旧水泥混凝土路面加铺沥青层的多指标设计方法讨论

旧水泥混凝土路面加铺沥青层对于及时修复已损坏的水泥混凝土路面,保证公路运输畅通具有重要意义。目前最为常用的两种国外旧水泥混凝土路面加铺沥青层的设计方法:AASHTO经验法和弯沉法,在此基础上,加入车辙评定指标——剪应力指标,并以板裂缝处弯沉差、板裂缝处补强层断裂以及《公路沥青路面设计规范》验算指标为控制指标,建立了多指标旧水泥混凝土路面补强设计方法,从而为实际工程提供借鉴。

Discussion on Design Plans of Multiple Indexes for Resurfacing Used Cement Concrete Pavement by Asphalt Layer

Resurfacing the used cement concrete pavement by asphalt layer is of great significance to timely repairing the dameged cement concrete pavement,ensuring the expedite highway transportation.At present,abroad there are both kinds of most common design plans for resurfacing the used cement concrete pavement by asphalt layer-AASHTO experience plan and deflection plan.On this basis,the rust assessing index-shear stress index are added,there are also the indexes controlling the poor deflection and the fracture of strengthening layer at slab cracks,as well as the checking computation index in "Design Specification for Highway Asphalt Pavement".Thus,the design plans of multiple indexes for strengthening the used cement concrete pavement have been established,which provides reference for practical engineering.