INTERPRETATION OF INSTALLATION DAMAGE OF GEOGRIDS BY CONSIDERING ENVIRONMENTAL CONDITIONS

초록

We have compared the long-term performance of membrane drawn-type, warp/knitted-type, junction bonded-type, composite-type geogrid, and strip-type geosynthetic reinforcement from their total factor of safety calculated from the composite reduction factors. To evaluate these reduction factors, wide-width tensile measurements, installation damage, creep deformation, and chemical and biological degradation tests were performed. The total factor of safety for the geosynthetic reinforcements was calculated from the experimental results of these reduction factors. The long-term design strength of the geosynthetic reinforcements was calculated using equations contained in the Geosynthetic Research Institute Standard Test Method GG4. The reduction factor by creep deformation was determined to affect the long-term performance. Strip-type reinforcements and composite-type geogrids showed excellent long-term performance among the geosynthetic reinforcements studied.