Drilling Service Techniques:

Drill Shafts

Also called caissons, drilled piles, drilled piers, Cast-in-drilled-hole piles (CIDH piles) or Cast-in-Situ piles, offers larger diameter piles than any other piling method and permit pile construction through particularly dense or hard strata.

Augercast Piles

AKA continuous flight auger piles (CFA). An auger is drilled into the ground in the desired depth, then slowly extracted, removing what is there while concrete or grout is replaced through the hollow stem, constructing a continuous pile without defects. The finished foundation element resists compressive, uplift and lateral loads. We use this technique to support buildings, tanks, towers and bridges.

H-Pile Shoring

AKA Soldier Pile Shoring consists of multiples piles spaced apart from each other to support a change of elevation. The piles are usually H beams installed in drilled shafts. Timber lagging is then installed between the H beams to restrain the soil between the piles. Deeper excavations may require tiebacks to be installed at the piles for additional soil support. Soldier Pile Shoring is very versatile because the size of the piles and the spacing between them can be adjusted to site soil conditions.

If you are in need of a drilling contractor in the Seattle, WA area, contact Pearson Drilling Inc. today for more information on our drilling services.