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Title:

CHARACTERISTICS OF BASE AND SUBGRADE DRAINAGE OF PAVEMENTS

Accession Number:

00389565

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309036666

Abstract:

Base courses beneath highway and airport pavements that becomes saturated are reduced in modulus and bearing capacity, and pumping may develop at pavement joints. Base-course drainage is often required to preclude this major cause of pavement deterioration. A number of theoretical models for developing design guidelines for drainage requirements of pavements are discussed; the models include the original one by Casagrande and Shannon, which assumed a straight-line phreatic surface and an impermeable subgrade. The influence of subgrade drainage on drainage time and the influence of the use of the more theoretically correct parabolic phreatic surface, especially in deep base courses or on flat slopes, are found to be substantial. New models are developed to include these features and the calculated results are, in general, in good agreement wit field data observed on full-scale pavements. Example calculations are presented to illustrate the effect of subgrade drainage on the drainage time for base courses. (Author)

Supplemental Notes:

Publication of this paper sponsored by Committee on Environmental Factors Except Frost. 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

Monograph Accession #:

01420444

Authors:

Liu, Shang J
Jeyapalan, Jey K
Lytton, Robert L

Editors:

Kaplan, Elizabeth W

Pagination:

pp 1-10

Publication Date:

1983

Serial:

Transportation Research Record

Issue Number: 945
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309036666

Media Type:

Print

Features:

Figures (18) ; References (7)

Old TRIS Terms:

Subject Areas:

Geotechnology; Highways; Pavements; I42: Soil Mechanics

Files:

TRIS, TRB

Created Date:

Oct 30 1984 12:00AM

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