不等跨连续刚构桥总体设计

Overall Design of Continuous Rigid Frame Bridge with Unequal Span

由于设计、施工的复杂性,不等跨连续刚构桥在实际工程中应用较少。墨临高速澜沧江特大桥主桥为(57+140+180+140+57)m不等跨预应力混凝土连续刚构桥。本文首先从方案比选到主桥设计,介绍本桥的设计思路及关键技术。其次对主桥进行静力计算和地震计算,结果表明:本桥各项指标均满足规范要求,并留有适当的安全储备。最后,结合本桥实例,对设计和施工的良性互动提出建议。

Due to the complexity of design and construction,unequal-span continuous rigid frame bridges are rarely used in actual projects.The main bridge of the Lancang River Bridge on Molin Expressway is a(57+140+180+140+57)m unequal-span prestressed concrete continuous rigid frame bridge.Firstly,the design ideas and key technologies of this bridge from the comparison and selection of schemes to the design of the main bridge are introduced.Secondly,the static calculation and seismic calculation of the main bridge are carried out.The results show that all the indicators of this bridge meet the requirements of the specification,and proper safety reserves are reserved.Finally,combined with the example of this bridge,suggestions are made for the benign interaction between design and construction.