山区悬索桥轨索滑移法施工的关键技术及其装置研发

针对山区的特殊建设条件,提出了悬索桥主梁架设的轨索滑移法施工技术。该方法是利用悬索桥主缆和吊索作承重结构,吊索下端连接吊鞍,吊鞍上支承轨索,利用在轨索上运动的运梁小车输送节段梁,待到达安装位置后,借助缆载吊机进行垂直吊装和安装。以矮寨特大悬索桥施工为背景,介绍了轨索滑移法架梁系统的组成和关键技术,以及核心组件吊鞍、运梁小车和轨索系统等的结构设计和计算分析。对整个架梁系统,介绍了整体缩比模型试验和足尺模型试验的试验方法和试验结果,并总结了实际工程应用情况。通过模型试验和工程应用的研究结果表明:轨索滑移架梁法能快速实现悬索桥的主梁架设,并具有很好的安全性和经济性,具有广阔的应用前景。

Research and development of key technology and device of railway cable slip method construction of suspension bridge in mountainous area

According to the special construction conditions of mountain area, the construction technology of the main beam erection of suspension bridge by rail cable slip method is put forward. In this method, the main cable and sling of the suspension bridge are used as the load-bearing structure, the lower end of the sling is connected with the sling saddle, the sling is supported on the rail cable, and the section beam is transported by the beam carriage moving on the rail cable. After reaching the installation position, the cable load crane is used for vertical hoisting and installation. Based on the construction of Aizhai super-large suspension bridge, the paper introduces the composition and key technology of the beam erection system with rail cable slip method, and the structural design and calculation analysis of the core components, such as the saddle, beam carriage and rail cable system. The test methods and results of the whole scale model test and full scale model test for the whole beam frame system are introduced, and the practical engineering application is summarized. The results of model test and engineering application show that the rail cable sliding frame beam method can quickly realize the erection of the main beam of the suspension bridge, and has good safety and economy, and has a broad application prospect.