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Clusters of small-diameter boreholes equipped with heat exchangers made of plastic PEX pipe can be used to store heat or cold between opposing seasons in a mass of native rock. The technique is called seasonal thermal energy storage. Media that can be used for this technique ranges from gravel to bedrock.
Typically it is built by burying a continuous coil of high-density polyethylene (HDPE) or cross linked polyethylene (PEX) pipe in the ground. The pipe can be buried in excavated trenches 4' to 10' (1.3 to 3 m) deep, inserted into horizontal or vertical boreholes, or laid in the bottom of a pond, lake or the ocean.
A post in ground construction, also called earthfast [1] or hole-set posts, is a type of construction in which vertical, roof-bearing timbers, called posts, are in direct contact with the ground. They may be placed into excavated postholes , [ 2 ] driven into the ground, or on sills which are set on the ground without a foundation.
One reason is that many cemeteries require a vault or liner for graves. That helps keep the ground from settling to make it easier to mow and maintain the cemetery.
One of the traditional house types in China is the Yaodong, a cave house. Also, see the Nok and Mamproug Cave Dwellings in Togo, Africa. Earth berm structures are essentially traditional homes that have then been buried, [10] typically leaving at least one wall exposed for lighting and ventilation. However, because they are to be buried, the ...
The first hole is dug on one side of the obstacle. This hole must be large enough to fit the tool and allow the operator to aim it. The hole also must be deep enough so that, as the tool compacts the ground, the surface remains undisturbed. The depth of the starting bore pit depends on the type of soil being worked in and how well it compacts.
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