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Advanced Soil Mechanics

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Descripción

The fourth edition further examines the relationships between the maximum and minimum void ratios of granular soils and adds the American Association of State Highway and Transportation Officials (AASHTO) soil classification system. It summarizes soil compaction procedures and Proctor compaction tests. It introduces new sections on vertical stress due to a line 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.


Características

  • ISBN: 978-0-415-50665-6
  • Páginas: 634
  • Tamaño: 17x24
  • Edición:
  • Idioma: Inglés
  • Año: 2013

Compra bajo pedidoDisponibilidad: 15 a 30 Días

Contenido Advanced Soil Mechanics

The fourth edition further examines the relationships between the maximum and minimum void ratios of granular soils and adds the American Association of State Highway and Transportation Officials (AASHTO) soil classification system. It summarizes soil compaction procedures and Proctor compaction tests. It introduces new sections on vertical stress due to a line 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 text discusses the fundamental concepts of compaction of clay soil for the construction of clay liners in waste disposal sites as they relate to permeability and adds new empirical correlations for overconsolidation ratio and compression index for clay soils. It provides additional information on the components affecting friction angle of granular soils, drained failure envelopes, and secant residual friction angles of clay and clay shale.

    Contains 11 chapters
    Provides new example problems
    Includes SI units throughout the text
    Uses a methodical approach

The author adds new correlations between field vane shear strength, preconsolidation pressure, and overconsolidation ratio of clay soils. He also revises and expands information on elastic settlement of shallow foundations, adds a precompression with sand grains, and presents the parameters required for the calculation of stress at the interface of a three-layered flexible system.

An ideal resource for beginning graduate students, the fourth edition of Advanced Soil Mechanics further develops the basic concepts taught in undergraduate study by presenting a solid foundation of the fundamentals of soil mechanics.

This book is suitable for students taking an introductory graduate course, and it can also be used as a reference for practicing professionals.

Soil aggregate, plasticity, and classification

Professor Braja Das served as dean of the college of engineering and computer science at California State University Sacramento, and is the author of several geotechnical engineering texts and reference books.

INDEX

Soil aggregate, plasticity, and classification

Introduction

Soil: Separate size limits

Clay minerals

Nature of water in clay

Repulsive potential

Repulsive pressure

Flocculation and dispersion of clay particles

Consistency of cohesive soils

Liquidity index

Activity

Grain-size distribution of soil

Weight–volume relationships

Relative density and relative compaction

Relationship between emax and emin

Soil classification systems

Compaction

Empirical relationships for proctor compaction tests

References

Stresses and strains: Elastic equilibrium

Introduction

Basic definition and sign conventions for stresses

Equations of 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 strain for plane strain problems

Stress components on an inclined plane, principal stress, and octahedral stresses: Three-dimensional case

Strain components on an inclined plane, principal strain, and octahedral strain: Three-dimensional case

Stresses and displacements in a soil mass: Two-dimensional problems

Introduction

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

References

Stresses and displacements in a soil mass: Three-dimensional problems

Introduction

Stresses due to a vertical point load on the surface

Deflection due to a concentrated point load at the surface

Horizontal point load on the surface

Vertical stress due to a line load of finite length

Stresses below a circularly loaded flexible area (uniform vertical load)

Vertical displacement due to uniformly loaded circular area at the surface

Vertical stress below a rectangular loaded area on the surface

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

Vertical stress in Westergaard material due to a vertical point load

Solutions for vertical stress in Westergaard material

Distribution of contact stress over footings

Reliability of stress calculation using the theory of elasticity

References

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 Af

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

Permeability

Introduction

Darcy’s law

Validity of Darcy’s law

Determination of coefficient of permeability in the laboratory

Variation of coefficient of permeability for granular soils

Variation of coefficient of permeability for cohesive soils

Directional variation of permeability in anisotropic medium

Effective coefficient of permeability for stratified soils

Determination of coefficient of permeability in the field

Factors affecting the coefficient of permeability

Electroosmosis

Seepage

Introduction

Equation of continuity

Use of continuity equation for solution of simple flow problem

Flow nets

Hydraulic uplift force under a structure

Flow nets in anisotropic material

Construction of flow nets for hydraulic structures on nonhomogeneous 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

References

Consolidation

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 versus log σ′ curve

Secondary consolidation

General comments on consolidation tests

Calculation of one-dimensional consolidation settlement

Coefficient of consolidation

One-dimensional consolidation with viscoelastic models

Constant rate-of-strain consolidation tests

Constant-gradient consolidation test

Sand drains

Numerical solution for radial drainage (sand drain)

General comments on sand drain problems

References

Shear strength of soils

Introduction

Mohr–Coulomb failure criterion

Shearing strength of granular soils

Critical void ratio

Curvature of the failure envelope

General comments on the friction angle of granular soils

Shear strength of granular soils under plane strain conditions

Shear strength of cohesive soils

Unconfined compression test

Modulus of elasticity and Poisson’s ratio from triaxial tests

Friction angles φ and φult

Effect of rate of strain on the undrained shear strength

Effect of temperature 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 clays

Vane shear test

Relation of undrained shear strength (Su) and effective overburden pressure (p′)

Creep in soils

Other theoretical considerations: Yield surfaces in three dimensions

Experimental results to compare the yield functions

References

Elastic settlement of shallow foundations

Introduction

Elastic settlement of foundations on saturated clay (Poisson’s ratio ν =0.5 )

Elastic settlement of foundations on granular soil

Settlement calculation of foundations on granular soil using methods based on observed settlement of structures and full-scale prototypes

Semi-empirical methods for settlement calculation of foundations on granular soil

Settlement derived from theory of elasticity

References

Consolidation settlement of shallow foundations

Introduction

One-dimensional primary consolidation settlement calculation

Skempton–Bjerrum modification for calculation of consolidation settlement

Settlement calculation using stress path

Comparison of primary consolidation settlement calculation procedures

Secondary consolidation settlement

Precompression for improving foundation soils

Precompression with sand drains

References

Appendix

Index

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