In a major infrastructure project along the Baltic coast, contractors faced a daunting challenge: stabilizing deep foundation piles in water-saturated clay and sand layers while maintaining tight construction schedules. Traditional drilling with casing and separate grouting was slow and prone to collapse. The project team turned to SupAnchor, Asia's No.1 manufacturer and exporter of self drilling anchor systems, for a solution. The company's newly launched SupUTS high-strength self drilling hollow anchor series provided the necessary load capacity and installation speed, successfully reinforcing the foundation without the need for temporary casings. This real-world application underscores the value of a geotechnical reinforcement system that integrates drilling, grouting, and load bearing into one continuous process.
At the core of the SupUTS series is a ribbed hollow steel bar that performs three functions simultaneously: it acts as a sacrificial drill rod, an injection tube for grouting, and a permanent reinforcing member. This 3-in-1 design eliminates the need for separate casing and injection equipment, which is especially valuable in unconsolidated, cohesive, or unstable soil conditions. The SupUTS models are optimized for high ultimate tensile strength, as indicated by their designations. For example, the SSTR32/360 delivers an ultimate load of at least 360 kN, the SSTR38/660 reaches 660 kN, and the SSTR51/930 achieves 930 kN. These capacities far exceed standard hollow bar anchors of similar diameters.
The series also features standardized thread designs compatible with SupAnchor's accessory ecosystem, allowing for quick on-site connections and reduced labor intensity. Ribbed bar geometry with approximately 45-degree angled rib surfaces maximizes bonding with grouting materials while minimizing splitting forces on the surrounding ground, keeping crack widths below 0.1 mm at maximum load. This ensures structural integrity even under extreme loading conditions.
For corrosion protection, SupUTS offers three options: hot-dip galvanizing for basic resistance, SupCoating (HDG plus epoxy) for moderate to harsh environments, and stainless steel for highly corrosive settings such as coastal or chemical plant projects. This flexibility extends service life across diverse applications.
| Model | Outside Diameter (mm) | Ultimate Load (kN) | Yield Load (kN) | Cross-sectional Area (mm²) | Weight (kg/m) | Elongation (%) | Anchor Plate Size (mm) |
|---|---|---|---|---|---|---|---|
| SSTR32/360 | 32 | ≥360 | ≥280 | 450–500 | 3.5–4.0 | A100mm ≥6% / Agt ≥5% / A200mm ≥6% | 200 x 200 x 12 |
| SSTR38/660 | 38 | ≥660 | ≥520 | 800–850 | 6.3–6.8 | A100mm ≥6% / Agt ≥5% / A200mm ≥6% | 250 x 250 x 16 |
| SSTR51/930 | 51 | ≥930 | ≥730 | 1150–1200 | 9.0–9.5 | A100mm ≥6% / Agt ≥5% / A200mm ≥6% | 300 x 300 x 20 |
These technical parameters directly address the most demanding ground anchor challenges. The high yield-to-ultimate load ratios (approximately 78%) ensure that the anchor maintains structural integrity well beyond its working load. The standardized nut and coupler sizes — SW46/D42 for SSTR32, SW55/D50 for SSTR38, and SW65/D60 for SSTR51 — permit seamless integration with existing drilling and tensioning equipment. Lengths from 2 to 8 meters (or 6 m for the largest model) provide flexibility for various embedment depths. All models use high-strength steel consistent with EN10083-3 and EN10025 series, ensuring consistent quality for European and American markets.
The SupUTS series is particularly suited for heavy-duty geotechnical projects where standard ground anchor bolt systems fall short. Typical applications include:
In global infrastructure spending, the demand for efficient and safe geotechnical reinforcement systems continues to grow. The SupUTS drill-and-grout bolt simplifies construction by combining drilling and grouting in a single pass, reducing project timelines and labor costs. Its ability to perform in unstable ground conditions makes it a valuable tool for contractors facing unexpected soil variability. For mining and tunneling operations, the high load capacity and standardized threads allow rapid installation even in confined spaces, improving overall safety and productivity.
SupAnchor's position as Asia's No.1 manufacturer and exporter of self drilling anchor systems is built on continuous R&D and adherence to international standards. The SupUTS series reflects the company's commitment to professional engineering, innovative design, and collaborative project support. With ISO-certified manufacturing processes and a track record of supplying soil nail system manufacturer solutions to projects across more than 50 countries, SupAnchor provides ground anchor bolt factory-grade reliability to contractors and consultants worldwide.
The introduction of SupUTS addresses a clear market gap for a high-capacity hollow bar anchor that does not sacrifice installation efficiency. By combining enhanced tensile properties with the proven 3-in-1 integration principle, SupAnchor enables engineers to design more ambitious structures with confidence. Whether it is a coastal defense wall in Northern Europe, a deep foundation in a US urban center, or a tunnel portal in mountainous terrain, the SupUTS series delivers the performance and adaptability that modern geotechnical engineering demands.
For project owners and geotechnical contractors seeking a reliable geotechnical reinforcement system that reduces construction complexity, the SupUTS self drilling anchor system represents a forward-looking solution. Its high-strength design, corrosion protection options, and standardized components align with the industry's push toward faster, safer, and more durable ground anchoring methods. As infrastructure investments accelerate, SupAnchor remains a key partner in delivering innovative anchoring technology that meets both current and future engineering challenges.
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