In order to figure out the difference of reinforcement effect between high-density polyethylene(HDPE) geogrids and polyethylene terephthalate(PET) geogrids in fill embankment with wrapped face

based on tensile tests of two geogrids

this paper analyzes the force-deflection characteristics of two different geogrids-reinforced embankment by means of FLAC3D and some in-situ tested data. The results show that the mechanical properties of geogrids have an obvious influence on the displacement of reinforced embankment; and the influence is related to its overlying earth pressure. In the middle and lower part of the embankment

because of the higher earth pressure value

there exists a relatively huge variance in strain value of HDPE geogrids along its length

and the variance of strain value of PET geogrids is within a narrow range; in the upper part of the embankment

the less earth pressure value leads to the lower strain value of geogrids and there is no various strain difference between the two types of geogrids. PET geogrids are better than HDPE geogrids in the effect of controlling displacement of the reinforced embankment. The distribution of vertical and horizontal earth pressures has less difference between PET and HDPE reinforced embankment.