Abstract: Taking Zhaohua Jialing river long-span stiff skeleton concrete arch bridge in construction as the research object， Midas Civil 2010 is used to build the beam-plate combination finite element model of arch box． The construction process of outsourcing concrete is calculated and the influence to the force and deflection of stiff skeleton arch bridge is investigated by different pouring scheme． And the stability of the construction process is also taken into consideration，which provides reference for the same kind of bridge construction．

Key words: long-span stiff skeleton concrete arch bridge, outsourcing concrete construction, pouring scheme, construction stability

摘要： 以在建昭化嘉陵江大跨劲性骨架拱桥为研究对象，采用Midas Civil 2010 建立拱箱的梁－ 板组合有限元模型， 对该桥的外包混凝土施工过程进行计算，探讨不同的浇注方案对劲性骨架拱桥的受力及挠度的影响，并考虑施工过 程中的稳定性，为同类型桥梁施工提供参考和借鉴。

关键词: 大跨劲性骨架拱桥, 外包混凝土施工, 浇注方案, 施工稳定