GEODesign was the lead geotechnical engineer for the evaluation of the existing foundations and the design of possible additional supplemental foundations. In addition, GEODesign evaluated the use of cofferdams at the three pier locations so that the contractor could perform concrete pier rehabilitation work in the dry.
The Solutions Unearthed
- Designed and managed a subsurface exploration program which included water borings with soil and rock sampling and laboratory testing to estimate the soil and rock strength parameters.
- Developed soil profiles and 3-D models of the existing foundations to calculate foundation stiffness parameters, which were used by the structural engineer for the superstructure evaluation.
- Developed conceptual foundation retrofit options that included driven piles and large diameter drilled shafts.
- Performed cofferdam analyses and cost estimates for the concrete pier rehabilitation.
Client: New Jersey Turnpike Authority (NJTA) | Parsons