摘要
Excessive vibrations inside buildings in the Lihu New Village caused by the Shenzhen Metro Line 2 underground railway were investigated by conducting analyses of the tunnel,the track irregularities,the stiffness of the fastening system,and the vibrations of the track system and the building at different speeds.A numerical simulation based on the dynamic coupling theory of the vehicle-track system was used to verify the experimental results.Suitable countermeasures were investigated.The results show that rail corrugation is the primary reason for the excessive vibration,and an increase in the stiffness of the vertical fastening system is the secondary reason.The solution was to eliminate the rail corrugation using rail grinding and decrease the vertical stiffness by changing the fastening system.The results of this study provide references for solving vibration problems caused by rail lines.
通过分析不同速度下隧道、轨道不平顺、扣件刚度以及轨道系统和建筑物的振动,研究了由深圳地铁2号线引起荔湖新村建筑物内的过度振动。基于车辆-轨道系统耦合动力学的数值模拟证实了实验结果,并研究了合理对策。结果表明,钢轨波磨是引起过度振动的主要原因,扣件系统的垂向刚度是次要原因。通过钢轨打磨消除钢轨波磨以及更换扣件系统降低垂向刚度可以解决上述问题。研究结果为解决铁路引起的振动问题提供了参考。
作者
MING Xuan-hui
ZHENG Jun-yuan
WANG Liu-chong
ZHAO Cai-you
WANG Ping
YAO Li
明暄辉;郑钧元;王刘翀;赵才友;王平;姚力(Key Laboratory of High-speed Railway Engineering of Ministry of Education,Southwest Jiaotong University,Chengdu 610031,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;China Railway Eryuan Engineering Group Co.Ltd,Chengdu 610031,China)
基金
Projects(U1734207,51978585)supported by the National Natural Science Foundation of China
Project(2016 YFE 0205200)supported by the National Key Research and Development Program of China。
作者简介
Corresponding author:ZHENG Jun-yuan,PhD,Tel:+86-15680522368,E-mail:474507810@qq.com,ORCID:https://orcid.org/0000-0001-5203-3136。
