An anchoring method for a bolt

Abstract

The anchoring method of the anchor rod of the present invention relates to the technical field of building construction, comprising the following steps: (1) first drilling a pre-drilled hole with the same diameter; The reaming head extends into the pre-drilled hole; (3) Control the anchor drilling machine to pull the inner rod so that the knife plate protrudes from the knife plate receiving groove outside the jacket, and the fluid is pressed into the liquid guide between the inner and outer rods through the pump (4) Control the inner and outer rods to rotate together through the anchor drilling rig, and pull the inner and outer rods forward at the same time, so that the knife plate rotates to cut a hole larger than the diameter of the pre-drilled hole; (5) Push the inner rod backward to turn the inner rod When the rod is pushed back to make the cone block of the reaming head abut against the front end of the guide sleeve, the knife plate will be retracted into the knife plate receiving groove in the outer casing under the action of the spring, and the reaming head in the hole will be brought together as a whole. Out of the hole, complete the hole reaming; (6) Put the prefabricated anchor rod into the expanded hole, and pour the anchoring agent in the hole, and the anchoring agent will be completed after the anchoring agent solidifies.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to an anchoring method for anchor rods. Background technique [0002] In the construction of the existing bolt support technology, the installation and anchoring process of the anchor is generally as follows: first, use a drill bit matching the diameter of the anchor rod body to drill an anchor hole on the wall at the installation position of the anchor rod, and put the anchor hole into the anchor hole. Put a certain specification of anchoring agent to the bottom of the hole, push the anchor rod into the anchor hole, after the anchoring agent solidifies, the anchor rod is anchored in the anchor hole. The diameter of the anchor hole constructed by this technology is uniform, and there is no diameter change feature. When the anchor rod bears axial tension, the adhesion between the anchor rod and the anchoring agent is relatively tight, but the anchoring agent and the anc...

AI Technical Summary

Problems solved by technology

However, if the soil layer is not hard enough, the bearing capacity will be greatly reduced. When the conventional technology is used for bolt support, the strength of the hole wall of the anchor hole is insufficient, and the bonding surface between the anchoring agent and the hole wall is easy to be damaged under the action of shear stress. Damage occurs, and the anchor rod and anchoring agent are separated from the bonded soil layer hole wall as a whole, resulting in anchorage failure and safety accidents

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