Advantages of Hollow Grouting Anchor Cable:
Structural Innovation: The body of the hollow grouting anchor cable features a novel hollow structure with an integrated grout core tube. Utilizing reverse grouting, it eliminates the possibility of air pockets and ensures thorough grouting of the borehole. Additionally, it simplifies construction by eliminating the need for separate air and grout pipe connections.
Rapid Load Bearing: The upper portion of the cable is anchored with a resin mixing coil, while the lower end is secured with threading. This design allows for immediate load bearing after installation, particularly advantageous in unstable roof strata.
Reliable Locking: Employing threaded locking mechanisms ensures dependable operation without slipping or sparking, even in damp or water-laden underground environments.
Convenient Installation: Installation and pre-tensioning methods mirror those of resin anchor rods, eliminating the need for tensioning procedures. This enables integrated, rapid installation combining mixing and tensioning, with the cable and rod bearing loads simultaneously for comprehensive support.
Small Aperture, High Tonnage: The cable's innovative structure, including the body and locking mechanism, minimizes diameter while maintaining grouting aperture, resulting in smaller installation apertures capable of supporting significant loads.
Articulation Functionality: The threaded locking mechanism allows for articulation, ensuring uniform and minimal protrusion of the Hollow Grouting Anchor Cable, thus preserving effective tunnel height.
Disadvantages of Hollow Grouting Anchor Cable:
Limited Load Capacity: The load capacity of Hollow Grouting Anchor Cable is constrained by the contact area between the anchor rod and grout, as well as grouting pressure, resulting in relatively lower load capacities.
Risk of Hole Blockage: During grouting, blockages may occur within the borehole, preventing complete filling and compromising the anchor rod's load-bearing capacity.
Grouting Difficulty: Due to the cable's small internal voids, achieving thorough grouting is challenging, potentially leading to inadequate grout penetration and even damage to the anchor rod.
In summary, Hollow Grouting Anchor Cable offers structural innovation, rapid load bearing, reliable locking, convenient installation, small aperture with high tonnage capacity, and articulation functionality. However, it is important to consider its limitations such as restricted load capacity, risk of hole blockage, and grouting difficulties. When choosing anchor cable types, it is crucial to weigh these pros and cons against specific project requirements.
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