动载下沥青路面超孔隙水压力分析

Express Pore Fluid Stress Analysis of Asphalt Pavement under Dynamic Loads

沥青路面结构内部的孔隙水在高速行车荷载的作用下形成的瞬时超孔隙水压力是造成路面水损害的重要原因。文中采用Hankel变换和波数域离散方法求解弹性饱和半空间体系的动力响应问题。分析了沥青路面在饱水状态下其内部孔隙水压力的变化规律以及弹性模量等材料参数变化时对孔隙水压力的影响。

The instantaneous super pore water pressure produced by the pore water of the inner structure of asphalt pavement, under the action of the high speed wheel is an important reason that results in water damage of the pavement. The dynamic response of a elastic saturated half-space porous medium is studied in the paper. It is solved by means of the Hankel transforms and discrete method in wave-number domain. There are two aspects that will be discussed. One is the change regularity of inner pore water pressure of asphalt pavement in the saturated state. Another is the influences of material variables such as elastic modulus to the pore water pressure