科技创新与应用2025，Vol.15Issue(11)：89-92,4.DOI:10.19981/j.CN23-1581/G3.2025.11.021
盾构下穿既有运营铁路路基动力响应研究
摘要
Abstract
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Key words
shield/railway subgrade/dynamic response/numerical calculation/intelligent excavation分类
交通工程引用本文复制引用
张奉春,张美凤..盾构下穿既有运营铁路路基动力响应研究[J].科技创新与应用,2025,15(11):89-92,4.基金项目
中铁三局集团有限公司科研项目(20220601) （20220601）
