CEN ISO/TS 17892-5:2004

Geotechnical investigation and testing - Laboratory testing of soil - Part 5: Incremental loading oedometer test (ISO/TS 17892-5:2004)

ISO/TS 17892-5:2004 is intended for determination of the compression, swelling and consolidation properties of soils. The cylindrical test specimen is confined laterally, is subjected to discrete increments of vertical axial loading or unloading and is allowed to drain axially from the top and bottom surfaces.
The main parameters derived from the oedometer test relate to the compressibility and rate of primary consolidation of the soil. Estimates of preconsolidation pressure, rate of secondary compression, and swelling characteristics are sometimes also obtainable.
The main parameters which can be derived from the oedometer test carried out on undisturbed samples are:
1) compressibility parameters;
2) coefficient of consolidation;
3) apparent preconsolidation pressure or yield stress;
4) coefficient of secondary compression;
5) swelling parameters.
The fundamentals of the incremental loading oedometer test include: stress path corresponds to one-dimensional straining; drainage is one-dimensional and axial.
The stress paths and drainage conditions in foundations are generally three dimensional and differences can occur in the calculated values of both the magnitude and the rate of settlement.
The small size of the specimen generally does not adequately represent the fabric features present in natural soils.
Analysis of consolidation tests is generally based on the assumption that the soil is saturated. In case of unsaturated soils, some of the derived parameters may have no physical meaning.

Geotechnische Erkundung und Untersuchung - Laborversuche an Bodenproben - Teil 5: Oedometerversuch mit stufenweiser Belastung (ISO/TS 17892-5:2004)

Reconnaissance et essais géotechniques - Essais de laboratoire sur les sols - Partie 5: Essai de chargement par paliers à l'oedomètre (ISO/TS 17892-5:2004)

L'ISO 17892-5:2004 a pour objet la détermination des propriétés de consolidation, de gonflement et de consolidation des sols. L'éprouvette d'essai cylindrique est confinée latéralement et soumise à un chargement ou déchargement vertical et axial par paliers, tout en étant drainée axialement par le haut et par le bas.
Les principaux paramètres déduits de l'essai oedométrique fournissent la compressibilité et le taux de consolidation primaire du sol. Des estimations de la contrainte de préconsolidation, du coefficient de consolidation secondaire et des paramètres de gonflement sont également parfois possibles.
Les principaux paramètres pouvant être déduits de l'essai oedométrique réalisé sur des échantillons non remaniés sont:
1) les paramètres de compressibilité;
2) le coefficient de consolidation;
3) la contrainte apparente de préconsolidation ou la résistance du matériau;
4) le coefficient de consolidation secondaire;
5) les paramètres de gonflement.
Les principes de l'essai oedométrique à chargement par paliers sont les suivants: le chemin de contraintes correspond à une déformation unidimensionnelle, le drainage est axial et unidimensionnel.
Les chemins de contraintes et les conditions de drainage sous des fondations sont généralement tridimensionnels et des différences peuvent apparaître au niveau des valeurs calculées pour le tassement ou pour sa vitesse.
La petite dimension de l'éprouvette ne permet généralement pas de représenter correctement les hétérogénéités présentes dans les sols naturels.
L'analyse d'un essai de consolidation repose généralement sur l'hypothèse que le sol est saturé. Dans le cas de sols non saturés, certains paramètres déduits de l'essai peuvent ne pas avoir de signification physique.

Geotehnično preiskovanje in preskušanje – Laboratorijsko preskušanje zemljin – 5. del: Edometrski preskus s postopnim obremenjevanjem (ISO/TS 17892-5:2004)

Ta dokument je namenjen ugotavljanju stisljivosti, nabrekljivosti in konsolidacije zemljin. Vzorec za preskus z valjem je bočno omejen, obremenjevanje ali razbremenjevanje poteka postopoma z navpične osi, drenaža pa poteka osno z vrhnje in spodnje površine. Glavni parametri, pridobljeni z edometrskim preskusom, so povezani s stisljivostjo in hitrostjo primarne konsolidacije zemljine. Včasih se lahko pridobijo tudi ocene predkonsolidacijskega tlaka, hitrosti sekundarne stisljivosti in značilnosti nabrekanja. Glavni parametri, ki se lahko pridobijo iz edometrskega preskusa, opravljenega na nespremenjenih vzorcih, so:  1) parametri stisljivosti; 2) koeficient konsolidacije 3) navidezni predkonsolidacijski tlak ali napetost tečenja; 4) koeficient sekundarne stisljivosti; 5) parametri nabrekanja. Osnove edometrskega preskusa s postopnim obremenjevanjem vključujejo naslednje: - napetostna pot ustreza enodimenzionalni deformaciji; - drenaža je enodimenzionalna in osna. Napetostne poti in pogoji drenaže v podlagah so ponavadi tridimenzionalni, zato lahko prihaja do razlik pri izračunanih vrednostih v obsegu in hitrosti posedanja. Majhna velikost vzorca ponavadi ne predstavlja primerno lastnosti materiala v naravnih zemljinah. Analiza konsolidacijskih preskusov v splošnem temelji na domnevi, da je zemljina zasičena. V primeru nezasičenih zemljin nekateri dobljeni parametri morda nimajo fizikalnega pomena.

