奉节梅溪河钢管砼拱桥设计与施工要点

The Design and Construction Key Point of the Steel Pipe Concrete Arched Bridge over River Meixi in Fengjie Countryside

奉节梅溪河大桥是主跨为288 m的上承式钢管砼拱桥,利用电算程序进行了由成桥状态反推到施工初始状态。以及由施工初始状态到成桥状态的施工控制过程的演绎,并对影响成桥状态主拱内力与线形的主要因素进行了有效的控制。此外,采用水平桩与竖向桩组合的桩基,可对卸荷裂缝较发育的拱座山坡地基进行有效地处理。

The bridge over the River Meixi in Fengjie country - side is a up beared steel pipe concrete arched bridge with its main span length is 288 metres. On the one hand, Aetioporphyrin text comendiums the declution course from the status of formulating the bridge to the status at the beginning of the construction, and beginning to formulating the bridge. At the same time. It compendiums the main agent and the control resource which effect the inner force of the main arch and the wire shape when formulating the bridge during the construction course. Mabe sure that the inner force and the wrie shape confom the design solicit. On the other hand, as a bridge with buck towing force, the arch mount and its foundation is 'the Pillar stones'. The load capacity in the bridge will finally be passed to the foundation through the arch mount, because the arch mount is placed on the back falls where are rich in breaking joint of unload the Benelux. Aetioporphyrin compendiums the treating device of the arch mount foundation in special geology on a big span length arched bridge.