PREFACE.
1. Introduction.
Geotechnical Engineering. Foundation Engineering. General Format of
the Text. Design Methods. Numerical Methods in Geotechnical
Engineering. References.
PART I: GEOTECHINCAL PROPERTIES AND EXPLORATION OF SOIL.
2. Geotechnical Properties of Soil.
Introduction. Grain-Size Distribution. Size Limits for Soils.
Weight-Volume Relationships. Relative Density. Atterberg Limits.
Liquidity Index. Activity. Soil Classification Systems. Hydraulic
Conductivity of Soil. Steady-State Seepage. Effective Stress.
Consolidation. Calculation of Primary Consolidation Settlement.
Time Rate of Consolidation. Degree of Consolidation under Ramp
Loading. Shear Strength. Unconfined Compression Test. Comments on
Friction Angle. Correlations of Undrained Shear Strength.
Sensitivity. Problems. References.
3. Natural Soil Deposits and Subsoil Exploration.
Introduction. Natural Soil Deposits. Soil Origin. Residual Soil.
Gravity Transported Soil. Alluvial Deposits. Lacustrine Deposits.
Glacial Deposits. Aeolian Soil Deposits. Organic Soil. Some Local
Terms for Soil. Subsurface Exploration. Purpose of Subsurface
Exploration. Subsurface Exploration Program. Exploratory Borings in
the Field. Procedures for Sampling Soil. Split-Spoon Sampling.
Sampling with a Scraper Bucket. Sampling with a Thin-Walled Tube.
Sampling with a Piston Sampler. Observation of Water Tables. Vane
Shear Test. Cone Penetration Test. Pressuremeter Test (PMT).
Dilatometer Test. Iowa Borehole Shear Test. K? Stepped-Blade Test.
Coring of Rocks. Preparation of Boring Logs. Geophysical
Exploration. Subsoil Exploration Report. Problems. References.
PART II: FOUNDATION ANALYSIS.
4. Shallow Foundations: Ultimate Bearing Capacity.
Introduction. General Concept. Terzaghi's Bearing Capacity Theory.
Factor of Safety. Modification of Bearing Capacity Equations for
Water Table. The General Bearing Capacity Equation. Other Solutions
for Bearing Capacity Factor (Ny), Shape and Depth Factors. Case
Studies on Ultimate Bearing Capacity. Effect of Soil
Compressibility. Eccentrically Loaded Foundations. Ultimate Bearing
Capacity under Eccentric Loading--One-Way Eccentricity. Bearing
Capacity--Two-Way Eccentricity. Bearing Capacity of a Continuous
Foundation Subjected to Eccentrically Inclined Loading. Problems.
References.
5. Ultimate Bearing Capacity of Shallow Foundations: Special
Cases.
Introduction. Foundation Supported by a Soil with a Rigid Base at a
Shallow Depth. Foundations on Layered Clay. Bearing Capacity of
Layered Soils: Stronger Soil Underlain by Weaker Soil. Bearing
Capacity of Layered Soils: Weaker Soils Underlain by Stronger
Soils. Continuous Foundation on Weak Clay with a Granular Trench.
Closely Spaced Foundations--Effect on Ultimate Bearing Capacity.
Bearing Capacity of Foundations on Top of a Slope. Bearing Capacity
of Foundations on a Slope. Seismic Bearing Capacity and Settlement
in Granular Soil. Foundations on Rock. Uplift Capacity of
Foundations. Problems. References.
6. Vertical Stress Increase in Soil.
Introduction. Stress Due to a Concentrated Load. Stress Due to a
Circularly Loaded Area. Stress Due to a Line Load. Stress Below a
Vertical Strip Load (Finite Width and Infinite Length). Stress
below a Rectangular Area. Stress Isobars. Average Vertical Stress
Increase Due to a Rectangularly Loaded Area. Average Vertical
Stress Increase below the Center of a Circularly Loaded Area.
Stress Increase under an Embankment. Westergaard's Solution for
Vertical Stress Due to a Point Load. Problems. References.
