedrock found at significant depths. This solution was not only expensive, but difficult to construct given the tight site logistics.
HBI developed budget pricing for the caissons, but also suggested an alternative foundation concept that offered cost and schedule savings. HBI proposed using overlapping jet grout columns to solidify the loose/soft upper soils and shed the building loads into the dense sands below. Tiedown anchors installed through the jet grout mass and socketed into the rock below resisted uplift loads.
Detailed engineering analysis necessitated use of Plaxis 3D modeling software. HBI provided input with regards to design and constructability of the solution. Extensive QA/QC was performed during construction to validate soilcrete properties.
