Strength and Durability of Backfill Geogrids for Retaining Walls

摘要

The objectives of this study are to evaluate and resolve, through an experimentaland analytical investigation, some of the concerns related to long-term performance of geogrids by determining (1) the pullout resistance of HDPE and PET geogrids in sand and limerock, under dry and saturated conditions, and (2) the creep, creep rupture, and durability characteristics of HDPE and PET geogrids exposed to accelerated testing, with super-ambient temperatures for different simulated exposure conditions, and soil water related to the soil conditions in Florida. This will enable cost-effective applications of geogrids, compared to steel reinforcement, which enable the maximum utilization of public funds in Florida's transportation industry. The performance indicators would be changes in design standards.