In geotechnical engineering, reliable ground support is often challenged by two persistent issues: corrosion-induced degradation of steel anchors and the logistical burden of heavy reinforcement systems. SupAnchor, a leading ground anchor bolt factory, has introduced the SupFRP® GFRP Solid Bolt, a high-strength, solid composite anchor that directly addresses these challenges. This self drilling anchor bolt replaces traditional hollow bar anchors with a robust, corrosion-resistant alternative, offering a geotechnical reinforcement system that promises long-term stability for slopes, tunnels, and mines.
The SupFRP® GFRP Solid Bolt is engineered for projects where conventional steel bolts falter—whether due to saline groundwater, acidic soils, or electromagnetic interference. By utilizing Glassfiber Reinforced Polymer (GFRP), SupAnchor eliminates the hollow core of injection bolts while retaining the material’s inherent benefits: lightweight construction, non-conductivity, and exceptional corrosion resistance. This positions the product as a durable alternative to solid steel bolts in both temporary and permanent support applications.
At the heart of the SupFRP® GFRP Solid Bolt is a waved thread structure that enhances bonding with grouting materials or rock mass, ensuring uniform load transfer. The solid cross-section, characterized by its nominal cross-sectional area, delivers high tensile capacity without the need for internal reinforcement. The bolt is available in five standard diameters—20mm, 22mm, 25mm, 28mm, and 32mm—with guaranteed tensile loads ranging from 200 kN to 500 kN, making it suitable for a wide spectrum of ground support tasks.
One of the standout features is the bolt’s light weight: with a density approximately one-quarter that of steel, the GFRP bolt reduces transportation costs and on-site handling effort. For instance, the S25/320 model weighs just 0.83 kg/m, a fraction of an equivalent steel anchor. This advantage is particularly valuable in remote or difficult-to-access sites where logistics dominate project economics. Moreover, the bolt’s non-conductive and non-magnetic properties make it safe for use near power facilities, railways, and precision instruments, where stray currents or magnetic interference could compromise both safety and functionality.
The SupFRP® GFRP Solid Bolt offers several key advantages for field use:
The following table summarizes the key technical parameters for the SupFRP® GFRP Solid Bolt series:
| Model | Outside Diameter (mm) | Nominal Cross-sectional Area (mm²) | Guaranteed Tensile Load (kN) | Tensile E-Modulus (GPa) | Ultimate Strain | Weight (kg/m) | Thread (Left/Right hand) | Length Options (m) |
|---|---|---|---|---|---|---|---|---|
| S20/200 | 20 | 200 | 200 | 45 | 2.0% | 0.52 | Left or Right | 2–11 |
| S22/240 | 22 | 240 | 240 | 45 | 2.0% | 0.62 | Left or Right | 2–11 |
| S25/320 | 25 | 320 | 320 | 45 | 2.0% | 0.83 | Left or Right | 2–11 |
| S28/400 | 28 | 400 | 400 | 45 | 2.0% | 1.04 | Left or Right | 2–11 |
| S32/500 | 32 | 500 | 500 | 45 | 2.0% | 1.30 | Left or Right | 2–11 |
In addition to these mechanical properties, the bolt offers easy cuttability, allowing on-site trimming with common tools without damaging mining or tunneling machinery during subsequent operations. This feature speeds up installation and reduces downtime. Furthermore, the GFRP material resists rust and degradation, guaranteeing a long service life with minimal maintenance—a critical factor for permanent infrastructure.
The SupFRP® GFRP Solid Bolt is designed for a broad range of geotechnical applications. In slope stabilization, it provides reliable rock mass anchoring against sliding and weathering, especially in coastal or saline environments where steel corrosion is a persistent threat. For underground tunnels and mines, the bolt reinforces roofs and walls without the risk of sparking or electrical conductivity, enhancing safety in gassy or electrically sensitive conditions. Its corrosion resistance also makes it ideal for temporary support systems that may remain in place longer than planned due to project delays.
From a market perspective, the demand for durable, low-maintenance ground support is rising as infrastructure ages and environmental regulations tighten. The global push toward sustainable construction favors materials like GFRP that reduce lifecycle costs and carbon footprint. SupAnchor’s product enters a competitive landscape where drill-and-grout bolts and hollow bar anchors have long dominated, but its solid composite construction offers a distinct advantage in terms of longevity and versatility. As a soil nail system manufacturer and ground anchor bolt factory, SupAnchor positions itself at the forefront of this shift.
SupAnchor has built its reputation on delivering professional, innovative, and collaborative solutions for geotechnical challenges. The development of the SupFRP® GFRP Solid Bolt reflects the company’s ongoing investment in research and development, incorporating advanced composite materials and manufacturing techniques. With ISO-certified production facilities and a track record of successful projects worldwide, SupAnchor ensures that every bolt meets rigorous quality standards. From high-speed rail corridors in Europe to mining operations in North America, the company’s anchors have proven their worth in the most demanding conditions.
By introducing the SupFRP® GFRP Solid Bolt, SupAnchor reinforces its commitment to providing engineers and contractors with reliable, future-proof ground support systems. Whether used as a self drilling anchor system for immediate installation or as a long-term structural element, this product embodies the principles of durability, safety, and efficiency that define modern geotechnical engineering.
SupAnchor's self drilling anchor system was recently used in a major European infrastructure project to stabilize deep excavations and retaining walls, overcoming difficult geology with high-performance hollow bar anchors and drill-and-grout bolts.
SupAnchor launches SupFRP GFRP Solid Bolt, a high-strength, corrosion-resistant anchor for slopes, tunnels, and mines. Features lightweight design and long service life.
SupAnchor's advanced self-drilling anchor system supports challenging slope stabilization on a key European highway, demonstrating superior geotechnical reinforcement in difficult ground conditions.
SupAnchor's GFRP SDA Bolt integrates drilling, grouting, and anchoring for efficient tunnel face stabilization and slope reinforcement. High strength, corrosion resistance, ISO threads.
SupAnchor's self drilling anchor system proves effective in stabilizing weak ground for a large European infrastructure project, enhancing safety and efficiency.
