Tensile type anchoring device suitable for two-section type stepped anchor holes

Abstract

The invention relates to a tensile type anchoring device suitable for two-section type stepped anchor holes. The tensile type anchoring device comprises a tubular anchor rod body, a grouting pipe arranged in the anchor rod body in a penetrating manner and an anchor head. The anchor rod body comprises an anchoring section and a free section. The anchoring section comprises a first anchoring sectionbody and a second anchoring section body communicating with the first anchoring section body. The anchor head is connected to the end, away from the free section, of the grouting pipe. The second anchoring section body comprises at least two anchoring sub-sections, and anchoring frameworks II are arranged between the adjacent anchoring sub-sections, wherein the anchoring frameworks II are used for transversely expanding when pressed to enable the external diameters to be smaller than the internal diameters of the anchor holes in corresponding positions. Strip-shaped holes II are formed between adjacent frameworks of the anchoring frameworks II. The grouting pipe is correspondingly provided with grout discharge holes opposite to the multiple strip-shaped holes II. Steps are formed on junctures of the outer anchor holes and the inner anchor holes, and compacting parts II move to the positions of the steps in the pressed process. The tensile strength of the structure of an anchor rod canbe improved advantageously, the permeability degree and the combination degree of concrete and a soil layer or a rock layer during grouting is improved, the combination degree with a cured concrete structure can be improved advantageously, and the stability and the tensile strength of the whole are enhanced.

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 ...

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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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