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T73 Self-Drilling Hollow Anchor Bolt
T73 Self-Drilling Hollow Anchor Bolt is a high-performance rock and soil reinforcement solution designed for challenging ground conditions. Featuring a R32/R38/T38/T40/T52 thread profile with 73mm outer diameter, this hollow bar anchor system combines drilling, grouting, and anchoring functions in a single operation. Ideal for tunnel support, slope stabilization, foundation pit reinforcement, and mining applications, the T73 self-drilling anchor bolt eliminates the need for pre-drilling and casing in loose or collapsing formations. Manufactured from high-strength alloy steel with continuous hot-rolled threads, it ensures superior load-bearing capacity and corrosion resistance. Compatible with standard drilling rigs and injection equipment, T73 hollow anchor bars significantly improve construction efficiency while reducing project costs.
Key Specifications: Outer Diameter 73mm | Wall Thickness 10-16mm | Yield Strength ≥355MPa | Ultimate Load 400-800kN
T76 Self-Drilling Hollow Anchor Bolt
T76 Self-Drilling Hollow Anchor Bolt represents the heavy-duty solution for deep foundation support and high-load geotechnical applications. With its robust 76mm outer diameter and enhanced wall thickness (12-20mm), this large-diameter hollow anchor system delivers exceptional performance in micro-pile construction, dam foundation anchoring, bridge abutment stabilization, and deep excavation support. The T76 self-drilling anchor rod features optimized T-thread design for maximum bond strength with grout and surrounding soil/rock mass. Its integrated drilling-bit connection allows simultaneous drilling and grouting, making it the preferred choice for complex geological conditions including soft ground, fractured rock, and water-rich formations. Available in various steel grades (S355, S460, 45#) with hot-dip galvanizing or epoxy coating options for extended service life.
Key Specifications: Outer Diameter 76mm | Standard Length 1-12m (customizable) | Yield Strength 355-640MPa | Ultimate Tensile Load 600-1200kN

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