Multi-petal combinable anchor rod centering support device and construction method thereof

Abstract

The invention discloses a multi-petal and combinable anchor rod centering support device, and relates to the field of reinforcement treatment of water conservancy and hydropower, roads, bridges and geotechnical engineering. The multi-petal and combinable anchor rod centering support device comprises an anchor rod and a centering support, wherein the centering support comprises a first centering support petal, a second centering support petal and a centering ridge frame; the anchor rod is wrapped by the first centering support petal and the second centering support petal, the first centering support petal and the second centering support petal are connected through a fixing device, and the fixing device comprises a first buckling tooth, a first buckling door, a second buckling door and a second buckling tooth. According to the multi-petal and combinable anchor rod centering support device, the problems that the production quality is uncontrollable, and anchor rod steel bars cannot be effectively centered due to the fact that most traditional centering supports are directly machined by field workers in the current anchor rod construction process are solved. The invention further relates to a construction method of the multi-petal combinable anchor rod centering support device.

Description

technical field [0001] The invention relates to the fields of water conservancy and hydropower, roads, bridges, and geotechnical engineering reinforcement treatment, and more specifically relates to a multi-lobe, combinable bolt centering support device. The invention also relates to a construction method of the multi-lobe, combinable centering support device for anchor rods. Background technique [0002] Geotechnical anchoring technology is an in-situ reinforced soil technology used to improve the stability of slopes, retaining walls and excavated bodies. It can be traced back to the coal mine reinforcement project in North Wales in 1890, and later formed as "New Austria". Tunnel Excavation Method” is the representative theory of rock and soil excavation and support. With more than a century of development, this technology has been widely used in many engineering fields around the world, especially in water conservancy and hydropower. At present, bolt support has become a...

AI Technical Summary

Problems solved by technology

Extruded PVC centering brackets, or due to different lengths of cuts, asymmetric positions, etc., form three or four flanges with different heights, which ultimately makes the bolt unable to be effectively centered in the drill hole

The problem is even more obvious for the centering bracket formed by welding—because the round steel bar is processed separately, the arching characteristics of each finished product may be different, and when the height of the flange is not obvious, it is impossible to form enough. Cement slurry protective layer thickness

[0013] 2) The installation of the centering bracket is not flexible, the positioning is not reliable, and it is easy to shift and affect the centering effect

The problem caused by the above-mentioned binding is that it is not easy to operate (the iron wire needs to shuttle between the centering bracket and the rod body), which makes the operation efficiency low, and the binding effect is not ideal, and loosening often occurs. Affects the given distance between brackets

When the distance between adjacent centering supports is too large, the steel rods between them will form sag under the action of their own weight, resulting in uneven thickness of the cement slurry protective layer

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