In response to growing demands for durable and corrosion-resistant ground support solutions, SupAnchor® has introduced its new GFRP Solid Bolt, a solid-structure anchoring product designed for geotechnical engineering projects requiring reliable load-bearing capacity and long-term stability. The bolt is manufactured from high-quality Glassfiber Reinforced Polymer (GFRP), offering a robust alternative to traditional solid steel bolts in challenging environments such as humid tunnels, saline-alkali slopes, and mines with electromagnetic sensitivity.
The GFRP Solid Bolt eliminates the hollow structure of conventional injection bolts while preserving the inherent advantages of GFRP, including corrosion resistance, lightweight properties, and non-conductivity. Its solid cross-section provides enhanced load transfer and simplifies installation, making it a preferred choice for both temporary and permanent support systems.
The new bolt series is available in five standard diameters—20 mm, 22 mm, 25 mm, 28 mm, and 32 mm—each with a waved thread structure that optimizes bonding with grout and surrounding rock mass. The nominal cross-sectional areas range from 200 mm² to 500 mm², with guaranteed tensile loads from 200 kN to 500 kN. All variants feature a tensile E-modulus of 45 GPa and an ultimate strain of 2.0%, ensuring consistent mechanical performance across the product line.
Below is a summary of key technical specifications for the GFRP Solid Bolt series:
| Designation | Outside Diameter (mm) | Cross-Sectional Area (mm²) | Tensile Load (kN) | Weight (kg/m) |
|---|---|---|---|---|
| S20/200 | 20 | 200 | 200 | 0.52 |
| S22/240 | 22 | 240 | 240 | 0.62 |
| S25/320 | 25 | 320 | 320 | 0.83 |
| S28/400 | 28 | 400 | 400 | 1.04 |
| S32/500 | 32 | 500 | 500 | 1.30 |
The lightweight nature of the GFRP Solid Bolt, with a density approximately one-quarter that of steel, significantly reduces transportation costs and installation labor. Its non-conductive and non-magnetic properties make it ideal for projects near power facilities or precision instruments, where electromagnetic interference must be avoided. Additionally, the material can be easily cut on-site with common tools, preventing damage to mining or tunneling machinery during subsequent operations.
The GFRP Solid Bolt is primarily used for reinforcing rock masses, stabilizing slopes, and supporting underground engineering structures. Its excellent corrosion resistance ensures long-term durability in harsh environments, including coastal areas, chemical plants, and water-rich tunnels. The product serves as a dependable geotechnical reinforcement system for both temporary and permanent installations.
Key applications include:
As global infrastructure projects expand into more challenging terrains, the demand for advanced ground anchor solutions continues to rise. The GFRP Solid Bolt offers a competitive edge over traditional steel bolts, particularly in projects requiring long service life without frequent maintenance. Its compatibility with standard drilling and grouting equipment further enhances its adoption as a drill-and-grout bolt in various geological conditions.
SupAnchor® has established itself as a leading manufacturer of geotechnical reinforcement systems, including self drilling anchor systems, hollow bar anchors, and soil nail systems. The introduction of the GFRP Solid Bolt underscores the company’s dedication to innovation and quality. All products are manufactured in ISO-certified facilities, ensuring consistent performance and reliability.
“Our GFRP Solid Bolt addresses the critical need for a high-strength, corrosion-resistant anchoring solution that can withstand harsh conditions while reducing installation complexity,” said a company spokesperson. “We are committed to providing professional, innovative, and collaborative support to engineers and contractors worldwide.”
With a portfolio that encompasses self drilling anchor bolts, ground anchor bolt factory production, and comprehensive technical support, SupAnchor® continues to set benchmarks in the geotechnical industry. The GFRP Solid Bolt is now available for global shipment, with customization options for length and thread direction.
A major infrastructure project uses SupAnchor's self-drilling hollow bar anchors to overcome difficult geology, demonstrating efficient geotechnical reinforcement and industry-leading innovation.
SupAnchor’s SupHulk PM series friction rock bolts deliver high yield loads and immediate support in challenging geotechnical conditions, ensuring safety in mining and tunneling.
Advanced hollow bar anchor technology from SupAnchor is enabling safe construction of a high-speed rail tunnel through the Alps, reducing installation time and improving long-term ground support.
SupAnchor introduces the Sup2000 and Sup5000 high‑performance grout pumps, delivering up to 6000 L/h at 6.0 MPa, with remote control and rugged construction for anchor mortar, injection, and back‑filling in demanding civil and mining projects.
SupAnchor's self drilling anchor system was deployed to stabilize a challenging slope on a key highway in the Alps, showcasing advanced geotechnical reinforcement in difficult geology.
