Higher Education

Principles of Geotechnical Engineering, SI Edition, 8th Edition

  • Braja M. Das California State University, Sacramento
  • Khaled Sobhan Florida Atlantic University
  • ISBN-10: 1133108679  |  ISBN-13: 9781133108672
  • 448 Pages
  • © 2014 | Published
  • College Bookstore Wholesale Price = $183.50
  • Newer Edition Available
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Intended as an introductory text in soil mechanics, the eighth edition of Das, PRINCIPLES OF GEOTECHNICAL ENGINEERING offers an overview of soil properties and mechanics together with coverage of field practices and basic engineering procedure. Background information needed to support study in later design-oriented courses or in professional practice is provided through a wealth of comprehensive discussions, detailed explanations, and more figures and worked out problems than any other text in the market.

Features and Benefits

  • Includes a comprehensive discussion on weathering of rocks and the formation of sedimentary and metamorphic rocks.
  • Presents a detailed explanation for the variation of the maximum and minimum void ratios of granular soils due to grain size, shape, and non plastic fine contents.
  • The Kozeny-Carman equation and modifications thereof to estimate hydraulic conductivity of granular soils is discussed in detail.
  • More figures and worked out problems than any other text in the market.
  • The most recent information and findings in the literature.

Table of Contents

1. Geotechnical Engineering – A Historical Perspective.
2. Origins of Soil and Grain Size.
3. Weight-Volume Relationships.
4. Plasticity and Structure of Soil.
5. Classification of Soil.
6. Soil Compaction.
7. Permeability.
8. Seepage.
9. In Situ Stresses.
10. Stresses in a Soil Mass.
11. Compressibility of Soil.
12. Shear Strength of Soil.
13. Lateral Earth Pressure: At-Rest, Rankine, and Coulomb.
14. Lateral Earth Pressure: Curved Failure Surface.
15. Slope Stability.
16. Soil-Bearing Capacity for Shallow Foundations.
17. Subsoil Exploration.
Appendix A. A Generalized Case for Rankine Active and Passive Pressure – Granular Backfill.

What's New

  • Case histories have been added in appropriate chapters in order to familiarize the student with the unpredictable variability of soil in the field.
  • Challenging critical thinking problems have been added to the end-of-chapter problem sections for increased understanding of the content.
  • A 16-page color insert of photographs including rocks and rock-forming minerals has been added to this edition in order to fully capture the unique coloring that helps geotechnical engineers distinguish one mineral/rock from the other.
  • Chapter introductions and summaries have been expanded in this edition in order to more clearly lay out the content, both before and after it's been read.
  • Questions for self-study along with answers are provided on a free companion website for students to use for practice and examination preparation.

Efficacy and Outcomes


"The presentation of the book is excellent. I particularly like the fact that many of the example problems are presented in the practical context. This definitely helps engage the students and improve their understanding. This is based on my experience using this textbook and my students' feedback."

— Tong Qiu, The Pennsylvania State University

"The presentation in the book is easy to follow. The book is written in a way that students can read and understand the presented concepts without difficulties. Illustrations in the book are very clear and have higher quality than those of other books. The problems at the end of each chapter cover all the concepts in that chapter. These problems are similar to those covered by the National Fundamental Engineering (FE) Exam. That is why students prefer to use this book for the preparation of the FE exam."

— Kamal Tawfiq, Florida State University

"The book is well written, clearly and precisely, as compared with other soil mechanics books. Students could take a big advantage using this book for independent study."

— Jay Wang, Louisiana Tech University


All supplements have been updated in coordination with the main title. Select the main title's "About" tab, then select "What's New" for updates specific to title's edition.

For more information about these supplements, or to obtain them, contact your Learning Consultant.

Instructor Supplements

Instructor's Solutions Manual, SI Version  (ISBN-10: 1133110908 | ISBN-13: 9781133110903)

Solutions to all end-of-chapter problems from the text.

Meet the Author

Author Bio

Braja M. Das

Dr. Braja Das is Dean Emeritus of the College of Engineering and Computer Science at California State University, Sacramento. He received his M.S. in Civil Engineering from the University of Iowa and his Ph.D. in Geotechnical Engineering from the University of Wisconsin. He is the author of a number of geotechnical engineering texts and reference books and more than 250 technical papers in the area of geotechnical engineering. His primary areas of research include shallow foundations, earth anchors, and geosynthetics. Dr. Das is a Fellow and Life Member of the American Society of Civil Engineers, Life Member of the American Society for Engineering Education, and an Emeritus Member of the Chemical and Mechanical Stabilization Committee of the Transportation Research Board of the National Research Council (Washington D.C.). He has received numerous awards for teaching excellence, including the AMOCO Foundation Award, the AT&T Award for Teaching Excellence from the American Society for Engineering Education, the Ralph Teetor Award from the Society of Automotive Engineers, and the Distinguished Achievement Award for Teaching Excellence from the University of Texas at El Paso.

Khaled Sobhan

Dr. Khaled Sobhan is a Professor of Civil, Environmental and Geomatics Engineering at Florida Atlantic University. He received his M.S. degree from The Johns Hopkins University, and his Ph.D. from Northwestern University, both in the area of Geotechnical Engineering. His primary research areas include ground improvement, geotechnology of soft soils, experimental soil mechanics, and geotechnical aspects of pavement engineering. Dr. Sobhan served as the Chair of the Chemical and Mechanical Stabilization committee (AFS90) of the Transportation Research Board (2005-2011), and co-authored the TRB Circular titled Evaluation of Chemical Stabilizers: State-of-the-Practice Report (EC086). He is currently serving as an Associate Editor of ASCE Journal of Materials in Civil Engineering, and on the editorial boards of the ASTM Geotechnical Testing Journal, Geotechnical and Geological Engineering (Springer, The Netherlands), and International Journal of Geotechnical Engineering. Dr. Sobhan is a recipient of the distinguished Award for Excellence and Innovation in Undergraduate Teaching (2006), and the Excellence in Graduate Mentoring Award (2009) from Florida Atlantic University. He has authored/co-authored more than 100 technical articles and reports in the area of geotechnical engineering.