摘要
钢筋混凝土箱型拱桥在无支墩拱式拱架上现浇施工时,若跨度较大,拱圈一般采用分环分段的施工方法。采用该方法施工时,先期形成的混凝土拱环与拱架的横向联合作用明显。通过两种分环方案的对比分析发现,不同的分环方案横向联合作用强度也有所差别。采用一个最优分环方案,可以利用已形成的拱环与拱架在横向的联合作用,增加横向刚度,有利于提高施工过程中的横向稳定性。
When we built reinforce concrete box arch bridge with the method of cast-in-place construction on arch centering, we usually divided arch ring into several layers and segments to construct. When used this method, we could found the lateral consociation function was significant. According to comparison and analysis of two construction schemes of concretion layer by layer , we can find the lateral consociation function was different. Thus, one optimum scheme can be used to utilize the consociation function of arch ring and arch centering to increase lateral stiffness, consequently to enhance lateral stability during construction.
出处
《交通科技与经济》
2008年第4期6-7,共2页
Technology & Economy in Areas of Communications
关键词
钢筋混凝土箱形拱
拱架
分环施工
横向刚度
RC box arch
arch centering
concretion layer by layer
lateral stiffness
