摘要
依托室内试槽水稳碎石基层沥青路面结构,应用分层检测分析方法逐层检测了路面结构层的竖向压应力、应变和弯沉,并采用双层弹性体系理论反算并验证了路面结构层的回弹模量.结果表明:土基回弹模量的微小变化对路面结构力学响应的影响可以忽略;各级荷载作用下,基层顶面的竖向压应力和面层层底压应变均随着荷载增大近似线性增加;养生后的水泥稳定碎石层以及沥青面层回弹模量可以被视为常数;双层弹性体系回弹模量反算方法合理可行,具有较高的准确性.在分层检测分析中,应尽量利用压应力测试数据,以获得较高的精度.
Within the asphalt pavement with cement-treated base（CTB） in test tank,layered measure and analysis method is introduced to measure vertical compressive stresses,strains and deflections.Double-layered elastic theory is used to back-calculate and verify resilient modulus of pavement layer.Results show that,minor changes of subgrade resilient moduli have little effects on mechanical responses of pavement layers.Vertical compressive stresses on top of base and compressive strains at the bottom of surface layer increase linearly as loads increase.Resilient moduli of cured CTB layer and surface layer can be taken as constant.Double-layered back-calculation method of resilient modulus is rational and feasible with high accuracy.During the layered measure and analysis,vertical compressive stresses should be firstly considered to obtain better precision.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第5期1061-1065,共5页
Journal of Southeast University：Natural Science Edition
基金
西部交通建设科技资助项目(200631800004
200731849055)
关键词
力学响应
分层检测
回弹模量
反算
mechanical response
layered measure
resilient modulus
back-calculation
