This method allows the design a structure resistant to both multiple applications of loads and of natural factors which is at the same time economically effective. The ability of asphalt pavement structure to resist well the load action is estimated by means of three criteria considering both the work of each layer and of the whole structure. The design is made for each layer and the criterion for evaluation of a layer is chosen depending on a degree of layer discreteness. The design of asphalt concrete pavements and other monolithic layers is performed on the basis of the criterion of "bending tensile strength" in order to keep them from fatigue crack formation. The design of subgrade soil and discrete layers is made according to the criterion of "shear resistance" to prevent them from permanent deformations. The whole structure is designed on the basis of elastic deflection in order to avoid its degradation under multiple moving loads. A method based on the above mentioned criteria is developed for designing the road pavements, which should have practically reversible (elastic) deformations under service loads. The report contains formulae for determination of stresses and strains arising in different layers as well as for establishing their admissable values. The experimental data which show the acceptability level of the formulae are given. The relationships for determination of actual and required frost-resistance as well as those for determination of drainage capability are presented, along with description of the basic principles of design automation and search for an optimum decision. Reliability of structures designed by the new method is demonstrated. An example of flexible pavement design under adverse soil and hydrological conditions is given.

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 389-401

Subject/Index Terms

Filing Info

  • Accession Number: 00170225
  • Record Type: Publication
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Mar 14 1978 12:00AM