The present invention discloses a support assembly using a thumb pile and a soil barrier construction method using the same. A support assembly using the disclosed thumb pile includes a plurality of support members disposed to be buried in the ground while maintaining a predetermined distance; And a plurality of steel plates disposed between the two support members to block soil and moisture flowing from the ground, wherein the support member includes a first flange and a second flange positioned parallel to each other, the first and A web disposed between the second flange, and a guide part disposed between the first flange and the second flange to block moisture flowing from the ground while strengthening the bonding force between the steel plate and the support member. A plurality of guide holes are formed at intervals, and a fixing screw is disposed on the guide part so as to correspond to the guide hole, and the guide part moves along the guide hole according to the adjustment of the fixing screw, and the steel plate is moved to the support member It is characterized by fixing. A support assembly using a thumb pile according to the present invention and a soil barrier construction method using the same, there is an effect of reinforcing the support force against the earth pressure applied from the ground by arranging a steel plate and an auxiliary support between the thumb piles.
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