邵阳市桂花大桥钢箱梁顶推及缆索架设施工控制技术研究

发布时间：2018-01-14 16:28

本文关键词：邵阳市桂花大桥钢箱梁顶推及缆索架设施工控制技术研究　出处：《中南林业科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：本文以邵阳市桂花大桥为工程背景,对自锚式悬索桥钢箱梁顶推及缆索架设施工工艺关键技术和施工控制进行研究,为顺利完成该桥的建设任务提供了技术支持,并取得了具有一定实用工程应用价值的研究成果,为同类桥梁的建设提供参考。具体内容如下:(1)介绍了自锚式悬索桥的国内外发展历史,总结了自锚式悬索桥主梁顶推法施工以及主缆架设等已有的研究成果。(2)通过桥梁施工控制的基本理论和基本方法的讨论,比较分析各自的优缺点。为邵阳市桂花大桥钢箱梁顶推施工控制提供理论依据。(3)以邵阳市桂花大桥为工程背景,对钢箱梁顶推施工进行仿真分析,并采用BP神经网络法对钢箱梁顶推施工过程进行状态预测。通过对现场实测数据进行分析,结果表明:实测结果与预测结果是十分接近的。为钢箱梁顶推施工顺利完成提供了技术保障。(4)以主缆架设为研究对象,采用分段悬链线法对主缆进行计算分析得到成桥状态主缆线形。采用桥梁专用分析软件进行仿真模拟,得到成桥状态主缆线形。并做了如下三个方面的控制:①主缆的无应力长度控制。②索鞍的预偏量控制。③基准索股架设的控制。通过主缆架设现场控制情况及实测结果表明:分段悬链线法和有限元仿真分析以及缆索线形实测控制结果,三者线形一致且比较接近。
[Abstract]:Taking Shaoyang Guihua Bridge as the engineering background, this paper studies the key technology and construction control of steel box girder pushing and cable erection of self-anchored suspension bridge. It provides technical support for the successful completion of the bridge construction task, and has achieved a certain practical engineering application value of the research results. The concrete contents are as follows: 1) the development history of self-anchored suspension bridge at home and abroad is introduced. The basic theory and method of bridge construction control are summarized in this paper, such as self-anchored suspension bridge main girder jacking construction and main cable erection. Comparative analysis of their advantages and disadvantages. For Shaoyang Guihua Bridge to provide a theoretical basis for the construction control of steel box girder jacking construction, Shaoyang Guihua Bridge as the engineering background, the steel box girder jacking construction simulation analysis. The BP neural network method is used to predict the state of the steel box girder jacking construction process, and the field measured data are analyzed. The results show that the measured results are very close to the predicted results. It provides a technical guarantee for the successful completion of the pushing construction of the steel box girder. (4) the main cable erection is taken as the research object. The main cable is calculated and analyzed by the method of segmental catenary, and the main cable shape of the bridge is obtained. The simulation is carried out by using the special analysis software for the bridge. The main cable shape of the bridge is obtained, and the following three aspects of control are done:. 1. The unstressed length of the main cable is controlled by the pre-deflection of the cable saddle .2 the control of the erection of the base cable strands is controlled by the pre-deflection of the cable saddle. 3. Through the field control of the main cable erection and the measured results, it is shown that:. Segmented catenary method and finite element simulation analysis, as well as cable line measurement control results. The three lines are consistent and close.
【学位授予单位】：中南林业科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U445.4

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