【作者】 赵冉；

【导师】 何雄君； 姚星宇；

【作者基本信息】 武汉理工大学 ， 交通运输工程， 2011， 硕士

【摘要】 随着多年桥梁建设经验的积累,高桩承台深水墩连续刚构桥的施工工艺已逐渐成熟。但是由于其复杂性,在施工过程中并非只有适合各种不同结构形式桥梁的施工工艺这么简单,同时还需要辅佐于桥梁施工监控才能保证桥梁施工以整体安全的施工体系。本文主要以河南小三峡大桥的实际施工为基础,研究以整个高桩承台深水墩桥梁的施工工艺,主要包括钻孔灌注桩的施工工艺、承台的施工工艺、墩身的施工工艺以及箱梁的施工工艺。而这其中高桩基础主要考虑的是钻孔工艺以及水下施工的要点,承台部分则主要结合高桩承台的特点进行研究,深水墩的工艺同样是需要考虑一部分在水中施工的影响,箱梁部分则主要是围绕挂篮的设计以及施工流程进行研究。采用MIDAS软件建模进行结构设计、分析与计算,目的是得出箱梁整体线型的预拱度以及应力应变状况。在得到多个施工预拱度调整值之后,本文通过研究已有多年研究成果的灰色预测理论,并利用改进后具有高精度的非等间距NGM(1,1)模型成功对项目桥梁的下一节段悬浇箱梁底板前端立模标高误差进行预测。从而对桥梁进行线型控制。线型控制的主要目的便是保证连续刚构桥结构最为关键的控制因素——整桥线形误差在允许规定范围内,并结合监测结构内部应力的发展趋势,保障施工的顺利安全、有质量的进行。而对箱梁底板前端立模标高误差的预测更是提高了灰色预测理论在连续刚构桥梁线型控制领域的应用能力。本文主要探讨了河南小三峡大桥的施工工艺以及在线型控制中的灰色预测理论。重点强调了两者在高桩承台深水墩连续刚构桥的施工中的必要性和可行性。通过对河南淅川小三峡大桥成功的实际应用,在此方向中所获得的相关经验可应用于其他类似研究方向上,为同类高桩承台深水墩连续刚构桥工程施工工艺及线型控制工作中提供参考帮助。更多还原

【Abstract】 As the accumulation of the bridge construction experience, the construction technic standard of continuous rigid frame bridges with piers of high pile bearing platform in deep water has been developed. Due to its complicacy, during work progress of the various bridge versions, it’s not only need the different construction technology to accommodate; but also need to apply the construction monitor in the meantime, so that it can provide the bridge construction with an entire and safe construction system. This paper is chief based on He-Nan-Xiao-San-Xia bridge’s practical construction to study the construction technics of bridges with piers of high pile bearing platform in deep water. Include the construction technics of cast-in-situ bored pile; the construction technics of the bearing platform; the construction technics of piers body and the box-girder. In those parts, the high pile foundation mainly considers the drilling technology and construction under water, the part of platform mainly talk about the feature of the high piles, the piers also need to consider the construction under water, and the box girder part mainly studys around the design of the cradle and construction process.Using the software MIDAS to build model and commit structural design, analysis and compute. And then getting the He-Nan-Xiao-San-Xia bridge’s theoretical camber and states of the stress and strain. After getting several camber adjustment data, this paper through studying the gray prediction theory which is full of research finds in recently years and taking advantage of an improved non-equal gap NGM(1,1) model which has a high-precision, is successful to predict the next cantilever casting box girder section formwork baseboard elevation data error. it can make sure the whole bridge’s linetype error which is the key monitor work in the whole continuous rigid frame bridge structure in allow prescribed scope, and monitor structural inside stress’s development tendency, finally, to reach the purpose which guarantees the whole bridge construction proceed smoothly、safely and quality. And the prediction of cantilever casting box girder section formwork baseboard elevation data can enhance the gray prediction theory’s ability of application in the continuous rigid frame bridge’s linetype control.This paper mainly discusses the two parts of the He-Nan-Xiao-San-Xia bridge, the one is the construction technology and the gray prediction theory beam bridge’s linetype control. It emphasizes that the two parts have their necessity and feasibility during the construction of continuous rigid frame bridges with piers of high pile bearing platform in deep water. Considering the He-Nan-Xiao-San-Xia bridge’s successful application experience, other similar study can use this experience if it’s necessary, and also give the work of the same type continuous rigid frame bridges with piers of high pile bearing platform in deep water engineering construction technology and linetype control a helpful reference.更多还原