旧水泥板加铺沥青层设计方法研究

Study on design method of asphalt overlay on old cement slab

文章针对目前我国还没有一套成熟的加铺层设计体系,通过系统研究国内外沥青加铺层设计方法,指出了我国路面设计规范中的不足,并比较和分析了加铺层设计方法的优缺点,得出了可值得借鉴的方面;基于对沥青加铺层主要破坏形式的考虑,提出了控制反射裂缝的沥青加铺层设计方法,运用断裂力学理论和有限元建模体系,进行了算例分析,其过程简单,精确度高,可为下一步的沥青加铺层设计与施工提供理论基础。

There is no fully-fledged design system of asphalt overlay in China at present. Based on a systematic study of design methods of asphalt overlay at home and abroad, this paper points out the shortages in Specifications of Pavement Design in China. The paper also compares and analyzes the ad- vantages and disadvantages of design methods for overlay and finds out the reference points. Considering the main destruction forms of the asphalt overlay, the paper puts forward the design method of asphalt overlay based on reflection crack control and makes a numerical example using fracture mechanics theory and finite element method. The process is simple and the accuracy rate is high, which provides a theoretical foundation for further design and construction of asphalt overlay.