Analysis of Vehicle-Force-Induced Dynamic Pore Pressure in Saturated Pavement With LSPM Drainage Base

摘要

Dynamic pore pressure caused by moving-vehicle forces may cause damage in asphalt pavement. However, few field data of dynamic pore pressure are available. This research aimed to study the time histories of dynamic stress and dynamic pore pressure in the drainage base of large stone porous asphalt mixes (LSPM) under moving-vehicle forces. To this end, heat-resistant dynamic stress and pore-pressure sensors were developed and used to measure the dynamic stresses and pore pressures in the field. A numerical fluid-solid coupling simulation method was used to analyze the response of pavement under moving wheel forces. Numerical simulation results matched well with in situ test data. The time histories of dynamic pore pressure in the pavement are quantitatively analyzed, and the hydraulic mechanism of moisture-induced damage is verified. This study provides a theoretical guide for pavement design.