Accession Number : ADA019503

Title :   Investigation of K(o) Testing in Cohesionless Soils

Descriptive Note : Final rept.

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS

Personal Author(s) : Al-Hussaini, Mosaid M ; Townsend, Frank C

PDF Url : ADA019503

Report Date : Dec 1975

Pagination or Media Count : 76

Abstract : The ratio of horizontal to vertical effective stress when lateral yielding is prevented is known as the coefficient of earth pressure at rest and is denoted by the symbol K(o). K(o) values and the stress-strain response of soils under conditions of lateral restraint are important engineering quantities for problems involving settlement of large fills, lateral pressures on retaining structures, and yielding around excavations. In this report, four laboratory techniques and devices for experimentally determining K(o) values and the stress-strain relationships of Reid-Bedford sand are examined. These methods are: the linear variable displacement transducer (LVDT) clamp, the K(o) belt, swinging arms lateral strain sensors, and an indirect volume change method using a burette. The tests were conducted at three relative densities, 25, 75, and 100 percent, using modified triaxial compression chambers.

Descriptors :   *SOIL TESTS, *SOILS, FIELD TESTS, LABORATORY TESTS, SOIL DYNAMICS, STRESS STRAIN RELATIONS, TRIAXIAL STRESSES

Subject Categories : Soil Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE