Self-sensing extrusion inhaul cable and manufacturing method thereof

Abstract

The invention provides a self-sensing extrusion inhaul cable and a manufacturing method thereof. The self-sensing extrusion inhaul cable comprises a cable body and anchoring assemblies at the two ends, wherein a plurality of steel strands are arranged in the cable body, each steel strand is formed by twisting a central wire and a plurality of side wires, the central wire of one or more steel strands in the cable body is provided with a groove, a fiber bragg grating sensor is embedded in each groove, and the end part of each fiber bragg grating sensor is welded with a test jumper wire. The self-sensing extrusion inhaul cable can effectively monitor and evaluate the environment, stress and loss state in the inhaul cable using process, and direct information is provided for feedback guidanceof inhaul cable installation construction and safety evaluation in the later operation process. The embedded fiber bragg grating sensor is firm in structure, the survival rate of the sensor can be guaranteed, complex procedures of externally pasting the sensor are reduced, sensor installation errors are eliminated, and the embedded fiber bragg grating sensor can be widely applied to real-time monitoring of cable force of inhaul cables for bridge rock and soil structures.

Description

technical field [0001] The invention relates to the technical field of cables used in bridge geotechnical structure engineering, in particular to a self-sensing extruded cable and a manufacturing method thereof. Background technique [0002] As a component that bears tension, the cable has been widely used in bridges, geotechnical, construction and other projects. The cable mainly includes clip anchors, cold cast anchors, hot cast anchors and other forms. In the patent document whose publication number is CN101210447A, it is disclosed that a whole bunch of steel strands extrudes the anchor cable stay cable, which can make each steel strand of the stay cable be squeezed sufficiently. It solves the problem that the steel strand cannot be anchored reliably, it is easy to slip off after being subjected to high-frequency vibration, and the cost of other forms of anchorage is high. At present, steel strand extruded cables are widely used in bridge structures such as large arch br...

AI Technical Summary

Problems solved by technology

The function of the sealing cylinder is to seal the end of the cable anchor to prevent corrosion. Opening the sealing cylinder will affect its sealing effect and shorten the service life of the cable

After the lead wire of the fiber optic grating sensor is drawn out from the threaded hole on the side of the sealing cylinder, it is exposed outside the cable and cannot be protected. Because the fiber lead wire is thin and not pressure-resistant, it is easily damaged during movement and transportation and cannot be used.

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