In Situ Testing in Geomechanics

The Main Tests

By Fernando Schnaid

© 2009 – CRC Press

352 pages

Purchasing Options:
Paperback: 9780415433860
pub: 2008-12-15
US Dollars$68.95
Hardback: 9780415433853
pub: 2008-12-15
US Dollars$188.95

About the Book

Demanding a thorough knowledge of material behaviour and numerical modelling, site characterisation and in situ test interpretation are no longer just basic empirical recommendations.

Giving a critical appraisal of the understanding and assessment of the stress-strain-time and strength characteristics of geomaterials, this book explores new interpretation methods for measuring properties of a variety of soil formations.

Emphasis is given to the five most commonly encountered in situ test techniques:

  • standard penetration tests
  • cone penetration tests
  • vane test
  • pressuremeter tests
  • dilatometer tests

Ideal for practising engineers in the fields of geomechanics and environmental engineering, this book solves numerous common problems in site characterisation. It is also a valuable companion for students coming to the end of their engineering courses and looking to work in this sector.

Table of Contents




List of symbols


General considerations

Codes of practice

Interpretation methods

Scope and purposes

Standard penetration test (SPT)

General considerations

Standards and procedures

Wave propagation analysis

Measurements and corrections

Characterization and classification

Soil properties in granular materials

Soil properties in cohesive materials

Soil properties in bonded soils

Soil properties in weak rock

Direct design methods

Soil liquefaction

Concluding remarks


Piezocone penetration test (CPTU)

Equipment and procedures

New developments

Specifications and standards

Test results

Soil classification

Interpretation methods

Soil properties in cohesive materials

Granular soils

Properties in silty soils

Properties in bonded geomaterials

Pile bearing capacity



Vane test

General considerations

Equipment and procedures


Shear strength

Stress history


Pressuremeter tests

General considerations

Types of instruments

Calibration procedures

Experimental results

Analysis of pressuremeter tests

Pressuremeter tests in sand

Cone pressuremeter tests in clay and sand

Pressuremeter tests in cohesive-frictional soils

Pressuremeter tests in unsaturated soil conditions

Design rules

Flat dilatometer test (DMT)

General considerations

Equipment and procedures

Intermediate DMT parameters

Interpretation of test results

Soil characterization

Geotechnical parameters in clay

Geotechnical parameters in sand

Direct applications

Design parameters: guidelines


Sand 282

Residual soils


References and further reading


About the Author

Fernando Schnaid is Associated Professor of Civil Engineering at Federal University of Rio Grande do Sul, Brazil.

Subject Categories

BISAC Subject Codes/Headings:
SCIENCE / Earth Sciences / General
SCIENCE / Geophysics