Abstract: A clamshell underground base configured for supporting an above-ground static structure includes a pair of clamshell sections configured to removably connect to each other to define a pipe portion having an open top end, an open bottom end, and an opening extending therebetween. Each of the clamshell sections has a distal end, a proximal end, and a body portion between the distal end and the proximal end. At least one reinforcement plate is connected to the each of the clamshell sections and extends across the opening. Each of the clamshell sections is made from a first material, and the at least one reinforcement plate is made from a second material different from the first material. The first material is a fiber-reinforced polymer composite material, and the second material is steel.

Abstract: The invention relates to a terrapin for installing a pipe foundation and works by sandwiching soil for final pin placement. The terrapin is a system used to strengthen unconfined soil layers. The terrapin dramatically reduces the potential for project site disruption by creating a sandwich of the soil layers to strengthen the soil properties during pin placement and installing a casing.