About the author:

1. Meng Ji Railway Co., Ltd., Hohhot,Inner Mongolia 010000,China; 2. China Railway Design Corporation,Tianjin 300308,China; 3. China State Railway Group Co., Ltd., Beijing 100010,China; 4. School of Civil andHydraulic Engineering, Ningxia University, Yinchuan, Ningxia 750021,China; 5. China Railway No.10Engineering Group Co., Ltd., Jinan, Shandong 250010,China; 6. China Railway18th Bureau Group Co., Ltd., Tianjin 300222,China

Abstract:

Wuhai Yellow River Bridge of Baotou⁃Yinchuan High⁃speed Railway strictly follows theapproval requirements of flood control evaluation and navigation demonstration, the main bridge adoptsthe hybrid box girder cable⁃stayed bridge structure with span arrangement of (80+80+310+80+80) m,and innovatively adopts the “ bi⁃directional large⁃displacement bearing + longitudinal and transversaldampers + flexible anti⁃vibration drop beams” trinity comprehensive support restraining system, which isthe best choice to support and restrain the bridge. The bridge tower adopts vase⁃type concrete structurewith good seismic performance, the height of the tower on the Baotou side is 114. 5m, and the height ofthe tower on the Yinchuan side is 118m. The total length of the main girder is 632.4m, adopting the formof steel⁃concrete combination structure, the concrete box girder is used for 121.2m at each end to ensurethe stability of the structure, and the steel box girder of lower weight is used for the middle part of thebridge of 390m, and the jewel⁃type cross section of the single box and five chambers is combined with thedesign of the back plate of the half⁃open chamber. The design of the steel⁃concrete combined sectioneffectively optimizes the structural stress performance. The bridge is equipped with 56 pairs of fan⁃shaped parallel steel wire cable ties, of which the tower end adopts the combined anchoring scheme of tooth blockanchor and steel anchor beam, and the girder end adopts the pre⁃buried anchor plate anchoring scheme.The analysis and calculation results show that the bridge fully meets the specification requirements interms of structural stiffness, strength, track smoothness and wind⁃vehicle⁃bridge coupling dynamicresponse. Through the design and research of this project, a series of innovative results are achieved inthe comprehensive support restraint system adapted to high intensity seismic zone, lightweight box girderand steel⁃concrete combined section structure, cable⁃stayed cable anchorage technology and steel boxgirder construction process.