APPLICATIONS OF GEOGRID Highway and railroad, can reduce the subsiding difference of roadbed and bridgehead,low the vibration of the vechile and the roadbed,slow the roadbed structure distortation,guarantee the security comfort. Joining the geogrid in the backfill soil,can increase the shear strength and the whole character in middle terms,reduce the middle term filling quantity,makes the sofe base teatment more convenient,low the construction cost. Used in the earthen dam section design,make the geogrids be as the muscle structure.can improve the bearing distortatino performance of the dam.avoid the breaking.