STRUCTURAL DESIGN OF UNSURFACED ROADWAYS AND AIRFIELDS
THE DEVELOPMENT OF A STRUCTURAL DESIGN PROCEDURE USING SOIL AS A SURFACING LAYER FOR ROADWAY AND AIRFIELD PAVEMENTS WAS STUDIED. A REVIEW OF THE LITERATURE REVEALED LIMITED PERTINENT TESTING THAT CONSISTED OF A TOTAL OF 78 FULLSCALE CONTROLLED TESTS CONDUCTED BY THE U. S. ARMY ENGINEER WATERWAYS EXPERIMENT STATION. THE TEST ITEMS WERE GENERALLY 2-LAYER SYSTEMS COMPOSED OF A HIGHER STRENGTH SOIL MATERIAL OVERLYING A WEAKER SOIL LAYER. THESE SOILS WERE OF VARIOUS TYPES, THICKNESSES, AND STRENGTHS (SUBGRADE AND COVER). THEY WERE TESTED UNDER VARIOUS CONDITIONS OF LOAD, TIRE PRESSURE, AND TIRE SIZE. ONLY FAILED ITEMS USED IN SINGLE-WHEEL LOAD TESTS WERE CONSIDERED IN AN ANAYSIS TO DEVELOP EQUATIONS FOR DESIGN OF COVER LAYERS. A MULTIPLE LINEAR REGRESSION ANALYSIS WAS PERFORMED, AND PREDICTION EQUATIONS WERE DEVELOPED FOR THICKNESS, COVERAGE (SERVICE LIFE), SUBGRADE STRENGTH, LOAD, AND TIRE PRESSURE IN TERMS OF THE INDEPENDENT VARIABLES MOST AFFECTING THESE VALUES. THESE PREDICTION EQUATIONS ARE A METHOD OF PRESENTING DESIGN CRITERIA FOR UNSURFACED ROADS AND UNSURFACED AIRFIELDS BASED ON THE RESULTS OF THE FULL- SCALE TESTING. /AUTHOR/
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Supplemental Notes:
- Sponsored by Committee on Theory of Pavement Design. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
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Authors:
- Hammitt II, George M
- Publication Date: 1971
Media Info
- Media Type: Digital/other
- Pagination: pp 96-97
- Monograph Title: Pavement systems
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Serial:
- Highway Research Record
- Issue Number: 362
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Airport runways; Pavement design; Soils; Structural design; Surface course (Pavements)
- Subject Areas: Geotechnology; Highways; Pavements;
Filing Info
- Accession Number: 00205956
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Mar 7 1972 12:00AM