弹性轨枕与道砟垫组合有砟轨道结构减振效果分析  

Vibration Reduction Effect Analysis of Elastic Sleeper and Ballast Pad Combined Ballast Track Structure

作　　者：贺天龙 HE Tianlong(China Railway First Survey and Design Institute Group Co.Ltd.,Xi’an 710043,China;Shaanxi Railway and Underground Traffic Engineering Key Laboratory(FSDI),Xi’an 710043,China)

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043 [2]陕西省铁道及地下交通工程重点实验室(中铁一院),西安710043

出　　处：《铁道建筑》2024年第5期59-63,共5页Railway Engineering

基　　金：中铁第一勘察设计院集团有限公司科研项目(2022KY08ZD(CYH)-05,院科20-09)。

摘　　要：以西安地铁16号线一期工程沙河滩车辆段规划上盖小学建筑区域为工程背景,开展不同车速下轨道结构减振响应现场测试,并与普通碎石道床进行对比,利用分频振级和最大Z振级两种评价指标研究弹性轨枕与道砟垫有砟轨道结构的组合减振效果。结果表明:采用弹性轨枕减振垫碎石道床时,曲线地段钢轨和轨枕的垂向加速度比直线地段有明显增大,而地表加速度差别不大;随着列车速度增大,钢轨、轨枕和地表的垂向加速度总体呈增大趋势,曲线地段加速度变化波动明显,建议该曲线地段列车运行速度小于15 km/h;弹性轨枕减振垫碎石道床减振频段为4~100 Hz,与普通碎石道床相比,两种减振指标条件下弹性轨枕减振垫碎石道床的减振效果均达12 dB以上,减振效果良好。Based on the planning of the Shahetan depot of the phase I project of Xi’an metro line No.16,covered by the primary school building area,on-site tests were conducted on the vibration reduction response of the track structure at different speeds,and compared with ordinary crushed stone track beds.The combined vibration reduction effect of elastic sleepers and ballast pad ballasted track structures was studied using two evaluation indicators including frequency division vibration level and maximum Z vibration level.The results show that when using elastic rail sleeper vibration reduction pad crushed stone track bed,the vertical acceleration of the steel rails and sleepers in curved sections is significantly increased compared to straight sections,while the difference in surface acceleration is not significant.As the train speed increases,the vertical acceleration of the steel rails,sleepers,and ground surface generally shows an increasing trend.The acceleration changes in the curve section are obvious,and it is recommended that the train speed in this curve section be less than 15 km/h.The vibration reduction frequency range of the elastic rail sleeper vibration reduction pad crushed stone track bed is 4~100 Hz.Compared with ordinary crushed stone track beds,the vibration reduction effect of the elastic rail sleeper vibration reduction pad crushed stone track bed under both vibration reduction index conditions is more than 12 dB,and the vibration reduction effect is good.

关 键 词：地铁 有砟轨道 弹性轨枕 道砟垫 分频振级 最大Z振级 减振效果 

分 类 号：U231.3[交通运输工程—道路与铁道工程]