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A post-hole auger. An earth auger, earth drill, or post-hole auger is a drilling tool used for making holes in the ground. [1] It typically consists of a rotating vertical metal rod or pipe with one or more blades attached at the lower end, that cut or scrape the soil.
Hollow stem auger drilling uses a large, hollow auger that removes soil as it drills. Auger drilling is often quieter and less vibration-prone than other drilling methods, like drive drilling, so it can also be used in urban areas. When using an auger, it's important to take safety precautions, such as wearing protective equipment like gloves ...
The drilling waste is spread on the land and incorporated into the upper soil zone (typically upper 6–8 inches of soil) to enhance hydrocarbon volatization and biodegradation. The land is managed so that the soil system can degrade, transport, and assimilate the waste constituents. Each land treatment site is generally used only once.
Before boring machines were invented, carpenters used hand-powered augers to bore holes. Most common were T-handled augers. The shape of the drill bits changed over time, with the spoon bit and shell bit being common before the invention of the spiral or twist bit in 1771 [1] which removes the cuttings as it turns.
The world's largest hard rock TBM, known as Martina, was built by Herrenknecht AG. Its excavation diameter was 15.62 m (51.2 ft), total length 130 m (430 ft); excavation area of 192 m 2 (2,070 sq ft), thrust value 39,485 t, total weight 4,500 tons, total installed capacity 18 MW. Its yearly energy consumption was about 62 GWh.
A post hole clam-shell digger, also called post hole pincer or simply post hole digger, is a tool consisting of two articulated shovel-like blades, forming an incomplete hollow cylinder about a foot long and a few inches wide, with two long handles that can put the blades in an "open" (parallel) position or a "closed" (convergent) position.
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