Method for discriminating application range of flexible surface under overload condition

Abstract

The invention discloses a method for discriminating the application range of a flexible surface under the overload condition. According to the method, the flexible surface is introduced, and the traditional method that only a semi-rigid surface is adopted, and the thickness of a base layer is increased to avoid overloads is changed. Under the same traffic flow, overload rate and overload limit, the fatigue service life period of the semi-rigid surface is compared with that of the flexible surface, and therefore when the flexible surface or the semi-rigid surface is adopted is discriminated. According to the method, the traditional method that only the semi-rigid surface is adopted, and the thickness of the base layer is increased to avoid the overloads is changed, and the flexible surface is introduced. Under the same traffic flow, overload rate and overload limit, the fatigue service life period of the semi-rigid surface is compared with that of the flexible surface, and therefore the application range of the flexible surface and the semi-rigid surface is provided. Under the same condition, for the urban road with the large overload rate and overload limit, a flexible surface structure should be adopted by a surface structure, and therefore early damage caused by the overloads is avoided; meanwhile, the cost of later maintenance is reduced, and the fatigue service life period is prolonged.

Description

technical field [0001] The invention relates to the technical field of highway and urban road engineering, in particular to a method for judging the application range of flexible pavement under overload conditions. Background technique [0002] In recent years, in order to solve the increasingly prominent problem of early failure of semi-rigid asphalt pavement caused by overloading, my country began to learn from foreign experience to conduct research on flexible pavements, and built some test roads. The actual situation is different from that of foreign countries. Most of them are heavy and overloaded composite traffic. Therefore, whether the flexible pavement structure can replace the semi-rigid base pavement to deal with the problem of overloading in my country needs to be demonstrated both theoretically and practically. [0003] At present, the overload situation in my country's urban roads and highway transportation is serious. In order to deal with overloading, the meas...

AI Technical Summary

Problems solved by technology

[0005] As for the scope of application of semi-rigid pavement and flexible pavement, there is no systematic research and no systematic discrimination method under different overload rates and overload conditions, resulting in the superior performance of flexible pavement under overload conditions. some recognition

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