高速铁路单排封闭式PVC空井减隔振效果的数值分析  

Numerical Analysis of Effect of Vibration Isolation Provided by A Single Row of Empty Wells Enclosed with Polyvinyl Chloride Material Used for High Speed Railway

作　　者：刘晶磊[1] 马玉涛[1] 张立群[1] 宋绪国[2] 赵敏[1] 

机构地区：[1]河北建筑工程学院土木工程学院,河北张家口075000 [2]铁道第三勘察设计院集团有限公司,天津300251

出　　处：《铁道建筑》2016年第11期137-140,共4页Railway Engineering

基　　金：张家口市科技局科技计划(1511074B);河北建筑工程学院科研基金(B-201601)

摘　　要：高速铁路列车在运行过程中产生的振动,严重影响沿线居民的生活和科研院所的工作,需采取有效措施加以控制。通过无限元边界的有限元分析方法对高速铁路单排封闭式PVC（Polyvinyl Chloride）空井减隔振措施进行了研究,结果表明：列车荷载产生的振动波在土体的传播过程中,中、高频段的振动波衰减很快,低频段的振动波是引起土体振动的主要原因;随着空井深度的增加,减隔振效果增强但影响能力有限,建议空井深度设置为10～15 m;当空井直径在400 mm之内时,随着空井直径的增加减隔振效果显著增强,超过400 mm后,对减隔振效果的影响较小,建议空井直径设置为400～500 mm;随着空井间距的增加,减隔振效果明显减弱,建议空井间距设置在0.10 m以内。It is indispensible to adopt effective measures to control the serious vibration to ambient environment during the operation of high speed railway because it severely influences surrounding residents＇ daily life and work of research in the institutes.The measure of a single row of empty wells enclosed with polyvinyl chloride（PVC） used for high speed railway was studied by adopting the finite element method based on infinite elements boundary.The results show that as for vibration wave produced by train load in the soil,the middle and high frequency vibration waves reduce rapidly when they spread,and the low frequency vibration wave is the main cause of soil vibration.With the increasing of the depth of empty wells,the effect of vibration isolation is enhanced,however,it is still limited.It is recommended that the depth of empty wells is set to 10-15 m.When the diameter of empty wells is within 400 mm,with the diameter increasing,the effect of vibration reduction is enhanced evidently.It is recommended that the diameter of empty wells is set to 400-500 mm.When it is more than 400 mm,the effect is unapparent.With the increasing of distance between empty wells,the effect of vibration isolation is declined obviously.It is recommended that the distance between empty wells is set to less than 0.10 m.

关 键 词：高速铁路 单排封闭式PVC空井 减隔振 无限元边界 数值分析 

分 类 号：U215[交通运输工程—道路与铁道工程]