A major hydropower station slope stabilization project has successfully deployed SupAnchor’s Grade 75 self-drilling hollow anchor bars to address complex geological challenges. The project, located in a region with fractured rock and high groundwater, required a geotechnical reinforcement system that could provide immediate support while maintaining long-term durability. SupAnchor’s solution—a drill-and-grout bolt system combining drilling, anchoring, and grouting in a single operation—was chosen for its proven performance in similar environments.
The Grade 75 hollow bar anchor is designed and manufactured in accordance with ASTM A615 standards, making it a reliable alternative to solid threaded bars in demanding conditions. Its continuous T-thread design offers a larger rib area compared to standard threads, significantly improving bond strength with grout and surrounding soil. This feature is particularly advantageous in slope stabilization and tunneling, where load transfer efficiency is critical.
To meet the specific demands of the hydropower project, SupAnchor provided bars with the following mechanical properties:
| Parameter | Value |
|---|---|
| Yield Load | 147 kN (33 kips) |
| Ultimate Load | 196 kN (44 kips) |
| Elongation | ≥ 6% |
| Weight | 2.6 kg/m (1.75 lbs/ft) |
| Thread Orientation | Left-hand thread |
These parameters allowed the self drilling anchor system to be installed quickly even in collapsing ground conditions. The hollow bar design enables simultaneous drilling and grouting, reducing installation time by up to 30% compared to conventional methods. The left-hand thread ensures compatibility with standard drilling equipment, while the bar’s relatively high rib area enhances load transfer, making it ideal for soil nail system applications and ground anchor bolt installations.
Beyond hydropower slope stabilization, SupAnchor’s Grade 75 hollow bar anchor is suitable for a wide range of geotechnical reinforcement systems. Common applications include:
The growing demand for efficient and reliable geotechnical solutions worldwide has driven adoption of drill-and-grout bolts like SupAnchor’s. Infrastructure projects in North America and Europe increasingly specify self drilling anchor systems to reduce risk and speed construction schedules. The Grade 75 bar’s compatibility with existing R and T thread products simplifies logistics and inventory management for contractors.
SupAnchor has established itself as a leading soil nail system manufacturer and ground anchor bolt factory, with a portfolio of over 300 global projects. The company holds ISO 9001 certification and invests heavily in R&D to optimize thread designs and material properties. Collaborative engineering support is a hallmark of the brand—SupAnchor works closely with geotechnical engineers to customize solutions for challenging ground conditions.
In the hydropower project, SupAnchor’s team provided on-site technical guidance and rapid delivery of 12-meter bars, ensuring the stabilization work stayed ahead of schedule. Project managers reported a 20% reduction in overall anchoring costs compared to traditional solid bar systems, thanks to faster installation and less waste.
As global investment in infrastructure and renewable energy continues to rise, the need for advanced geotechnical reinforcement systems will only grow. SupAnchor’s Grade 75 self-drilling hollow anchor bars exemplify the combination of innovation, quality, and cost-effectiveness that engineers require. With its professional support and continuous product development, SupAnchor remains a trusted partner for geotechnical challenges worldwide.
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