Construction Technology of Jacking Frame Bridge Beneath Multi Railway Lines at the Silty Soil Area with High Ground Water Level

Frame bridge is a common building facilities which can be used to substitute for the plane intersection between the railway and the highway or municipal road.Due to the advantages of simple structure,convenient construction,small impact to railway,low cost,safe and reliable when it is put into use,etc.,this structure has been adopted widely in practice.The frame bridge introduced in this paper is located in the silty soil area with high ground water level.During the jacking process of frame bridge,the main problem involved in this project is that there are multi railways lines should be crossed.What is more,the frame bridge is a long structure,which results in heavy weight and long jacking distance.Combined with this engineering example,this paper mainly illustrates the construction process and construction method of jacking frame bridge,which can also be referenced by other similar future projects.