整体和浮置式道床隧道结构动应力计算分析  

Calculation and Analysis on Dynamics Stress of Tunnel Structure with Integral and Floating Slab Track

作　　者：杨宁[1] 耿传智[1] 

机构地区：[1]同济大学铁道与城市轨道交通研究院,上海201804

出　　处：《现代城市轨道交通》2015年第1期24-27,33,共5页Modern Urban Transit

摘　　要：利用ANSYS有限元软件,建立了整体道床和浮置板道床情况下隧道结构三维模型,通过对应实测轮轨力的输入,计算得到2种道床下隧道下层结构动应力的分布情况和大小。结论是,浮置板道床对于下层隧道结构动应力影响相较于整体道床小很多,且无论横向还是纵向动应力分布都更加均匀合理。从长远来看,钢弹簧浮置板轨道结构在满足减振降噪的功能前提下,可以有效减小轮轨力造成的隧道结构附加沉降。By using the finite element software ANSYS, the paper establishes the 3D model under the tunnel structure conditions of slab track with monolithic and floating slab. By inputing the corresponding measured wheel-rail force, the paper calculates the tunnel substructure dynamic stress distribution and quantity under the 2 different track beds. The paper makes conclusion that the tunnel substructure dynamic stress effect for the floating slab track compared to the monolithic track bed is much smaller, and both horizontal and longitudinal dynamic stress distribution is more uniform and reasonable. From a long-term point of view and in the premise of having satisfied the vibration and noise reduction functions, the steel spring floating slab track structure can effectively reduce wheel-rail force, therefore reducing the additional settlement of the tunnel structures.

关 键 词：地铁隧道 整体道床 浮置板道床 结构动应力 计算分析 

分 类 号：U213.7[交通运输工程—道路与铁道工程]