Method and device for testing shear fatigue resistance of pavement interface under vehicle braking conditions

Abstract

The invention discloses a facing interface anti-shearing fatigue test method and device under the vehicle braking condition, and belongs to the technical field of road engineering. The facing interface anti-shearing fatigue performance can be more accurately tested. The test device comprises a framework, a guide rail support seat, a fixing device and a loading device, wherein the framework comprises an upright post, a horizontal slide way and a base; the guide rail support seat comprises a cubic curve guide rail, a rolling wheel and a test piece clamp; the rolling wheel is connected onto the lower part of the test piece clamp; the rolling wheel is positioned in the guide rail; the fixing device comprises an upper part buckle element and a screw bolt; the upper part buckle element and the test piece clamp are buckled and connected; the loading device comprises a vertical loading device, a horizontal traction device and a loading force arm; the horizontal traction device is fixedly connected onto one end of the horizontal slide way; the vertical loading device is positioned in the horizontal slide way; the horizontal traction device and the vertical loading device are connected; thetop end of the loading force arm is fixedly connected with the vertical loading device; the bottom end of the loading force arm is hinged to the upper part buckle element through a screw bolt.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and is mainly used for testing the shear fatigue resistance characteristics of the bonding interface of an indoor pavement structure test piece under load conditions, specifically, it relates to a shear fatigue test of the pavement interface under the condition of vehicle braking Methods and devices. Background technique [0002] With the increasing development of urban roads and highway construction, in the parking and waiting areas of urban road level intersections and long longitudinal slope sections of highways, vehicle braking and starting will generate horizontal loads on the pavement. At this time, the interlayer tangential shear stress will increase several times than that of ordinary road sections, and the asphalt surface layer is prone to interlayer shear failure, especially at the bonding interface between the surface layer and the base layer or the wearing layer. The bonding...

AI Technical Summary

Problems solved by technology

Therefore, the traditional shear fatigue test method cannot reflect the actual situation of the shear angle of the adhesive layer changing with time under the vehicle braking load, and cannot simulate the actual engineering situation. fatigue test

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