Tension-resistant anchor for two-stage stepped anchor holes

Abstract

The invention relates to a tension-resistant anchoring device suitable for a two-stage stepped anchor hole, comprising a tubular anchor body, a grouting pipe and an anchor head pierced in the anchor body; the anchor body includes an anchoring section and a free section The anchor section includes a connected first anchor section and a second anchor section; the anchor head is connected to the end of the grout pipe away from the free section; the second anchor section includes at least two anchor segments and adjacent anchor segments are provided with When under pressure, it expands laterally to form an anchoring skeleton II whose outer diameter is smaller than the inner diameter of the anchor hole at the corresponding place; strip holes II are formed between adjacent skeletons of the anchoring skeleton II; the grouting pipe is correspondingly provided with a plurality of strip holes II. hole; the joint of the outer anchor hole and the inner anchor hole forms a step and the compactor I moves to the step when it is under pressure; it is beneficial to increase the tensile strength of the bolt's own structure, and the permeability and the permeability of the concrete and the soil layer or the rock layer during grouting are improved. The combination degree is beneficial to improve the combination degree with the cured concrete structure, and enhance its overall stability and pull-out strength.

Description

technical field [0001] The invention relates to the field of slope protection, in particular to a tension-resistant anchoring device suitable for two-stage stepped anchor holes. Background technique [0002] Anchor is one of the most important equipment in civil construction, and it is often used to reinforce slopes and roadways. The anchor rod is divided into an anchor section and a free section, wherein the anchor section is buried in the ground and is capable of bearing axial tension through grouting. [0003] In the existing structure, in order to increase the tension between the anchor and the ground, threads are usually provided on the outer wall of the anchor, but this structure still has insufficient tensile strength and a low degree of integration with the cured concrete structure, making the anchor It is easy to loosen, causing the reinforcement structure to be unstable and affecting the stability of the overall stratum or rock formation, and because the concrete ...

AI Technical Summary

Problems solved by technology

[0003] In the existing structure, in order to increase the tension between the anchor and the ground, threads are usually provided on the outer wall of the anchor, but this structure still has insufficient tensile strength and a low degree of integration with the cured concrete structure, making the anchor It is easy to loosen, causing the reinforcement structure to be unstable and affecting the stability of the overall stratum or rock formation, and because the concrete of the traditional grouting technology has a fast setting speed, the permeability and combination with the overall soil or rock stratum are not high, making the It is easy to pull out the concrete structure and the anchor rod as a whole during the action, thereby affecting the overall stability; at the same time, because the concrete in the traditional grouting technology uses natural condensation and does not compact it, the strength of the cured concrete structure is not high. And the permeability and combination with the soil layer or rock layer are not high

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