王晓明, 雷晓鸣, 王成树, 徐元孝. 空间索形悬索桥主缆线形施工过程空间转换控制方法[J]. 工程力学, 2017, 34(4): 187-195. DOI: 10.6052/j.issn.1000-4750.2015.11.0902
引用本文: 王晓明, 雷晓鸣, 王成树, 徐元孝. 空间索形悬索桥主缆线形施工过程空间转换控制方法[J]. 工程力学, 2017, 34(4): 187-195. DOI: 10.6052/j.issn.1000-4750.2015.11.0902
WANG Xiao-ming, LEI Xiao-ming, WANG Cheng-shu, XU Yuan-xiao. SPATIAL TRANSFORMATION CONTROL METHOD OF MAIN CABLE ALIGNMENT DURING CONSTRUCTION PROCESS IN SUSPENSION BRIDGE WITH SPATIAL CABLES[J]. Engineering Mechanics, 2017, 34(4): 187-195. DOI: 10.6052/j.issn.1000-4750.2015.11.0902
Citation: WANG Xiao-ming, LEI Xiao-ming, WANG Cheng-shu, XU Yuan-xiao. SPATIAL TRANSFORMATION CONTROL METHOD OF MAIN CABLE ALIGNMENT DURING CONSTRUCTION PROCESS IN SUSPENSION BRIDGE WITH SPATIAL CABLES[J]. Engineering Mechanics, 2017, 34(4): 187-195. DOI: 10.6052/j.issn.1000-4750.2015.11.0902

空间索形悬索桥主缆线形施工过程空间转换控制方法

SPATIAL TRANSFORMATION CONTROL METHOD OF MAIN CABLE ALIGNMENT DURING CONSTRUCTION PROCESS IN SUSPENSION BRIDGE WITH SPATIAL CABLES

  • 摘要: 由于空缆与成桥的横向坐标相差很大,空间索形悬索桥主缆在施工过程的线形转换直接决定着吊索能否安装与其弯折损伤程度。通过分析典型工程的横向偏位与偏角,揭示了不同桥型空间转换的作用与对策;分析指出不同工法的吊索横向偏角差异,并给出计算公式。提出临时缆间横撑法,发明缆间横撑装置和配套索夹,有效解决了一座“先缆后梁”法施工的空间索形悬索桥的主缆线形转换及吊索安装问题。工程应用和算例分析表明,该文方法适用于“先梁后缆”法和“先缆后梁”法;施力效率高,安全余度大,安装一次到位无需中间调整,不会制约和影响施工工序的制定;对吊点提供刚性约束,对横向偏位与偏角的控制效果更好,有更大的安全余量容许施工误差,能够适应复杂现场常需的工序中途调整,可施工性更强。

     

    Abstract: Due to large lateral deviation between the free cable state and the finished bridge state, the alignment transformation of spatial cable suspension bridges during construction directly affects the installation and extent of buckling damage in the hangers. Through the analysis of the lateral deviation and drift angle in a typical project, the effects of and strategy for alignment transformation in different bridges are revealed. Computational formulae are provided to represent the lateral drift angel of hangers in different working conditions. A new method, named temporary lateral bracing between cables, is proposed, and its corresponding devices and clips are invented. This method effectively solves the alignment transformation and hanger installation problems in a spatial cable suspension bridge which occur in the “erecting girder after constructing cable” construction method. Engineering application and numerical analysis show that the proposed method can be applied in both “erecting girder after constructing cable” method and “erecting girder before constructing cable” method, and its advantages include high efficiency and large safety redundancy. It can be installed in place without adjustment, does not restrict or affect the development of the construction process, provides a rigid support to the lifting point, offers a better control of drift angle, has a greater safety margin for construction error, is adaptive to the complex adjustment in the process, and is easy to implement.

     

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