高速铁路无砟轨道隧-隧过渡段路基的动力不平顺及动力响应分析  

Analysis on dynamic irregularity and dynamic response of tunnel-tunnel subgrade transition zone of high-speed railway ballastless track

作　　者：李献民[1,2] 梁艳慧 王梦恕[1] 

机构地区：[1]北京交通大学,北京100044 [2]河南省交通科学技术研究院有限公司,河南郑州450006

出　　处：《土木工程学报》2013年第12期90-96,共7页China Civil Engineering Journal

基　　金：国家自然科学基金(50678177);河南省省院科技合作项目(102106000040);河南省交通运输厅科技计划项目(2010P225)

摘　　要：针对高速列车运行对轨道产生的平顺性和稳定性影响,采用ADAMS/Rail软件,基于车辆-轨道耦合模型,分析填料刚度、车速、过渡段长度、隧-隧间距等对隧-隧过渡段路基的动力不平顺及动力响应的影响规律。研究表明:过渡段长度和隧-隧间距对轮载力响应影响较大;车速对轮载力响应有一定影响,车速越高,相应的轮载力也越大;刚度差异对轮载力响应影响较大,刚度差异越大,相应的轮载力也越大;动位移响应沿轨道走向呈"W"形分布;竖向动应力值随深度增加呈指数函数减小;基床刚度越大,其动位移响应幅值越小,相应的动应力越大。研究成果对控制路基与隧道等构筑物的差异沉降,实现轨道刚度与沉降平顺过渡,具有一定的参考意义。For the regularity and stability probl of vehicle-track, the influencing laws of filling ems of track produced by high-speed trains, based on the coupled model stiffness, vehicle speed, transition length, distance between tunnels on the dynamic irregularity and dynamic response of tunnel-tunnel subgrade transition zone are studied by using the software of ADAMS/Rail. The research results are given as follows ： The transition length and distance between tunnels have great influences on the wheel loading; In a certain degree, the vehicle speed may influence the wheel loading, and with the increase of vehicle speed, the wheel loading may increase; In addition, the stiffness difference has much influence on the wheel loading, and with the increase of stiffness difference, the wheel loading may also increase; The dynamic displacement response appears to be W-shape distributed along the track direction; With the increase of depth, the dynamic stress may decrease exponentially; The larger the subgrade stiffness is, the smaller the dynamic displacement response amplitude appears to be and the larger the corresponding stress tends to be. The achieved results could provide valuable reference for controlling the differential settlement between the subgrade and tunnels and realizing the smooth transition in the track stiffness and settlement.

关 键 词：高速铁路 过渡段路基 动力不平顺 动力响应 

分 类 号：U457[建筑科学—桥梁与隧道工程] U235[交通运输工程—道路与铁道工程]