7. Settlement of Shallow Foundation.
Introduction. Elastic Settlement of Foundation on Saturated Clay.
Elastic Settlement. Settlement Based on the Theory of Elasticity.
Improved Equation for Elastic Settlement, Settlement of Sandy Soil:
Use of Strain Influence Factor. Settlement of Foundation on Sand
Based on Standard Penetration Resistance. Settlement in Granular
Soil Based on Pressuremeter (PMT). Effect of the Rise of Ground
Water Table on Elastic Settlement. Consolidation Settlement.
Primary Consolidation Settlement Relationships. Three-Dimensional
Effect on Primary Consolidation Settlement. Settlement Due to
Secondary Consolidation. Field Load Test. Presumptive Bearing
Capacity. Tolerable Settlement of Buildings. Problems.
References.
8. Mat Foundations.
Introduction. Combined Footings. Common Types of Mat Foundations.
Bearing Capacity of Mat Foundations. Differential Settlement of
Mats. Field Settlement Observations for Mat Foundations.
Compensated Foundation. Structural Design of Mat Foundations.
Problems. References.
9. Pile Foundations.
Introduction. Types of Piles and Their Structural Characteristics.
Continuous Flight of Auger Pile. Estimating Pile Length.
Installation of Piles. Load Transfer Mechanism. Equations for
Estimating Pile Capacity. Meyerhof's Method for Estimating Qp.
Vesic's Method For Estimating Qp. Coyle and Castello's Method for
Estimating Qp in Sand. Correlations for Calculating Qp with SPT and
CPT Results in Granular Soil. Frictionless Resistance (Qs) in Sand.
Frictional (Skin) Resistance in Clay. Ultimate Capacity of
Continuous Flight Auger Pile. Point Bearing Capacity of Piles
Resting on Rock. Pile Load Tests. Elastic Settlement of Piles.
Laterally Loaded Piles. Pile-Driving Formulas. Pile Capacity for
Vibration-Driven Piles. Wave Equation Analysis. Negative Skin
Friction. Group Piles. Group Efficiency. Ultimate Capacity of Group
Piles in Saturated Clay. Elastic Settlement of Group Piles.
Consolidation Settlement of Group Piles. Piles in Rock. Problems.
References.
10. Drilled-Shaft Foundations.
Introduction. Types of Drilled Shafts. Construction Procedures.
Other Design Considerations. Load Transfer Mechanism. Estimation of
Load-Bearing Capacity. Drilled Shafts in Granular Soil:
Load-Bearing Capacity. Load-Bearing Capacity Based on Settlement.
Drilled Shafts in Clay: Load-Bearing Capacity. Load-Bearing
Capacity Based on Settlement. Settlement of Drilled Shafts at
Working Load. Lateral Load-Carrying Capacity Characteristic Load
and Moment Method. Drilled Shafts Extending into Rock. Problems.
References.
11. Foundations on Difficult Soil.
Introduction. Collapsible Soils. Definition and Types of
Collapsible Soils. Physical Parameters for Identification.
Procedure for Calculating Collapse Settlement, Foundation Design in
Soils Not Susceptible to Wetting. Foundation Design in Soils
Susceptible to Wetting. Expansive Soils. General Nature of
Expansive Soils. Unrestrained Swell Test. Swelling Pressure Test.
Classification of Expansive Soil on the Basis of Index Tests.
Foundation Considerations for Expansive Soils. Construction on
Expansive Soils. Sanitary Landfills. General Nature of Sanitary
Landfills. Settlement of Sanitary Landfills. Problems.
References.
PART III: LATERAL EARTH PRESSURE AND EARTH-RETAINING
STRUCTURES.
12. Lateral Earth Pressure.
Introduction. Lateral Earth Pressure at Rest. Active Pressure.
Rankine Active Earth Pressure. A Generalized Case for Rankine
Active Pressure Granular Backfill. Rankine Active Pressure with
Vertical Wall Back Face and Inclined C-0 Backfill. Coulomb's Active
Earth Pressure. Lateral Earth Pressure due to Surcharge. Active
Earth Pressure for Earthquake Conditions (Granular Backfill).
