Tampoonimine väldib põhjavee reostamist maapinnalt torutagust pidi allavalguva veega ning vee pääsemist kaevu neist põhjaveekihtidest, mille vett ei soovita võtta.
The purpose of grouting is to provide a low permeability seal in the annular space between the casing and the borehole wall. ... Grouting is normally performed using cement, bentonite clay, or a combination of the two.
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