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This textbook is intended for use in an introductory graduate level course
that broadens (expands) the fundamental concepts acquired by students in
their undergraduate work. The introductory graduate course can be followed by advanced courses dedicated to topics such as mechanical and chemical stabilization of soils, geoenvironmental engineering, finite element application to geotechnical engineering, critical state soil mechanics, geosynthetics, rock mechanics, and others.




The first edition of this book was published jointly by Hemisphere
Publishing Corporation and McGraw-Hill Book Company of New York
with a 1983 copyright. Taylor & Francis Group published the second and
third editions with 1997 and 2008 copyrights, respectively. Compared to
the third edition, the text is now divided into 11 chapters.




Stresses and
displacements in a soil mass are now presented in two chapters with twodimensional problems in Chapter 3 and three-dimensional problems in Chapter 4. Permeability and seepage are now presented in two separate chapters (Chapters 6 and 7). Similarly, the settlement of shallow foundations is now presented in two chapters—elastic settlement in Chapter 10 and consolidation settlement in Chapter11.






Several new example problems
have been added. SI units have been used throughout the text.
Some major changes in this edition include the following:

• In Chapter 1, “Soil aggregate, plasticity, and classification,” a
more detailed description of the relationships between the maximum and minimum void ratios of granular soils is provided. The American Association of State Highway and Transportation Officials
(AASHTO) soil classification system has been added to this chapter.
Sections on soil compaction procedures in the laboratory, along with
recently developed empirical relationships for maximum dry unit
weight and optimum moisture content obtained from Proctor compaction tests, have been summarized.





• Chapter 4, “Stresses and displacements in a soil mass: Threedimensional problems,” has new sections on vertical stress due to aline load of finite length; vertical stress in Westergaard material due
to point load; line load of finite length; circularly loaded area; and
rectangularly loaded area.
• The fundamental concepts of compaction of clay soil for the construction of clay liners in waste disposal sites as they relate to permeability
are discussed in Chapter 6, “Permeability.”





• Several new empirical correlations for overconsolidation ratio and
compression index for clay soils have been added to Chapter 8,
• Chapter 9, “Shear strength of soils,” provides additional discussion
on the components affecting friction angle of granular soils, drained
failure envelopes, and secant residual friction angles of clay and clay
shale. Also added to this chapter are some new correlations between
field vane shear strength, preconsolidation pressure, and overconsolidation ratio of clay soils.





• Chapter 10, “Elastic settlement of shallow foundations,” has been
thoroughly revised and expanded.
• Discussion related to precompression with sand drains has been added
to Chapter 11, “Consolidation settlement of shallow foundations.”
• The parameters required for the calculation of stress at the interface
of a three-layered flexible system have been presented in graphical
form in the Appendix, which should make interpolation easier.