Self drilling anchors (SDA) are perfect for unstable ground conditions because they are a special type of rod anchors. It may be used in gravel, sand, clays, soft to medium fracture rock formations, and silt. This is because SDAs work well with difficult soil conditions and limited access. Therefore, you can benefit from extra corrosion protection, decreased material cost, and high installation rate.

SDAs are applied to underpinnings, earth retention, new construction, tunneling, settlement, and stabilization.

Self drilling anchor consists of a hexagonal nut, a bearing plate, extension couplings, a sacrificial drill bit, and hollow anchor rod.

The productivity of installing a self drilling anchor relies heavily on the sacrificial drill bit. Unlike other drill bits, the ones that come with SDA must meet several criteria. One it should be of high-quality, have enough length (proportionate to the anchor), and meet geology and geometry requirements.