水泥混凝土路面横向接缝错台模型与应用

Transverse Joint Faulting Models and Application of Cement Concrete Pavement

接缝错台是水泥混凝土路面的常见结构病害,精确预测错台演化规律对制订路面养护对策具有重要指导意义.对国内外几种典型水泥混凝土路面横向接缝错台模型进行对比分析,探讨了模型的演变和发展历程,分析了模型参数不断具体化和隐性化的发展趋势.对广西柳南高速公路的接缝错台发展规律的分析表明,该路段错台发生发展过早过快的主要原因是接缝设计不当,并非面板过薄和交通量增长与预计不符所致;在接缝中设置传力杆可延缓错台的发生,并为预防性养护的有效切入提供足够的时间,便于预防性养护工作的合理安排与顺利开展;同时,指出了应用其他国家或地区的模型时所应遵循的基本原则与综合修正方法,旨在为国内错台模型建立提供有益的参考价值,并为水泥混凝土路面预防性养护技术的推广与发展提供坚实的理论基础.

Transverse joint faulting is a common structural disease of cement concrete pavement,and to accurately predict the development of faulting is significantly important for guiding the formulation of pavement maintenance measures.Several typical cement concrete pavement transverse joint faulting models at home and abroad are comprehensively analyzed,and both the evolution process of the models and the trend of the model parameters＇ embodiment and recessivation are studied.Besides,analysis of transverse joint faulting of Liu-Nan expressway in Guangxi shows that the occurrence and development of premature faulting is not mainly caused by thin slabs and inaccuracy of traffic prediction,but poorly-designed joints;the Setting of dowel bars in the joint can slow down the development of joint faulting,thus provide enough time for the implementation of preventive maintenance and facilitate the reasonable formulation of preventive maintenance plan.Finally,both the basic principles and the integrated amendment method for the application of other countries＇ or regions＇ models are brought forth,which provides a useful reference to our models＇ establishment and a solid theory for popularizing and developing cement concrete pavement preventive maintenance.