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Self-Drilling Anchors (SDAs)
Product Description
Self-Drilling Anchors (SDAs)
Self-Drilling Anchors (SDAs) are hollow-core rock bolts that serve as both drill equipment during hole excavation and reinforcement tendons once grouted into place.
In this system, a single-use drill bit, selected according to ground conditions, is attached to the leading end of the bolt, while a plate and nut are fitted on the trailing end. For deeper anchoring applications, couplers can be used to extend the bolt length.
Hollow Core Bolts (HC Bolts)
Hollow Core Bolts (HC Bolts) utilize the same hollow bar as SDAs but are supplied without a drill bit.
These bolts are placed into pre-drilled support holes, and resin or grout is injected through the hollow bar to complete the installation. This system is ideal for applications requiring conventional drilling rigs for hole excavation.
Key Features
Self-Drilling Anchors (SDAs):
✔ Combines Drilling and Anchoring in One Step – No need for separate drilling and anchoring processes.
✔ Suitable for Challenging Ground Conditions – Performs well in fractured rock, loose soils, and heterogeneous formations.
✔ Extendable System – Enables deeper anchoring with couplers.
Hollow Core Bolts (HC Bolts):
✔ Designed for Pre-Drilled Holes – Ideal for use with standard drilling equipment.
✔ Resin or Grout Injection – Ensures full bonding with the ground for high load-bearing capacity.
✔ High-Strength Hollow Bar System – Provides long-lasting support and reliability.
Applications
✔ Tunneling and Underground Structures – Ground and ceiling reinforcement in metro and road tunnels.
✔ Mining Industry – Roof and wall stabilization in underground excavations.
✔ Slope Stabilization – Rockfall prevention and erosion control.
✔ Ground Reinforcement – Provides structural support in weak soil conditions.
Why Choose Armosan SDA and HC Bolts?
✅ High Efficiency – Self-drilling anchors eliminate the need for separate drilling and anchoring, saving time.
✅ Versatile Use – Adapts to various ground types and project requirements.
✅ Durable and Long-Lasting – Manufactured with high-strength materials.
✅ Cost-Effective – Reduces equipment and labor costs.
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Self-Drilling Anchors, Hollow Core Bolts, Rock Bolts, Pumpable Resin, Grout Injection, Tunneling, Mining, Ground Reinforcement, Slope Stabilization.