DYWI® Drill Hollow Bar System
DYWI® Drill Injection Piles consist of a micropile (or minipile) bar that can be both drilled and injected with grout during installation. The fully threaded rod sections can be cut and coupled at any point, enabling quick and easy installation in areas of restricted access or limited headroom.
Installation of DYWI® Drill Injection Piles causes minimal disturbance to surrounding structures. The system also enables additional rod sections to be added in-situ, for pile extension in poor ground where the depth of the bearing strata is unknown.
Simultaneous drilling and grouting ensures that the grout is continuously placed over the full depth of the micropile, enabling grout to permeate the surrounding ground and increase skin friction. Rotary percussive installation ensures high rates of production and provides good directional stability if obstructions are encountered.
Applications for DYWI® Drill Injection Piles include but are not limited to: column bases, foundation upgrades, mast stabilisation, refurbishment of old structures, and gantry bases for overhead power lines on electric rail projects.