摘要
Abstract
In the complex urban environment,the jacking construction of frame bridge can effectively reduce the impact of the construction process on urban traffic,but also need to consider the impact of construction on existing pipelines and bridges.Based on a project example and Midas Civil finite element software,this paper puts forward a reinforcement scheme for existing lines before jacking construction in the case of complex urban pipelines running through railway,it provides reference for design of jacking construction scheme in complex urban environment.The results of finite element calculation show that the track is the most dangerous component under different working conditions,and its maximum bending stress and maximum shear stress are 37.4 N/mm2＜[σ]= 140 N/mm2 and 43.6 N/mm2＜[τ]= 80 N/mm2 respectively,which meet the requirements of relevant codes.At the same time,the deflection of each member is less than 1 cm,so there is no dangerous deformation.Based on the results of finite element analysis,it can be concluded that the reinforcement structure can guarantee the smooth construction.关键词
顶进施工/线路加固/工程实例/有限元计算/安全评估Key words
jacking construction/line reinforcement/engineering example/finite element calculation/safety evaluation分类
交通工程
