关于优化大跨度连续梁支架体系的探讨研究

Research on Optimizing Long-span Continuous Beam Support System

高速铁路大跨度连续梁0#块高度较高,重量较大,大多采用支架现浇的形式。文章结合新建福厦铁路东孚特大桥(70+125+70)m连续梁的实际情况,针对大跨度连续梁0#块支架体系既有常规方案进行合理优化,把墩外临时固结钢管混凝土支墩与支架钢管柱巧妙结合,通过Midas程序整体建立模型,对优化后的支架体系进行检算,同时简述实际施工情况。实践证明优化后的支架体系具有节省材料、提高功效等优点,对今后大跨度连续梁支架体系施工具有一定指导意义。

The high-speed railway large-span continuous beam 0#block has a high height and a large weight,and most of them adopt a cast-in-place support form.Based on the actual situation of the(70+125+70)m continuous beam of the newly built Dongfu Super Bridge on the Fuzhou-Xiamen Railway,the article rationally optimizes the existing conventional schemes of the large-span continuous beam 0#block support system.In this paper,the temporary consolidated concrete-filled steel tube buttress outside the pier is cleverly combined with the support steel tube column,and the overall model is established by Midas program to check and calculate the optimized support system.At the same time,the actual construction situation is briefly described.The practice shows that the optimized support system has the advantages of saving materials and improving efficiency,which has certain guiding significance for the construction of long-span continuous beam support system in the future.