Study On Differential Settlement Remediation Of Ballastless Track On Bridge For High Speed Railway By Using Jack-up Bedding Method

High-speed railway is an important sign of railway modernization.Because of the various structure types,the difficulty to solve the settlement problem of has futher intensified.To establish an accurate and efficient finite element model,this paper takes Wuqing settlement zone in Beijing-Tianjin intercity high-speed railway as engineering background.The research of differential settlement remediation practice of bridge was carried out.The main contents of this paper are described as follows:(1)Based on investigated the relevant domestic and foreign literatures,high-speed railway,rallastless track,brige settlement and jack-up were overviewed,the simulation methods of brige of high-speed railway and rallastless track were conclued.(2)Based on a practical engineering,the effects of differential settlement and jack-up on the structure were studied,and the stress characteristics of girder and upper track structure were analyzed.(3)On the basis of measured differential settlement,a reasonable construction scheme of jack-up was formulated in order to ensure construction safety and to restore the comfort.(4)Through a full set of comprehensive and reliable monitoring system,the stress characteristics of girder and upper track structure on high-speed railway rallastless track were monitored in real time.