A combined anchor for fiber-reinforced composite cable and its preparation method

Abstract

The invention discloses a combined anchorage device for a fiber reinforced composite inhaul cable. The combined anchorage device comprises a steel sleeve, a sleeve cavity of the steel sleeve is divided into a flat section and an oblique section, an anchor plate is arranged at the tail end of the steel sleeve, limiting plug pins for fixing are arranged on the sleeve wall of the steel sleeve, a plurality of conical holes are formed in the anchor plate and internally provided with integrated wedge-shaped clamping pieces, a split plate is arranged at the front end of the steel sleeve, one ends offiber reinforced composite bars penetrate into the steel sleeve from the split plate and penetrate out from the integrated wedge-shaped clamping pieces, the part, between the anchor plate and the split plate, in the sleeve cavity is filled with glue, and a grouting hole is formed in the sleeve wall of the steel sleeve. During preparation of the anchorage device, pre-tensioning is conducted firstly, gaps between the integrated wedge-shaped clamping pieces and the anchor plate as well as between the integrated wedge-shaped clamping pieces and the fiber reinforced composite bars are eliminated, then pre-tensioning force is withdrawn, the glue is injected into the sleeve cavity, the limiting plug pins are taken out before tensioning construction, and thus anchorage device preparation is completed. The combined anchorage device is good in anchorage effect, the 'notch effect' is lowered, and the risk of creep relaxation is reduced.

Description

technical field [0001] The invention relates to the field of cable anchors, in particular to a combined anchor for fiber-reinforced composite cable and a preparation method thereof. Background technique [0002] Due to the advantages of high strength, light weight, good corrosion resistance and fatigue resistance, fiber reinforced composite bars are expected to replace prestressed steel bars or bridge cables in practical engineering. The fiber-reinforced composite material reinforcement composed of unidirectional continuous fiber filaments and resin matrix, and the fiber-reinforced composite material cable composed of multiple fiber-reinforced composite material reinforcement materials, have very significant anisotropy characteristics , the transverse shear strength perpendicular to the fiber direction is much smaller than the tensile strength parallel to the fiber direction (only about 1 / 10), which brings difficulties to the anchoring of fiber reinforced composite bars / cabl...

AI Technical Summary

Problems solved by technology

The large anchorage length of the bonded anchor leads to a large anchorage size, which requires higher performance of the bonding medium

At the same time, there are uncertainties in the creep performance and aging performance of organic resins as anchor fillers, and there are defects such as large creep and slip deformation.

The "notch effect" of the clip-type anchor is obvious, and the pinch-off failure is prone to occur at the loaded end. At the same time, the poor synchronization of the clips leads to low anchoring efficiency and poor anchoring stability.

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