盾构下穿既有运营铁路路基动力响应研究  

作　　者：张奉春 张美凤[2] 

机构地区：[1]青岛地铁集团有限公司,山东青岛266045 [2]青岛酒店管理职业技术学院,山东青岛266100

出　　处：《科技创新与应用》2025年第11期89-92,共4页Technology Innovation and Application

基　　金：中铁三局集团有限公司科研项目(20220601)。

摘　　要：以某地铁线路盾构隧道下穿胶济铁路为工程背景,采用有限元软件建立轨道系统-路基-地基三维数值计算模型,研究列车移动荷载作用下盾构下穿既有铁路路基的动力响应规律。分析不同盾构掘进速度对路基加速度的影响。结果表明,只受盾构掘进扰动影响下,盾构掘进速度降低对路基加速度峰值减小影响显著;当列车驶入时,路基加速度受列车影响较大,但盾构掘进速度降低对路基加速度影响依旧显著;盾构掘进速度的改变主要对5~10 Hz频域产生影响但对中高频域影响较小。研究结果可以为盾构智能化掘进提供参考。Taking a shield tunnel of a subway line passing under the Jiaoji Railway as the engineering background,finite element software is used to establish a three-dimensional numerical calculation model of the track system-subgrade-foundation to study the dynamic response laws of the shield tunnel under the action of train moving loads.Analyze the influence of different shield driving speeds on subgrade acceleration.The results show that under the influence of shield tunneling only,the decrease in shield tunneling speed has a significant impact on the decrease in peak acceleration of subgrade;when the train enters,the subgrade acceleration is greatly affected by the train,but the decrease in shield tunneling speed has a significant impact on the subgrade acceleration.The change in shield tunneling speed mainly affects the 5-10 Hz frequency range but has little impact on the middle and high frequency range.The research results can provide reference for intelligent shield tunneling.

关 键 词：盾构 铁路路基 动力响应 数值计算 智能化掘进 

分 类 号：U213.1[交通运输工程—道路与铁道工程]