Device for evenly tensioning anchor cable

Abstract

A device for evenly tensioning an anchor cable comprises two oil cylinder position control plates and a plurality of small tensioning oil cylinders. The two oil cylinder position control plates are arranged at the two ends of the tensioning oil cylinders respectively, at least two position control drawing zones are arranged on the peripheries of the oil cylinder position control plates at equal intervals, each position control drawing zone corresponds to one tensioning oil cylinder and is provided with a steel strand hole and two position control plate screw holes, wherein the two position control plate screw holes are located around the steel strand hole. The tensioning oil cylinders comprise oil cylinder bodies which are cylindrical. Oil cylinder base plates are arranged at the rear ends of the oil cylinder bodies, oil cylinder end plates are arranged at the front ends of the oil cylinder bodies, and the oil cylinder inner walls of the oil cylinder bodies form steel strand cavities through which steel strands pass. The device is simple in structure and convenient to load and unload, equal prestress can be applied to all the steel strands of the whole anchor cable, and therefore integrality and durability of the anchor cable are improved.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering anchoring, in particular to an anchor cable uniform tensioning device. Background technique [0002] There are mainly two ways to prestress the anchor cable by using the prestressed anchor cable tensioning equipment. One is to tension and lock the whole bundle of anchor cables at one time, and the other is to lock the individual steel strands successively and separately. [0003] These two methods will cause different stresses on the steel strands in the same bundle of anchor cables, which are mainly reflected in: (1) The elongation of the steel strands in the same bundle of anchor cables is the same, but each steel strand provides The prestress is different; (2) Due to the tension sequence in the same bundle of anchor cables, the elongation of each steel strand is different, and the prestress provided is also different. [0004] These two tensioning methods will cause serious sa...

AI Technical Summary

Problems solved by technology

[0004] These two tensioning methods will cause serious safety hazards to the stable service of the prestressed anchor cable, and the single steel strand will be broken and wire-drawn, and the load of the single steel strand will be transferred and increased in turn, resulting in Domino-style failure of strands in lowered or whole bundles of anchor cables

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