00713472

Component

One objective of a site and soil characterization program is to determine pertinent engineering properties, including the state of stress, stress history, and basic mechanical soil properties such as consolidation and strength characteristics. This is best done in the laboratory since boundary conditions and strain rates can be controlled. Laboratory test equipment and procedures for evaluating the consolidation and stress-strain-strength properties of saturated overconsolidated (OC) clays are described. A distinction is made between the state of the art and the state of the practice with respect to equipment and test methods. An overview is given of common laboratory equipment for determining these properties. Background is provided on preconsolidation pressure mechanisms and respective stress history profile characteristics. Guidance is offered on strength parameter selection for OC clays, which includes stability class, soil behavior issues, and methods for reducing the effects of sample disturbance. General procedures are given for performing one-dimensional consolidation tests on OC clays and estimating values of preconsolidation pressure and the coefficient of earth pressure at rest. Recommendations are given on evaluating and analyzing strength data, and it is concluded that obtaining reliable engineering properties for OC clays requires a comprehensive knowledge of deposition mechanisms, soil behavior, and appropriate experimental procedures.

This paper appears in Transportation Research Record No. 1479, Engineering Properties and Practice in Overconsolidated Clays.

English

p. 17-25

1995

Transportation Research Record

0309061172

Figures (3) ; References (42) ; Tables (2)

Clay; Coefficients; Deformation curve; Earth pressure; Laboratory tests; Overconsolidation; Preconsolidation pressure; Properties of materials; Soil consolidation test; Strength of materials; Test procedures; Testing equipment

Earth pressure at rest

Geotechnology; Highways; Materials; I41: General Soil Surveys; I42: Soil Mechanics

TRIS, TRB

Nov 29 1995 12:00AM

• CHARACTERIZATION OF PRECONSOLIDATED SOILS IN RICHMOND, VIRGINIA
• DESIGN PRACTICES IN OVERCONSOLIDATED CLAYS OF NEW YORK
• ENGINEERING PROPERTIES OF OVERCONSOLIDATED PLEISTOCENE SOILS OF TEXAS GULF COAST
• GEOTECHNICAL BEHAVIOR OF OVERCONSOLIDATED SURFICIAL CLAY CRUSTS
• GEOTECHNICAL ENGINEERING PRACTICE IN OVERCONSOLIDATED CLAYS, SAN DIEGO, CALIFORNIA
• IN SITU TESTING IN OVERCONSOLIDATED CLAYS
• ISSUES AND TECHNIQUES FOR SAMPLING OVERCONSOLIDATED CLAYS
• MEASUREMENT OF DRAINED RESIDUAL STRENGTH OF OVERCONSOLIDATED CLAYS
• OVERCONSOLIDATED GLACIAL TILLS IN EASTERN WISCONSIN
• OVERVIEW OF STATE-OF-THE-PRACTICE MODELING OF OVERCONSOLIDATED SOILS
• PROFILING YIELD STRESSES IN CLAYS BY IN SITU TESTS
• U.S. STATE OF THE PRACTICE IN SAMPLING AND STRENGTH TESTING OF OVERCONSOLIDATED CLAYS