Principles of geotechnical engineering

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Hauptverfasser: Das, Braja M. 1941- (VerfasserIn), Sobhan, Khaled (VerfasserIn)
Format: Buch
Sprache:English
Veröffentlicht: Stamford, CT [u.a.] Cengage Learning 2014
Ausgabe:8. ed., SI ed.
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Datensatz im Suchindex

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adam_text Titel: Principles of geotechnical engineering Autor: Das, Braja M Jahr: 2014 Contents Preface vii About the Authors xi 1 Geotechnical Engineering—A Historical Perspective 1 1.1 Introduction 1 1.2 Geotechnical Engineering Prior to the 18th Century 1 1.3 Preclassical Period of Soil Mechanics (1700-1776) 5 1.4 Classical Soil Mechanics—Phase I (1776-1856) 6 1.5 Classical Soil Mechanics—Phase II (1856-1910) 6 1.6 Modern Soil Mechanics (1910-1927) 7 1.7 Geotechnical Engineering after 1927 8 1.8 End of an Era 12 References 13 2 Origin of Soil and Grain Size 15 2.1 Introduction 15 2.2 Rock Cycle and the Origin of Soil 15 2.3 Rock-Forming Minerals, Rock and Rock Structures 26 2.4 Soil-Particle Size 37 2.5 Clay Minerals 39 xiii xiv Contents 2.6 Specific Gravity (GJ 47 2.7 Mechanical Analysis of Soil 48 2.8 Particle-Size Distribution Curve 55 2.9 Particle Shape 61 2.10 Summary 62 Problems 63 References 66 3 Weight-Volume Relationships 67 3.1 Introduction 67 3.2 Weight-Volume Relationships 67 3.3 Relationships among Unit Weight, Void Ratio, Moisture Content, and Specific Gravity 70 3.4 Relationships among Unit Weight, Porosity, and Moisture Content 74 3.5 Various Unit Weight Relationships 75 3.6 Relative Density 81 3.7 Comments on em;iX and emin 84 3.8 Correlations between emax, emin, emax - eml„, and Median Grain Size (D50) 87 3.9 Summary 90 Problems 90 References 92 4 Plasticity and Structure of Soil 94 4.1 Introduction 94 4.2 Liquid Limit (LL) 94 4.3 Plastic Limit (PL) 101 4.4 Shrinkage Limit (SL) 103 4.5 Liquidity Index and Consistency Index 109 4.6 Activity 110 4.7 Plasticity Chart 112 4.8 Soil Structure 114 4.9 Summary 119 Problems 120 References 121 Contents XV 5 Classification of Soil 123 5.1 Introduction 123 5.2 Textural Classification 124 5.3 Classification by Engineering Behavior 126 5.4 AASHTO Classification System 126 5.5 Unified Soil Classification System 130 5.6 Comparison between the AASHTO and Unified Systems 132 5.7 Summary 142 Problems 142 References 145 6 Soil Compaction 146 6.1 Introduction 146 6.2 Compaction—General Principles 146 6.3 Standard Proctor Test 147 6.4 Factors Affecting Compaction 150 6.5 Modified Proctor Test 154 6.6 Empirical Relationships 154 6.7 Structure of Compacted Clay Soil 161 6.8 Effect of Compaction on Cohesive Soil Properties 163 6.9 Field Compaction 166 6.10 Specifications for Field Compaction 171 6.11 Determination of Field Unit Weight of Compaction 172 6.12 Compaction of Organic Soil and Waste Materials 179 6.13 Evaluation of Soils as Compaction Material 182 6.14 Special Compaction Techniques 182 6.15 Summary and General Comments 192 Problems 192 References 195 7 Permeability 198 7.1 Introduction 198 7.2 Bernoulli s Equation 198 7.3 Darcy s Law 200 7.4 Hydraulic Conductivity 202 7.5 Laboratory Determination of Hydraulic Conductivity 204 xvi Contents 7.6 Relationships for Hydraulic Conductivity—Granular Soil 211 7.7 Relationships for Hydraulic Conductivity—Cohesive Soils 218 7.8 Directional Variation of Permeability 223 7.9 Equivalent Hydraulic Conductivity in Stratified Soil 225 7.10 Permeability Test in the Field by Pumping from Wells 230 7.11 In Situ Hydraulic Conductivity of Compacted Clay Soils 232 7.12 Summary and General Comments 236 Problems 237 References 241 8 Seepage 243 8.1 Introduction 243 8.2 Laplace s Equation of Continuity 243 8.3 Continuity Equation for Solution of Simple Flow Problems 245 8.4 Flow Nets 249 8.5 Seepage Calculation from a Flow Net 250 8.6 Flow Nets in Anisotropic Soil 254 8.7 Mathematical Solution for Seepage 256 8.8 Uplift Pressure under Hydraulic Structures 258 8.9 Seepage through an Earth Dam on an Impervious Base 259 8.10 L. Casagrande s Solution for Seepage through an Earth Dam 262 8.11 Filter Design 264 8.12 Summary 267 Problems 267 References 270 9 In Situ Stresses 271 9.1 Introduction 271 9.2 Stresses in Saturated Soil without Seepage 271 9.3 Stresses in Saturated Soil with Upward Seepage 276 9.4 Stresses in Saturated Soil with Downward Seepage 280 9.5 Seepage Force 280 9.6 Heaving in Soil Due to Flow around Sheet Piles 285 9.7 Use of Filters to Increase the Factor of Safety against Heave 290 9.8 Effective Stress in Partially Saturated Soil 293 9.9 Capillary Rise in Soils 294 9.10 Effective Stress in the Zone of Capillary Rise 296 Contents xvii 9.11 Summary and General Comments 299 Problems 300 References 304 10 Stresses in a Soil Mass 305 10.1 Introduction 305 10.2 Normal and Shear Stresses on a Plane 306 10.3 The Pole Method of Finding Stresses along a Plane 310 10.4 Stresses Caused by a Point Load 312 10.5 Vertical Stress Caused by a Vertical Line Load 314 10.6 Vertical Stress Caused by a Horizontal Line Load 317 10.7 Vertical Stress Caused by a Vertical Strip Load (Finite Width and Infinite Length) 318 10.8 Linearly Increasing Vertical Loading on an Infinite Strip 323 10.9 Vertical Stress Due to Embankment Loading 326 10.10 Vertical Stress below the Center of a Uniformly Loaded Circular Area 330 10.11 Vertical Stress at Any Point below a Uniformly Loaded Circular Area 331 10.12 Vertical Stress Caused by a Rectangularly Loaded Area 335 10.13 Influence Chart for Vertical Pressure 342 10.14 Summary and General Comments 345 Problems 346 References 352 11 Compressibility of Soil 353 11.1 Introduction 353 11.2 Contact Pressure and Settlement Profile 354 11.3 Relations for Elastic Settlement Calculation 356 11.4 Fundamentals of Consolidation 364 11.5 One-Dimensional Laboratory Consolidation Test 368 11.6 Void Ratio-Pressure Plots 370 11.7 Normally Consolidated and Overconsolidated Clays 374 11.8 General Comments on Conventional Consolidation Test 376 11.9 Effect of Disturbance on Void Ratio-Pressure Relationship 378 11.10 Calculation of Settlement from One-Dimensional Primary Consolidation 379 xviii Contents 11.11 Correlations for Compression Index (Ct.) 381 11.12 Correlations for Swell Index (CJ 383 11.13 Secondary Consolidation Settlement 389 11.14 Time Rate of Consolidation 391 11.15 Determination of Coefficient of Consolidation 400 11.16 Calculation of Consolidation Settlement under a Foundation 408 11.17 A Case History—Settlement Due to a Preload Fill for Construction of Tampa VA Hospital 410 11.18 Methods for Accelerating Consolidation Settlement 414 11.19 Precompression 416 11.20 Summary and General Comments 420 Problems 421 References 427 12 Shear Strength of Soil 429 12.1 Introduction 429 12.2 Mohr-Coulomb Failure Criterion 429 12.3 Inclination of the Plane of Failure Caused by Shear 431 12.4 Laboratory Test for Determination of Shear Strength Parameters 433 12.5 Direct Shear Test 433 12.6 Drained Direct Shear Test on Saturated Sand and Clay 438 12.7 General Comments on Direct Shear Test 440 12.8 Triaxial Shear Test-General 445 12.9 Consolidated-Drained Triaxial Test 446 12.10 Consolidated-Undrained Triaxial Test 455 12.11 Unconsolidated-Undrained Triaxial Test 461 12.12 Unconfined Compression Test on Saturated Clay 463 12.13 Empirical Relationships between Undrained Cohesion (ej and Effective Overburden Pressure Or ,) 464 12.14 Sensitivity and Thixotropy of Clay 466 12.15 Strength Anisotropy in Clay 469 12.16 Vane Shear Test 470 12.17 Other Methods for Determining Undrained Shear Strength 476 12.18 Shear Strength of Unsaturated Cohesive Soils 476 12.19 Stress Path 479 12.20 Summary and General Comments 484 Problems 485 References 489 Contents xix 13 Lateral Earth Pressure: At-Rest, Rankine, and Coulomb 491 13.1 Introduction 491 13.2 At-Rest, Active, and Passive Pressures 491 13.3 Earth Pressure At-Rest 494 13.4 Earth Pressure At-Rest for Partially Submerged Soil 496 13.5 Rankine s Theory of Active Pressure 499 13.6 Theory of Rankine s Passive Pressure 501 13.7 Yielding of Wall of Limited Height 503 13.8 Rankine Active and Passive Pressure with Sloping Backfill 504 13.9 Diagrams for Lateral Earth-Pressure Distribution against Retaining Walls 506 13.10 Coulomb s Active Pressure 518 13.11 Graphic Solution for Coulomb s Active Earth Pressure 521 13.12 Coulomb s Passive Pressure 527 13.13 Active Force on