Influencing Factors of Pore Water Pressure Variation in Saturated Asphalt Pavement
Under the action of pore water pressure,water scouring and positive and negative pressure suction are one of the main reasons for water damage to asphalt pavement.In order to reduce its damage to the pavement structure,the dynamic response analysis finite element model of saturated asphalt pavement is established,and the influence of different traffic conditions and pavement parameters on the pore water pressure is deeply explored.The results show that the greater the vehicle load and speed,the less conducive to controlling the pore water pressure.When the vehicle load reaches 1.3 MPa,the pore water pressure can reach 1 MPa.When the vehicle speed is increased from 40 km/h to 120 km/h,the pore water pressure is increased by 57.1%.The vehicle load and speed should be limited in the design of road water damage.By setting the drainage surface layer and increasing the elastic modulus and permeability coefficient of the asphalt surface layer,the pore water pressure can be effectively reduced,but the setting of the drainage boundary has no significant effect on the pore water pressure.
road and rail engineeringasphalt pavementfinite element modelpore water pressuretraffic conditionspavement parameters
万方数据
维普
