Abstract: In the geogrids reinforced soil structure field test, availably convert the measure strain to tensile stress is very important. This can help to analyze the mechanism of action accurately. Through the indoor tests, the tensile properties of three HDPE geogrids with different strain rates are studied in this paper. It is concluded that the tensile strength and tensile modulus will decrease with the decrease of tensile rate; and the peak strain decreases with the decrease of the tensile rate. The strain rate will have smaller influence on the higher strength geogrids. In the specifical tensile rate, The tensile strength corresponding to 2%, 5%, 10% and peak strain increase in turn, the tensile modulus reducing in turn.

Key words: geogrids, tensile properties, indoor test, strength, modulus