In geotechnical engineering, the most effective solutions are often the ones that simplify complexity. The hollow anchor bar is a prime example—serving as the core of self-drilling anchor systems, it enables fast, reliable ground reinforcement in even the most unstable conditions. Whether you're working in fractured rock, loose soil, or water-bearing strata, this component delivers strength where it matters most.
A hollow anchor bar is a steel tube with external threads, designed to function as both the drill rod and the structural anchor. It connects to a sacrificial drill bit at the front and a bearing plate and nut at the surface. During installation, grout is pumped through the hollow core, filling the borehole and bonding the bar to the surrounding ground.
Integrated Functionality: Combines drilling, grouting, and anchoring in one step
Grout Injection Capability: Hollow core ensures uniform grout distribution
Thread Profiles: Available in R-thread (round) and T-thread (trapezoidal) options
Modular Design: Extendable with couplers for deeper anchoring
Corrosion Protection: Optional galvanization or epoxy coating for long-term durability
Rapid Installation: Eliminates the need for pre-drilling or casing
High Load Capacity: Grouted anchors provide excellent bond strength
Adaptable: Performs in soft soils, fractured rock, or mixed ground
Cost-Effective: Reduces labor, equipment, and project timelines
Reliable Performance: Proven in tunneling, mining, slope stabilization, and foundation works
Tunnel face stabilization
Slope and embankment reinforcement
Soil nailing and retaining walls
Foundation underpinning and micropiles
Mining drift and shaft support
Ground improvement and seismic retrofitting
: Offers a wide range of hollow anchor bars with R and T thread options, engineered for secure foundations in challenging conditions
: Asia’s leading exporter of self-drilling anchor bars, with over 30 years of experience and global reach in more than 70 countries
: Supplies ISO-compatible hollow anchor bars with excellent mechanical performance, suitable for pre-support, micropiling, and slope anchorage
The hollow anchor bar is more than a component—it’s a strategic enabler of fast, safe, and reliable ground reinforcement. With its ability to simplify installation and perform in complex geological conditions, it continues to be a trusted solution for engineers building the foundations of tomorrow.