In the demanding world of geotechnical engineering, where unstable soils, deep excavations, and heavy structural loads pose constant challenges, the introduction of a new high-capacity anchor system can redefine project feasibility. SupAnchor, a leading manufacturer and exporter of self-drilling anchors in Asia, has unveiled its latest innovation: the SupUTS self-drilling hollow anchor. This advanced geotechnical reinforcement system is engineered to deliver superior tensile and yield strengths, making it a critical solution for projects that require enhanced load-bearing capacity and long-term reliability.
The SupUTS series builds on SupAnchor’s proven 3-in-1 integration principle, where a single ribbed hollow steel bar acts as a drilling rod, grouting tube, and permanent reinforcement. This self drilling anchor bolt eliminates the need for separate casing and injection equipment, drastically reducing construction time and risk in unstable ground conditions. With the SupUTS, SupAnchor targets high-load applications such as deep foundation reinforcement for skyscrapers, heavy-duty tunnel support, and large-scale slope stabilization where conventional anchors fall short.
The “UTS” in SupUTS stands for “Ultimate Tensile Strength,” a clear indicator of the series’ performance leap. Available in three core models — SSTR32/360, SSTR38/660, and SSTR51/930 — the anchors offer ultimate loads ranging from 360 kN to 930 kN, significantly higher than standard self-drilling anchors of similar diameters. This is achieved through high-strength steel grades conforming to international standards such as EN10083-3 and EN10025, ensuring consistent elongation and ductility with A100mm ≥6% and Agt ≥5%.
Key technical specifications for the SupUTS series are summarized in the table below:
| Parameter | SSTR32/360 | SSTR38/660 | SSTR51/930 |
|---|---|---|---|
| Outside Diameter (mm) | 32 | 38 | 51 |
| Ultimate Load (kN) | ≥360 | ≥660 | ≥930 |
| Yield Load (kN) | ≥280 | ≥520 | ≥730 |
| Weight (kg/m) | 3.5-4.0 | 6.3-6.8 | 9.0-9.5 |
| Anchor Plate Size (mm) | 200 x 200 x 12 | 250 x 250 x 16 | 300 x 300 x 20 |
The ribbed profile of the hollow bar anchor is optimized to maximize bonding with grouting materials, with a relative rib area (fR) similar to the T thread series’ 0.21-0.33. The 45° angled ribs reduce splitting forces on the surrounding soil or rock, keeping crack widths below 0.1 mm even at maximum load. This ensures structural integrity and long-term performance in both soil and rock applications.
One of the standout features of the SupUTS series is its versatile anti-corrosion strategy, which extends service life across varying climatic and chemical conditions. Engineers can select from three protection levels:
This flexibility makes the SupUTS a truly global solution, from inland infrastructure in Europe to coastal defenses in the Americas and beyond.
The SupUTS self drilling anchor system is designed for projects where failure is not an option. Typical applications include:
“Our clients in Europe and North America are increasingly demanding anchors that not only simplify construction but also meet stringent long-term safety standards,” said a SupAnchor senior engineer. “The SupUTS series is our answer to that call, combining our 3-in-1 efficiency with extreme load capacity and customizable anti-corrosion.”
Installation efficiency is further enhanced by the standardized thread design, which ensures full compatibility with SupAnchor’s range of coupling systems. The SSTR32/360 uses an anchor nut from the SW46 series and a coupler from the D42 series; the SSTR38/660 pairs with SW55 nuts and D50 couplers; and the SSTR51/930 employs SW65 nuts and D60 couplers. This modularity allows contractors to source all components from a single, reliable ground anchor bolt factory, simplifying supply chains and ensuring quality consistency.
Globally, infrastructure investment is surging, with projects like high-speed rail networks, urban metro expansions, and renewable energy foundations requiring robust ground reinforcement systems. The SupUTS hollow bar anchor addresses a critical gap: it provides a single, reliable, drill-and-grout bolt that can handle loads that previously required more complex and time-consuming multi-stage anchoring processes. This streamlines logistics, reduces equipment needs, and cuts project timelines — all while enhancing safety.
For mining applications, the quick installation and immediate load-bearing capacity of the SupUTS improve underground safety by minimizing crew exposure to unsupported ground. In tunneling, the ability to drill, grout, and reinforce in one pass accelerates advance rates, a key metric for project economics. As a soil nail system manufacturer, SupAnchor has optimized the rib design and steel grade to ensure every anchor performs predictably under design loads. As infrastructure ages in developed nations and new megaprojects emerge in developing regions, the demand for high-capacity, easy-to-install reinforcement systems grows. The SupUTS self drilling anchor system meets this need by combining drilling, grouting, and anchoring into a single pass, thereby reducing labor costs and environmental impact.
As Asia’s top self-drilling anchor manufacturer, SupAnchor has supplied geotechnical reinforcement systems to over 50 countries, earning certifications such as ISO 9001, ISO 14001, and OHSAS 18001. The company’s R&D continuously refines thread standards, steel chemistry, and production processes to meet the evolving needs of ground anchor bolt factories and contractors worldwide.
“We collaborate closely with engineering firms and contractors to understand their site-specific challenges,” the engineer added. “The SupUTS is a direct result of that feedback — a product that integrates seamlessly into our existing ecosystem of accessories, from coupling nuts to bearing plates, while pushing the performance envelope.”
With the launch of the SupUTS series, SupAnchor reaffirms its mission to provide professional, innovative, and collaborative geotechnical solutions. Whether it’s a deep excavation in downtown Manhattan, a coastal wind farm in the North Sea, or a rail tunnel through the Alps, the SupUTS self-drilling anchor system stands ready to secure the world’s most challenging ground.
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