Abstract
Dynamic water scouring damage is the main cause of pavement structure damage, and the main reason for dynamic water scouring damage is the rapid change of pore water pressure caused by vehicle load. Numerical simulation is a commonly used pore water pressure test technology, but its accuracy is not high, and the test data are very different to actual values. In this study, a pore water pressure test method is designed, which has the advantages of less disturbance to the pavement structure and the measured data are closer to the true pore water pressure value of the pavement structure. Measurement data show that the pore water pressure gradually increases with increasing vehicle speed, and the pore water pressure response time becomes shorter. The pore water pressure response time is greater than vehicle loading time. Moreover, the phenomenon of periodic decay of pore water pressure with time is analyzed based on hydrodynamic water hammer theory. The empirical formula of maximum positive pressure with speed and the empirical formula of Abp at different speeds were obtained.
Highlights
Dynamic water scouring damage is a major form of pavement distress that causes government to undergo high maintenance cost [1,2,3]
The results show that the water diffusion coefficient of the asphalt mixture itself directly affects the degree of water damage [10]
It can be seen from the table that the maximum negative pressure is only 1/4 to 1/6 of the maximum positive pressure, which means that the damage effect of pumping on the asphalt pavement is weak during the whole process of dynamic water scouring damage
Summary
Dynamic water scouring damage is a major form of pavement distress that causes government to undergo high maintenance cost [1,2,3]. There under is a unified evaluation a perfect system for asphalt scour damage of pavement structure lacks of effective and systematic. The research dynamic simulation of dynamic water pressure is the most used research at the present stage, and the water scour damage of pavement structure lacks effective andmethod systematic methods. There and is no simulation of dynamic water pressure is the most research method at the Further, present stage, the industry-accepted experimental and evaluation standard fordefects. Evaluating the change field measurement of dynamic method water pressure is rare and has large. The evolution pressure sensor is embedded in the Hui-Wu expressway (in Songyuan City, Jilin Province), and of the pore vehiclein loading is studied based on a mathematical method. The evolutionstatistics of pore water pressure under vehicle loading is studied based on a mathematical statistics method
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