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Home > News > Industry Information > Common Application Structures of Self-Drilling Hollow Anchor Bolts

Common Application Structures of Self-Drilling Hollow Anchor Bolts


In recent years, the demand for robust geotechnical support solutions has driven advancements in drilling equipment technology. The escalating costs of labor, rentals, and the need for efficient work timelines have steered the construction industry towards innovative solutions. Among these, self-drilling hollow anchor bolts have emerged as versatile tools, finding applications in various structures. This article shows the evolving landscape of self-drilling hollow anchor bolts, and explore their common application structures.

I. Prestressing Anchor Bolts

Self-drilling hollow anchor bolts have significantly enhanced slope stabilization by serving as prestressing anchor bolts. In scenarios where traditional anchor cables face challenges, such as increased labor costs and complex geological conditions prone to hole collapse, these bolts emerge as efficient alternatives. After the grout solidifies, the bolts implement tension, ensuring a secure and long-lasting anchoring effect.

II. Micropiles

Micropiles, formed by drilling and grouting self-drilling hollow anchor bolts downward, have become integral components in foundational structures. These micropiles find applications in diverse settings, ranging from wind power station tower foundations and transmission tower foundations to building foundations, retaining wall piling, and bridge piling. The adaptability of self-drilling hollow anchor bolts in creating stable and load-bearing foundations makes them indispensable in modern construction practices.

III. Soil Nails

In slope stabilization projects, self-drilling hollow anchor bolts serve as alternatives to conventional steel solid bars as soil nails. These bolts offer enhanced performance in supporting slopes and can also be employed in deep foundation pits and steep slope stabilization. The flexibility and efficiency of self-drilling hollow anchor bolts make them instrumental in projects requiring reliable soil stabilization solutions.

IV. Rock Bolts

Self-drilling hollow anchor bolts prove invaluable in reinforcing rocky slopes and tunnels facing surface weathering or severe joint development. By drilling into the rock mass and subsequently grouting, these bolts effectively bond the rock together, bolstering stability. Applications range from highways and railroads prone to collapse to rocky slope reinforcement, especially in loose tunnel mouths where self-drilling hollow anchor bolts can replace traditional pipe sheds for effective reinforcement.

self drilling anchor bolt system application

V. Foundation Reinforcement and Disaster Management

As original geotechnical support systems age, issues such as slope deformations, foundation settlements, and roadway surface uplift may arise. Self-drilling hollow anchor bolts offer a reliable solution for reinforcing foundations or managing disasters. By drilling into original slopes, foundations, or tunnel floors and performing grouting, these bolts consolidate cracks and prevent geological disasters, ensuring the longevity and resilience of support structures.


The evolution of self-drilling hollow anchor bolts provides great support for geotechnical support practices. Their versatility in various applications, from slope stabilization to foundational support and disaster management, highlights their crucial role in contemporary construction. As technology continues to advance, self-drilling hollow anchor bolts are poised to further revolutionize the industry, providing innovative solutions to complex geotechnical challenges. Builders, engineers, and construction professionals can confidently embrace these advancements, knowing that self-drilling hollow anchor bolts are at the forefront of efficient and reliable geotechnical support systems.