Studies On Key Technology Of Construction And Control In High Speed Railway Continuous Beam Bridge

Qinhuangdao-Shenyang Passenger Dedicated Line,China's first high-speed railway,was put into use,which inaugurated an epoch for China's high-speed railway construction.Prestressed concrete continuous girder bridge because of its own force structure,mature technology and other advantages has become one of the most important type of high speed railway construction.Based on the engineering background of high speed railway continuous girder bridge of Shijiazhuang-Jinan passenger dedicated line,this paper calculates the parameters of bridge-(48+80+48)m construction monitoring,analysing the sensitivity factors by using Midas Civil software.At the same time,successfully completing the construction monitoring work.Finally,several common working conditions of continuous girder are simulated and analyzed.This paper first summarizes the development of domestic and foreign high-speed railway and cantilever construction research status,lists the basic theory of construction control and research methods,summed up the impact of construction control factors.(48+80+48)m high-speed continuous girder bridge was analyzed by using Midas Civil finite element analysis software,and the results of construction control were analyzed.In addition,this paper compares(48+80+48)m and(32+48+32)m continuous girder,respectively,to discuss the effects of vertical forced closure,the timing of system conversion and base displacement.