In the heart of the Swiss Alps, a major tunnel construction project is overcoming severe geological challenges with the help of the self drilling anchor system from SupAnchor. The project, part of a high-speed rail link, required stabilization of highly fractured rock zones that threatened delays and safety risks. Engineers turned to SupAnchor's advanced drill-and-grout bolt technology to provide immediate support and long-term stability.
The construction site showcases the hollow bar anchor in action, where drilling and grouting occur simultaneously. The self drilling anchor bolt used in this project features a diameter of 25 mm, a tensile strength of 500 kN, and lengths tailored to rock conditions (3–6 m). Corrosion protection is provided by a hot-dip galvanized coating, applied in accordance with EN ISO 1461 standards. The table below summarizes key specifications:
| Parameter | Value |
|---|---|
| Diameter | 25 mm |
| Tensile Strength | 500 kN |
| Length | 3–6 m (adjustable) |
| Corrosion Protection | Hot-dip galvanized (ISO 1461) |
These parameters were chosen to address the site's highly fractured limestone and shale, where conventional rock bolt for underground mining methods would require multiple steps. The drill-and-grout bolt technique allowed continuous advancement, reducing cycle time by 30%. Field engineers reported that the ground anchor bolt factory quality assurance from SupAnchor ensured consistent performance, even in wet conditions.
This project highlights a growing demand for efficient geotechnical reinforcement systems in infrastructure development. As urbanization expands into mountainous regions, the need for soil nail system manufacturer expertise becomes critical. The self drilling anchor for retaining walls and slope stabilization is gaining traction in Europe and North America, where regulatory and environmental pressures favor methods that minimize surface disturbance. The ground stabilization anchor system used in this tunnel is a prime example of how innovation can accelerate project timelines while maintaining safety.
The micropile hollow bar anchor technology also finds applications in underpinning existing structures, as seen in recent bridge retrofits in Germany. By integrating drilling, grouting, and anchoring into a single operation, SupAnchor supports the industry's shift toward more sustainable construction practices. The self drilling bolt for civil engineering sectors bridges the gap between traditional heavy construction and modern precision engineering.
SupAnchor, a leading soil nail system manufacturer, has supplied over 50,000 anchor bolts to projects worldwide. The company holds ISO 9001 and ISO 14001 certifications, reflecting its dedication to quality and environmental management. With a philosophy of “Professional, Innovative, Collaborative,” SupAnchor works closely with contractors to customize solutions. The anchor bolt system for geotechnical engineering offered by SupAnchor is designed for extreme conditions, from arctic permafrost to tropical laterite soils.
As the alpine tunnel project progresses, SupAnchor's SDA bolt factory direct supply model ensures fast delivery and technical support. The final product image below demonstrates the precision manufacturing of the self drilling anchor bolt components.
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