随着城市人口的增多,地铁工程迅速发展,地铁隧道下穿既有铁路线的情况也越来越多。地下工程在施工过程中,无论是采用明挖法、矿山法还是采用盾构法,都会对周围地层产生扰动,进而影响周边地下构筑物的受力状态。本文结合实际工程研究顶进法下穿多条既有铁路,提出有效的控制轨道结构发生位移与变形的方法,为地铁隧道设计提供依据。 With the increase of urban population, the rapid development of subway projects, subway tunnels under the existing railway line is also more and more. Underground Engineering During the construction process, either the open cut method, the mining method or the shield method will cause disturbance to the surrounding strata and further affect the stress state of the surrounding underground structures. In this paper, a number of existing railways under the jacking method are put forward based on the actual engineering research, and an effective method to control the displacement and deformation of the track structure is proposed to provide the basis for the design of the subway tunnel.