Abstract: Current test standards for the tensile properties of geogrid are systematically compared, and problems in tensile test on warp knitted geogrid are summarized. Variations of tensile properties induced by the change of initial fixture distance, tensile rate, and fixture protected by liner or not are investigated through experimental study on the tensile properties of warp knitted geogrid. The results obtained could explain the problems in tensile properties tests.

Key words: CHEN Ying, CHEN Wen-liang, SUN Cong-yan