High pressure resistant retrievable anchor rod and construction method thereof

Abstract

The invention relates to a high pressure resistant retrievable anchor rod. The high pressure resistant retrievable anchor rod includes an anchor tool, a sealing cover connected to the anchor tool, a sleeve connected to the anchor tool, a reinforcement body penetrating through the sleeve and extending into the sealing cover, and a conical clip for clamping the reinforcement body; the anchor tool isprovided with a conical hole matched with the conical clip, the sealing cover is internally provided with an anchor release plate sleeving the conical clip, the anchor release plate can push the conical clip move towards the direction away from the anchor tool axially; and the invention further includes a roof mechanism which is used for pushing the anchor release plate to move axially, the roofmechanism is connected to the anchor release plate, penetrates through the anchor tool, and extend to the outer side of the anchor tool. After adopting the the technical scheme of the invention, the anchor release plate is pushed through the roof mechanism, the conical clip for fastening an anchor reinforcement body is pushed out by the anchor release plate, so that the conical clip is separated from the conical hole of an anchor cup, and reinforcement body unlocking is realized; and the high pressure resistant retrievable anchor rod has the characteristics of reliable device and simple structure, and the construction method has the characteristics of reliable device and fast construction.

Description

technical field [0001] The invention relates to a high-pressure-resistant recyclable bolt and a construction method thereof, belonging to the technical field of building construction. Background technique [0002] Anchor bolts are widely used in foundation pit support projects. With the acceleration of urban construction, the environment of foundation pits for new buildings is becoming more and more complex, such as being close to existing buildings, surrounding plans to be built subway lines, excavation of foundation pits The line is close to the red line of the building, etc., so that the traditional anchor can not be constructed normally within the red line of the building, or the reinforcement cannot be removed after the construction, which seriously hinders the subsequent subway excavation. Therefore, the research and development of recyclable anchors that can recover the tendons can not only provide sufficient pull-out resistance during the foundation pit support to en...

AI Technical Summary

Problems solved by technology

[0003] At present, the recyclable bolt mainly adopts mechanical and hot-melt methods to realize the removal and recovery of tendons. However, because the mechanical type needs to be manually unlocked, when the length of the tendons is long, the grouting body squeezes the tendons, resulting in difficulty in recycling. And it is impossible to improve the pull-out bearing capacity of the bolt through high-pressure grouting; the hot-melt type relies on the wires placed in the casing together with the tendons to be energized, and the melting fixture is unlocked to achieve recovery. However, during the tensioning process of the tendons, due to the There is a difference between the elastic elongation of the wire and the elongation of the wire, which will easily lead to the breakage of the wire during the stretching process of the tendon body and the inability to melt the fixture and recycle it.

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