CHAPTER 1 - SOIL AGGREGATE, PLASTICITY, AND CLASSIFICATION

1.1 Introduction

1.2 Soil-Separate Size Limits

1.3 Clay Minerals

1.4 Nature of Water in Clay

1.5 Repulsive Pressure

1.6 Flocculation and Dispersion of Clay Particles

1.7 Consistency of Cohesive Soils

1.8 Liquidity Index

1.9 Activity

1.10 Grain-Size Distribution of Soil

1.11 Weight-Volume Relationships

1.12 Relative Density and Relative Compaction

1.13 Effect of Roundness and Non-plastic Fines on e_max and e_min of Granular Soils

1.14 Unified Soil Classification System

References

This is an expanded chapter. The word "plasticity" has been added to the title. Sections 1.3, 1.5, 1.6, 1.7, 1.9, 1.10, 1.13, and 1.14 are new additions compared to the second edition. The Gouy-Chapman theory is given in Section 1.5. Langmuir's equation is given in Section 1.6. Van der Wall's forces are discussed in Section 1.7. The fall cone method is discussed in Section 1.8. Section 1.14 gives the effect of roundness (Youd, 1973) and non-plastic fines (Lade et al., 1998; Cubrinovski and Ishihara, 1999 and 2002) on maximum and minimum void ratios.

Number of figures - 38

Number of tables - 6

Number of example problems - 2

CHAPTER 2 - STRESSES AND STRAINS - ELASTIC EQUILIBRIUM

Introduction

Basic Definition and Sign Convention for Stresses

Equations for Static Equilibrium

Concept of Strain

Hooke's Law

Plane Strain Problems

Equations of Compatibility for Three Dimensional Problems

Stresses on an Inclined Plane and Principal Stresses for Plane Strain Problems

Strains on an Inclined Plane and Principal Strains for Plane Strain Problems

Stress Components on Inclined Plane, Principal Stresses, and Octahedral Stresses - Three Dimensional Case

Strain Components on Inclined Plane, Principal Strains, and Octahedral Stresses - Three Dimensional Case

References

There are no changes from the second edition in this chapter.

Number of figures - 22

Number of tables - None

Number of sample problems - 5

CHAPTER 3 - STRESSES AND DISPLACEMENTS IN A SOIL MASS

3.1 Introduction

Two Dimensional Problems

Vertical Line Load on the Surface

Vertical Line Load on the Surface of a Finite Layer

Vertical Line Load inside a Semi-Infinite Mass

Horizontal Line Load on the Surface

Horizontal Line Load inside a Semi-Infinite Mass

Uniform Vertical Loading on an Infinite Strip on the Surface

Uniform Strip Load inside a Semi-Infinite Mass

Uniform Horizontal Loading on an Infinite Strip on the Surface

Triangular Normal Loading on an Infinite Strip on the Surface

Vertical Stress in a Semi-Infinite Mass Due to Embankment Loading

Three Dimensional Problems

tresses Due to Vertical Point Load on the Surface

Deflection Due to a Concentrated Point Load on the Surface

Horizontal Point Load on the Surface

Stresses Below a Circularly Loaded Flexible Area (Uniform Vertical Load)

Vertical Displacement Due to a Uniformly Loaded Circular Area on the Surface

Vertical Stress below a Rectangular Loaded Area on the Surface

Average Vertical Stress Increase Due To a Uniformly Loaded Rectangular Area

Deflection Due to a Uniformly Loaded Flexible Rectangular Area

Stresses in a Layered Medium

Vertical Stress at the Interface of a Three-Layer Flexible System

References

Changes from second edition:

The word "displacement" is added in title

Vertical displacement added in Section 3.2

Vertical stress and displacement given with tables (Poulos, 1966) in Section 3.3

Expanded table for vertical stress in Section 3.7; relationship for vertical displacement at surface added

Vertical displacement relationship added in Section 3.9

Equation in rectangular coordinate system added in Section 3.10; also vertical deflection relationship at the surface added

Section 3.13 new

Deflection relationship added in Section 3.14

Section 3.16 new

Tables and equations for determination of vertical stress below the center of a rectangular area added

Section 3.18 new (Griffiths, 1984, Canadian Geotechnical Journal)

