交叠车站与区间隧道列车振动对环境的影响

以北京地铁5号线崇文门车站下穿既有地铁2号线区间隧道为背景,研究了上下交叠地铁区间隧道与车站在列车同时通过时,其振动对周围环境的影响.根据5号线崇文门车站与2号线区间隧道的空间相对位置,建立了三维弹塑性有限元模型;采用车辆-轨道耦合动力学模型,得到作用于道床底部的列车动载;根据各种可能的列车荷载组合,分别研究了15种动载组合情况下地表振动的规律.

Environmental Vibrations Induced by Trains' Passages Through Overlapping Station and Tunnels

Based on the Chongwenmen station of Beijing subway line 5 which is under the existing tunnel of line 2, the effects on surrounding environments due to the passing train induced vibration which acts on the overlap tunnels as well as the station are studied. According to the special location of the overlapping tunnels and station, a three-dimensional elastoplastic model is presented. The simulations of train-track system vibration by computer model provides the excitation loads of moving trains onto the tunnel and station structure. According to many compositions of the train vibration loads, the ground vibrations are studied under fifteen load situations.