废轮胎隔振墙对地铁振动的隔振性能影响分析  

Isolation Performance Analysis of Waste Tire Wall on Vibration Caused by Subway Trains

作　　者：金峤[1] 吴梦娇 孙丽[1] JIN Qiao;WU Mengjiao;SUN Li(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2023年第3期483-491,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：“十三五”国家重点研发计划项目(2018YFC1504303)。

摘　　要：目的研究在振动传播土层中设置废弃橡胶轮胎隔振墙的隔振效果,降低地铁列车运行引发的环境振动对沿线建筑物的振动干扰。方法基于ABAQUS平台建立“土体-隧道-隔振墙”模型,列车激励荷载以简谐激振函数来表示,并编制VDLOAD子程序实现移动荷载的施加,模拟地铁列车运行的振动荷载效应,研究废弃橡胶轮胎隔振墙在不同宽度、深度、长度、位置、排数以及填充材料等影响因素下的隔振性能。结果隔振墙的墙深达到或超过隧道埋深时,隔振效果更好;隔振墙厚度对隔振效果影响较小;隔振墙长度取100 m或10倍隔振墙与振源间距时,隔振功能才能得以发挥;隔振墙与振源的最优间距应设置为隧道埋深的1.25~1.875倍;隔振墙排数越多,隔振效果越好;由刚性填充材料组成的隔振墙更适合应用在软土场地中,由柔性填充材料组成的隔振墙更适用于硬土场地中。结论在解决地铁沿线环境振动干扰问题时,采用在被扰结构物与轨道振源之间设置废旧轮胎隔振墙的方法,能够阻隔地铁轨道振动的传播路径,从而达到减轻、隔绝不良环境振动的目的,且该方法具有环境危害小、工程实用性和可行性高、经济性好等特点。In order to reduce the vibration interference of environmental vibration induced by subway train operation to buildings along the line,the vibration isolation effect of setting waste rubber tire vibration isolation wall(WRTVIW)in vibrating soil layers is studied.Based on the ABAQUS platform,the‘Soil-Tunnel-WRTVIW’model is established.The train excitation load is expressed by the simple harmonic excitation function,and the VDLOAD subroutine is compiled to realize the application of moving load,which can simulate the vibration load effect of subway train operation.By these methods,the vibration isolation performance of the WRTVIW under different influence factors,such as wall thickness,wall depth,wall length,wall position,row number and filling material properties,is studied.The simulation results show that:When the wall depth reaches or exceeds the buried depth of tunnel,the vibration isolation effect is better;Thickness of the WRTVIW has little impact on the vibration isolation effect;When length of the WRTVIW is 100 m or 10 times the distance between the vibration isolation wall and the vibration source,the vibration isolation function can be exerted;The optimal spacing between the WRTVIW and the vibration source should be set to 1.25~1.875 times the buried depth of tunnel;The more rows of the WRTVIW,the better the vibration isolation effect;The WRTVIW composed of rigid filling materials is more suitable for soft soil sites,while the one composed of flexible filling materials is more suitable for hard soil sites.It concludes that,when solving the problem of environmental vibration interference along the subway,the method of setting the WRTVIW between the vibration-proof structure and the track vibration source can block the propagation path of the subway track vibration,so as to achieve the purpose of reducing and isolating the harmful environmental vibration.Meanwhile,this method has the characteristics of minimal environmental hazards,high engineering practicability and feasibility,and good economy.

关 键 词：地铁振动 有限元分析 减隔振措施 隔振墙 

分 类 号：TU973[建筑科学—结构工程]