SupAnchor Introduces SupUTS High-Capacity Self-Drilling Hollow Anchor for Heavy-Duty Ground Engineering

In major infrastructure projects across Europe and North America, geotechnical engineers often confront unstable soils, fractured rock, and stringent load requirements. Conventional anchoring methods require multiple steps—drilling with casing, removing the drill string, inserting a bar, and then grouting—adding time, cost, and risk. SupAnchor, Asia's leading manufacturer of self-drilling anchors, has introduced the SupUTS series, a high-strength hollow bar anchor designed to consolidate these steps into one efficient operation.

The SupUTS self-drilling anchor system embodies a 3-in-1 integration principle: the ribbed hollow steel bar serves simultaneously as a sacrificial drill rod, an injection tube for grouting, and a permanent reinforcement element. This approach eliminates separate casing and injection equipment, streamlining installation in unconsolidated or cohesive ground where traditional methods struggle. The "UTS" designation—Ultimate Tensile Strength—signals enhanced load capacities tailored for high-demand applications.

Technical Specifications and Engineering Value

The SupUTS series includes three primary models: SSTR32/360, SSTR38/660, and SSTR51/930. These designations reflect the nominal outside diameter in millimeters and the guaranteed ultimate load in kilonewtons. For example, the SSTR51/930 offers an ultimate load of at least 930 kN, suitable for deep foundation reinforcement and heavy-duty tunnel support.

Key technical features of the SupUTS self drilling anchor bolt include a ribbed profile along the hollow bar, which maximizes bond strength with grouting materials and reduces splitting forces on surrounding soil. The 45° angled ribs keep crack widths below 0.1 mm at maximum load, ensuring structural integrity. All models use high-strength steel conforming to EN10083-3 / EN10025 series, with elongation properties of A100mm ≥6% and Agt ≥5%. Threaded ends enable rapid connection with compatible couplers, nuts, and plates, minimizing on-site assembly time.

Corrosion protection is a critical consideration for long-term durability. SupAnchor offers three anti-corrosion treatments for the entire SupUTS range: hot-dip galvanizing (HDG) for general environments, SupCoating (HDG plus epoxy) for moderately corrosive conditions, and stainless steel for highly aggressive environments such as coastal or chemical plant sites. This flexibility allows engineers to specify the optimal solution for each project's service life requirements.

The hollow bar anchor design allows grout to be injected through the bar itself, filling the annular space and any voids in the surrounding ground. This drill-and-grout bolt method creates a continuous, monolithic bond along the entire anchor length, enhancing load transfer and providing superior pull-out resistance compared to traditional post-installed anchors.

Application Scenarios and Industry Value

The SupUTS geotechnical reinforcement system is engineered for heavy-duty applications where standard anchors fall short. Typical scenarios include:

• Deep foundation reinforcement for high-rise buildings, large-span bridges, and industrial structures requiring loads exceeding 500 kN per anchor.
• Slope stabilization in unstable or fractured rock, where high tensile strength prevents progressive failure.
• Tunnel support in soft ground or deep excavation, where immediate load-bearing capacity is essential to control convergence.
• Mining and underground construction, where rapid installation and robust performance reduce downtime and enhance safety.
• Coastal and marine structures, where stainless steel or SupCoating options provide long-term corrosion resistance.

In the context of global infrastructure renewal, self drilling anchor systems are gaining traction due to their speed and adaptability. For contractors, the elimination of casing reduces equipment needs and can cut installation time by 30–50% compared to conventional methods. This translates into lower project costs and earlier project completion, a key advantage in competitive bidding environments.

Moreover, the standardized thread design and accessory compatibility with SupAnchor's broader product ecosystem ensure that the SupUTS series can be integrated into existing project specifications with minimal re-engineering. As a soil nail system manufacturer and ground anchor bolt factory, SupAnchor provides comprehensive technical support and custom length options up to 8 meters (for SSTR32/360 and SSTR38/660) or 6 meters (for SSTR51/930), allowing precise adaptation to site conditions.

SupAnchor: Professional, Innovative, Collaborative

SupAnchor has established itself as the No.1 manufacturer and exporter of self-drilling anchors in Asia, with a portfolio that includes R/T thread anchors, T thread anchors, and the new SupUTS high-strength series. The company's commitment to innovation is reflected in its continuous R&D efforts, which focus on optimizing thread geometry, steel chemistry, and anti-corrosion technologies to meet evolving market demands.

Quality assurance is paramount: SupAnchor's manufacturing facilities are ISO 9001 certified, and all products undergo rigorous testing for tensile strength, elongation, and dimensional accuracy. The company has supplied anchors for landmark projects worldwide, including high-speed rail tunnels, deep excavation support in urban centers, and slope stabilization in challenging terrains.

With the SupUTS series, SupAnchor reinforces its brand message of being professional, innovative, and collaborative—working closely with geotechnical consultants, contractors, and owners to deliver reliable anchoring solutions that push the boundaries of what is possible in ground engineering.

For more information on the SupUTS self drilling anchor system and its applications, please visit www.supanchor.com or contact our technical sales team.