连续刚构桥空心薄壁墩布置研究

Study on the Layout of Thin-wall Piers of Continuous Rigid Frame Bridge

我国西南地区地质地形情况十分复杂,多崇山峻岭、深谷沟壑。在此修建高速公路,大跨径、高墩桥梁占比较大,当墩高大于40m后多采用空心薄壁形式。为增强其高墩稳定性,设计中常在一定的位置设置横隔板。横隔板的设置会造成施工周期延长,因此需要合理进行横隔板的布置。针对芷江至铜仁(湘黔界)公路拖冲特大桥连续刚构,进行横隔板优化布置分析,为山区高墩横隔板的布置提供参考经验。

The geological topography of southwest China is very complex,with many mountains,deep valleys and ravines.In the construction of highway here,the bridge with long span and high pier accounts for a large proportion,when the pier is taller than 40m,the hollow thin-walled form is mostly adopted.In order to enhance the stability of the high pier,the diaphragm is usually set at a certain position in the design.The installation of diaphragm will prolong the construction period,so it is necessary to properly arrange the diaphragm.In view of the continuous rigid frame of Zhitong high-speed towing bridge,the optimized layout of diaphragm is analyzed to provide reference for the layout of high pier diaphragm in mountainous areas.