RefDoc
Haut

Faire une nouvelle recherche
Make a new search
Lancer la recherche


Titre du document / Document title

Estimating critical state soil mechanics parameters from shear box tests

Auteur(s) / Author(s)

KIRBY J. M. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) CSIRO Land and Water, GPO Box 1666, Canberra, ACT 2601, AUSTRALIE

Résumé / Abstract

Prediction of compaction, tillage, root growth or other soil deformation events requires a description of the stress-strain properties of the soil such as the critical state model, but estimating the parameters is time consuming and expensive. I have developed a method of estimating critical state properties from a single shear box test, both saving much labour and providing more information than traditional analyses. The method is based on critical state analyses of the constant stress and constant volume shear box tests using the total stresses applied at the boundary. It derives the critical state property parameters from test data by minimizing the difference between test data and the simulated soil deformation (and hence the properties used in that simulation). The minimization is a form of regression analysis. The analyses resulted in good simulations of the history of states in space defined by τxy, γxy and e space (constant stress test) or τxy, γxy and σy space (constant volume test). For normally consolidated samples, the analysis of a single constant stress test provided estimates of the slope of the critical state line (M), the slope of the virgin compression line (λ), the slope of the rebound line (κ), and the elastic modulus (E). The standard deviation of the estimate of κcould not be found. By contrast, the analysis of the constant volume test resulted in poor estimates, particularly of λ. This is because the test yields no information on changes of volume during deformation: hence volume change parameters are not successfully estimated. The constant volume test is therefore not suitable for back analysis.

Revue / Journal Title

European journal of soil science    ISSN  1351-0754 

Source / Source

1998, vol. 49, no3, pp. 503-512 (21 ref.)

Langue / Language

Anglais

Editeur / Publisher

Blackwell, Oxford, ROYAUME-UNI  (1994) (Revue)

Mots-clés anglais / English Keywords

Data analysis

;

Regression analysis

;

Mechanical stress

;

Mechanical deformation

;

Shear test

;

Soil test

;

Parameter estimation

;

Critical state

;

Soil mechanics

;

Statistical method

;

Physical parameter

;

Mathematical model

;

Experimental study

;

Method study

;

Model study

;

Simulation

;

Unsaturated soil

;

Agricultural soils

;

Experimentation

;

Applied mathematics

;

Mechanical properties

;

Soil science

;

Mots-clés français / French Keywords

Analyse donnée

;

Analyse régression

;

Contrainte mécanique

;

Déformation mécanique

;

Essai cisaillement

;

Essai sol

;

Estimation paramètre

;

Etat critique

;

Mécanique sol

;

Méthode statistique

;

Paramètre physique

;

Modèle mathématique

;

Etude expérimentale

;

Etude méthode

;

Etude sur modèle

;

Simulation

;

Sol non saturé

;

Sol agricole

;

Expérimentation

;

Mathématiques appliquées

;

Propriété mécanique

;

Science du sol

;

Mots-clés espagnols / Spanish Keywords

Análisis datos

;

Análisis regresión

;

Tensión mecánica

;

Deformación mecánica

;

Ensayo cortante

;

Ensayo suelo

;

Estimación parámetro

;

Estado crítico

;

Mecánica suelo

;

Método estadístico

;

Parámetro físico

;

Modelo matemático

;

Estudio experimental

;

Estudio método

;

Estudio sobre modelo

;

Simulación

;

Suelo no saturado

;

Suelos agrícolas

;

Experimentación

;

Matemáticas aplicadas

;

Propiedad mecánica

;

Ciencia del suelo

;

Localisation / Location

INIST-CNRS, Cote INIST : 2402, 35400007072615.0160

Nº notice refdoc (ud4) : 1579697



Faire une nouvelle recherche
Make a new search
Lancer la recherche
Bas