间歇荷载-湿化耦合作用下有砟轨道路基翻浆冒泥机制及动力特性试验研究  

Experimental study on mud pumping mechanism and dynamic characteristics of ballasted track subgrade under intermittent load-wetting coupling

作　　者：韩博文 蔡国庆[4,5] 苏彦林[4,5] 单冶鹏 李舰 HAN Bowen;CAI Guoqing;SU Yanlin;SHAN Yepeng;LI Jian(School of Traffic and Transportation,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China;Key Laboratory of Traffic Safety and Control of Hebei Province,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China;State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China;Key Laboratory of Urban Underground Engineering of Ministry of Education,Beijing Jiaotong University,Beijing 100044,China;School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]石家庄铁道大学交通运输学院,河北石家庄050043 [2]石家庄铁道大学河北省交通安全与控制重点实验室,河北石家庄050043 [3]石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室,河北石家庄050043 [4]北京交通大学城市地下工程教育部重点实验室,北京100044 [5]北京交通大学土木建筑工程学院,北京100044

出　　处：《岩石力学与工程学报》2025年第1期69-80,共12页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(52078031,U2034204,52308365)。

摘　　要：间歇性列车荷载与降雨湿化耦合作用下有砟轨道路基的翻浆冒泥机制及动力特性尚不明确。开展间歇荷载-湿化耦合作用下有砟轨道路基翻浆冒泥模型试验,试验结果表明:循环荷载作用对体积含水率与孔隙水压力增长具有促进作用,且促进作用随土体干密度增加而减弱。累积变形和颗粒迁移主要发生在LS1~LS3阶段,LS2阶段因试样处于较高饱和度与较低密实度状态变化最为显著。后续各加载阶段因土体密实度较高仅产生少量累积变形,颗粒迁移现象不明显,间歇期(IS4~IS7阶段)出现小幅回弹。试验结束时,道砟孔隙污染物指数(VCI)为27%,与需要进行铁路维修的临界值40%较为接近,需引起重视。The mud pumping mechanism and dynamic characteristics of ballasted track subgrade under intermittent train load and rainfall wetting coupling are still unclear.A mud pumping model test in ballasted track subgrade under intermittent load-wetting coupling was conducted.The experimental results indicate that the cyclic loading has a promoting effect on the increase of volumetric water content and pore water pressure,and the promoting effect weakens with the increase of dry density.The accumulated deformation and particle migration mainly occur in the LS1-LS3 stages,and the changes are most significant in the LS2 stage because of the high saturation and low density of the soils.In the subsequent loading stages,only a small amount of accumulated deformation occurs due to the high density of the soils,and the phenomenon of particle migration is not obvious.A small resilience occurs during the intermittent period(IS4-IS7 stage).At the end of the experiment,the ballast void contaminant index(VCI)is 27%,which is close to the critical value of 40%for railway maintenance and needs to pay attention.

关 键 词：路基工程 翻浆冒泥 间歇荷载 模型试验 累积变形 颗粒迁移 孔隙水压力 

分 类 号：U215[交通运输工程—道路与铁道工程]