摘要
为减少城市轨道交通运营过程中经由隧道区间传播至地表的振动,基于雄安至北京大兴机场R1线明挖区间,对区间内橡胶混凝土隔离桩隔离进行研究。采用ABAQUS建立隧道-地层模型,对等高式、上穿式、下插式、阻隔式等四种工况进行减振效果分析。研究结果表明:等高式工况,最大可使地表振动加速度减小28.5%,振动加速度级降低5.5%;上穿式工况,最大可使地表振动加速度减小27.2%,振动加速度级降低2.1%;下插式工况,对辐射振动的整体阻隔作用显著,最大使地表振动加速度减小28.1%,振动加速度级降低5.4%;阻隔式工况,最大可使地表振动加速度减小25.9%,振动加速度级降低4.4%。
In order to reduce the vibration propagating through the tunnel interval to the ground surface during urban rail transit operation,the barrier effect of rubberized concrete isolation piles in the interval is studied.Taking the open excavation interval of the R1 line from Xiong′an to Beijing Daxing Airport as a research object,ABAQUS was used to establish the tunnel-ground model of this interval.The vibration reduction effects were analyzed for four working conditions,such as equivalent-height type,upper-penetration type,lower-insertion type,and barrier type.The results show that:The equivalent-height type can reduce the ground vibration acceleration by 28.5%and the vibration acceleration level by 5.5%;The upper-penetration type can reduce the ground vibration acceleration by 27.2%and the vibration acceleration level by 2.1%;The lower-insertion type has a significant effect on the overall damping of radiation vibration,reducing the ground vibration acceleration by 28.1%and the vibration acceleration level by 5.4%;The maximum reduction of ground surface vibration acceleration is 25.9%and that of the vibration acceleration level is 4.4%in the barrier type condition.
作者
殷东昊
金浩
夏瑞萌
顾兴宇
YIN Donghao;JIN Hao;XIA Ruimeng;GU Xingyu(School of Transportation,Southeast University,Nanjing 211189,China;Beijing Urban Construction Design and Development Group Co.,Ltd.,Beijing 100037,China)
出处
《噪声与振动控制》
CSCD
北大核心
2023年第6期228-232,246,共6页
Noise and Vibration Control
基金
国家自然科学基金资助项目(51908428)
江苏省自然科学基金资助项目(BK20211173)。
关键词
振动与波
地铁
隧道区间
隔离桩
橡胶混凝土
振动特性
vibration and wave
subway
tunnel interval
isolation pile
rubberized concrete
vibration characteristics
