In a significant development for the global geotechnical and mining sectors, SupAnchor, a leading Chinese manufacturer of self drilling anchor systems and hollow bar anchor solutions, has officially launched its new SupCT Bolt System. This innovative combination bolt is engineered to provide both immediate and long-term rock support, addressing the growing demands for infrastructure resilience in challenging ground conditions. Designed with a focus on durability and efficiency, the SupCT Bolt System promises to streamline installation processes while ensuring permanent corrosion resistance.
The product introduction comes at a time when tunneling, slope stabilization, and mining operations increasingly require reliable ground support that can withstand harsh environments. With options in both steel and glass fiber reinforced polymer (GFRP), the SupCT Bolt System offers a versatile solution for a wide range of geological profiles, from hard rock to soft ground. The system’s duplex corrosion protection and factory-preassembled components set a new benchmark in the industry, reducing on-site labor and enhancing safety.
One of the standout features of the SupCT Bolt System is its SupCoat corrosion protection technology. This duplex system combines hot dip galvanization (HDG) in accordance with NS-EN-ISO 1461 and epoxy powder coating per NS-EN 13438, creating a robust barrier against aggressive environments. The rebar bolt, treated with this dual layer, is then encased in a plastic grouting pipe and fully embedded in cement mortar. This multi-layer defense extends the service life of the bolt significantly; depending on the type, steel bolts can achieve a lifespan of 50 to 150 years, while GFRP bolts offer permanent corrosion resistance.
For project owners and engineers, this means reduced maintenance costs and enhanced structural integrity over the lifecycle of the supported structure. The inherent advantages are particularly relevant in coastal, chemical, or high-moisture settings where traditional steel bolts may quickly degrade. Furthermore, the system’s design prevents mortar leakage and splashing during installation, improving on-site safety.
The SupCT Bolt System is available in two primary material categories: Steel Bolt and GFRP Bolt, each with solid and hollow bar variants. This wide selection allows engineers to tailor the support to specific load requirements and installation constraints. Key performance parameters are summarized in the tables below:
| Model | Type | Weight (kg/m) | Yield Load (kN) | Ultimate Load (kN) | Service Life |
|---|---|---|---|---|---|
| SSB-M20 | Solid Bar | 2.47 | 157 (grouted) / 123 (end anchored) | 186 / 147 | 50–150 years |
| SSB-M22 | Solid Bar | 2.98 | 239 / 191 | 300 / 239 | 50–150 years |
| SSB-M33 | Solid Bar | 6.43 | 402 / 347 | 482 / 416 | 50–150 years |
| SHB-R2715 | Hollow Bar | 2.47 | 159 / 159 | 191 / 191 | 50–150 years |
| SHB-R2712 | Hollow Bar | 2.98 | 246 / 246 | 270 / 270 | 50–150 years |
Note: End anchored loads assume expansion shell anchorage. Actual performance depends on rock quality; on-site tests are recommended.
| Model | Type | Weight (kg/m) | Ultimate Load (grouted, kN) | End Anchored Load (GFRP nut/Steel nut, kN) | Service Life |
|---|---|---|---|---|---|
| GSB-R22 | Solid Bar | 0.69 | 250 | 60 / 140 | Permanent |
| GSB-R25 | Solid Bar | 0.90 | 350 | 70 / 180 | Permanent |
| GSB-R32 | Solid Bar | 1.45 | 560 | 90 / 230 | Permanent |
| GHB-R25 | Hollow Bar | 0.63 | 220 | 70 / 180 | Permanent |
| GHB-R28 | Hollow Bar | 0.88 | 280 | 80 / 200 | Permanent |
| GHB-R32 | Hollow Bar | 0.99 | 360 | 90 / 230 | Permanent |
GFRP bolt data references CSA S807, ACI 440.6M, and ASTM D7957M. All GFRP bolts have an elongation of 0.02.
Additional key specifications include borehole diameters of 45–48 mm for most models and 64–68 mm for larger M33/R32 types, with borehole depth set at bolt length plus 150 mm. Torque values range from 120 to 450 Nm depending on the bolt type. These standardized dimensions ensure easy adaptation to common drilling equipment and facilitate rapid installation.
The SupCT Bolt System is tailor-made for a wide spectrum of geotechnical reinforcement projects. Whether used as a permanent rock support for tunnels, a soil nail system manufacturer's choice for slope stabilization, or as a ground anchor bolt in deep excavations, its dual functionality as both immediate and permanent support reduces the need for multiple support components. By combining the features of a standard rock bolt with advanced grouting and corrosion protection, the system delivers significant cost and time savings on site.
In tunneling, the optimized grouting design ensures that the annulus is completely filled, starting from the borehole end, which maximizes bond strength and prevents voids that could lead to corrosion or load transfer failure. The factory-installed expansion shells eliminate the risk of thread damage and corrosion before installation, a common pain point in remote or poorly stocked sites. Moreover, the bolt head design prevents mortar leakage during grouting, protecting workers and reducing waste.
The use of GFRP bolts offers additional advantages in environments where electromagnetic transparency or cuttability is required, such as in railway or subway tunnels adjacent to sensitive instrumentation, or in temporary mining applications where later excavation may be necessary. Their lightweight nature also improves handling safety and reduces transportation costs. The steel hollow bar variants, on the other hand, provide the ability to grout through the bolt after placement, a feature often utilized in self drilling anchor bolt applications where simultaneous drilling and grouting is not required but post-grouting is needed.
SupAnchor has established itself as a trusted name in the self drilling anchor system market, exporting to over 50 countries. As a leading ground anchor bolt factory and soil nail system manufacturer, the company’s commitment to quality is underpinned by ISO certifications and rigorous testing in accordance with international standards such as EN, ASTM, and CSA. The SupCT Bolt System is a testament to the brand’s philosophy of Professional, Innovative, and Collaborative engineering. By investing heavily in R&D, SupAnchor continuously refines its hollow bar anchor and drill-and-grout bolt technologies to meet evolving project demands.
Recent projects involving SupAnchor’s anchor solutions have demonstrated remarkable performance in major infrastructure developments, including highway tunnels in Southeast Asia, hydroelectric caverns in South America, and mining operations in Africa. The SupCT Bolt System, with its duplex protection and high ductility, is poised to become the default specification for consultants and contractors seeking long-term, maintenance-free rock support.
For more information about the SupCT Bolt System or to request a sample, engineers and procurement professionals can visit the official website. With delivery lengths ranging from 1.5 to 6.0 meters and a variety of accessory components, SupAnchor offers a turnkey solution that simplifies inventory management and accelerates project timelines.
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