水泥混凝土路面加铺沥青面层结构抗裂缝扩展性能研究

该文介绍了水泥混凝土路面加铺沥青面层结构抗裂缝扩展性能的研究。为了解不同措施延缓水泥混凝土路面加铺沥青层结构反射裂缝的效果,建立了考虑接缝传荷能力的水泥混凝土路面加铺沥青面层结构三维有限元分析模型,以Paris裂缝扩展寿命描述反射裂缝扩展。研究发现各种措施扩展寿命大小差异与接缝弯沉差有关。防裂贴与应力吸收层组合结构的扩展寿命最大,土工布与防裂贴扩展寿命接近。不同防反措施扩展寿命随接缝弯沉差的衰减速率大小为:防裂贴加应力吸收层,应力吸收层,玻纤格栅,土工布,直接加铺。

Study on Resistance to Crack Propagation Properties of Asphalt Overlays on Cement Concrete Pavement

The article analyzes and studies the resistance to crack propagation properties of asphalt overlays on cement concrete pavement.In order to understand the different measures to delay the reflective cracking effect of asphalt overlays on cement concrete pavement,the three-dimensional finite element analysis model is established to consider the joint load transfer of asphalt overlay structure on old cement concrete pavement.The Paris crack propagation life is used to describe the reflective crack propagation.The study finds that the propagation life difference of various measures is closely related to the joint deflection difference.The crack propagation life of crack resistance paste and stress absorbing layer composite structure is the maximum,and the earthwork cloth is closely to the crack resistance paste.The decay rate of the propagation life of the different anti-reflection crack measures along the joint deflection difference is the crack resistance paste plus stress-absorbing layer,stress-absorbing layer,glass fiber grid,earthwork cloth,paved directly.