Test device for testing bituminous pavement shear failure

Abstract

The invention discloses a test device for testing bituminous pavement shear failure. The test device comprises a control system, a test stand, a reaction frame and a temperature control box located onthe test stand, a sample loading table for placing a sample to be tested, a wheel located on the sample to be tested, a horizontal drive device for driving the wheel to move on a surface of the sample to be tested, a vertical forcing device for enabling the wheel to apply pressure on a surface of the sample to be tested, a displacement sensor for detecting horizontal displacement of the surface of the sample to be tested, a horizontal pressure sensor for detecting a pushing force of the horizontal drive device on the wheel, and a vertical pressure sensor for detecting pressure of the wheel applied on the surface of the sample to be tested. The device can simulate damage of a vehicle on a pavement under the conditions of different loads, different temperatures and different initial horizontal forces, and meanwhile, can simulate a braking process of the vehicle.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and relates to a test device for testing shear damage of asphalt pavement. Background technique [0002] Asphalt pavement is more prone to shear failure at intersections and downhill slopes, mainly because the braking of vehicles will generate a large horizontal force on the road surface. The code requires that the shear stress should be checked when designing the pavement. However, most pavement designers The shear stress has not been checked. In addition, there is a lack of available test devices for the detection of the horizontal force of the pavement. With the vigorous development of expressways, the requirements for road surfaces are getting higher and higher, and the design of weak links is even more important. Therefore, it is particularly important to simulate the braking effect of vehicles and detect the shear failure of asphalt pavement under this effect. important. In order...

AI Technical Summary

Problems solved by technology

[0002] Asphalt pavement is more prone to shear failure at intersections and downhill slopes, mainly because the braking of vehicles will generate a large horizontal force on the road surface. The code requires that the shear stress should be checked when designing the pavement. However, most pavement designers The shear stress has not been checked. In addition, there is a lack of available test equipment for the detection of the horizontal force of the road surface.

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