公路隧道复合式路面结构的力学性能研究  

Research on Mechanical Properties of Compound Pavement Structure in Highway Tunnel

作　　者：石春香[1] 

机构地区：[1]上海应用技术学院城市建设与安全工程学院,上海201418

出　　处：《上海应用技术学院学报（自然科学版）》2012年第1期57-60,共4页Journal of Shanghai Institute of Technology: Natural Science

摘　　要：建立了公路隧道复合式沥青路面结构的三维有限元分析模型,对单轴双轮轴载作用下的隧道复合式路面结构接缝处沥青混凝土内部和界面处应力进行了分析比较,确定偏载为最不利加载位置,提炼出关键的设计指标:纵缝边缘加载位中心对应的沥青层底水平拉应力和接缝处沥青层顶面竖向剪应力。通过对不同沥青层厚度、不同弹簧刚度以及不同基岩模量和基层模量下沥青层应力曲线响应进行探讨分析,确定出接缝具有较好的传荷能力,可以有效降低沥青层的厚度,设置模量较高的基层,有利于降低对接缝传荷能力的依赖。Three-dimensional finite model of composite pavement structure in road tunnel was established to analyze and compare the inner and interface stress of asphalt on the concrete joint zone of tunnel compound pavement structure under single-axle-double-wheel loads. It was decided the most disadvantageous load location was bias load and the key design indexes included the tensile stress on the bottom of the asphalt layer and the vertical shear stress on the asphalt surface corresponding to load loca- tion of longitudinal concrete joint edge. The influencing factors such as asphalt layer thickness, spring stiffness,bedrock modulus,and base modulus on these key design parameters were also examined separately. Concrete joint with better transferring load energy could decrease asphalt layer thickness effectively, and base course with high modulus could decrease the dependence on the transferring load energy of concrete joint.

关 键 词：公路隧道 复合式路面结构 三维有限元 设计指标 

分 类 号：U416.217[交通运输工程—道路与铁道工程]