A Study on Cable-Removing Scheme of the Cable-Stay System of the Zhijing River Bridge

The Zhijing River Bridge is a CFST arch bridge in Hubei province. The limitations are more cables, as the angles of some cables are very small and made cable adjusting difficult in construction. The Iterative optimization method with once-tension principle and alignment controlled by pre-cambers is introduced into the alignment control and cable-force calculation of the erection stage. All cables should have been removed after the arch rib closure in the original design, but in the latter hoisting construction, the early cable force and elevation were influenced seriously and the inner force of main arch rib became uneven. The influence by the time, order and method of cable-removing are calculated in the optimization process and the new cable-removing schemes are brought forward. In that, part of the cables removed before closure, and they are analyzed and compared to each other, and then a best scheme with easier control is determined.