Method to Prevent Scour of Foundation and Embankment

In the present invention, the filling material such as sand, aggregate, stones, and concrete is filled in the geo-bag to prevent the ground surface from being lost by the cave, A plurality of geobacs can be installed simultaneously and quickly and easily in a scar occurrence occurrence area around the foundation by using a hanger to quickly and effectively block occurrence of scour phenomenon in the underwater ground surface in a short period of time The present invention relates to a method for preventing scouring of an underwater surface by installing a geoback using a hanger.