Shoulder moisture balance analyses are applied to obtain a better understanding of the conditions under which it is unlikely that water will enter a road pavement or subgrade as a result of infiltration through the surface of the shoulder. Simple equations applied consistently describe the most important features of infiltration, evaporation, redistribution and drainage of shoulder water and these are combined to study how the degree of accumulation of shoulder water varies throughout periods of daily records of climate. The main study is preceded by rigorous mathematical analysis for a single period of rainfall and surface pondage. This rigorous analysis illustrates how shoulder infiltration will not be a problem if the combined duration of rainfall plus ponding is much less than the time required for resaturation of the upper 100 mm of the shoulder. It also shows the relative influence of shoulder permeability, surface ponding and subdrainage efficiency. It is concluded that there can be no simple index of the relative severity of wet seasons for all shoulder conditions. /Author/TRRL/

  • Corporate Authors:

    James Cook University of North Queensld, Australia

    Department of Civil and Systems Engineering
    Townsville, Queensland 4811,   Australia 
  • Authors:
    • WALLACE, K B
    • Cooper, R A
    • Leonardi, F
  • Publication Date: 1977-6

Media Info

  • Features: References;
  • Pagination: 97 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00184466
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Interim Road Rep 13 Monograph
  • Files: ITRD, TRIS
  • Created Date: Jan 13 1979 12:00AM