摘要
前支点牵索挂篮在大跨径PC(预应力混凝土)斜拉桥中得到广泛应用,但其在山区空间受限的条件下难以进行拼装就位并与索塔、主梁及斜拉索互相干扰的问题较为突出。为解决神秘谷澜沧江大桥遇到的相关问题,通过采用结构适应性优化、有限元仿真分析等方法,对挂篮的结构设计及安装方法进行相关研究。结果表明,异型挂篮构造与挂篮拼装及主梁1#段现浇共用支架的方案场地适应性强,施工质量、安全、进度有保证,在山区PC斜拉桥施工中具有广泛推广价值。
The front fulcrum cable hanging basket is widely used in long-span PC(prestressed concrete)cable-stayed bridges,but it is difficult to assemble and put in place under the condition of limited space in mountainous areass,and the problem of mutual interference with cable towers,main beams and stay cables is prominent.In order to solve the related problems of mysterious valley bridge of Lancang River,research on the structure design and installation method of hanging basket through the methods of structure adaptive optimization and finite element simulation analysis.The results show that the special-shaped hanging basket construction combined with hanging basket and 1#section cast-in-site girder assembled shared stents scheme venues adaptable,guarantee the construction quality,safety,schedule,prestressed concrete cable-stayed bridge construction in the mountains of wide popularization value.
作者
张平
ZHANG Ping(Yunnan Railway Group Co.,LTD.,Kunming 650118,China;Civil Engineering College,Central South University of Forestry and Technology,Changsha 410004,China)
出处
《科技和产业》
2023年第2期276-286,共11页
Science Technology and Industry
关键词
受限空间
前支点挂篮
仿真设计
安装
restricted space
front fulcrum hanging basket
simulation design
installation
