Block assembly type yielding hollow grouting anchor rod and construction method thereof

Abstract

The invention discloses a block assembly type yielding hollow grouting anchor rod. The block assembly type yielding hollow grouting anchor rod comprises a hollow anchor rod body, a hollow anchor cablerod body, a yielding device, a tray, a nut, a slurry stopping plug, an anchor cable hoop sleeve and a chambering device, wherein the yielding device, the tray, the nut and the slurry stopping plug are arranged on the hollow anchor rod body, the anchor cable hoop sleeve and the chambering device are arranged on the hollow anchor rod body, and the hollow anchor rod body is connected with the hollowanchor cable rod body through a connecting sleeve. The block assembly type yielding hollow grouting anchor rod can give full play to the advantages of an anchor rod and an anchor cable, not only canthe hanging action of the anchor rod to shallow surrounding rock be utilized, but also the stability of deep surrounding rock can be improved by utilizing the anchor cable, favorable independent and multipoint yielding effects on the hollow anchor rod body can be achieved by the yielding device, the whole harmony of the hollow anchor cable rod body is improved by a anchor cable hoop, multipoint grouting is realized by the chambering device, the rod body length can be freely adjusted according to requirement, and on-site construction and adjustment are convenient.

Description

technical field [0001] The invention relates to the fields of geotechnical engineering anchorage and engineering support, in particular to a segmentally assembled yielding pressure hollow grouting anchor and a construction method thereof. Background technique [0002] In underground engineering, mining engineering, tunnel engineering, foundation pit and slope engineering, bolt is the main support technology for stratum reinforcement, preventing stratum deformation and instability. The interaction of the physical force of the hole wall and rock actively improves the strength and stability of the rock and soil mass, making it reach a safe and stable state. The anchor cable is made of flexible and bendable steel strands. It has the advantages of convenient installation, large anchoring depth, high bearing capacity and active reinforcement of surrounding rock. It is widely used in the support structure of underground engineering. [0003] Combining the anchor rod and the anchor...

AI Technical Summary

Problems solved by technology

[0003] Combining the anchor rod and the anchor cable can give full play to the advantages of the two. At present, steel strands and rebars are welded together, but the welding connection reduces the strength of rebars and steel strands, and the adhesion Disadvantages of insufficient adhesive bonding

The Chinese patent with the patent number of 201510091352.7, the construction method of the assembled hollow grouted anchor, provides an assembled hollow grouted anchor, which not only realizes the assembled connection of the anchor rod and the anchor cable, but also realizes the detachable section However, the advantage of the anchor cable technology is that the anchoring depth is large. The above-mentioned patents fail to give full play to the advantages of the anchor cable, and do not inject reinforcement grout into the entire anchor hole, so the effect of full-length anchoring cannot be achieved.

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