We provided an on-board geotechnical peer review of design for a series of earth hills to be constructed on filled portions of Governors Island in New York Harbor. Our peer review focused upon critical review of slope stability, ground improvement, load reduction and constructability.
The Solutions Unearthed
- Our peer review recommended an enhanced characterization of the subsurface conditions which included over 100 feet of stratified soils including fill, organic deposits, sands and glacial lake clays.
- We recommended an advanced program of direct simple shear testing consistent with the SHANSEP approach to developing soil strengths of the clay for slope stability analysis.
- We recommended modeling of the conditions and solutions with finite element analysis to enhance understanding of the soil-structure interaction and strain compatibility of natural and man-made materials in the embankments and the subsurface.
- The review resulted in design changes and facilitated identification of cost economies and management of risks associated with soil loading from the landscaped fills.
Client: The LiRo Group