Pullout Behavior of the L-Shaped Anchorage of Geogrid Under Static and Cyclic Loading

Geogrid as a reinforcing element is used in various soil structures such as reinforced walls and slopes, soft soil fills, and base layers of railway and roads. Due to space restrictions, geogrid often cannot be implemented horizontally, and different shapes of anchors should be used, where the L-shaped form is very common. Additionally, the geogrids used in reinforced soil are exposed to cyclic surcharges, along with permanent loads during the operation period. Thus, the present study provides the results of pullout tests on sandy soilburied geogrid with L-shaped anchorage under static and cyclic pullout force in order to assess the effect of different factors such as load amplitude and the number of replicating loading. Based on the results, adding the amplitude of cyclic loading resulted in mobilizing more pullout force compared to static conditions and enhancing cumulative displacements along the geogrid specimen. Further, adding the number of replicating cyclic loading resulted in diminished pullout force related to the anchorage of geogrid and safety margin of the operating structure under the condition of displacement control.