兰州深安黄河大桥钢拱梁步履式顶推施工技术

发布时间：2018-03-01 04:14

本文关键词： 钢拱组合梁桥钢拱梁顶推施工步履式顶推设备导梁工艺优化施工技术　出处：《世界桥梁》2014年05期 　论文类型：期刊论文

【摘要】：兰州深安黄河大桥主桥为主跨156 m的下承式蝶形钢拱组合梁桥,主梁为等截面钢-混凝土结合梁,主桥全部拼装完总重约4000 t。针对主桥重量大、跨度大的特点,以及施工对航道、交通的影响大等难点,设计钢拱梁多点同步步履式顶推施工工艺方案,采用专用的步履式顶推设备完成主桥整体顶推施工。在顶推施工时加设钢管桁撑结构,确保了顶推时桥梁受力满足要求。施工过程中采用变竖曲线顶推施工工艺,通过初始标高优化和设备改进,优化并确定了临时墩标高;采用导梁上墩技术和到位设备的适用性技术改进了施工工艺,达到了减少成本、提高安全性的目的。实践表明,该顶推施工技术确保了施工过程的安全性,成桥后的线形满足要求。
[Abstract]:The main bridge of Lanzhou Shenan Yellow River Bridge is a through steel arch composite beam bridge with a main span of 156m. The main beam is an equal-section steel-concrete composite beam. The total weight of the main bridge is about 4000t. As well as the difficulty of construction on channel and traffic, the construction technology scheme of steel arch beam is designed, and the whole pushing construction of main bridge is completed with special step type pushing equipment, and the steel pipe truss bracing structure is added in the construction of steel arch beam, and the steel pipe truss bracing structure is added in the construction of steel arch beam. In the process of construction, variable vertical curve is used to push the construction technology, through the initial elevation optimization and equipment improvement, the temporary pier elevation is optimized and determined. The construction technology is improved by using the technology of upper pier of guide beam and the applicability technology of equipment in place. The purpose of reducing the cost and improving the safety is achieved. The practice shows that the jacking construction technology ensures the safety of the construction process. The alignment of the bridge meets the requirements.
【作者单位】：宏润建设集团股份有限公司;
【分类号】：U448.216;U445.462

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