Micropiles

DYWI^® Drill Hollow Bar Micropiles can be installed in restricted access areas or within the close proximity of buildings. Due to the fully threaded system, the micropile can be extended and grouted in areas where the founding level is deeper than expected.

The rotary percussive drilling method ensures minimal disturbance is caused during installation compared to driven piling systems, enabling the foundations of old structures or buildings to be upgraded without damage. Pile stiffness can be increased by placing a steel tube over the top 2m of bar and grouting the annulus.

Applications for DYWI^® Drill injection piles, in accordance with EN 14199, include: retained facade bases, foundation upgrades, pylon bases, wind turbines, refurbishment of old structures and gantry bases for rail electrification. Larger diameter DYWI^® Drill bars can be used to form contiguous piled retaining walls.

1. Shotcrete or Structural Concrete
2. Flat Plate
3. Constructive Reinforcement
4. Pile Neck Reinforcement
5. Coupling
6. Drill Bit
7. Hexagonal Nut
8. Lock Nut
9. Hollow Bar
10. Centralizer
11. Grout Body