Accession Number : ADA199628

Title :   Anisotropy and Stress Path Effects in Clays with Applications to the Pressuremeter Test.

Descriptive Note : Final rept. 1 Mar 87-31 May 88.

Corporate Author : PURDUE UNIV LAFAYETTE IN SCHOOL OF CIVIL ENGINEERING

PDF Url : ADA199628

Report Date : 31 Jul 1988

Pagination or Media Count : 141

Abstract : The research study undertaken at Purdue focuses towards increasing our understanding of fundamental issues related to the behavior of clays, especially with regard to modelling their anisotropy. The information being developed is applicable to most geotechnical problems, however, in illustrating their usefulness, emphasis is placed on interpretation of in situ tests, and in particular pressuremeter and self-boring pressuremeter (SBPM) tests. There is ample evidence that in situ soils are anisotropic, elasto-plastic, stress path and rate dependent, unlike what is generally assumed in test interpretations. Therefore, the study of mechanisms of deformation of in situ tests and their interpretation must take into account these features, and especially the anisotropic nature of the soil deposit. A simple and reliable anisotropic theory will be most useful in the study of several important factors related to pressuremeter testing such as possibility of radial cracking, role of vertical stress, stress conditions at failure, and the effects of initial disturbance which cannot be measured. It will also be possible to estimate undrained strength of the clay in other modes of failure using SBPM data only. (kr)

Descriptors :   *ANISOTROPY, *CLAY, *STRESS ANALYSIS, BEHAVIOR, CRACKING(FRACTURING), DEFORMATION, DEPOSITS, FAILURE, PATHS, RELIABILITY, SOILS, STRESSES, THEORY, VERTICAL ORIENTATION

Subject Categories : Geology, Geochemistry and Mineralogy

Distribution Statement : APPROVED FOR PUBLIC RELEASE