铁道标准设计2024，Vol.68Issue(6)：93-98,6.DOI:10.13238/j.issn.1004-2954.202210250011
郑济高铁济南黄河桥五塔部分斜拉桥设计关键技术研究
Research on Key Technologies for Design of Five-tower Partial Cable-stayed Bridge of Ji'nan Yellow River Bridge on Zhengzhou-Ji'nan High-speed Railway
摘要
Abstract
Partial cable-stayed bridges have the advantages of high rigidity,good economy and convenient construction.In recent years,they have been widely used in high-speed railway,but most of them are two-tower structures.In this paper,based on the main bridge of Ji'nan Yellow River Bridge on Zhengzhou-Ji'nan Railway,the structural system,side-to-middle span ratio and key parameters of beam-tower-cable are analyzed and studied for the long-span,five-tower,four-span and large-span partial cable-stayed bridge on high-speed railway.Through comprehensive comparison and study,the structure system of tower pier consolidation is selected for the Yellow River Bridge,which has the advantages of partial release of temperature force,bridge stiffness and track surface irregularity index to meet the requirements of ballastless track on high-speed railway.Vibration-reducing and isolation measures can be adopted for beam section,effectively reducing seismic force and improving overall economy of bridge.The main bridge uses a smaller ratio of mid-span at the edge to meet the requirement of no auxiliary span for flood control,and can effectively reduce the corner at the end of the beam,avoiding the increase of the investment of the whole bridge due to the use of large girder height.When the height of the tower is 38 m,the increase of the height of the tower can significantly reduce the internal force of the beam,but the deformation under temperature load will increase accordingly.Therefore,the selection of the height of the tower should take into account the structural forces and the requirements of track irregularity.AT-61 cable is used.Increasing cable size has little effect on bridge rigidity,but it can significantly reduce beam bending moment,but increase beam irregularity and residual creep deformation.关键词
高速铁路/铁路桥/部分斜拉桥/五塔斜拉桥/结构体系Key words
high-speed railway/railway bridge/partially cable-stayed bridge/five towers cable-stayed bridge/structural system分类
交通工程引用本文复制引用
张上,左家强,马辰龙..郑济高铁济南黄河桥五塔部分斜拉桥设计关键技术研究[J].铁道标准设计,2024,68(6):93-98,6.基金项目
中国铁路设计集团有限公司科技开发课题(2020YY240602) （2020YY240602）
