A recyclable prestressed anchor cable

Abstract

The invention relates to a recoverable prestressed anchor cable. The recoverable prestressed anchor cable comprises two stranded wires, at least one inner anchor head is connected to each stranded wire, and a bottom plate is arranged at the bottoms of the inner anchor heads and is provided with preformed holes allowing the stranded wires to penetrate connectively. A seal cover is arranged above the bottom plate, an upper gear shaft and a lower gear shaft are arranged inside the seal cover, a left gear set and a right gear set are connected to the gear shafts, each gear set comprises two gears, and circular grooves are formed in the lateral edges of outer races of the gears. The two stranded wires pass through the clearance between the two gear sets and are connected with the two gears of each gear set. When prestress is applied, the two gears on each gear shaft apply opposite torsion to be kept locked through the stranded wires, and at the moment, each gear set is in deadlock, the stranded wires can keep sufficient prestress; after construction is completed, the stranded wires can be detached and recovered conveniently and reused.

Description

technical field [0001] The invention relates to a prestressed tensioning device, in particular to a recoverable prestressed anchor cable. Background technique [0002] At present, with the acceleration of urbanization, the height of buildings in urban areas is getting larger and larger, and foundation pits are getting deeper and deeper, some of which can reach more than 30 meters. Attention has made the application of prestressed anchoring technology more and more, and the demand for prestressed anchor cables is also increasing. [0003] However, although prestressed anchor cables have the advantages of high bearing capacity and high reliability, because the existing prestressed anchor cables are permanently stored after entering the ground and cannot be recycled, the waste of steel is serious during actual construction. In addition, it often happens that the existing prestressed anchor cables invade the property lines of adjacent buildings, which affects the construction o...

AI Technical Summary

Problems solved by technology

[0003] However, although prestressed anchor cables have the advantages of high bearing capacity and high reliability, because the existing prestressed anchor cables are permanently stored after entering the ground and cannot be recycled, the waste of steel is serious in actual construction.

In addition, existing prestressed anchor cables intrude into the property lines of adjacent buildings, which affects the construction of adjacent buildings.

It can be seen that due to the above shortcomings, the prestressed anchor cable cannot yet become a sustainable support system, and the existing prestressed anchor cable still has shortcomings such as large recovery force and low manual operability.

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