【摘要】 钢筋混凝土拱桥拱箱在无支墩拱架上现浇施工时,对裸拱架和已形成部分拱环2个阶段分别进行了流水压力静力计算、自振特性分析和屈曲分析,表明先期形成的拱环与拱架的横向联合作用明显。对先形成2个边箱和先形成底板及部分腹板2种分环方案进行了比较,发现分环方式不同,其横向联合作用的强弱也有差别,后者要优于前者。选择合理的分环方式并利用已形成的拱环与拱架的横向联合作用,可以有效提高施工中拱架的横向稳定性。更多还原

【Abstract】 The analysis of water pressure,free vibration and buckling of bare arch centering,and arch ring with concrete layer was addressed for the box arch ring of the reinforced concrete box arch bridge built with the construction method of cast-in-place on arch centering.The result indicates that the lateral consociation of arch centering with the arch ring with concrete layers is evident.There were two construction schemes of concreting layer by layer.The one was to form two side boxes firstly,another to form bottom slab and partial web firstly.By comparison of them,it is found that the lateral consociation is different and the latter one is stronger.Thus,the lateral stability of arch centering during construction can be improved effectively by the reasonable scheme of concreting layer by layer and utilization of lateral consociation.更多还原