水泥混凝土路面板底脱空区域动水压力分布特性

Distribution Characteristics of Hydrodynamic Pressure in Voids Beneath Cement Concrete Pavement Slabs

为了研究脱空区滞留水产生动水压力的分布特性,建立含脱空区混凝土路面-滞留水双向流固耦合计算模型,分析了车辆行车位置、行车速度、轴载、脱空区面积等因素对动水压力的影响。研究结果表明:动水压力沿着出口方向呈三次方减小关系;车辆行驶速度、轴载、脱空区面积是影响动水压力的3个重要因素;动水压力大小与行驶速度呈二次方增加关系,与轴载呈线性增加关系,与脱空区面积呈三次多项式增加关系。

In order to study the distribution characteristics of the hydrodynamic pressure caused by retained water in the voids beneath cement concrete pavement slabs, a two-way fluid-solid coupling model of concrete pavement-retained water was established, and the effect of factors such as vehicle position, driving speed, axle load and void area on the hydrodynamic pressure was analyzed. The results show that the hydrodynamic pressure drops with the third power of distance towards the outlet; the hydrodynamic pressure increases along with the driving speed, axle load and void area, which are the three important factors, following a quadratic, linear and cubic polynomial relationship respectively.