Analysis of the influence of the new railway bridge diagonally crossing the existing high-speed railway on the pier foundation of the high-speed railway
In order to study the influence of the new railway bridge passing under the existing high-speed railway at a small angle on the pier foundation of the high-speed railway,a three-dimensional finite element model of the new railway bridge crossing the existing high-speed railway under the background of the new Lu'an railway continuous rigid bridge crossing the existing Anqing branch bridge interchange project was established,and the MIDAS-GTS NX software was used to es-tablish a three-dimensional finite element model of the new railway bridge passing through the existing high-speed railway.The results show that:The cast-in-place support is used for the construction of the existing high-speed rail underpass pro-ject,and the stratum near the existing high-speed railway is disturbed in a large area during the bracket preloading stage,and the high-speed rail pier foundation is subjected to additional loads,which has a great impact on the deformation of the pier foundation;The existing operating high-speed railway is crossed diagonally at a small angle,and the horizontal de-formation of the high-speed rail pier is greatly affected because the new project is close to the existing high-speed rail foun-dation;Effective protective measures should be taken for the construction of foundation pits adjacent to the existing high-speed railway,which can significantly reduce the impact of new projects on the railway;The bearing capacity of the exist-ing high-speed railway pier pile foundation will be increased by the new underpass project,and the foundation bearing ca-pacity can be improved through effective measures for the design of railway bridges with planned underpass projects;The deformation of the existing high-speed rail bridge foundation has a dynamic cumulative effect in the construction process of the new underpass project,and the monitoring of the deformation of the existing high-speed rail pier foundation should be strengthened during the construction period to ensure the safety of the existing high-speed railway.
new railwaysnumerical simulationhigh-speed rail bridgesdiagonal crossing at a small angledisplace-ment deformationbearing capacity of pile foundation
万方数据
维普
