00470961

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http://onlinepubs.trb.org...trr/1987/1137/1137-001.pdf

https://scholar.google.co...rdjo&publication_year=1987

Highway construction is commonly required in arid regions. Soils in these regions are generally unsaturated and are characterized by highly negative pore-water pressures. An extension of saturated soil mechanics principles is required to fully understand their behavior and to perform the necessary analyses for engineering purposes. In recent years there has been a rapid increase in understanding of the behavior of unsaturated soils. Conventional equations for shear strength, volume change, and seepage have been extended to embrace unsaturated soils. Presented in this paper is a summary of unsaturated soil principles and theories particularly relevant to highway design in arid regions. The application of these theories to highway engineering is outlined. In addition, several techniques commonly used to measure soil suction or negative pore-water pressure are discussed. The measurement of soil suction is central to applying unsaturated soil theories.

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

01418180

pp 1-11

1987

Transportation Research Record

0309045134

Print

Figures (14) ; Maps (2) ; References (20) ; Tables (2)

Arid land; Equations; Highway engineering; Measurement; Pore pressure; Pore water pressures; Seepage; Shear strength; Soil mechanics; Soil suction; Unsaturated soils; Volume changes

Geotechnology; Highways; Hydraulics and Hydrology; I42: Soil Mechanics

TRIS, TRB, ATRI

Aug 31 1988 12:00AM

• BEHAVIOR AND DESIGN OF VERTICAL MOISTURE BARRIERS
• CHARACTERIZATION OF CONSTRAINED SWELLING OF CLAY
• CHARACTERIZATION OF THE METEOROLOGICAL DEMAND FOR THE DESIGN OF VERTICAL MOISTURE BARRIERS
• COEFFICIENT OF SUBGRADE REACTION FOR FOOTINGS ON DESERT SANDS
• ROADWAY PERFORMANCE IN AN EXPANSIVE CLAY
• SOIL SUCTION MEASUREMENTS AT SEVERAL SITES IN WESTERN CANADA
• THE EFFECT OF CLIMATE ON EXPANSIVE SOILS SUPPORTING ON-GRADE STRUCTURES IN A DRY CLIMATE
• USING NONDESTRUCTIVE TESTING IN THE SEMI-ARID ZONE OF PERU