南昌地铁环境振动预测分析  

Forecasting Analysis of Environment Vibration Induced by Nanchang Subway

作　　者：涂勤明[1] 雷晓燕[2] 毛顺茂 

机构地区：[1]广州地铁设计研究院有限公司,广州助理工程师510010 [2]华东交通大学铁路环境振动与噪声教育部工程研究中心,南昌330013 [3]南昌轨道交通集团有限公司,南昌330038

出　　处：《城市轨道交通研究》2014年第10期30-36,共7页Urban Mass Transit

基　　金：国家自然科学基金项目(U1134107)

摘　　要：根据南昌地铁1、2号线岩土工程勘察报告,选取南昌典型地层进行大地振动仿真分析。建立轨道-隧道-大地三维有限元模型,计算在不同隧道埋深和不同车速时地铁引起的大地振动响应。以振动加速度和频响函数作为指标,分析地铁引起大地振动的特性及传播规律;以Z振级作为指标,比较隧道埋深和车速对地面振动的影响。选取上海和北京某处的地下土层,建立相似的数值模型,并与南昌地铁进行比较分析。计算结果表明:南昌地下土质较硬,地铁引起的环境振动不容易超标,但振动随距离衰减很慢,影响范围较大。According to the report of geotechnical investi- gation of Nanchang subway Line I and Line2, the typical layer of Nanchang is extracted and a simulation analysis of ground vibration is conducted. A 3-D finite element model of rail-tunnel-ground is established, and the ground vibra- tion response induced by subway is calculated in situations of different tunnel buried depths and vehicle speeds. Char- acteristics and propagation law of ground vibration induced by subway are analyzed while the vibration acceleration and frequency response function are taken as the evaluation in- dexes. The influence of tunnel buried depth and train speed on ground vibration is contrasted with Z vibration level as the evaluation index. By selecting the soil layers from cer- tain places of Shanghai and Beijing, similar numerical mod- el is set up and compared with Nanchang subway. The cal- culation shows that the underground soil of Nanchang is harder, the environment vibration value induced by subway does not exceed the standard limit, but the vibration de- creases slowly with distance, so its influence sphere is com-paratively larger.

关 键 词：地铁运营 环境振动 仿真分析 

分 类 号：U231[交通运输工程—道路与铁道工程]