Hollow Bar Micropiles
Hollow bar micropiles are small diameter bored, cast-in-place composite piles in which the applied loads are resisted by steel reinforcement, cement grout and frictional grout-to-ground bond. In most ways hollow bar micropiles are like traditional micropiles, but there are some key differences. The bar itself acts as the drill rod and is left in place as the reinforcement once drilling is complete. Grout is continuously injected through the hollow bar during the drilling operation; as such, the need for temporary casing is eliminated and significant cost and schedule savings are often possible.
Typical Applications for Hollow Bar Micropiles
Retrofit of Existing Structures