Section 3.19 new

Number of tables - 23

Number of figures - 33

Number of example problems - 7

CHAPTER 4 - PORE WATER PRESSURE DUE TO UNDRAINED LOADING

Introduction

Pore Water Pressure Developed Due to Isotropic Stress Application

Pore Water Pressure Parameter B

Pore Water Pressure Due to Uniaxial Loading

Directional Variation of A_f

_{Pore Water Pressure under Triaxial Test
Conditions}

_{Henkel's Modification of Pore Water Pressure
Equation}

_{Pore Water Pressure Due to One Dimensional Strain Loading
(Oedometer Test)}

_References

_{Changes from second edition:}

_{Section 4.3 is new. Discusses B with numerical values of
the compressibility of pore water and soil skeleton (soft, medium,
stiff, and very still soils).}

_{Section 4.5 is new. Discusses A_f with
directional variation of major principal stress for clay soils
(anisotropy).}

_{Number of figures - 14}

_{Number of tables - 4}

_{Number of example problems - 1}

_{CHAPTER 5 - PERMEABILITY AND SEEPAGE (tentative)}

_{5.1 Introduction}

_Permeability

_{Darcy's Law}

_{Determination of hydraulic conductivity in the laboratory
(constant head test, falling head test, from consolidation test,
constant rate of strain test)}

_{Permeameters for testing of clay soils}

_{Kozeny-Carman equation}

_{Estimation of hydraulic conductivity of granular soil using
the Kozeny-Carman equation with examples (Carrier III, 2003,
ASCE)}

_{Estimation of k in cohesive soils with examples}

_{Laboratory test for k in coarse sand and gravel (Kenney,
Lau, and Ofoegbu, 1984, Canadian Geotechnical Journal)}

_{Hydraulic conductivity in compacted soil (effect of
confining pressure, molding moisture content)}

_{Anisotropy with respect to hydraulic conductivity
(additional experimental results)}

_{Hydraulic conductivity in stratified soil - including
laboratory experimental results (see Sridhavan and Prakash, 2002,
ASTM Geotechnical Testing Journal)}

_{In situ hydraulic conductivity for compacted clay}

_Seepage

_{uation of continuity}

_{Use of continuity equation for solution of flow
problems}

_{Flow nets}

_{Hydraulic uplift force under a structure}

_{Flow nets in anisotropic material}

_{Construction of flow nets for hydraulic structures on
non-homogeneous subsoils}

_{Numerical analysis of seepage}

_{Seepage force per unit volume of soil mass}

_{Safety of hydraulic structures against piping}

_{Filter design}

_{Calculation of seepage through an earth dam resting on an
impervious base}

_{Plotting of phreatic line for seepage through earth
dams}

_{Entrance, discharge, and transfer conditions of line of
seepage through earth dams}

_{Flow net construction for earth dams (a number of changes
in this section)}

_References

_{Major changes or completely new material in bold.}

_{Approximate number of figures - 70}

_{Approximate number of tables - 7}

_{Approximate example problems - 10}

_{CHAPTER 6 - CONSOLIDATION}

_{6.1 Introduction}

_{Theory of one dimensional consolidation}

_{Degree of consolidation under time-dependent
loading}

_{Numerical solution for one dimensional
consolidation}

_{Standard one dimensional consolidation test and
interpretation}

_{Effect of sample disturbance on the e vs. log s'
curve}

_{Compression index correlation (some new correlations to be
added)}

_{Correlations for preconsolidation pressure (based on
laboratory tests, field vane, piezocone, dilatometer test; see
Nagaraj et al., 1985, 1986, ASTM Geotechnical Testing Journal; see
Chang, 1991, Canadian Geotechnical Journal)}

_{Secondary consolidation and general comments on
consolidation test}

_{Calculation of one dimensional consolidation
settlement}

_{Coefficient of consolidation}

_{Correlation of C_v with index properties such as
activity, liquid limit, shrinkage limit}

