连续配筋混凝土路面结构优化及性能评价

发布时间：2018-08-20 11:43

【摘要】：针对目前连续配筋混凝土路面(CRCP)的结构特征和缺陷,对CRCP结构进行了研发及优化设计,垫层用碎石,基层采用碾压混凝土,面层分上下两层,上面层采用橡胶水泥混凝土,基层和面层之间设沥青混凝土抗冲刷层;行车道及硬路肩1/2宽度范围内的面层设纵横向连续钢筋以及可滑移支座,硬路肩另外1/2宽度范围的部分为素混凝土,在硬路肩1/2宽度处设纵向接缝,在面层设横向诱导切缝;钢筋采用环氧树脂净浆涂层处理,横向钢筋和纵向钢筋呈30°~60°角;运用断裂力学、损伤力学理论和数值仿真法,对CRCP加铺改造后沥青层的损伤开裂进行了研究,结果表明:新的CRCP结构沥青加铺层的疲劳损伤寿命大幅提高,裂缝扩展强度大大减小,路用性能得到有效提升,经济效益显著。研究成果已有一定的工程应用,提出的设计理念及方法可为连续配筋混凝土路面的合理设计提供理论依据和参考,也可为我国道路设计理论的发展提供有益借鉴。
[Abstract]:In view of the structural characteristics and defects of continuous reinforced concrete pavement (CRCP), the structure of CRCP is developed and optimized. The gravel is used as cushion, the base is roller compacted concrete, the surface layer is divided into two layers, and the top layer is rubber cement concrete. There is a asphalt concrete erosion resistance layer between the base course and the surface; within the width range of 1 / 2 of the carriageway and the hard kerb, the surface layer is provided with longitudinal and horizontal continuous steel bars and sliding supports, and the part of the other 1 / 2 width range of the hard shoulder is plain concrete. A longitudinal joint is arranged at the width of 1 / 2 of the hard shoulder, and a transverse induced joint is arranged on the surface; the steel bar is treated with epoxy resin paste coating, and the transverse steel bar and the longitudinal steel bar are at an angle of 30 掳or 60 掳; and the fracture mechanics, damage mechanics theory and numerical simulation method are used. The damage and cracking of asphalt layer after CRCP overlay is studied. The results show that the fatigue damage life of the new CRCP structure asphalt overlay is greatly improved, the crack propagation strength is greatly reduced, the road performance is effectively improved, and the economic benefit is remarkable. The research results have been applied to a certain extent. The proposed design ideas and methods can provide theoretical basis and reference for the rational design of continuously reinforced concrete pavement, and can also provide useful reference for the development of road design theory in China.
【作者单位】：长沙理工大学公路养护技术国家工程实验室;
【基金】：国家自然科学基金(51678078) 长沙理工大学公路养护技术国家工程实验室开放基金(kfj150102)
【分类号】：U416.216.2

【参考文献】