摘要
Abstract
In bridge engineering,temporary piers can reduce the standard span of jacking,so as to reduce the alternating positive and negative moment in the process of beam jacking.At present,there is little research on the design ideas and calculation methods of temporary piers in the field of bridge jacking construction.In this paper,according to an engineering example,the force of the temporary support is calculated based on the finite element software Midas.According to the calculation results,the following conclusions are drawn:The maximum displacement at the top of the temporary support is 12.27 mm,吟u/h=1/1222＜1/550,the maximum stress ratio of the supporting column is 0.39,the maximum stress ratio of the short column is 0.17,the maximum stress ratio of the cushion beam two is 0.33,and the maximum stress ratio of the cushion beam three is 0.30.The maximum calculated reinforcement ratio in the foundation is 0.095 3%,all directions are reinforced according to the structure,and all calculation indexes meet the requirements of the code.关键词
顶推施工/临时支架/数值分析/工程实例/MidasKey words
jacking construction/temporary support/numerical analysis/engineering example/Midas分类
交通工程
