城际铁路地下线振动源强取值研究  

Research on the Value of Vibration Source Intensity for the Underground Line of Intercity Railway

作　　者：冯杜炀 郭骁 吴思行 宋天昊 Feng Duyang;Guo Xiao;Wu Sixing;Song Tianhao(China Railway Engineering Design and Consulting Group Co.,Ltd.,Beijing 100055,China)

机构地区：[1]中铁工程设计咨询集团有限公司,北京100055

出　　处：《铁道勘察》2022年第2期98-102,共5页Railway Investigation and Surveying

基　　金：广州地铁集团有限公司A类课题(HT2101572020-3);中铁工程设计咨询集团有限公司科技开发课题(研2020-32)。

摘　　要：随着城际铁路快速发展,沿线可能存在较多如学校、住宅、宾馆等对振动敏感型建筑,轨道结构需结合不同工况进行特殊设计以满足减振要求,合理准确振动源强对轨道减振设计非常重要。为解决既有城际铁路振动源强取值不准确问题,提升城际铁路振动预测的准确性,采用实测与仿真的方法对城际铁路源强值进行研究。首先,对某城际铁路矩形隧道地段实测了现场振动数据,并建立有限元分析模型。之后,采用实测的振动源强数据验证有限元分析模型。建立适用于不同速度范围的明挖隧道及暗挖隧道,分析不同隧道类型、不同车速工况下的振动源强数据,得出城际铁路不同速度级及不同隧道类型的振动源强推荐值。With the rapid development of intercity railway, there are many vibration-sensitive buildings such as schools, residences, hotels, etc. The track structure needs to be specially designed in accordance with different conditions to meet the requirements of vibration reduction, and the vibration source should be determined reasonably and accurately. In order to solve the inaccurate value problem of vibration source and improve the accuracy of prediction of vibration effect, in-situ test and simulation methods were adopted for the research. Firstly, field vibration data was measured on a rectangular tunnel section of an intercity railway, and the finite element analysis model was verified by the measured vibration source intensity data. Afterward, calibrated model was used to analyze the vibration source intensity data. Models of different types of tunnels and different vehicle speed were built, suggested vibration source data for intercity railway with different tunnels and speeds were proposed.

关 键 词：城际铁路 地下线 振级 垂向加速度 有限元分析 振动源强 

分 类 号：U239.5[交通运输工程—道路与铁道工程] U211.3