Slope Stabilization/
Earth Retention

Micropiles, grouted anchors, helical piles and helical anchors are a common and economical way to construct earth retention systems. 

Helical Tieback Or Grouted Anchor

Helical Tieback or grouted anchor walls typically consist of cast-in-place reinforced concrete walls, with spread footings and one or more rows of helical tiebacks or grouted anchors. They are often post tensioned, and generate pullout resistance past the active zone of the soil behind the wall. Grouted anchors or helical tiebacks are typically installed at a 10-15° angle from horizontal, but can be installed at steeper angles if required.

An important factor in building tieback walls is the downward component of force caused by the helical tiebacks or grouted anchors. (Each tieback results in a horizontal and vertical component of force in the retaining wall). They must be designed for the weight of the wall facing and downward component of force. As such, an analysis of anchor pullout, lateral earth pressures, overturning stability, sliding and bearing capacity must be undertaken prior to construction.