General Information

• Status: Withdrawn
• Publication Date: 14-Oct-2004
• Withdrawal Date: 21-Mar-2017
• ICS: 13.080.20 - Physical properties of soils
• ICS: 93.020 - Earthworks. Excavations. Foundation construction. Underground works
• Technical Committee: CEN/TC 341 - Geotechnical Investigation and Testing
• Drafting Committee: CEN/TC 341 - Geotechnical Investigation and Testing
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 22-Mar-2017
• Ref Project: SIST-TS CEN ISO/TS 17892-5:2004 - Geotechnical investigation and testing - Laboratory testing of soil - Part 5: Incremental loading oedometer test (ISO/TS 17892-5:2004)

Relations

• Replaced By: EN ISO 17892-5:2017 - Geotechnical investigation and testing - Laboratory testing of soil - Part 5: Incremental loading oedometer test (ISO 17892-5:2017)
• Effective Date: 08-Jun-2022
• Corrected By: CEN ISO/TS 17892-5:2004/AC:2005 - Geotechnical investigation and testing - Laboratory testing of soil - Part 5: Incremental loading oedometer test (ISO/TS 17892-5:2004)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2004
*HRWHKQLþQRSUHLVNRYDQMHLQSUHVNXãDQMH±/DERUDWRULMVNRSUHVNXãDQMH]HPOMLQ±
GHO(GRPHWUVNLSUHVNXVVSRVWRSQLPREUHPHQMHYDQMHP,6276
Geotechnical investigation and testing - Laboratory testing of soil - Part 5: Incremental
loading oedometer test (ISO/TS 17892-5:2004)
Geotechnische Erkundung und Untersuchung - Laborversuche an Bodenproben - Teil 5:
Oedometerversuch mit stufenweiser Belastung (ISO/TS 17892-5:2004)
Reconnaissance et essais géotechniques - Essais de laboratoire sur les sols - Partie 5:
Essai de chargement par paliers a l'oedometre (ISO/TS 17892-5:2004)
Ta slovenski standard je istoveten z: CEN ISO/TS 17892-5:2004
ICS:
13.080.20 Fizikalne lastnosti tal Physical properties of soils
93.020 Zemeljska dela. Izkopavanja. Earthworks. Excavations.
Gradnja temeljev. Dela pod Foundation construction.
zemljo Underground works
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL SPECIFICATION
CEN ISO/TS 17892-5
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
October 2004
ICS 13.080.20; 93.020
English version
Geotechnical investigation and testing - Laboratory testing of
soil - Part 5: Incremental loading oedometer test (ISO/TS 17892-
5:2004)
Reconnaissance et essais géotechniques - Essais de sol Geotechnische Erkundung und Untersuchung -
au laboratoire - Partie 5: Essai à l'oedomètre sur sol saturé Laborversuche an Bodenproben - Teil 5:
(ISO/TS 17892-5:2004) Oedometerversuch mit stufenweiser Belastung (ISO/TS
17892-5:2004)
This Technical Specification (CEN/TS) was approved by CEN on 2 December 2003 for provisional application.
The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the CEN/TS can be converted into a European Standard.
CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available
promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS)
until the final decision about the possible conversion of the CEN/TS into an EN is reached.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN ISO/TS 17892-5:2004: E
worldwide for CEN national Members.

Contents
Foreword.4
1 Scope .6
2 Normative references .6
3 Terms and definitions .7
4 Symbols .7
5 Equipment .8
5.1 Requirements.8
5.2 Calibration .11
5.3 Environment.12
6 Test procedure.12
6.1 General requirements.12
6.2 Specimen preparation .12
6.3 Measurement and protection.13
7 Test results.17
7.1 General.17
7.2 Initial values .17
7.3 Compressibility characteristics .18
8 Test report .19
8.1 Mandatory reporting.19
8.2 Optional reporting.19
Annex A (informative) Additional calculations.21
A.1 Additional symbols.21
A.2 Soil condition .22
A.3 Compressibility parameters .22
A.4 Swelling parameters.24
Bibliography .30

