拓宽改建桥梁对老桥下部结构的影响分析

老桥拓宽施工会对老桥产生一定影响。介绍了上海浦东内环线工程在南浦大桥浦东主引桥拓宽改建时,新老桥下部结构间的数值影响分析,并与后期监测数据进行了分析对比。结论认为通过一定措施,新桥结构施工及运营对老桥结构影响较小,并控制在允许范围内。其经验可供类似工程借鉴。

On Influence Analysis of Old Bridge Substructure during Broadening & Rebuilding Bridge

Old bridge broadening construction will always bring influences on itself.With the background of Shanghai Pudong Inner-ring project,broadening & rebuilding of Pudong main approach of Nanpu Bridge,numerical influence analysis on old & new bridges’ substructures is introduced in this paper,and then,the analyzing results are compared with the monitoring data in later stage.The conclusions show that structure construction & operation of new bridge brings little influence on the structure of old one by means of some measures and the little influence can be controlled within allowed limits.Its experience can be learned for other similar projects.