Helical piers (aka helical piles, screw piles and ground anchors) are screwed into the soil, instead of being buried or rammed in like concrete piers. Think of helical piers the way you compare ...

For instance, a study on helical soil-nailed walls (HSNWs ... Moreover, the load-transfer mechanisms of tensioned anchors, which are similar to soil nails, have been analyzed to develop a ...