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Hand auger - general

1 byte removed, 04:42, 22 September 2013

→‎Suitable conditions

==Suitable conditions==

[[Image:Auger drilling in temporary casing1.jpg|thumb|right|250px200px| Auger drilling in temporary casing]]

Augers can be used up to a depth of about 15-25 meters, depending on the geology.

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! width="50%" style="background:#efefef;" | Advantages

! style="background:#ffdeadf0f8ff;" | Disadvantages

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| valign="top" | - Easy to use above the groundwater table

- The borehole does not stay open if a collapsing sand layer is encountered below a clay layer (through which the temporary casing could not penetrate).

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==Construction, operations and maintenance==

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