空间索形悬索桥主缆线形施工过程空间转换控制方法

发布时间：2018-07-27 11:00

【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 the large difference between the transverse coordinates of the air cable and the bridge, the linear transformation of the main cable in the construction process of the space cable suspension bridge determines whether the cable can be installed and the degree of the bending damage directly. By analyzing the lateral deflection and the deflection angle of the typical project, the effect and Countermeasures of the different bridge type space conversion are revealed, and the sling of different work methods is analyzed. The lateral deflection difference and the calculation formula are given. A temporary cross brace method is put forward, the inter cable cross bracing device and the supporting cable clamp are invented, which effectively solves the problem of the line transformation of the main cable and the installation of the sling for a space cable suspension bridge constructed by the "first cable and rear beam" method. The cable rear beam "method: high efficiency, high safety redundancy, no intermediate adjustment, no restriction and influence on the construction process, it provides rigid restraint to the hanging point, better control effect on lateral deviation and deflection angle, and has greater safety allowance to allow construction error, and can adapt to the middle course adjustment of complex field often needed." The construction is stronger.
【作者单位】：长安大学桥梁工程研究所;旧桥检测与加固技术交通行业重点实验室;浙江省交通规划设计研究院;中交二航局第二工程有限公司;
【基金】：国家自然科学青年基金项目(51308055) 教育部高校博士新教师基金项目(20130205120001) 中国博士后科学基金项目(2013M532000)
【分类号】：U448.25

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