In the demanding sectors of tunneling, ground engineering, and geotechnical reinforcement, challenges such as variable soil conditions and time-intensive construction processes are prevalent. SupAnchor®, Asia's leading manufacturer and exporter of self-drilling anchors, has introduced the T Thread Self-Drilling Hollow Anchor, a product designed to address these issues with efficiency and reliability. Engineered in compliance with the T International Standard, this hollow bar anchor offers a robust solution for diverse applications, from urban infrastructure to remote mining sites.
The T thread self-drilling hollow anchor is built on an innovative "3-in-1 principle," where the ribbed hollow steel bar functions simultaneously as a sacrificial drilling rod, injection tube, and reinforcing bar. This integrated approach enables drilling and grouting in a single operation, eliminating the need for separate casing systems and significantly cutting construction time, especially in unconsolidated or cohesive soils where traditional methods falter. Key to its performance is the optimized thread design, featuring left-hand or right-hand T threads compatible with standard rotary percussive equipment, ensuring seamless on-site installation.
Further enhancing its geotechnical reinforcement capabilities, the anchor's rib surfaces are angled at 45°, which reduces splitting forces on surrounding rock or soil, maintaining crack widths below 0.1 mm at maximum load for superior structural stability. The relative rib area (fR) is optimized between 0.21 and 0.33, maximizing bonding with grouting materials. To extend service life, SupAnchor provides multiple anti-corrosion options: hot-dip galvanizing for general environments, SupCoating (HDG + epoxy) for moderate conditions, and stainless steel for highly corrosive scenarios like coastal projects.
Below is a technical overview of key models, highlighting their adaptability:
| Model | Outside Diameter (mm) | Internal Diameter (mm) | Ultimate Load (kN) | Weight (kg/m) |
|---|---|---|---|---|
| T30/16 | 30 | 16 | ≥220 | 2.70 |
| T30/14 | 30 | 14 | ≥220-260 | ~2.8-3.0 |
| T30/11 | 30 | 11 | ≥260 | ~3.2-3.4 |
| T40/16 | 40 | 16 | ≥660 | 7.17 |
| T40/660 | 40 | 20 | ≥660 | ~6.8-7.0 |
This self drilling anchor system exemplifies how standardized compatibility with accessories like nuts and plates streamlines logistics, making it a preferred choice for drill-and-grout bolt applications worldwide.
The T thread self-drilling hollow anchor is versatile, finding widespread use in critical areas such as tunneling engineering for face support and forepoling, slope stabilization to mitigate landslides in highway slopes or mining waste piles, and foundation reinforcement in soft soil to enhance load-bearing capacity. Its efficiency makes it suitable for both permanent projects like bridge foundations and temporary shoring in construction sites, depending on anti-corrosion selection.
In the broader context of global infrastructure, this geotechnical reinforcement system contributes to safety and sustainability by reducing construction timelines and improving durability. From mining operations to urban development, the hollow bar anchor supports large-scale projects that demand reliable anchoring in challenging environments, thereby boosting economic growth and environmental resilience.
As a leader in the self-drilling anchor bolt market, SupAnchor emphasizes continuous R&D, innovation, and adherence to international certifications like ISO standards. The company's commitment to professionalism is reflected in products like the T thread anchor, which have been deployed in diverse global projects, from European tunneling initiatives to American geotechnical reinforcements. By fostering collaboration with engineering teams and clients, SupAnchor ensures that its solutions are not only technically advanced but also tailored to meet evolving industry needs.
With the launch of this advanced self drilling anchor system, SupAnchor reinforces its message of being professional, innovative, and collaborative, driving forward the future of geotechnical engineering with reliable and efficient solutions that set new benchmarks in the industry.
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