The Experimental Method and Mechanics Analysis of Shearing Stress Between Layers of Semi-rigid Base Course Pavement

摘要

In the field investigation, it is often found that shearing destructive is a destructive form between Layers of the pavement during hot season. This kind of sheering stress result from the cooperative influence of both horizontal load and vertical load. In this paper we use the elastic three layered theory to analyze and deduce the stress strain and displacement of asphalt pavement on semirigid base course under the effect of double-cycle wheel Load as to get the formula of stress coefficient and maximum shearing stress coefficient This result can be a theoretical basis for analysis of shearing stresses between the asphalt pavement and semi-rigid base course The method used in laboratory to analyze the shearing stresses between asphalt pavement and semi-rigid base course directly affect the consisting of the theoretical computing pattern and the stressing state of in the experiment. So it inevitable influences the accuracy of the analysis and judgment in the shearing destruction of the asphalt pavement In this paper the stress characteristic in the direct shearing experiment is analyzed on the basis of mol-column strength theory The using limits/range of the experiment is pointed out The shearing destruction characteristic of semi-rigid base course asphalt pavement on is analyzed At the same time we put up with the viewpoint that it is feasible to found evaluation indexes of shearing stresses between asphalt pavement and semi-rigid base course using direct shearing experiment.