In a significant advancement for heavy-duty ground engineering, SupAnchor—Asia’s largest manufacturer and exporter of self-drilling anchors—has unveiled the SupUTS series of self-drilling hollow bar anchors. Engineered for projects where conventional reinforcement methods fall short, the SupUTS system integrates drilling, grouting, and tensioning into a single, seamless operation, delivering ultimate tensile strengths of up to 930 kN. This innovation addresses the growing global need for reliable, high-capacity ground support in challenging soils, from deep foundation pits to large-scale tunnel excavations.
The SupUTS series is designed for use in unconsolidated, cohesive, or unstable ground where traditional step-by-step drilling and casing are either inefficient or unsafe. By employing a ribbed hollow steel bar that simultaneously functions as a sacrificial drill rod, grout injection channel, and permanent load-bearing member, the system dramatically shortens construction cycles and reduces equipment footprint—a critical advantage in congested urban sites or remote infrastructure projects.
At the heart of the SupUTS line is a focus on ultimate tensile strength (UTS)—the maximum stress a material can withstand before failure. This emphasis is reflected in the product naming, with models such as SSTR32/360, SSTR38/660, and SSTR51/930 indicating minimum guaranteed ultimate loads of 360 kN, 660 kN, and 930 kN, respectively. These figures position the anchors well above standard self-drilling systems, making them suitable for high-load applications like deep foundation reinforcement of high-rise buildings, anchoring of large-span bridge abutments, and permanent stabilization of critical slopes.
The hollow bars feature a continuous thread profile (standardized across SupAnchor’s ecosystem) that allows for fast coupler and nut attachment without the need for welding or special tooling. The ribbed geometry, optimized with a 45° flank angle, not only enhances bond strength with the grout body but also minimizes splitting forces on the surrounding soil or rock, keeping crack widths below 0.1 mm at maximum design load. This attention to detail ensures long-term structural integrity and durability.
To meet diverse environmental challenges, the SupUTS series is offered with three anti-corrosion protection levels: hot-dip galvanizing for basic defense in dry or slightly humid conditions; SupCoating, a dual-layer system combining galvanization with epoxy coating for moderate to aggressive environments like industrial zones or semi-coastal areas; and full stainless steel construction for extreme chemical or marine exposures. Such flexibility allows engineers to specify exactly the durability required, extending service life and reducing maintenance costs.
| Model | Ultimate Load (kN) | Yield Load (kN) | Cross-Sectional Area (mm²) | Weight (kg/m) | Typical Anchor Plate |
|---|---|---|---|---|---|
| SSTR32/360 | ≥360 | ≥280 | 450–500 | 3.5–4.0 | 200×200×12 mm |
| SSTR38/660 | ≥660 | ≥520 | 800–850 | 6.3–6.8 | 250×250×16 mm |
| SSTR51/930 | ≥930 | ≥730 | 1150–1200 | 9.0–9.5 | 300×300×20 mm |
All models are manufactured from high-strength steel conforming to EN10083-3 and EN10025 specifications, with elongation values (A100mm ≥6% / Agt ≥5% / A200mm ≥6%) that ensure ductile behavior under overload conditions. Standard lengths are available in multiples of 1 meter, from 2 m up to 8 m for smaller diameters and shorter maximums for the heaviest SSTR51/930. The system includes a full range of compatible nuts, couplers, and bearing plates, all engineered for uniform load transfer.
The SupUTS self-drilling anchor system is already gaining traction in projects that demand both speed and exceptional load capacity. In a recent deep excavation for a high-rise foundation in unstable alluvial soil, the SSTR38/660 model enabled crews to install 15 m long anchors in a single pass, eliminating the need for pre-drilling and temporary casing. The project’s geotechnical engineer noted a 40% reduction in installation time compared to traditional post-grouted anchors, while achieving design loads with a high safety margin.
In tunneling, the system’s ability to consolidate loose ground ahead of the face is particularly valuable. When used as forepoling or spiling, the hollow bar anchor allows continuous grouting while drilling, filling voids and stabilizing the arch before excavation advances. This reduces overbreak and improves worker safety in challenging rock conditions. The higher yield loads of the SupUTS series mean fewer anchors per linear meter, cutting material and labor costs.
Slope stabilization and retaining wall projects benefit from the dual function of the ribbed bar. The enhanced bond strength minimizes creep and long-term deformation, even in expansive clay or weathered shale. For marine and coastal structures, the stainless steel anti-corrosion option ensures a design life exceeding 50 years without additional protective measures—an essential requirement for port terminals, seawalls, and offshore foundation anchors.
As infrastructure investment accelerates worldwide—from Southeast Asian metro systems to European motorway widenings—the demand for reliable, high-performance ground reinforcement technologies is surging. The self-drilling anchor bolt market, valued at over $800 million in 2023, is projected to grow at a CAGR of 6.5% through 2030, driven by urbanization and the need to upgrade aging transport networks. SupAnchor’s SupUTS series directly addresses this trend by offering a geotechnical reinforcement system that combines installation efficiency with high ultimate strength.
Contractors increasingly favor drill-and-grout bolts over conventional alternatives because they reduce the number of site operations and equipment, lower labor exposure to hazardous conditions, and minimize environmental disruption. The SupUTS hollow bar anchor also aligns with sustainable construction practices by eliminating the waste associated with temporary steel casings and reducing grout consumption through optimized bonding.
SupAnchor’s position as the No.1 soil nail system manufacturer and ground anchor bolt factory in Asia is built on a foundation of rigorous R&D and international certifications. The company operates ISO 9001, ISO 14001, and ISO 45001 certified facilities, with a dedicated testing laboratory that validates every production batch to exceed the requirements of EN 14490 and other global standards. Its engineering team collaborates closely with contractors and consultants to develop customized anchoring solutions, from initial design through to post-installation testing.
The introduction of the SupUTS series exemplifies SupAnchor’s commitment to pushing the boundaries of ground engineering. By focusing on ultimate tensile strength without compromising the integrated design philosophy, the company provides a tool that empowers engineers to design bolder, more cost-effective structures. Every anchor is a product of advanced metallurgy, precision rolling, and a deep understanding of geotechnical behavior—values that have earned the trust of infrastructure builders on five continents.
Looking ahead, SupAnchor plans to expand the SupUTS range with additional diameters and thread configurations, ensuring compatibility with the latest drilling rigs and monitoring systems. As project requirements grow more complex, the firm’s collaborative approach—working hand-in-hand with clients to test new ground conditions and develop application-specific accessories—will continue to drive the evolution of the self drilling anchor system into a cornerstone of modern construction.
SupAnchor is a leading manufacturer and exporter of self-drilling and grouted anchor systems, serving mining, tunneling, slope stabilization, and deep foundation projects worldwide.
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