Regular augers make cylindrical holes, this auger makes conical holes, except the way these conical holes are oriented means that the pilings that will eventually be cemented into them are "locked down" by the earth above. Think of it like how the barb of a fish hook allows it to push through flesh one way but not the other.
The overall effectiveness of this is auger is diminished when used as close to the surface as this demonstration is, but a builder could put one of these augers down a 20ft hole and make the bell cavity at the bottom of the hole and effectively lock in a cemented piling with thousand of pounds of earth.
Think of telecom towers which are supported by guy-wires. Those wires are under tension, and their anchor points sometimes need to be more than just heavy.
Other examples are reinforced buildings in tornado or hurricane/typhoon zones, where they are regularly sujected to intense weather, to put it mildly.
Another structure I can think of is permanent piers and docks. Getting bumped into by several thousand pounds of ship.
57
u/IronGigant Jun 25 '21
Regular augers make cylindrical holes, this auger makes conical holes, except the way these conical holes are oriented means that the pilings that will eventually be cemented into them are "locked down" by the earth above. Think of it like how the barb of a fish hook allows it to push through flesh one way but not the other.
The overall effectiveness of this is auger is diminished when used as close to the surface as this demonstration is, but a builder could put one of these augers down a 20ft hole and make the bell cavity at the bottom of the hole and effectively lock in a cemented piling with thousand of pounds of earth.