Foundation structural design with cells configured to redirect and distribute stress loads
A structural design of a foundation that is configured to reduce size, fabrication time, material usage and installation time by prefabricated machine produced structural cellular and/or volumetric design that distributes and redirects stress loads from the above over extended exterior surface contact areas of a below grade embedded foundation.
1 . A prefabricated load bearing structural assembly comprising:
a pole having a first bottom section and a second section of the pole disposed above the first section;
a cap having inner vertical walls and outer vertical walls; and
a foundation having a pole cavity therein that is sized to receive the first bottom section of the pole therein, the cap being sized to fill a gap between an outer surface of the pole and an inner surface of the pole cavity, the foundation is unitarily fabricated with vertical internal cellular walls configured to transfer lateral and axial stresses away from the pole through the cap, wherein
the first bottom section of a pole rests on a centrally located structure at a bottom of the pole cavity,
the inner vertical walls of the cap abut a perimeter of the second section of the pole,
the outer vertical walls of the cap abut inner walls of the pole cavity,
cells of the vertical internal cellular walls of the foundation are arranged in a clockwise and counterclockwise radiating curved pattern about a vertical axial center of the foundation, the vertical internal cellular walls intersect and diverge from one another as well as extend outwardly toward a surface of the pole cavity such that at least a portion of stresses applied by the pole are distributed by the vertical internal cellular walls over extended exterior surface areas of the foundation, and the extended exterior surface areas of the foundation receive stresses applied by the pole so as to reduce counter pressure imparted by surrounding medium to maintain the foundation in equilibrium.
2 . The prefabricated load bearing structural assembly of claim 1 , wherein the vertical internal cellular walls each include a through opening sized to permit a fluid flow from at least one cell to an adjacent cell.
3 . The prefabricated load bearing structural assembly of claim 1 , wherein at least one wall of the vertical internal cellular walls spirals about a vertical axis of the foundation from a top of the pole cavity downward.
4 . The prefabricated load bearing structural assembly of claim 1 , further comprising a threaded bolt that extends horizontally from at least one exterior side of the pole cavity through the cap and beyond at least one wall of the pole so as to secure the pole and the cap to the foundation.
5 . The prefabricated load bearing structural assembly of claim 1 , wherein a thickness of an exterior wall of the foundation and/or the vertical internal cellular walls varies.
6 . The prefabricated load bearing structural assembly of claim 1 , wherein walls of the pole cavity taper inward toward the vertical axial center of the foundation from grade level upwardly.
7 . A prefabricated load bearing structural assembly comprising:
a foundation having a pole cavity therein; and
a pole having a first bottom section and a second section disposed above the first section, the first bottom section is sized to fit within the pole cavity, wherein
the foundation is unitarily fabricated with vertical internal cellular walls configured to transfer lateral and axial stresses applied by the pole to the foundation,
the first bottom section of a pole rests on a centrally located structure at a bottom of the pole cavity,
the second section of the pole having a perimeter that abuts a wall of the pole cavity,
cells in the vertical internal cellular walls are arranged in a clockwise and counterclockwise radiating curved pattern about a vertical axial center of the foundation, the vertical internal cellular walls intersect and diverge from one another as well as extend outwardly toward a surface of the pole cavity such that at least a portion of stresses applied by the pole are distributed by the vertical internal cellular walls over extended exterior surface areas of the foundation, and the extended exterior surface areas of the foundation receive stresses applied by the pole so as to reduce counter pressure imparted by surrounding medium to maintain the foundation in equilibrium.
8 . The prefabricated load bearing structural assembly of claim 7 , wherein the pole is secured to the foundation by a bolt that extends through at least one wall of the pole.
9 . The prefabricated load bearing structural assembly of claim 7 , wherein a volume of voids of the cells in the vertical internal cellular walls constitute at least 5% of an overall volume of the foundation.
10 . The prefabricated load bearing structural assembly of claim 7 , wherein a weight of the cellular foundation is at least 5% less than another foundation of same size, shape and material as the foundation but without the cells.
11 . The prefabricated load bearing structural assembly of claim 7 , wherein the vertical internal cellular walls include a through opening sized to permit a fluid flow from at least one cell to an adjacent cell.
12 . The prefabricated load bearing structural assembly of claim 7 , wherein a thickness of an exterior wall of the foundation and/or the vertical cellular walls varies.
13 . The prefabricated load bearing structural assembly of claim 7 , wherein walls of the pole cavity taper inward toward the vertical axial center of the foundation from grade level upwardly.
14 . A prefabricated load bearing structural foundation comprising:
interior and exterior foundation walls with a plurality of vertical internal cellular walls therebetween, wherein
the foundation is unitarily fabricated with the plurality of internal cellular walls configured to transfer and redistribute lateral and axial stresses applied from above by a pole having a first bottom section that is disposed in a pole cavity of the foundation and that rests on a centrally located structure at a bottom of the pole cavity, a second section of the pole that is disposed above the first section abuts a pole cap or at least one wall of the pole cavity,
at least a portion of stresses applied by the pole are conveyed directly or through the pole cap to an inner wall of the pole cavity,
cells of the vertical internal cellular walls of the pole cavity are arranged in clockwise and counterclockwise radiating curved pattern about a vertical axial center of the foundation, the vertical internal cellular walls intersect and diverge from one another as well as extend outwardly toward an exterior wall of the pole cavity,
walls of the plurality of vertical internal cellular wall collectively spiral about the central axis of the foundation from a top of the pole cavity downward such that at least a portion of stresses applied by the pole are distributed by the vertical internal cellular walls over extended exterior surface areas of the foundation, and
the extended exterior surface areas of the foundation receive stresses applied by the pole so as to reduce counter pressure imparted by the surrounding medium to maintain the foundation in equilibrium.
15 . The prefabricated load bearing structural assembly of claim 14 , further comprising a threaded bolt that is horizontally disposed and secures at least one of the pole and the cap to the foundation.
16 . The prefabricated load bearing structural assembly of claim 14 , wherein an exterior wall of the pole cavity that is in proximity to grade level tapers inward toward a central vertical axis of the foundation.
17 . The prefabricated load bearing structural assembly of claim 14 , wherein at least one vertical internal cellular cell wall spirals about the central axis of the foundation from a top of the pole cavity downward.
18 . The prefabricated load bearing structural assembly of claim 14 , wherein a through opening is located inside each the vertical internal cellular walls to provide for at least one of fluid passage between adjacent cells and an electrical conductor connectivity.
19 . The prefabricated load bearing structural assembly of claim 14 , further comprising the pole cap, the pole cap
conveys at least a portion of lateral loads of the pole to at least one of the vertical internal cellular walls, and
at least partially covers the pole cavity.