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为克服桥址处不良地质情况和河段水位受大潮汐变化影响的不利因素,木兰溪输水钢管拱桥通过设计方案优化,大胆采用大跨度、无推力柔性系杆钢管拱桥结构,采用轻型双钢管哑铃式拱肋结构。在施工过程中,应地制宜,综合采用浮筒技术,利用潮位变化实施栈桥排架墩的施工和栈桥梁的浮拖架设;拱肋采用分段卧拼、逐段合拢的拼装工艺;采用拱肋线型控制和施工应力监控等先进技术措施,确保施工质量和安全。从而节约投资、缩短工期,取得了显著的社会经济效益。
In order to overcome the unfavorable geological conditions at the bridge site and unfavorable factors of the river level influenced by the large tidal changes, Mulan Stream water-filled steel tube arch bridge is optimized through the design scheme, boldly adopts the long-span and no-thrust flexible steel tube arch bridge structure, Dumbbell arch structure. In the construction process, according to local conditions, the integrated use of buoy technology, the use of changes in tidal level pier trestle pier construction and the implementation of the floating bridge trestle set; arch ribs using sub-horizontal fight, piece by piece assembly process; Rib type control and construction stress monitoring and other advanced technical measures to ensure the construction quality and safety. So as to save investment, shorten the construction period, and achieved remarkable social and economic benefits.