A series of creep tests of high-density polyethylene uniaxial geogrids are performed under different environmental conditions
including the stress level
temperature
chemical reaction
installation damage and confined constraint in sand. The results show that: with the higher temperature or stress level
the creep of geogrid is bigger and the creep rate is faster; the creep critical stress level of uniaxial geogrid is unsuitable to exceed 40% under common conditions; chemical reaction can lead the creep deformation to increase about 10%; the influence of installation damage is obvious; the creep property under confined constraint in sand is related with the stress state of geogrid; the filling material and loading can reduce the creep deformation of geogrid greatly.