A grouting method for high-density anchor bolts

Abstract

The invention discloses a high-compactness anchor rod grouting method. According to the method, a slurry inlet pipe, a slurry outlet pipe and a blocking head are selected, the pipe diameter of the slurry outlet pipe is less than the pipe diameter of the slurry inlet pipe; the blocking head sleeves at the front end of an anchor rod to be fixed on the orifice of an anchor rod hole; the slurry inlet pipe and the slurry outlet pipe penetrate through the blocking head, and the slurry inlet pipe, the slurry outlet pipe and the anchor rod are integrally fixed by virtue of a fixing ribbon; continuous grouting is adopted, the slurry outlet of the slurry outlet pipe is sealed when slurry uniformly flows out of the slurry outlet of the slurry outlet pipe, and the slurry inlet of the slurry inlet pipe is sealed after continuously grouting for 1-2min so as to complete anchor rod grouting. Compared with an existing grouting method, air and residual slurry in holes are discharged through the slurry inlet and the slurry outlet when the continuous grouting is adopted, so as to save a grouting material, and the grouting compactness of the anchor rod can reach above 95%; and the grouting method is simple and convenient in manufacturing, installation and using, low in cost, and capable of reducing the number of operators and a requirement on the skill level of the operators after being used.

Description

technical field [0001] The invention relates to a method for bolt support grouting, in particular to a high-density bolt grouting method. Background technique [0002] In the bolt support construction of traditional underground caverns such as side and roof arches, the anchor grouting mainly uses the mortar or anchoring agent in the anchor hole to push the top of the grouting pipe out of the anchor hole (that is, the method of withdrawing the pipe in the hole) and using The air gun blows the anchoring agent rolls into the hole one by one, and then inserts the anchor rod to squeeze the anchoring agent out of the anchor hole. The method of withdrawing the pipe in the hole requires skilled workers to carefully operate during the construction process of the anchor grouting. The density of the anchor grouting can be judged by the hand feeling of the skilled worker, which requires a high level of operators. The quality fluctuates greatly, and the labor cost is high; blowing the a...

AI Technical Summary

Problems solved by technology

The method of withdrawing the pipe in the hole requires skilled workers to carefully operate during the construction process of the anchor grouting. The density of the anchor grouting can be judged by the hand feeling of the skilled worker, which requires a high level of operators. The quality fluctuates greatly, and the labor cost is high; blowing the anchoring agent roll into the air gun requires low technical level of the operator, but the loss of the grouting material is serious, and the quality of the anchor bolt filling density cannot be guaranteed, and the operation process There are security risks

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