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随着经济的发展,我国高等级公路路面的常用结构是在半刚性基层上铺设沥青混凝土,然而,当半刚性基层的水平、竖向位移产生的拉应力超过沥青混凝土罩面层的抗拉强度时,罩面层便会出现大量的反射裂缝,进而影响路面结构的稳定性和使用寿命。为了防止反射裂缝的产生,在半刚性基层与沥青混凝土面层之间铺设应力吸收层,一直是人们研究和关注的热点。
With economic development, the common structure of high-grade highway pavement in our country is laying asphalt concrete on semi-rigid base. However, when the tensile stress of horizontal and vertical displacement of semi-rigid base exceeds the tensile strength of asphalt concrete overlay, When the overlay will appear a large number of reflective cracks, thereby affecting the stability of the pavement structure and service life. In order to prevent the generation of reflection cracks, laying stress-absorbing layer between the semi-rigid base and asphalt concrete pavement has been a hot spot that people research and pay attention to.