挂篮悬浇预应力混凝土箱梁设计与施工探讨

张河锦

摘要:

在我国80～150m跨径桥梁结构设计中,桥型较为丰富,有连续梁、拱桥、矮塔斜拉桥等,在此类跨径桥梁设计方案的选择时,主要结合桥址环境、工程造价、施工条件及景观协调性等方面,挂篮悬浇连续箱梁方案因其具有工艺成熟、整体性好、刚度大、外形简洁、造价较低等优点,目前仍然是众多项目优先推荐的方案。该方案虽然较为成熟,但是在设计细节及施工过程控制中依然存在值得探讨的地方,本文结合笔者设计的余梁公路北延工程兰江大桥案例,对此类桥梁的设计及施工要点进行探讨,可供同类型桥梁设计与施工参考。

Abstract:

In the structural design of 80-150m span bridge in China,there are rich bridge types,such as continuous beam、arch bridge、low tower cable-stayed bridge, etc,the selection of the scheme is mainly based on the bridge site environment, project cost, construction conditions and landscape coordination,continuous beam has the advantages of mature technology, good integrity, large stiffness, simple shape and low cost,at present, it is still the preferred scheme for many projects。Although the scheme is relatively mature,but in the design details and construction process control, there are still areas worthy of discussion,in this paper, the author designed the case of Lanjiang bridge in Yuliang highway north extension project,to explore the design and construction points of such bridges,it can be used as a reference for the design and construction of similar bridges。