Figures
Figure 1 — General arrangements of typical oedometer cells .9
Figure 2 — Typical plot of void ratio against vertical effective stress.16
Figure A.1 — Change of effective stress and vertical strain for incremental loading and unloading.23
Figure A.2 — Change of effective stress and void ratio for incremental loading and unloading.23
Figure A.3 — Laboratory consolidation curve: example of log time fitting method .25
Figure A.4 — Laboratory consolidation curve: example of square root of time fitting method .26
Figure A.5 — Temperature correction curve for coefficient of consolidation .27
Figure A.6 — Derivation of coefficient of secondary compression C .28
αα
αα
Figure A.7 — Determination of the apparent preconsolidation pressure σσ' .29
σσ
p
Tables
Table 1 — Suggested initial pressure.14
Foreword
This document (CEN ISO/TS 17892-5:2004) has been prepared by Technical Committee CEN/TC 341
“Geotechnical investigation and testing”, the secretariat of which is held by DIN, in collaboration with Technical
Committee ISO/TC 182 “Geotechnics”.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to announce this Technical Specification: Austria, Belgium, Cyprus, Czech Republic, Denmark,
Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
CEN ISO/TS 17892 consists of the following parts, under the general title Geotechnical investigation and testing —
Laboratory testing of soil:
 Part 1: Determination of water content
 Part 2: Determination of density of fine grained soil
 Part 3: Determination of particle density - Pycnometer method
 Part 4: Determination of particle size distribution
 Part 5: Incremental loading oedometer test
 Part 6: Fall cone test
 Part 7: Unconfined compression test on fine grain soils
 Part 8: Unconsolidated undrained triaxial test
 Part 9: Consolidated triaxial compression tests on water saturated soils
 Part 10: Direct shear tests
 Part 11: Determination of permeability by constant and falling head
 Part 12: Determination of the Atterberg limits
Introduction
This document covers areas in the international field of geotechnical engineering never previously standardised. It
is intended that this document presents broad good practice throughout the world and significant differences with
national documents is not anticipated. It is based on international practice (see [1]).
1 Scope
This document is intended for determination of the compression, swelling and consolidation properties of soils. The
cylindrical test specimen is confined laterally, is subjected to discrete increments of vertical axial loading or
unloading and is allowed to drain axially from the top and bottom surfaces.
The main parameters derived from the oedometer test relate to the compressibility and rate of primary
consolidation of the soil. Estimates of preconsolidation pressure, rate of secondary compression, and swelling
characteristics are sometimes also obtainable.
The main parameters which can be derived from the oedometer test carried out on undisturbed samples are:
1) compressibility parameters;
2) coefficient of consolidation;
3) apparent preconsolidation pressure or yield stress;
4) coefficient of secondary compression;
5) swelling parameters.
The fundamentals of the incremental loading oedometer test include:
 stress path corresponds to one-dimensional straining;
 drainage is one-dimensional and axial.
The stress paths and drainage conditions in foundations are generally three dimensional and differences can occur
in the calculated values of both the magnitude and the rate of settlement.
The small size of the specimen generally does not adequately represent the fabric features present in natural soils.
Analysis of consolidation tests is generally based on the assumption that the soil is saturated. In case of
unsaturated soils, some of the derived parameters may have no physical meaning.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references,
only the edition cited applies. For undated references, the latest edition of the referenced document (including any
amendments) applies.
prEN 1997-2, Eurocode 7 - Geotechnical design — Part 2: Ground investigation and testing.
CEN ISO/TS 17892-1, Geotechnical investigation and testing — Laboratory testing of soil — Part 1: Determination
of water content (ISO/TS 17892-1:2004).
CEN ISO/TS 17892-2, Geotechnical investigation and testing — Laboratory testing of soil — Part 2: Determination
of density of fine grained soil (ISO/TS 17892-2:2004).
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
excess pore pressure
pore water pressure over and above the equilibrium pore pressure at the end of consolidation
3.2
primary consolidation
process whereby soil compresses as a result of an increase (or decrease) in effective stress due to dissipation of
excess pore pressure under constant total applied stress accompanied by drainage of water from the voids
3.3
secondary consolidation
process in which compression occurs after full excess pore pressure dissipation
3.4
swelling
expansion due to reduction of effective stress
NOTE Swelling includes both the reverse of compression and the reverse of consolidation.
3.5
undisturbed sample
normally a sample of quality class 1 according to prEN 1997-2
4 Symbols
For the purposes of this document, the following symbols apply.
A Cross-sectional area of specimen.
e Void ratio, i.e. volume of pores relative to volume of solid particles.
e Original void ratio, i.e. void ratio of the specimen at the start of the test.
e Void ratio of the specimen at the end of an increment: this is the void ratio of the specimen at the start of the
f
next increment.
D Diameter of the oedometer ring.
H Height of the specimen.
H Original height, i.e. height of the specimen at the start of the test: this is normally taken as the depth of the
oedometer ring.
H Initial height, i.e. height of the s
...