Underground base for a static structure

An underground base configured for supporting an above-ground static structure, the underground base comprising:

• a plurality of plates each having a distal end, a proximal end, and a body portion between the distal end and the proximal end, each of the plurality of plates connected to at least another plate of the plurality of plates such that the plurality of plates defines a three-dimensional structure having an open top end and an open bottom end;
• a plurality of brackets each connected to one of the plurality of pile plates;
• at least one stabilizing bracket connected at a joint between adjacent plates of the plurality of plates and extending radially outward relative to the body portion of the plates;
• and
• at least one reinforcement plate connected to the body portion of at least one of the plurality of plates,
• wherein each of the plurality of plates is made from a first material,
• wherein the at least one reinforcement plate is made from a second material different from the first material,
• wherein the distal end of each of the plurality of plates tapers inwardly from an outer surface of the body portion toward an inner surface of the body portion to define a first taper, and
• wherein the distal end of the at least one reinforcement plate tapers outwardly from an inner surface toward an outer surface of the at least one reinforcement plate to define a second taper.