In the demanding world of underground construction and mining, the reliability of ground support systems is paramount. SupAnchor, a leading manufacturer of self-drilling anchor systems based in China, has unveiled its latest innovation: the SupCT Bolt System. This comprehensive rock support solution addresses the dual challenges of immediate load-bearing and long-term durability, offering engineers a versatile tool for a wide range of geological conditions.
The SupCT Bolt System is engineered to provide immediate and permanent support in a single installation, eliminating the need for multiple support components. It is available in two main categories: Steel Bolts (including solid and hollow bar types) and GFRP Bolts (including solid and hollow bar types). The steel variants offer high ductility, while the GFRP options provide permanent corrosion resistance. Key technical specifications are outlined in the tables below.
| Model | Type | Weight (kg/m) | Thread | Yield Load (kN) Fully Grouted | Ultimate Load (kN) Fully Grouted | Borehole Diameter (mm) |
|---|---|---|---|---|---|---|
| SSB-M20 | Steel Solid | 2.47 | M20 | 157 | 186 | 45–48 |
| SSB-M22 | Steel Solid | 2.98 | M22 | 239 | 300 | 45–48 |
| SSB-M33 | Steel Solid | 6.43 | M33 | 402 | 482 | 64–68 |
| SHB-R2715 | Steel Hollow | 2.47 | R27 | 159 | 191 | 45–48 |
| SHB-R2712 | Steel Hollow | 2.98 | R27 | 246 | 270 | 45–48 |
The GFRP bolt range offers a lightweight alternative with permanent corrosion resistance and excellent tensile strength. Models such as the GSB-R32 achieve an ultimate load of 560 kN in fully grouted conditions, while the hollow GHB-R32 provides 360 kN. These bolts are ideal for environments where corrosion is a critical concern, such as in chemically aggressive soils or marine conditions.
| Model | Type | Weight (kg/m) | Rebar OD (mm) | Ultimate Load (kN) Fully Grouted | End Anchored Load (kN) Steel Nut | Borehole Diameter (mm) |
|---|---|---|---|---|---|---|
| GSB-R22 | GFRP Solid | 0.69 | 22 | 250 | 140 | 45–48 |
| GSB-R25 | GFRP Solid | 0.90 | 25 | 350 | 180 | 45–48 |
| GSB-R32 | GFRP Solid | 1.45 | 32 | 560 | 230 | 64–68 |
| GHB-R25 | GFRP Hollow | 0.63 | 12/25 | 220 | 180 | 45–48 |
| GHB-R28 | GFRP Hollow | 0.88 | 28/12 | 280 | 200 | 45–48 |
| GHB-R32 | GFRP Hollow | 0.99 | 32/15 | 360 | 230 | 64–68 |
The SupCT Bolt System is designed for a variety of rock support scenarios, including tunneling, mining, slope stabilization, and foundation engineering. Its duplex corrosion protection system—combining hot dip galvanization and epoxy powder coating—ensures a service life of up to 150 years, making it suitable for permanent works in aggressive environments. The system's factory-preassembled components reduce on-site labor and inventory complexity, while the optimized grouting design guarantees complete filling of boreholes. The bubble design of the plastic grouting pipe enhances pull-out resistance, providing reliable anchorage even in poor ground conditions.
For end-anchored applications, the system achieves high loads. For example, the steel SSB-M22 yields 191 kN with end anchoring, while the GFRP GSB-R32 with steel nuts reaches 230 kN. These performance metrics are critical for engineers designing support systems for deep excavations or high-stress rock masses.
As global infrastructure projects expand into more challenging terrains, the need for efficient and durable geotechnical reinforcement systems becomes acute. The SupCT Bolt System addresses this demand with a product that combines immediate support with long-term durability. Its adoption in major tunneling projects—such as those for railways, highways, and hydropower—can reduce project timelines and maintenance costs. The system's compliance with international standards (e.g., ASTM, DIN, CSA) ensures it meets the rigorous requirements of European and American markets.
SupAnchor's commitment to innovation is evident in the system's design. The company's R&D efforts focus on improving corrosion protection and load-bearing capacity, as well as simplifying installation. With ISO certifications and a track record of global projects, SupAnchor positions itself as a reliable partner for contractors and engineers worldwide.
In conclusion, the SupCT Bolt System represents a significant advancement in rock support technology. By offering a versatile, durable, and efficient solution, it helps engineers overcome geological challenges while ensuring safety and longevity of underground structures. For more information, visit www.supanchor.com.
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