In the 1950’s, {the electrical} energy trade began to make use of power-driven helical screw anchors for tension loads to 36,000 pounds of man anchorage for towers and utility poles worldwide. The first use of these anchors was to resist pressure or guy loads.
In the 1960’s, the usage of helical screw anchors was prolonged by {the electrical} energy industry for guy anchorage of transmission towers with loads exceeding a hundred,000 pounds. Engineers were beginning to discover other functions of helical screw anchors, together with foundations. It grew to become obvious that helical screw anchors may resist compression loads as well as pressure loads.
Within the 1970’s, helical screw anchors grew to become the popular technique for guying electrical transmission towers and utility poles. Load capability relationship began to be acknowledged as a serious advantage of helical piles.
Within the 1990’s, helical piles turned an accepted method of providing deep foundations. Purposes include, however are usually not restricted to, basis retrofits, new construction, marine moorings, boardwalks, department of transportation tasks, and as tiebacks for every type of earth retention systems.
At present, the use of helical piles includes short-term and everlasting earth retaining systems (tieback anchors), underpinning programs for buildings topic to settlement, pipeline helps, buoyancy management for underwater pipe strains, equipment mounts, street gentle foundations, and new development tasks with soil conditions that typically would not allow suitable capacities.
