列车荷载对基坑围护结构的动力响应分析  

Dynamic Response Analysis of Train Load to Foundation-pit-retaining Structure

作　　者：程思悟 董捷[1,2] 冯凯 程书良 王小敬 CHENG Siwu;DONG Jie;FENG Kai;CHENG Shuliang;WANG Xiaojing(Hebei University of Architecture,Zhangjiakou,Hebei 075000;Hebei Innovation Center of Transportation Infrastructure in Cold Region,Zhangjiakou,Hebei 075000;Beiwang Construction Group Co.,Ltd.Chengde,Hebei 067000)

机构地区：[1]河北建筑工程学院,河北张家口075000 [2]河北省寒冷地区交通基础设施工程技术创新中心,河北张家口075000 [3]北旺集团有限公司,河北承德067000

出　　处：《河北建筑工程学院学报》2023年第3期21-25,88,共6页Journal of Hebei Institute of Architecture and Civil Engineering

基　　金：河北建筑工程学院研究生创新基金项目(XY202207);河北建筑工程学院研究生创新基金项目(XY2023041)。

摘　　要：为了探讨基坑维护结构在列车荷载作用下的动力响应,应用有限元分析软件对邻近基坑地表沉降及墙体位移在不同列车荷载简化方式下及不同列车运行速度下的变形情况进行了监测分析。数值计算结果表明:(1)对于邻近铁路侧地表沉降,列车振动产生的附加荷载的影响不能忽略,应该加以考虑。(2)将列车荷载简化为竖向激振荷载与将列车荷载简化为固定数值的静轮载产生的效果相当,在分析基坑两侧地下连续墙的最大位移时可以将列车荷载等效为固定数值的静轮载。(3)高路堤偏压与列车动载对近铁路侧地表沉降幅度影响较大,近铁路侧地表受到偏压与动载的影响更显著。(4)列车轴重和速度的改变对近铁路侧的影响较大,在研究有列车动荷载影响的基坑外地表沉降时,列车的轴重及速度要取最大值。In order to get the deformation law of foundation pit under train load,the finite element analysis software is applied to the numerical simulation calculation of the surface settlement around the foundation pit and the horizontal displacement of wall under different load application modes and different train running speeds.Calculation result display:(1)For the ground settlement of adjacent railway side,the influence of additional load caused by train vibration should not be ignored and should be taken into account.(2)The effect of simplifying train load into vertical excitation load is equivalent to that of simplifying train load into static wheel load with fixed value.When analyzing the maximum displacement of underground diaphragm wall on both sides of foundation pit,train load can be equivalent to static wheel load with fixed value.(3)The bias effect produced by high embankment and the dynamic load of train have great influence on the land settlement amplitude of adjacent railway side,and the bias effect and dynamic load produced by high embankment have more significant influence on the land settlement amplitude of adjacent railway side.(4)The change of train axle load and speed has a great influence on the near side of the railway.The maximum value of train weight and speed should be taken when the influence law of the settlement of the surface outside the foundation pit under the action of train dynamic load is discussed.

关 键 词：动力响应 简化方式 运行速度 

分 类 号：U25[交通运输工程—道路与铁道工程]