_{Comparison of C_v obtained from various methods
with field observations}

_{Constant rate-of-strain consolidation tests}

_{Constant-gradient consolidation test}

_{Sand drains}

_{Solution for radial drainage due to time-dependent
loading}

_{Constant rate of strain consolidation with radial
drainage}

_{Numerical solution for radial drainage (sand
drain)}

_{General comments on sand drain problems}

_{Field observations for settlement of clay with sand
drains}

_{Prefabricated vertical drains (PVD)}

_{Design of PVDs}

_Problems

_{Major changes or completely new material in bold.}

_{Approximate number of figures - 40}

_{Approximate number of tables - 10}

_{Approximate example problems - 12-15}

_{CHAPTER 7 - SHEAR STRENGTH OF SOILS (tentative)}

_Introduction

_{Mohr-Coulomb failure criteria}

_{Shearing strength of granular soils}

_{Critical void ratio and its relationship to
liquefaction}

_{Curvature of the failure envelope}

_{General comments on the friction angle of granular
soils}

_{Correlation for friction angle of granular soils based on
field tests (SPT, CPT, PMT, DMT)}

_{Shear strength of granular soils under plane strain
condition}

_{Shear strength of cohesive soils}

_{Unconfined compression test}

_{Modulus of elasticity and Poisson's ratio from triaxial
tests}

_{Relation between A_f and swell and collapse of
compacted clayey soils}

_{Friction angles f and f_ult}

_{_{Effect of rate of strain on the undrained shear
strength}}

_{_{Stress path}}

_{_{Hvorslev's parameters}}

_{_{Relations between moisture content, effective stress,
and strength for clay soils}}

_{_{Correlations for effective stress friction
angle}}

_{_{Anisotropy in undrained shear strength}}

_{_{Sensitivity and thixotropic characteristics of
clay}}

_{_{Creep (rate process theory)}}

_{_{Vane shear test}}

_{_{Relation of undrained shear strength (S_u)
and effective overburden pressure (p')}}

_{_{Correlations of undrained shear strength with results
from VST, SPT, CPT, CPTV, PMT, and DMT}}

_{_{Other theoretical considerations - yield surfaces in
three dimensions}}

_{_{Experimental results to compare the yield
functions}}

_{_References}

_{_{Major changes or new material in bold.}}

_{_{Approximate number of figures - 80}}

_{_{Approximate number of tables - 10}}

_{_{Approximate example problems - 10}}

_{_{CHAPTER 8 - SETTLEMENT OF FOUNDATIONS}}

_{_Introduction}

_{_{Elastic settlement}}

_{_{Modulus of Elasticity and Poisson's
Ratio}}

_{_{Contact Stress and Settlement Profile of
Foundations}}

_{_{Settlement Based on the Theory of
Elasticity}}

_{_{Generalized Average Elastic Settlement
Equation}}

_{_{Improved Equation for Elastic
Settlement}}

_{_{Calculation of Elastic Settlement in Granular Soil
Using Simplified Strain Influence Factor}}

_{_{Elastic Settlement of Sandy Soils - Burland and
Burbidge's Method}}

_{_{Consolidation Settlement}}

_{_{One Dimensional Primary Consolidation
Settlement}}

_{_{Skempton-Bjerrum Modification for Consolidation
Settlement Calculation}}

_{_{Settlement of Overconsolidated Clays}}

_{_{Settlement Calculation Using Stress
Path}}

_{_{Comparison of Primary Consolidation Settlement
Calculation Procedures}}

_{_{Secondary Consolidation Settlement}}

_{_{Precompression for Improving Foundation
Settlement}}

_{_References}

_{_{Changes from the second edition:}}

_{_{Section 8.3 is new to this chapter}}

_{_{Section 8.4 is new to this chapter (Steinbrenner,
1934; Fox, 1948)}}

_{_{Section 8.6 is new (Mayne and Poulos,
1999)}}

_{_{Section 8.8 is new to this chapter}}

_{_{New graphs and table in Section 8.14}}

_{_{Number of figures - 33}}

_{_{Number of tables - 9}}

_{_{Number of example problems - 9}}

_{_{APPENDIX A - CALCULATION OF STRESS AT THE INTERFACE OF
A THREE-LAYERED FLEXIBLE SYSTEM}}

_{_{Comments: This is the table given on pages 96-123 of
the second edition.}}

About the Author

Braja M. Das was formerly Dean of the College of Engineering and Computer Science, California State University, Sacramento.

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About the Author