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ZBRF specializes in delivering high-performance connection solutions for tunnel engineering. Our manufactured Tunnel Bolts and Segment Bolts are widely used in connecting segments for various underground tunnels, ensuring structural stability and safety. Among them, the Polaris tunnel bolts series maintains exceptional fatigue resistance even under extreme working conditions, thanks to their superior mechanical properties.
To address different geological conditions, we have developed a rock bolt tunnel system that effectively reinforces surrounding rock, forming a complete support system together with tunnel segment bolts. These specialized bolts are manufactured from high-quality alloy steel and undergo strict heat treatment and anti-corrosion processes, meeting the high standards for load-bearing capacity and durability required in shield tunneling construction.
The company strictly adheres to ISO quality standards, and our products have been successfully applied in multiple national key tunnel projects, providing reliable support for subways, highway tunnels, and hydraulic tunnels. We offer customized solutions tailored to client needs, delivering comprehensive services from technical selection to installation guidance.
Photos of Segment / Tunnel Bolts
Technical Requirement of Segment / Tunnel Bolts
1.Material :grade 4.6,5.8,6.8,8.8,10.9,12.9
2. finish
Plain,Dacroment,Hot Dip Galvanized
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Main Product:
Rail fasteners,
Railway sleepers fixings,
Tension clamp,
Rail clip ,
Screw spike,
Track bolt
