construction structures for prevent groundwater pollution and maintaining the groundwater wall

摘要

According to an aspect of the present invention, there is provided an air conditioner comprising: an outer casing inserted into a ground water hole formed on a ground surface, An inner casing inserted into the outer casing and inserted more deeply than a lower end of the outer casing; And a contamination preventing portion provided on a lower outer circumferential surface of the inner casing so as to open into an empty first space between the outer casing and the inner casing, wherein the upper portion of the first space is filled with gravel and sand, So that the inflow of pollutants into the ground water hole is prevented from being externally blown when curing is completed.