In the realm of geotechnical engineering, projects like deep tunnel excavations, high-rise foundations, and large-scale slope stabilizations often grapple with complex soil conditions and heavy structural loads. SupAnchor®, recognized as the leading manufacturer and exporter of self-drilling anchors in Asia, has introduced the Grade 75 self-drilling hollow anchor to address these challenges. This high-strength variant builds on the company's established "3-in-1 principle," integrating drilling, grouting, and reinforcement into a single system to optimize construction efficiency and reliability for European and American infrastructure markets.
The Grade 75 self-drilling hollow anchor is engineered to meet rigorous demands in geotechnical reinforcement systems. Utilizing a ribbed hollow steel bar of Grade 75 high-strength material, this drill-and-grout bolt allows for simultaneous drilling and grouting, eliminating the need for separate casing and reducing installation time in unconsolidated or cohesive soils. Key parameters, inferred from SupAnchor's product line logic, highlight its superior performance:
| Parameter | R32 Model (Inferred) | R38 Model (Inferred) |
|---|---|---|
| Outside Diameter (mm) | 32 | 38 |
| Ultimate Load (kN) | ≥380-420 | ≥550-600 |
| Yield Load (kN) | ≥300-340 | ≥440-480 |
| Cross-Sectional Area (mm²) | 400-450 | 600-650 |
| Thread Type | ISO 10208 - R32 | ISO 10208 - R38 |
| Elongation (%) | A100mm ≥6% | A100mm ≥6% |
This self drilling anchor system solves engineering challenges by offering significantly higher tensile and yield strengths compared to standard grades, such as the R32N/20 model with ultimate loads of ≥280 kN. The optimized rib design, with a relative rib area of 0.21-0.33 and 45° angled surfaces, enhances bonding with grout and minimizes soil disturbance, ensuring crack widths below 0.1 mm under maximum load. Compatibility with anti-corrosion treatments like hot-dip galvanizing allows adaptation to damp or corrosive environments, making it a versatile hollow bar anchor for diverse applications.
The Grade 75 anchor is tailored for heavy-duty projects where standard anchors fall short. Its application scenarios include:
This geotechnical reinforcement system contributes to global infrastructure development by enhancing safety in tunneling, mining, and construction sectors. By reducing labor intensity and construction delays through quick on-site connections, it aligns with industry trends toward efficiency and sustainability. SupAnchor's innovation in this self drilling anchor bolt reflects a commitment to addressing geotechnical risks in growing urban and industrial landscapes.
SupAnchor's R&D efforts, backed by ISO certifications such as ISO 10208 for thread standards, underscore its role as a professional and innovative leader in the ground anchor bolt market. The company's global projects, from Asian export hubs to European and American collaborations, demonstrate the adaptability of its product portfolio. The Grade 75 series, complementing variants like stainless steel and standard R/T thread anchors, showcases a collaborative approach to meeting diverse engineering needs. SupAnchor emphasizes a brand message of professionalism, innovation, and partnership, ensuring that this drill-and-grout bolt integrates seamlessly into complex projects while upholding structural integrity.
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