基层模量对重载交通沥青路面受力特性的影响分析

基层模量的取值将直接影响到路面结构的受力特性，它是是路面设计的重要力学参数之一。本文系统分析基层模量变化对重载交通沥青路面路表弯沉、基层层底拉应力、底基层层底拉应力的影响，并阐述了其影响规律。结果表明．基层模量对重载交通沥青路面的受力与变形特性具有显著的影响，提高基层模量值将显著减小路表弯沉值底基层层底拉应力，而基层本身的层底拉应力值将增大，需要在路面设计中充分重视。

The influence base course modulus have on stress characteristics of heavy traffic asphalt pavement

Basecourse modulus is one of the important mechanical parameters in pavement design. It will directly influence the mechanical properties of asphalt pavement structure. Using pavement design and analysis software, the effects of base course modulus on surface deflection, tensile stress at the bottom of base and sub-base course of heavy load semi-rigid asphalt pavement structure were analyzed systematically. And the influencing laws were analyzed, too. The results indicate that the mechanical properties and deforming characteristics of heavy load asphalt pavement were influnced significantly by base course modulus. With the increasing of base course modulus, the surface deflection, tensile stress at the bottom of sub-base course would significantly decrease, and tensile stress at the bottom of base course of heavy load semi-rigid asphalt pavement structure would increase. This should be taken account in the pavement design.