顶推法施工自锚式悬索桥关键技术与控制

发布时间：2018-06-04 18:22

本文选题：自锚式悬索桥 + 顶推法施工　；参考：《沈阳建筑大学》2015年硕士论文

【摘要】：近几年来,随着自锚式悬索桥越来越广泛地应用,特别是在我国,自锚式悬索桥更是受到了许多工程师的青睐。自锚式悬索桥之所以得到了大力推广,主要是因为该类桥具有美观的桥型；在其适用的跨径范围内,建造的工程费用相对其他桥型而言更低廉。然而,自锚式悬索桥的施工控制理论和技术相对比较薄弱,有关这方面的研究在国内外还比较少,现有的理论、设计方法和施工都还有待在实践工程中去检验、提取、归纳与总结,从事这方面的研究工作无疑是很有意义的。本文结合潮白河自锚式悬索桥的施工过程,对其施工中的关键技术和施工控制进行了研究,取得了具有实用价值的研究成果,为潮白河自锚式悬索桥的顺利建成提供了技术支持。(1)详细介绍了顶推法施工的分类,顶推施工过程中的临时设施以及顶推法施工的优缺点。潮白河大桥的钢箱梁采用顶推法施工,钢箱梁在顶推过程中的动态应力监控结果与理论值较为吻合,应力没有超过设定预警值。钢箱梁顶推就位后,钢箱梁静态应力监测结果显示,顶推到位后钢箱梁应力较小,在安全范围内。临时墩及顶推平台位移监测结果显示,4#临时墩存在顶推过程中位移超出预警值情况,经调整能够满足安全要求。临时墩应力监测结果显示,临时墩处于压力状态。(2)详细介绍了自锚式悬索桥的受力特性、计算理论及施工控制方法。通过对潮白河大桥的上部结构施工监控,得出以下结论：桥塔下横梁受顶推施工影响较小,在后期监控中可适当放松对其监测力度。通过对潮白河自锚式悬索桥监测工况的加劲梁、桥塔下横梁等构件的施工控制方法以及应力、变形测试数据。结果表明潮白顶推法施工河自锚式悬索钢桥各部分在整个施工过程中状态控制良好,达到了预想的设计效果。
[Abstract]:In recent years, with the application of self-anchored suspension bridge more and more widely, especially in China, self-anchored suspension bridge is favored by many engineers. The reason why self-anchored suspension bridge is popularized is mainly because it has beautiful bridge type and the construction cost is lower than other bridges in the suitable span range. However, the construction control theory and technology of self-anchored suspension bridge are relatively weak, and the research on this aspect is still relatively few at home and abroad. The existing theories, design methods and construction have yet to be tested and extracted in practical engineering. Induction and summary, engaged in this area of research is undoubtedly very meaningful. Combined with the construction process of Chaobai River self-anchored suspension bridge, the key technology and construction control in its construction are studied in this paper, and the research results with practical value are obtained. This paper provides technical support for the successful construction of Chaobai River self-anchored suspension bridge. It introduces in detail the classification of jacking construction, the temporary facilities in the construction process and the advantages and disadvantages of the jacking construction. The steel box girder of Chaobaihe Bridge is constructed by pushing method. The dynamic stress monitoring results of the steel box girder in the process of pushing are in good agreement with the theoretical value, and the stress does not exceed the pre-warning value. The static stress monitoring results of the steel box girder show that the stress of the steel box girder is small and within the safe range. The displacement monitoring results of temporary pier and jacking platform show that the displacement of temporary pier exceeds the warning value in the process of pushing, and the adjustment can meet the safety requirements. The stress monitoring results of temporary pier show that the temporary pier is in the state of pressure.) the stress characteristics, calculation theory and construction control method of self-anchored suspension bridge are introduced in detail. By monitoring and controlling the superstructure of Chaobaihe Bridge, the following conclusions are drawn: the beam under the bridge tower is less affected by the jacking and pushing construction, and the monitoring intensity can be relaxed properly in the later period of monitoring. Through the construction control method and the test data of stress and deformation of the self-anchored suspension bridge in Chaobai River, such as stiffened beam, bridge tower beam and so on. The results show that every part of river self-anchored suspension steel bridge is well controlled in the whole construction process, which achieves the desired design effect.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.462

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