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1. Introduction

Hollow anchor refers to a rod that transfers structural loads or geotechnical loads to stable rock formations. An anchor consists of a rod, a drill joint, a pad, a grouting plug and a nut. As an efficient anchoring method, it is widely used in tunnel pre-support, slopes, coasts, mines, water conservancy projects, building foundations, roadbed reinforcement, and the treatment of geological diseases such as landslides, cracks, and collapses. It plays an irreplaceable role in small construction environments. Compared with other anchors, the advantage of self-drilling anchors is that they are suitable for complex formation conditions and difficult drilling (such as cracks, clay, loose, narrow, broken and other geological conditions), providing comprehensive anchoring solutions for industries such as foundation pit excavation and engineering support.

2. Classification

Hollow anchors can be divided into two types: T thread and R thread. T thread is designed and produced according to international standards and can be quickly connected and installed on site. Hollow rods have left or right threads and are suitable for standard rotary impact drilling. R-type self-drilling anchor rod is fully threaded, with specifications ranging from R25-R51. It consists of hollow anchor rod, nut, anchor plate, connector, drill bit and other components. Due to the functions and characteristics of its own system, it can ensure the anchoring effect under complex foundations during construction. It can be widely used in railways, subways, mines, tunnels and other projects to ensure the stability of the foundation and play a very important role in safety protection. It provides solutions for anchoring and micro-piling under complex foundation conditions.

3. Advantages of using self-drilling anchoring system

3.1. It is easy to penetrate various rock masses and can work under complex and broken foundation conditions.

3.2. It can be extended with a coupler.

3.3. No need to pull out.

3.4. The hollow rod can be used as a grouting channel.

3.5. Drilling, grouting and anchoring can be completed at the same time.

3.6. Optional epoxy coating can prevent corrosion and can be used permanently.

3.7. It has many uses and is widely used, including tunnel stabilization and reinforcement, dam slopes, avalanche safety protection, support engineering, etc.

3.8. Simple installation, easy operation, greatly improving work efficiency.

About Jiufu

Jiufu specializes in the production of mining support equipment products. Our advantageous products include self-drilling, hollow anchor rods, pipe seam anchor rods, welded mesh, diamond mesh, U-shaped steel, etc. Jiufu is committed to providing the best quality products at the most competitive prices in the safest working environment.