Fine sands persisting to depths ranging from 12 to 16 feet below grade, followed by limestone with fine sand to the maximum termination depth of the exploration borings at 70 feet below grade; groundwater table at depths ranging from 3.9 to 6 feet below grade
Deep soil mixing columns with 8 feet diameter installed at depths of up to 28 feet and 234 augercast piles with 18 inch-diameter installed to depths of 67 feet.
Nicholson was awarded the contract to build the basement and foundation structure for a new facility in Miami, Florida designed to treat cancer patients with proton beam technology. Nicholson's foundation solution included the use of Deep Soil Mixing (DSM) and Augercast Piles (ACP). The DSM was used to construct a temporary, cantilevered gravity block wall and bottom plug system to allow for up to 25 feet deep excavation depth. In addition 234, 18 inch ACPs were installed at depths of up to six feet. Once the DSM and ACP work was completed, Nicholson self-performed the excavation of the pit.