On 1/11/14 6:53 PM, Mark Robinson wrote:
A ham in Florida (which has a high water table) just had a big hole dug
for his tower. The company used what is called a well point. It is
defined here
http://dictionary.reference.com/browse/well-point
Another strategy used on large excavations is to pump liquid nitrogen
into the soil and create a frozen barrier to water infiltration.
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