In heavy civil engineering and geotechnical construction, ground conditions often dictate the feasibility of a project. For contractors working in unstable soils, deep excavations, or high-load foundation reinforcements, conventional anchoring methods can be slow, costly, and sometimes unsafe. SupAnchor, Asia’s No.1 manufacturer and exporter of self-drilling anchors, has introduced the SupUTS series, a high-performance hollow bar anchor designed to deliver ultimate tensile strengths up to 930 kN. This new line of drill-and-grout bolts integrates drilling, grouting, and reinforcement into a single operation, offering a robust geotechnical reinforcement system for the most challenging jobsites.
The SupUTS self-drilling anchor system is built around a ribbed hollow steel bar that serves as a sacrificial drill rod, injection tube, and permanent load-bearing member. This 3-in-1 integration removes the need for casing and separate grouting equipment, making installation faster and safer—especially in unconsolidated, cohesive, or unstable ground where conventional step-by-step drilling risks borehole collapse. The series is available in three primary models: SSTR32/360, SSTR38/660, and SSTR51/930, with ultimate loads of ≥360 kN, ≥660 kN, and ≥930 kN respectively.
The SupUTS line is engineered for high-load applications where standard anchors fall short. Its ribbed profile maximizes bonding with grout, and the 45° angled rib surfaces reduce splitting forces on surrounding soil or rock, keeping crack widths below 0.1 mm at maximum load. The table below summarises key technical data for the three models.
| 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 |
| Estimated Weight (kg/m) | 3.5–4.0 | 6.3–6.8 | 9.0–9.5 |
| Standard Lengths (m) | 2,3,4,5,6,7,8 | 2,3,4,5,6,7,8 | 2,3,4,5,6 |
| Anchor Plate Size (mm) | 200×200×12 | 250×250×16 | 300×300×20 |
Corrosion protection is a critical factor in permanent anchoring. The SupUTS series offers three anti-corrosion options: hot-dip galvanizing for basic protection, SupCoating (hot-dip galvanizing plus epoxy) for enhanced resistance in moderately aggressive environments, and stainless steel for long-term durability in marine or chemical plant settings. This flexibility allows engineers to specify the right level of protection based on soil chemistry and exposure conditions, extending service life and reducing lifecycle costs.
The SupUTS self drilling anchor bolt is particularly suited for heavy-duty geotechnical projects, including deep foundation reinforcement for high-rise buildings, load-bearing support for long-span bridges, and stabilization of deep slopes or soft cohesive soils. In tunnel excavation, where high tensile and yield strengths are mandatory, the SSTR51/930 model delivers the necessary capacity to support large sections safely. For projects in coastal or chemically aggressive environments, pairing the anchor with stainless steel or SupCoating ensures that the geotechnical reinforcement system remains reliable for decades.
Unlike traditional ground anchor systems that require separate drilling, casing, and grouting steps, the SupUTS hollow bar anchor streamlines construction. The hollow core allows grout to be injected under pressure while the bar remains in place, filling voids and improving bond with the surrounding ground. This drill-and-grout bolt technique reduces installation time by up to 50% compared to conventional methods, according to SupAnchor’s field data, and minimises the risk of borehole collapse in unstable formations.
As global infrastructure investment accelerates—especially in transport, energy, and urban development—demand for reliable soil nail system manufacturer and ground anchor bolt factory solutions continues to grow. SupAnchor’s SupUTS series addresses this need with standardised thread designs and accessory compatibility, reducing procurement complexity for contractors and engineering firms in Europe and North America. The company’s ISO-certified manufacturing processes and track record of supplying self drilling anchor systems to major projects worldwide position the SupUTS as a competitive alternative to traditional European anchor brands.
Furthermore, the integration of drilling, grouting, and reinforcing in a single product reduces the number of equipment and personnel required on site, improving safety and lowering overall project costs. For geotechnical engineers, the ability to specify high-load hollow bar anchors with predictable performance data—such as ultimate loads, yield loads, and elongation values—enables more accurate design and risk management. The SupUTS series’ ribbed profile and optimised thread geometry also ensure consistent load transfer, making it a preferred choice for permanent support in water conservancy, port terminals, and coastal defence structures.
SupAnchor’s commitment to innovation and collaboration is evident in the SupUTS line. By offering a range of diameters and load capacities, along with customisable corrosion protection, the company provides a comprehensive geotechnical reinforcement system that adapts to diverse project requirements. Whether it is a deep foundation in dense urban area or a slope stabilisation in a remote mountainous region, the SupUTS self drilling anchor system delivers the performance and reliability that modern infrastructure demands.
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