Aeolian sand asphalt pavement particle motion state recognition system and use method thereof

Abstract

The invention belongs to the field of civil engineering, and discloses an aeolian sand asphalt pavement particle motion state recognition system and a use method thereof. A lifting device for drivinga lifting plate to move up and down is installed on a bottom plate, a frequency modulation controller and a motor are fixed to the lifting plate, a rotating shaft is connected to the motor, and the lower end of the rotating shaft penetrates through the bottom plate and is provided with a flywheel and a turntable; a plurality of rubber blocks are mounted at the bottom of the turntable; and a linearspeed sensor, a rotating speed sensor and a torque sensor which are connected with a computer are respectively arranged on the rotating shaft. The system can simulate the dynamic migration process ofreal asphalt pavement aeolian sand particles at different initial speeds and under different aeolian sand densities, the change trend of pavement friction coefficient values under different aeolian sand densities is obtained through computer processing by utilizing information obtained by the linear speed sensor and the torque sensor, an effective means is provided for researching the skid resistance of the asphalt pavement; and the method is simple, repeatable in operation and good in stability.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to an identification system for the movement state of aeolian sand asphalt pavement particles and a method for using the system, which is used to observe and identify the movement state of aeolian sand particles on asphalt pavement in desert areas, and to understand wind accumulation The movement and migration state of sand particles and the determination of their coefficient of friction, and the evaluation of the skid resistance of asphalt pavement. Background technique [0002] With the rapid development of modern transportation, people's demand for roads is no longer limited to satisfying basic functions such as convenience, efficiency, and speed, but focuses on how to improve driving safety and driving comfort. Insufficient skid resistance of asphalt pavement is an important factor leading to frequent traffic accidents. Within the design service life, under the long-t...

AI Technical Summary

Problems solved by technology

[0004] At present, there have been many research results on the anti-slip and decay characteristics of asphalt pavement, but they are mainly carried out on the condition of no pollutants on the road surface or road surface water and icing conditions. There is a lack of detailed research on the anti-skid performance of desert roads and the mechanical behavior of aeolian sand.

The accumulation of water and icing on the road surface can usually be simulated by finite elements, but due to the inhomogeneity and anisotropy of the particles, the movement behavior of aeolian sand on the tire / road contact interface cannot be simply applied to the existing research results.

Images