杨高南路高架桥跨外环南河桥墩保护研究

Protection of Bridge Piers of Yanggao South Road Viaduct over Nanhe River

外环南河开挖河道,横穿杨高南路高架桥,对桥墩的受力产生不利影响。因此,对桥墩保护方案进行研究。采用定性与定量分析方法,对河道开挖前、后两种状态进行受力分析,针对河道中的2个桥墩基础采用扩大原有承台,增加钻孔灌注桩的方式;岸上的2个桥墩采用混凝土搅拌桩加固土体的方式,对桥墩基础进行加固保护。通过以上方法使桥梁结构在河道开挖后,性能达到安全可靠。

The excavation of the outer nanhe river and the crossing of the Yanggao South Road viaduct have a negative effect on the stress of the bridge piers.Therefore,the pier protection scheme is studied.Qualitative and quantitative analysis methods are used to analyze the forces in the two states before and after the river excavation.For the two bridge pier foundations in the river,the method of enlarging the original cap and adding bored piles is adopted.The two piers on the shore are reinforced and protected by concrete mixing piles.Through the above methods,the bridge structure can achieve safe and reliable performance after river excavation.