COMPTES RENDUS DU DIXIEME CONFERENCE EUROPEENNE DE MECANIQUE DES SOLS ET DES TRAVAUX DE FONDATIONS l FLORENCE l 26-30 MAI1991

DEFORMATION DU SOL ET DEPLACEMENTS DES STRUCTURES

XCEMSTF

Rédacteur

ASSOCIAZIONE GEOTECNICA ITALIANA

VOLUME4 Séance d'ouverture l Rapport généra/ l Conférences sur invitation l Discussions l Séance

de cloture l Contributions italiennes l SIMSF Vice President pour I'Europe: Rapport 1991 l Divers

A.A. BALKEMA l ROTTERDAM l BROOKFIELD l 1994

.M-12Zo

PROCEEDINGS OFTHE TENTH EUROPEAN CONFERENCE ON SOl L MECHANICS ANO FOUNDATION ENGINEERING l FLORENCE l 26-30 MAY 1991

DEFORMATION OF SOILS ANO DISPLACEMENTS OF STRUCTURES

XECSMFE

Editor

ASSOCIAZIONE GEOTECNICA ITALIANA

VOLUME4 Opening session l Generai report l lnvited lectures l Discussions l Closing session l ltalian contributions l

JSSMFE Vice President for Europe: Report 1991 l Miscellaneous

A.A. BALKEMA l ROTTERDAM l BROOKFI ELD l 1994

1

2 R.Frank

3 K. H. Andersen K. H0eg

B. D'Elia

R. Dobry

G.T. Houlsby

Preface Préface

Contents Table des matières

Organization of the conference Organisation de la conférence

Sponsorships Parrainage

Geotechnical engineering exhibition L'exposition de l'inginiérie géotechnique

Conference programma Programme de la conférence

Photographic report Rapport photographique

Opening session Séance d'ouverture

Opening session Séance d'ouverture

Generai report Rapport général

Some recent developments on the behaviour of shallow foundations Quelques developpements récents sur le comportement des fondations superficielles

lnvited lectures Conférences sur invltation

Deformations of soils and displacements of structures subjected to combined static and cyclic loads Déformations des sols et déplacements des structures sujets aux chargements combinés statiques et cycliques

Deformation problems in the ltalian structurally complex clay soils

Soil properties and earthquake ground response Propriétés géotechniques et réponse des sols aux tremblements de terre

How the dilatancy of soils affects their behaviour De la manière doni la dilatance des sols influence leur comportement

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4 Discussions Discussions

Session l Séance 1 Experimental determination of soil properties (stress-strain-time) Détermination expérimentale des paramètres caractéristiques du sol ( contraintes-déformations-temps)

G. Baldi

Y. Tanaka

T. Edil

R.J. Jardine

K. Charif P.Y. Hicher

F. Tatsuoka

A. Pecker

D. Lo Presti

B.Simpson

J. S. Steenfelt

L. Trauner

L. Trauner

V. N. Ghionna M. Jamiolkowski

M. Manassero

R. Frank

R.J. Jardine

P. Carrubba M. Maugeri

1 a Laboratory testing Epreuves de laboratoire

Developments in laboratory testing

Deformation control and acoustic emission

Local measurements of interface strains

Local strain measuring techniques and their practical applications

lnfluence de l'anisotropie sur les propriétés élastiques d'un sable

Discussion on measurement of static deformation moduli in dynamic tests

Comparaison entre module statique et module dynamique sur un sable

Behaviour of sand at small strain

lnterpretation of test results to evaluate design parameters

Evaluation of test results for design

lnformation about quick process guided tests

A way of implementation of probability calculus in soil mechanics

1 b ln-situ testing Epreuves sur piace

lnfluence of ti me on the behaviour of granular soils

Assessment of the earth pressure at rest coefficient (K0 ) in sand deposits

Modules pressiométriques pour calculer les déplacements des fondations profondes

Non-linear interpretations of in-situ stiffness measurements

ln-situ and laboratory evaluation of initial shear modulus fora clay

Session l Séance 2 Modelling stress-strain-time behaviour of natural soils

J. Logar

J. Mecsi

H. M. Jacobsen

R. Dobry

D. Lo Presti

K. Yasohara

VIli

Relations contraintes-déformations-temps pour les sols naturels

2a Monotonic loading Charges monotoniques

Use of strain isotaches in the consolidation analysis

Stresses, displacements, volume changes around the expansion cyclinder in the soil- A condensed version with some additions to the lecture

