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水泥混凝土路面碎石化技术以效率高、成本低逐渐成为国内一种重要的处治技术。通过对旧水泥路面碎石化前后的断裂力学分析,依据有限元分析,通过改变碎石化层中两个主要分层的粒径层厚度和粒径模量,对比分析碎石化前后路面和不同破碎程度的应力场变化,研究认为碎石化后表层的拉应力小于级配碎石的情况,表明碎石化后水泥混凝土板块优于级配碎石的力学性能;分析不同的破碎程度对加铺层应力的影响了,发现碎石化下层厚度在8～12cm左右时,碎石化表层拉应力与内部粒径间咬合作用力最佳,起到发挥结构性支撑强度与防止反射裂缝的作用。
Cement concrete pavement crushing technology to high efficiency, low cost has gradually become an important treatment technology. Through the fracture mechanics analysis of the old cement road before and after crushing, according to the finite element analysis, by changing the thickness and particle size of the two main layers in the lithified layer, the pavement surface and Different crushing degree of stress field changes, the study shows that the surface tension after the gravel is less than the graded gravel, indicating that the graded cement concrete plate is superior to graded broken mechanical properties; analysis of the different degree of fragmentation The effect of overlay stress is found. When the thickness of the lower layer is about 8 ~ 12cm, the bite force between the crushed surface tensile stress and the internal particle size is the best, which can play the role of structural support strength and preventing reflection cracks effect.