
Accession Number : AD0887071
Title : The Effective Stress Mechanics of Undrained Shear Strength
Descriptive Note : Technical rept. for Jun 1966May 1971
Corporate Author : AIR FORCE WEAPONS LAB KIRTLAND AFB NM
Personal Author(s) : Merkle, Douglas H
PDF Url : AD0887071
Report Date : Jul 1971
Pagination or Media Count : 836
Abstract : On the basis of theory and available experimental data, the influence of stress system (i.e., anisotropy, pore pressure response, rotation of principal planes and the intermediate principal stress) on the undrained shear strength of saturated clay, in terms of effective stress is explained. The developed theory to explain the influence of stress system on the results of model footing test conducted under Project MODIAP at the Massachusetts Institute of Technology is used. The concept of a threedimensional strength surface is developed to explain the variation of shear strength, in terms of effective stress, in a crossanisotropic clay. The concept of a threedimensional pore pressure response surface is developed to explain the variation of pore pressure response in a crossanisotropic clay. It is then shown that the intersection of these two surfaces defines the variation of undrained shear strength with the orientation of the principal stresses at failure.
Descriptors : *CLAY, *FOUNDATIONS(STRUCTURES), *SOIL MECHANICS, CIVIL ENGINEERING, COMPRESSIVE PROPERTIES, FAILURE(MECHANICS), MECHANICAL PROPERTIES, MOISTURE, PLASTIC PROPERTIES, POROSITY, STRAIN(MECHANICS), STRESSES, TABLES(DATA), THESES, TRAFFICABILITY
Subject Categories : Soil Mechanics
Distribution Statement : APPROVED FOR PUBLIC RELEASE