2b Cyclic loading Charges cycliques

Behaviour of sand during earthquake or wave loading

Pore pressure development during cyclic shear loading

Threshold strain in soils

Drainage effect importance in cyclic behaviour of clay

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M. P. Luong

A.O. Uriel

K. Axelsson

C. Carrubba M. Maugeri

Energy dissipating capacity of soils 1289

Behaviour of a physical and conceptual model based on an extension of Masing's 1293 modelto2-D

Determination of constitutive parameters for soils based on optimization

Threshold strain limits of two natural clays

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Session l Séance 3 Displacements and soil-structure interaction: Shallow and deep foundations Déplacements et interaction sol-structure: Fondations superficielles et profondes

3a Shallow foundations 1303 Fondations superficielles

S. Nordal A multy story building and its foundation mat 1307

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G. Bouckovalas

D.Luger

L. Trauner

S. Amar

R.J. Jardine

V. Caputo

C. N. Baker, Jr.

E. Falk

M. Maugeri F. Castelli E. Motta

Ekofisk tank: Performance prediction during the storm of Nov. 6, 1973

Soil-water-structure interaction

About shallow hinge-tied foundation 1324

3b Deep foundations 1325 Fondations profondes

Prévision des déplacements verticaux et horizontaux des pieux à partir de l'essai 1325 pressiométrique Ménard

The effects of soil non-linearity and effective stress states on the 1334 load-displacement behaviour of piles and pile groups

Equivalent elastic analysis of settlement for piled foundations 1346

Discussion on piled rafts

Lifting of structures using soilfrac: Application of an active foundation method

Non-linear single pile settlements

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Sesslon l Séance 4 Displacements and soil-structure interaction: Earth retaining structures and deep excavations

G.Sembenelli

K. Kiein

K.C. Brady

M. Bastick

W Steiner

Déplacements et interaction sol-structure: Structures de soutènement et excavations profondes

4a Earth retaining structures Structures de soutien

Deformations and factor of safety in high reinforced soil structures

4b Underground retaining structures and deep excavations Fouilles et structures en souterrain

Horizontal deformations at 47 m deep bentonite-cement slurry diaphragm wall

Serviceability limit states for reinforced soil structures

Stresses and strains in a reinforced earth experimental abutment

Use of monitoring

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Session l Séance 5 Displacements and soil-structure interaction: Special problems (Earthquakes, subsidence, landslides, etc.)

T. B. Edil

J. D. Nieuwenhuis

M. Bastick

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N. Janbu

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Déplacements et interaction sol-structure: Problèmes spéciaux (Tremblements de terre, affaissements, éboulements, etc.)

Sa Static loading conditions Conditions statiques

Discussion of issues raised on creep

Remedial measures for shallow naturallandslides

Sb Dynamic loading conditions Conditions dynamiques

Seismic design of reinforced earth

Closing session Séance de cloture

Closing session Séance de clòture

Stress-strain-time behaviour of porous media: A case history based review Le comportement de contraintes-deformations-temps des milieux poreux: Une revue basée sur des cas pratiques

ltalian contributlons Contrlbutlons ltallennes

Associazione The Leaning Tower of Pisa- Present situation Geotecnica Italiana

P. Billi G. Losito M. Muschietti

T. Crespellani G. Vannucchi X.Zeng

A. Vignoli

R. Lugli

P. Billi

T. Crespellani A. Ghinelli C. Madiai G. Vannucchi

T. Crespellani G. Vannucchi

T. Crespellani C. Madiai

T. Crespellani G. Vannucchi A. Vignoli

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Selsmic hazards and slte effects in the Florence area

1. Geologica! setting, tectonic evolution and related seismic activity

2. Seismic hazard analysis

3. Definition of the ground motion in f irm soil

4. Geographical setting, built-up milieu and urban development

5. Geology

6. Stratigraphical profiles and geotechnical properties

7. Dynamic properties of soils

8. Seismic response analysis

9. Uncertainties analysis and final remarks

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ISSMFE Vice President for Europe: Report 1991 SIMSF Vice president pour l'Europa: Rapport 1991

Miscellaneous Divers

List of delegates Liste des participants

lndex of authors lndex des auteurs

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