寒区级配碎石上基层厚度和模量对沥青路面结构力学影响研究

寒区半刚性基层的干缩温缩造成反射裂缝，是面层横向开裂的主要原因之一，而采用级配碎石上基层的倒装沥青路面结构可有效防治反射裂缝的发展，因此结合寒区的气候特点，优化提出了级配碎石集料技术指标和级配范围，同时对级配碎石上基层沥青路面结构进行力学研究，提出适应寒区条件的级配碎石基层厚度和模量。

Study on Influence of Thickness and Modulus of Graded Gravel Upper Base on Mechanical Behavior of Asphalt Pavement

In cold region, the reflective cracking caused by dry and thermal shrinkage of semi-rigid base is one of the main reasons of transverse cracking on surface, and the inverted asphalt pavement structure with graded gravel upper base may prevent the development of such reflective cracking. Therefore, depending on the climatic characteristics of cold region, the technical index and gradation range of graded aggregate were optimized, and the mechanical analysis of such asphalt pavement structure was carried out; on this basis, the thickness and modulus of graded gravel base applicable to the conditions of cold region were proposed.