可展桥的应用和发展

Application and Development of Deployable Bridge

为保证桥梁新建和改建时交通运输通畅,急需一种能在短期内通过快速施工建成满足使用要求的桥梁,可展桥能满足该要求。可展桥桥身采用特殊的结构形式,在工厂内制作完成,经合龙、折叠运送至现场后,只需伸展桥身,再以自锁及其它紧固措施加强节点,即可快速实现从机构向结构的转变以承担荷载,满足通行要求。国内、外对可展结构及可展桥都进行了一定的研究,并有实桥建成。建议积极开发新型的可展桥结构形式及新材料;开展针对可展结构体系的研究,提出一套完整的分析、计算、设计方法,并掌握可展桥施工的配套技术。

To ensure the unimpeded flow of traffic when a new bridge is built or an existing bridge is undergoing renovation, a kind of bridge which can be built within a short period through rapid construction as well as meet the service requirements is in urgent need. From this perspec tive, the deployable bridge is an applicable option. The body of the deployable bridge is a special structure, which is fabricated in the workshop. Once finished, the bridge structure is closed and folded for the convenience of transportation. At the bridge site, the bridge structure is, first of all, spread out, and then, the selflocking and other tightening measures are used to strengthen the panel points, thereby, the transformation from individual components to a systematic structure which is able to bear loads and meet the service requirements is rapidly realized. Relevant studies have been done on the deployable structures and deployable bridges at home and abroad, and there have been real bridges completed. It is suggested that further efforts be made to develop new de ployable bridge structures and new materials, carry out research on the deployable structural sys tem, put forward a complete set of analysis, calculation and design methods and master the con struction techniques for deployable bridges.