Active Earth Pressure for Earthquake Conditions (Vertical Back Face
of Wall and C-) Backfill). Passive Pressure. Rankine Passive Earth
Pressure. Rankine Passive Earth Pressure (Vertical Back Face and
Inclined Backfill). Coulomb's Passive Earth Pressure. Comments on
the Failure Surface Assumption for Cuolomb's Pressure Calculations.
Caquot and Kerisel's Solution for Passive Earth Pressure (Granular
Backfill). Passive Pressure under Earthquake Conditions. Problems.
References.
13. Retaining Walls.
Introduction. Gravity and Cantilever Walls. Proportioning Retaining
Walls. Application of Lateral Earth Pressure Theories to Design.
Stability of Retaining Walls. Check for Overturning. Check for
Sliding along the Base. Check for Bearing Capacity Failure.
Construction Joints and Drainage from Backfill. Comments on Design
of Retaining Walls and a Case Study. Mechanically Stabilized
Retaining Walls. Soil Reinforcement. Considerations in Soil
Reinforcement. General Design Considerations. Retaining Walls with
Metallic Strip Reinforcement. Step-by-Step-Design Procedure Using
Metallic Strip Reinforcement. Retaining Walls with Geotextile
Reinforcement. Retaining Walls with Georigid Reinforcement-General.
Design Procedure for Georigid-Reinforced Retaining Wall. Problems.
References.
14. Sheet Pile Walls.
Introduction. Construction Methods. Cantilever Sheet Pile Walls.
Cantilever Sheet Piling Penetrating Sandy Soils. Special Cases for
Cantilever Walls Penetrating a Sandy Soil. Cantilever Sheet Piling
Penetrating Clay. Special Cases for Cantilever Walls Penetrating
Clay. Anchored Sheet-Pile Walls. Free Earth Support Method for
Penetration of Sandy Soil. Design Charts for Free Earth Support
Method (Penetration into Sandy Soil). Moment Reduction for Anchored
Sheet-Pile Walls. Computational Pressure Diagram Method for
Penetration into Sandy Soil. Field Observations for Anchor Sheet
Pile Walls. Free Earth Support Method for Penetration of Clay 482.
Anchors. Holding Capacity of Anchor Plates in Sand. Holding
Capacity of Anchor Plates in Clay (c-F Condition). Ultimate
Resistance of Tiebacks. Problems. References.
15. Braced Cuts.
Introduction. Braced Cut Analysis Based on General Wedge Theory.
Pressure Envelope for Braced Cut Design. Pressure Envelope for Cuts
in Layered Soil. Design of Various Components of a Braced Cut. Case
Studies of Braced Cuts. Bottom Heave of a Cut in Clay. Stability of
the Bottom of a Cut in Sand. Lateral Yielding of Sheet Piles and
Ground Settlement. Problems. References.
PART IV: SOIL IMPROVEMENT AND GROUND MODIFICATION.
16. Soil Improvement and Ground Modification.
Introduction. General Principles of Compaction. Empirical
Relationships for Compaction. Field Compaction. Compaction Control
for Clay Hydraulic Barriers. Vibroflotation. Blasting,
Precompression. Sand Drains. Prefabricated Vertical Drains. Lime
Stabilization. Cement Stabilization. Fly-Ash Stabilization. Stone
Columns. Sand Compaction Piles. Dynamic Compaction. Jet Grouting.
Deep Mixing. Problems. References.
Appendix A: Reinforced Concrete Design of Shallow Foundations.
Fundamentals of Reinforced Concrete Design. Reinforcing Bars.
Development Length. Design Example of a Continuous Wall Foundation.
Design Example of a Square Foundation for a Column. Design Example
of a Rectangular Foundation for a Column. References.
Answers to Problems.
Index.
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 several geotechnical engineering texts and reference books as well as more than 300 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 Stabilization of Geomaterials and Recycled Materials of the Transportation Research Board of the National Research Council. 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.
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