In order to solve the problem of excessive loss of cantilever prestress in long-span prestressed bridge engineering,the con-struction technology of cantilever casting with hanging basket in long-span prestressed bridge engineering is studied.According to the construction situation of Guanmenjiang Waterway Bridge project,the concrete application of cantilever casting construction technology in long-span bridge engineering is analyzed,including hanging basket manufacture and the installment,the template splicing,the con-crete pouring,the cantilever pile prestress tensioning and so on.The results show that the maximum displacement of formwork is 4.2 mm at the testing point,the secondary surface recovery treatment is completed by concrete pouring,and the prestressing force of single cantilever pile is 5 000 kN.It is shown that the close connection of formwork,uniform and dense concrete pouring,and good load bearing effect of prestressing result bearing can effectively solve the cantilever prestressing loss.
关键词
大跨度预应力桥梁/挂篮悬臂/混凝土浇筑
Key words
long span prestressed bridge/hanging basket cantilever/concrete pouring
维普
万方数据