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本文对PFWD用于路面脱空评价进行分析和研究,首先运用统计学原理确定一定保证率下板中脱空的弯沉指标;其次,通过室内三维有限元建模分析建立板中—板角理论弯沉的关系曲线,确定板角脱空的弯沉指标,指导路面脱空的评价。该方法原理简单,操作性强,在六叶高速公路大顾店至叶集段水泥路面的脱空评价中发挥重要的作用。
In this paper, PFWD is used to analyze and study pavement voidage evaluation. First, the statistical principle is used to determine the deflation index of void under plate with a certain guaranteed rate. Secondly, the plate mid-plate angle theory is established by indoor three-dimensional finite element modeling Deflection relationship curve, to determine the board corner of the deflection index, to guide the evaluation of the road surface void. The method has the advantages of simple principle and strong operability, and plays an important role in the void evaluation of the concrete pavement from Yegudi Section to the Dibaiguo Expressway in Liuye Expressway.