不等跨混凝土连拱桥主拱圈支架拆除技术

连云新城泻湖大桥是建造在淤泥质软土地基上的14跨跨径渐变连续拱桥，拱桥采用满堂支架法施工。工程地质条件较差，主拱圈支架拆除时由于跨径不等会导致桥墩处产生不平衡力，这将影响桥墩的安全与质量。通过分析主拱圈的支架拆除顺序对拱圈和支座处的内力和变形的影响，确定不等跨连续拱桥较为合理的支架拆除方案，并通过过程监测得到了验证。

Technique on bearer demolition of main arch ring for fanging across concrete multiple arch bridge

Fourteen span of gradually varied span continuous arch bridge is constructed on the silt soft soil foundation for the Xiehu Bridge of Lianyun new city, used the support construction method for arch bridge. The engineering geological condition is poor, due to unequal span, bearer demolition of the main arch ring is generated unbalanced force for bridge pier, affected the safety and quality of the piers. Based on the analysis of the main arch ring support dismantling sequence of arch ring and bearing the influence of the internal force and deformation, is determined the reasonable bearer demolition solution of unequal span multiple arch bridge and get the verification through process monitoring.