Torsion Control Technology of Stay Cable Installation of Long-span Cable-stayed Bridge
In the installation and construction of long-span cable-stayed bridges,super-long stay cables often cause serious problems such as equipment damage and anchor removal due to tension and torsion.By optimizing the stress analysis of cable-stayed steel wire,the maximum torque generated by cable tension is calculated based on the principle of energy method.According to the analysis results,the anti-torsion device of jack is designed and checked,and the maximum deflection of the anti-torsion device is checked.The finite element software is used for simulation analysis,and the analysis results are consistent with the calculation results.It is verified by the construction site of the stay cable installation of the main bridge of Jiayu Yangtze River Highway Bridge that the large-tonnage anti-torsion jack can effectively prevent the adverse effects caused by the tension and torsion of the cable,and ensure the tension quality of the cable and the installation and construction progress.
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