Hollow grouting anchor effectively improves the stability and integrity of surrounding rock

Hollow grouting anchor cable is a special type of anchor cable that combines the advantages of grouting anchor cable and resin anchor cable. By increasing the grouting pressure, the slurry diffuses into the surrounding rock fractures while filling the borehole, playing a bonding and solidification role in the surrounding rock, achieving deep hole anchoring. Its main components include:
Hollow anchor body: Adopting a hollow design, the middle hole of the rod is used as the high-pressure wind and water channel and grouting channel for drilling. Compared with solid rods, the hollow rod design can achieve better stiffness and shear strength. At the same time, the outer surface of the anchor is a full-length standard large pitch threaded structure, which not only facilitates the cutting and extension of the anchor rod, but also increases the bonding area between the anchor rod body and the grouting material, thereby improving the anchoring force.
Anchor head: Made of steel material, it can fix and center the anchor body components, and can generate a certain anchoring force in the anchor hole.
Stop plug: Made of rubber plastic material, it has the function of grouting and exhaust, and provides a certain sealing effect, making it easy to achieve pressurized grouting and increasing the fullness and density of the grouting material. In addition, it also serves as a central support.
Pad: Adopting hot-rolled formed pad, it has a certain elasticity and is easy to transfer stress. The pad also provides a 7-degree adjustable angle for easy adhesion to the rock surface.
Nut: Hemispherical or hexagonal nuts can be used to apply active stress to the rod body through the nut.
Hollow grouting anchor cables are mainly used for long-term support of surrounding rocks with moderate and good geological conditions, as well as advanced support, slope support, foundation pit support and other engineering projects in highways, railways, tunnels. It eliminates the possibility of air pockets, ensures that the anchoring slurry is fully filled in the borehole, and simplifies the construction steps, improving construction efficiency.
However, attention should also be paid to issues such as hole blockage and difficulty in grouting during use, which may affect the bearing capacity of the anchor rod. Therefore, selecting high-performance hollow grouting anchor cables and taking appropriate countermeasures are the key to ensuring the effectiveness and safety of hollow grouting anchor cables.
Overall, the hollow grouting anchor cable effectively improves the stability and integrity of the surrounding rock through its unique design and working principle, providing reliable support solutions for various projects.