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在沥青加铺层与既有半刚性基层之间设置土工合成材料是防治反射裂缝的有效措施。通过建立三维路面结构模型,系统分析了土工材料铺设宽度、弹性模量与厚度等参数对沥青加铺层结构响应的影响。结果表明:土工材料的铺设宽度对其防反效果影响较为显著,而弹性模量、厚度的影响则较小。提高土工材料的弹性模量,有利于增强路面结构的整体性,削弱基层刚度差异在沥青面层内形成的附加应力,从而有效控制反射裂缝的发展。
Geosynthetics between asphalt overlay and existing semi-rigid base are effective measures to prevent reflection cracks. Through the establishment of three-dimensional pavement structure model, the influence of pavement width, modulus of elasticity and thickness on the response of asphalt overlay was systematically analyzed. The results show that the laying width of geotextile material has a significant effect on the anti-counterfeit effect, while the effect of elastic modulus and thickness is smaller. Increasing the elastic modulus of geotextile material is conducive to enhancing the integrity of the pavement structure and weakening the additional stress formed in the asphalt pavement by the difference in rigidity of the basement so as to effectively control the development of the reflective cracking.