The Chengkou Ren River Grand Bridge, a key project of the Xi'an - Chongqing High - Speed Railway, features a low - pylon cable - stayed main bridge. With its cable - stiffened structure and integrated bridge - screen system, it employs the pylon - beam - pier consolidation configuration. To address the long - standing issue of extended construction periods in traditional cable - beam synchronous construction, the delayed tensioning of stay cables technique is applied to cable area segments, deferring cable tensioning by one cantilever - cast beam segment. Using MIDAS/Civil, a comprehensive whole - bridge finite - element model was developed. Comparative studies show that this innovative method converts sequential flow construction into partial parallel operations, slashing the construction time and boosting efficiency. It also enables precise control of the bridge's alignment, meeting design criteria perfectly. This achievement provides valuable references for similar bridge projects.
Yuan et al. (Wed,) studied this question.