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水泥混凝土路面板底脱空是早期病害的主要形式,由于基层的不均匀沉降、车辆荷载反复作用的塑性变形等因素导致面层底脱空,地面水沿着接缝下渗而积聚在脱空的空隙内,在车轮荷载作用下变成动水冲刷作用,进而造成脱空加剧,从而导致水泥混凝土面板的断裂。通过数值分析对路面板角脱空形成机理以及在行车荷载与脱空导致面层板的断裂机理进行分析,同时讨论了路面厚度、路基土和基层模量变化对路面结构的应力状态的影响。
The emptying of cement concrete pavement bottom is the main form of early disease. Due to the uneven settlement of the grass-roots level and the plastic deformation caused by repeated vehicle loading, the bottom of the surface layer is vacuumed and the surface water infiltrates along the joint to accumulate in the void Of the gap, under the action of the wheel into a moving water scouring effect, resulting in increased void, resulting in the fracture of the concrete slab. Through numerical analysis, the forming mechanism of pavement angle and the fracture mechanism of pavement slab caused by driving load and void are analyzed, and the influence of pavement thickness, subgrade soil and base modulus on the stress state of pavement structure is also discussed.