超宽桥面双提篮梁拱组合桥梁总体设计

Master Design of Super Wide Deck Double-X-shaped Beam Arch Combined Bridge

梁拱组合桥梁作为一种新颖的结构体系,在一定跨度范围之内具有很强的竞争力。对某主跨80 m、单幅宽度达45 m的连续梁拱组合桥梁进行了总体设计研究。为达到安全、经济、美观等设计目标,同时考虑到本桥长宽比较小、城市综合管沟需穿过主梁等特殊设计情况,采用双提篮拱、单箱多室结构(中间箱室兼作管沟通道)。通过结构构造和施工措施,实现其受力合理性;通过三维空间分析,对结构的受力和安全性进行论证,为同类桥梁的设计积累一定经验。

As a new structural system, the beam-arch combined bridge has the great competitive power in some range of span length. The article studies the master design of a continuous beam arch combined bridge with the 80-m main span and 45-m width. In order to reach the aim of safety, economy and beauty, and also to consider the special design conditions of smaller length-width ratio of this bridge and the urban engineering tunnel required to cross the main beam, the double-X arch and single-box multi-cell structure is used(the middle box cell as for the pipe channel). The structure construction and construction measures can realize its stress rationality. The three-dimensional space analysis demonstrates the structural stress and safety, which can accumulate the experience for the design of the similar bridges.