上承式钢筋混凝土桁架拱桥主拱圈拆除方案

Demolishing scheme of main arch ring in deck-type reinforced concrete trussed arch bridge

针对广州增大桥旧桥结构特点,分析了大跨度钢筋混凝土桁架拱桥拆除过程中的施工难点,并从龙门吊和栈桥的施工、主拱圈拆除施工两方面对旧桥主桥的拆除方案进行了阐述,为同类旧桥拆除工程提供参考。

In light of the structural characters of old Zengbu bridge in Guanzhou, the author analyzes the construction challenges in the process of demolishing large-span reinforced concrete trussed arch bridge, and illustrates the demolishing scheme of old bridge＇ s main bridge from the construction of gantry crane and trestle and the demolishing of main arch ring, which to offer a reference for similar old bridge demolishing construction.