As global infrastructure projects confront increasingly complex geological conditions, the need for reliable ground reinforcement systems has never been greater. SupAnchor, recognized as Asia's leading self drilling anchor system manufacturer, has introduced the SupUTS series—a new line of high-capacity self-drilling hollow anchors engineered to deliver exceptional tensile strength and installation efficiency in challenging ground. The series is designed for deep foundations, heavy-duty tunnel support, and large-scale slope stabilization where conventional anchors may not meet load requirements.
The SupUTS self drilling anchor bolt integrates three critical functions into a single ribbed hollow steel bar. It acts as a sacrificial drilling rod during installation, an injection tube for grouting, and a permanent load-bearing reinforcement element. This 3-in-1 design eliminates the need for separate casing and injection equipment, significantly reducing construction time and risk—especially in unconsolidated, cohesive, or unstable soils where traditional step-by-step drilling is inefficient and hazardous.
Engineers working on demanding projects often face the challenge of achieving high load capacity without compromising installation speed. The SupUTS series addresses this by using high-strength steel grades that meet EN10083-3 and EN10025 standards, with ultimate tensile strengths ranging from 360 kN to 930 kN depending on the model. This enhanced load-bearing capacity positions the SupUTS as a specialized geotechnical reinforcement system suited to applications where standard anchors are insufficient.
The SupUTS series is available in three primary models: SSTR32/360, SSTR38/660, and SSTR51/930. Each model designation indicates the nominal outside diameter in millimeters and the minimum ultimate load in kilonewtons. The table below summarizes key technical parameters.
| Model | Outside Diameter (mm) | Ultimate Load (kN) | Yield Load (kN) | Weight (kg/m) | Anchor Plate Size (mm) |
|---|---|---|---|---|---|
| SSTR32/360 | 32 | ≥360 | ≥280 | 3.5–4.0 | 200 x 200 x 12 |
| SSTR38/660 | 38 | ≥660 | ≥520 | 6.3–6.8 | 250 x 250 x 16 |
| SSTR51/930 | 51 | ≥930 | ≥730 | 9.0–9.5 | 300 x 300 x 20 |
All SupUTS models feature a standardized thread profile that ensures compatibility with SupAnchor's accessory system, including anchor nuts and couplers. The ribbed surface of the hollow bar is optimized with a relative rib area between 0.21 and 0.33, which maximizes the bond strength with cementitious grout. The 45-degree angled rib geometry reduces splitting forces on the surrounding ground, keeping crack widths below 0.1 mm even under maximum load. This design detail is critical for maintaining structural integrity in sensitive geotechnical environments.
Material elongation properties meet stringent requirements: A100mm is at least 6%, Agt at least 5%, and A200mm at least 6%. These values confirm the ductility necessary to absorb dynamic loads and prevent sudden failure. Standard lengths for the SupUTS series are available from 2 meters to 8 meters, with the largest SSTR51/930 model offered up to 6 meters due to handling weight considerations.
Long-term durability is a key concern for anchoring systems exposed to aggressive environments. SupAnchor offers three primary anti-corrosion treatments for the SupUTS series, allowing engineers to match the protection level to the project conditions.
This flexibility in corrosion protection extends the service life of the hollow bar anchor and reduces maintenance costs over the project lifecycle. For permanent ground anchor installations in water conservancy, port terminals, or coastal defense structures, the combination of high-strength steel and stainless steel or SupCoating treatment offers a robust solution.
The high load capacity and efficient installation of the SupUTS series make it suitable for a wide range of heavy-duty applications. In deep foundation reinforcement for high-rise buildings, the SSTR51/930 model can transfer significant tensile loads without requiring excessively large boreholes. Large-span bridge abutments and industrial structures with high load demands also benefit from the series' predictable performance.
In challenging ground conditions, the self drilling anchor system excels where traditional drilling and casing methods are prone to collapse. Deep slope stabilization, soft or cohesive soil reinforcement for highway interchanges and railway embankments, and deep tunnel excavation support are all scenarios where the SupUTS can reduce construction time and improve safety. The drill-and-grout bolt concept allows installation in a single pass, minimizing disturbance to the surrounding ground.
For permanent support in water conservancy projects, port terminals, and coastal defense structures, the SupUTS series paired with stainless steel or SupCoating corrosion protection ensures decades of reliable service. The standardized accessory system, including SW46, SW55, and SW65 series nuts and D42, D50, and D60 series couplers, simplifies on-site logistics and reduces installation errors.
SupAnchor has built a reputation as a leading soil nail system manufacturer and ground anchor bolt factory, with a strong focus on research and development. The company holds ISO 9001, ISO 14001, and ISO 45001 certifications, reflecting its commitment to quality management, environmental stewardship, and occupational health and safety. Its products have been deployed in major infrastructure projects across Europe, North America, and Asia, consistently meeting international standards such as EN 14490 and ASTM A615.
The SupUTS series is the latest result of SupAnchor's engineering expertise. By listening to the needs of geotechnical contractors and consultants, the company continues to refine its self drilling anchor system to deliver higher performance without sacrificing ease of use. The 3-in-1 design philosophy—drilling, grouting, and reinforcing in one operation—has become a hallmark of modern ground engineering, and the SupUTS extends this concept into the high-load segment.
As infrastructure demands grow in complexity, the availability of reliable geotechnical reinforcement systems such as the SupUTS hollow bar anchor becomes essential. Contractors and engineers seeking a high-capacity, corrosion-resistant, and installation-friendly anchoring solution will find the SupUTS series a compelling option for their most challenging projects.
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