Retaining Walls with Earthquake Forces 527 13.14 Common Types of Retaining Walls in the Field 536 13.15 Summary and General Comments 543 Problems 545 References 549 14 Lateral Earth Pressure: Curved Failure Surface 550 14.1 Introduction 550 14.2 Retaining Walls with Friction 550 14.3 Properties of a Logarithmic Spiral 552 14.4 Procedure for Determination of Passive Earth Pressure (Pp)—Cohesionless Backfill 554 14.5 Coefficient of Passive Earth Pressure {Kp) 556 14.6 Caquot and Kerisel Solution for Passive Earth Pressure (Granular Backfill) 560 14.7 Passive Force on Walls with Earthquake Forces 563 14.8 Braced Cuts—General 565 14.9 Determination of Active Thrust on Bracing Systems of Open Cuts—Granular Soil 567 14.10 Determination of Active Thrust on Bracing Systems for Cuts—Cohesive Soil 569 14.11 Pressure Variation for Design of Sheetings, Struts, and Wales 569 xx Contents 14.12 Summary 574 Problems 574 References 576 15 Slope Stability 577 15.1 Introduction 577 15.2 Factor of Safety 579 15.3 Stability of Infinite Slopes 580 15.4 Infinite Slope with Steady-state Seepage 583 15.5 Finite Slopes—General 586 15.6 Analysis of Finite Slopes with Plane Failure Surfaces (Culmann s Method) 587 15.7 Analysis of Finite Slopes with Circular Failure Surfaces—General 590 15.8 Mass Procedure—Slopes in Homogeneous Clay Soil with / = 0 591 15.9 Recent Developments on Critical Circle of Clay Slopes ( £ = 0) 598 15.10 Mass Procedure—Slopes in Homogeneous c — j Soil 599 15.11 Ordinary Method of Slices 606 15.12 Bishop s Simplified Method of Slices 614 15.13 Stability Analysis by Method of Slices for Steady-state Seepage 616 15.14 Solutions for Steady-state Seepage 617 15.15 A Case History of Slope Failure 628 15.16 Morgenstern s Method of Slices for Rapid Drawdown Condition 632 15.17 Fluctuation of Factor of Safety of Slopes in Clay Embankment on Saturated Clay 634 15.18 Summary 638 Problems 638 References 642 16 Soil Bearing Capacity for Shallow Foundations 644 16.1 Introduction 644 16.2 Ultimate Soil-Bearing Capacity for Shallow Foundations 645 16.3 Terzaghi s Ultimate Bearing Capacity Equation 647 Contents xxi 16.4 Effect of Groundwater Table 651 16.5 Factor of Safety 652 16.6 General Bearing Capacity Equation 655 16.7 A Case History for Evaluation of the Ultimate Bearing Capacity 659 16.8 Ultimate Load for Shallow Foundations Under Eccentric Load 663 16.9 Bearing Capacity of Sand Based on Settlement 668 16.10 Plate-Load Test 670 16.11 Summary and General Comments 673 Problems 673 References 676 17 Subsoil Exploration 678 17.1 Introduction 678 17.2 Planning for Soil Exploration 679 17.3 Boring Methods 680 17.4 Common Sampling Methods 684 17.5 Sample Disturbance 689 17.6 Correlations for Standard Penetration Test 689 17.7 Other In Situ Tests 694 17.8 Rock Coring 699 17.9 Soil Exploration Report 701 17.10 Summary 701 Problems 703 References 704 Appendix A A Generalized Case for Rankine Active and Passive Pressure-Granular Backfill 706 Answers to Selected Problems 714 Index 722
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author Das, Braja M. 1941-
Sobhan, Khaled
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edition 8. ed., SI ed.
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spellingShingle Das, Braja M. 1941-
Sobhan, Khaled
Principles of geotechnical engineering
Geotechnik (DE-588)4156771-7 gnd
Ingenieurgeologie (DE-588)4125674-8 gnd
Bodenmechanik (DE-588)4007385-3 gnd
subject_GND (DE-588)4156771-7
(DE-588)4125674-8
(DE-588)4007385-3
title Principles of geotechnical engineering
title_auth Principles of geotechnical engineering
title_exact_search Principles of geotechnical engineering
title_full Principles of geotechnical engineering Braja M. Das ; Khaled Sobhan
title_fullStr Principles of geotechnical engineering Braja M. Das ; Khaled Sobhan
title_full_unstemmed Principles of geotechnical engineering Braja M. Das ; Khaled Sobhan
title_short Principles of geotechnical engineering
title_sort principles of geotechnical engineering
topic Geotechnik (DE-588)4156771-7 gnd
Ingenieurgeologie (DE-588)4125674-8 gnd
Bodenmechanik (DE-588)4007385-3 gnd
topic_facet Geotechnik
Ingenieurgeologie
Bodenmechanik
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