城市水泥路面共振碎石化加铺沥青层方案探讨

Discussion on Scheme of Resonant Rubblized Asphalt Overlay for Urban Cement Pavements

摘要:

对旧水泥路面进行共振碎石化后加铺沥青层的技术，不仅不会使路面产生反射裂缝，还能保证路面较长的使用寿命，该技术已在公路水泥路面改造中得到广泛应用。然而，城市道路受现状人行道高程的限制，行车道路面加铺厚度一般不超过10 cm，以保证人行道高度比加铺后的车行道高5 cm以上，从而有利于排水和交通安全。因此，对城市水泥路面进行共振碎石化后，往往还需要对碎石表层进行适当的铣刨、铲除才能加铺沥青层。针对城市道路特点，结合祁阳大道改造工程实践，通过路面结构计算，分析并探讨城市水泥混凝土路面共振碎石化后加铺沥青层设计方案、碎石层的处理措施和质量控制标准，以及特殊路段的处理方案等，可供城市水泥路面黑色化改造设计和施工参考。

Abstract:

The technology of resonant rubblized asphalt overlay for existing cement concrete pavements not only does not cause reflective cracks on the pavement, but also ensures a longer service life of the pavement. This technology has been extensively implemented in highway cement pavement reconstruction projects. However, the overlay thickness of the carriageway pavement in urban roads generally does not exceed 10 cm due to constraints related to existing sidewalk elevations in order to ensure that the height of the sidewalk is more than 5 cm higher than that of the newly paved carriageway, which is conducive to drainage and traffic safety. Therefore, after the resonant rubblization of urban cement pavement, it is often necessary to appropriately mill and remove the surface layer of crushed stones before laying an asphalt layer. Aiming at the characteristics of urban roads, combined with the practice of the Qiyang Avenue Reconstruction Project, and through the calculation of pavement structure, the design scheme for adding asphalt layer after resonant rubblization of urban cement concrete pavement, the treatment measures and quality control standards for the crushed stone layer, and the treatment scheme of the special road section are analyzed and discussed, which provides the reference for the design and construction of urban cement pavement asphalt reconstruction.