Geotechnical engineering firm, S&ME, was awarded a 2019 Grand Conceptor award from the American Council of Engineering Companies (ACEC) for their Surcharge Program at the new Novo Nordisk Diabetes Active Pharmaceutical Ingredient (DAPI) Project in Clayton, North Carolina. The original foundation design concept at the $2 billion (USD) facility included a combination of deep foundation elements and ground improvement. S&ME evaluated the previous geotechnical design and provided a new field and laboratory investigation program to design the surcharging program, which included an instrumented monitoring program. The program resulted in the elimination of 4,600 piles, saving the project over $14 million in construction costs.
A massive sinkhole more than 300-ft in diameter and with depths to bedrock of up to 350-ft is located under a future I-4 traffic interchange in an Orlando suburb. A massive $9 million stabilization project is underway to prepare the site for the eventual TI construction. The size of the Maitland Sinkhole is on par with the largest sinkholes to form in central Florida in recent times. There is not a void present, instead it is infilled with a compressible sand deposit. (Image from FDOT)
The mitigation method includes drilling over 300 grout injection holes, and performing grouting operations to infill cracks in the limestone bedrock. Then in the same holes, compaction grouting will be used as a method of ground improvement to densify the sand in place. Once the grouting is complete, the site will be surcharged to compress any remaining weak layers. Click through for a subsurface profile and location map. Via ASCE SmartBrief.