Research On The Effect Of Underpass's Construction Through Railway

With the continuous extension of railway network and highway network,cross engineering of highway and railway is increasing day by day.In the railway and highway overpass project,due to the importance of railway engineering,considering the ease of construction and engineering construction cost and other factors,the more time for the highway interchange form under railway,but because there is no quantitative specification related that during the period of construction,because the railway and the influence of adjacent construction the mechanical properties of the index,so in engineering,it is difficult to accurately reflect the construction and operation will bring security risks to the normal operation of the railway.The South Grand Trunk wear Guiguang,Beijing Guangzhou,Guangzhou Zhuhai parking walk line three railway interchange project as the research background,analyzes the construction and operation of the new highway requirements to control settlement of the existing railway line,studies the process of road crossing under the existing railway bridge and the existing subgrade,discusses the highway the mechanical state of the frame bridge and the mechanical state of existing railway bridge on existing railway jacking construction process.It provides reference and reference for the next highway to wear existing railway project in the future.The main research work and conclusions are as follows: 1)on the southern link beneath the construction scheme of the wide,Jingguang bridge girder section are analyzed,put forward the high-speed railway bridge settlement requirements,and access to relevant settlement control standard through high-speed railway engineering practice,the southern link beneath the Beijing Guangzhou,Guangzhou limit requirements of settlement deformation of bridge pier,and the the ANSyS finite element software,simulation analysis of the numerical analysis of road construction of bridge pile foundation.(2)construction plan of parking line in Guangzhou Zhuhai railway of south trunk,put forward the settlement of Intercity Railway Subgrade requirements,according to the southern link beneath the Beijing Guangzhou,Guangzhou limit requirements of settlement deformation of piers,the use of finite element software ANSYS,simulation analysis of the numerical analysis of the southern route frame bridge wear under the Guangzhou Zhuhai railway car line base section.(3)according to the general situation and the construction scheme of the south railway crossing the existing railway interchange,the main influencing factors and the scope of the construction process are determined.According to its special engineering,the south main line under the wear of your Canton,Guangzhou Guangzhou railway and Guangzhou Zhuhai intercity railway used in the way of railway bridge under the bridge and the bridge in the form of the construction of the existing railway line.Based on the analysis of the project,it is concluded that the bridge has a larger risk source of the existing bridge crossing the bridge under the framework of the bridge.