Yes. In a Self-Drilling Anchor (SDA) system, the drill bit is typically designed as a sacrificial drill bit, meaning it remains permanently in the ground after drilling and grouting.
The drill bit is attached to the hollow threaded anchor bar during installation and performs the drilling function through the soil or rock. Once the required drilling depth is reached, grout is injected through the hollow center of the anchor bar to fill the borehole and bond the anchor system to the surrounding ground.
Because the drill bit is left in place, there is no need to retrieve it or remove the drilling equipment from the borehole. This makes SDA systems particularly suitable for unstable, fractured, or difficult ground conditions where conventional drilling methods may experience borehole collapse.
The type and design of the sacrificial drill bit should be selected according to the ground conditions, drilling method, and required drilling performance.
