Theory and Practice of Pile Foundations

Pile Foundations are an essential basis for many structures. It is vital that they be designed with the utmost reliability, because the cost of failure is potentially huge. Covering a whole range of design issues relating to pile design, this book presents economical and efficient design solutions and demonstrates them using real world examples. Coverage includes nonlinear response of single piles to vertical or torsional loading and to cyclic lateral loading, as well as prediction of nonlinear response of lateral pile groups, vertically loaded pile groups and the design of slope stabilising piles. Most solutions are provided as closed-form expressions. Theory and Practice of Pile Foundations is: illustrated with case studies accompanied by practical applications in Excel and MathCad the first book to incorporate nonlinear interaction into pile design. A valuable resource for students of geotechnical engineering taking courses in foundations and a vital tool for engineers designing pile foundations.

Strength and Stiffness from In Situ TestsStandard Penetration Tests (SPT)Cone Penetration TestsSoil StiffnessStiffness and Strength of RockCapacity of Vertically Loaded PilesIntroductionCapacity of Single PilesCapacity of Single Piles in RockNegative Skin FrictionCapacity of pile groupsMechanism and Models for Pile-Soil InteractionConcentric Cylinder Model (CCM)Nonlinear Concentric Cylinder ModelTime-Dependent CCMTorque-Rotation Transfer ModelCoupled Elastic Model for Lateral PilesElastic-Plastic Model for Lateral PilesVertically Loaded Single PilesIntroduction Load Transfer Models Overall Pile–Soil InteractionParametric Study Load SettlementSettlement Influence Factor Summary Capacity for Strain Softening SoilCapacity and Cyclic AmplitudeTime-Dependent Response of Vertically Loaded PilesVisco-Elastic Load Transfer Behavior Visco-Elastic Consolidation Settlement of Pile GroupsIntroduction Empirical Methods Shallow Footing AnalogyNumerical MethodsBoundary Element Approach: GASGROUPElastic Solutions for Laterally Loaded PilesIntroductionOverall Pile ResponseValidationParametric StudySubgrade Modulus and Design ChartsPile Group Response ConclusionLaterally Loaded Rigid PilesIntroductionElastic Plastic Solutions Capacity and Lateral-Moment Loading LociComparison with Existing SolutionsIllustrative Examples SummaryLaterally Loaded Free-Head PilesIntroductionSolutions for Pile-Soil System Slip Depth Versus Nonlinear Response Calculations for Typical PilesComments on Use of Current SolutionsResponse of Piles Under Cyclic LoadingResponse of Free-Head GroupsSummaryStructural Nonlinearity and Response of Rock-Socket PilesIntroduction Solutions for Laterally Loaded Shafts Nonlinear Structural Behavior of Shafts Nonlinear Piles in Sand/Clay Rock-Socketed Shafts Conclusion Laterally Loaded Pile Groups Introduction Overall Solutions for a Single Pile Nonlinear Response of Single Piles and Pile Groups Examples ConclusionsDesign of Passive PilesIntroduction Mechanism for Passive Pile-Soil Interaction Elastic-Plastic (EP) Solutions pu -Based Solutions (Rigid Piles) E-E, EP-EP Solutions (Deep Sliding–Flexible Piles) Design Charts Case Study ConclusionPhysical Modeling on Passive PilesIntroduction Apparatus and Test Procedures Test Results Simple Solutions Conclusion Acknowledgment References Index

Wei Dong Guo is Senior Lecturer in the School of Engineering, Griffith University, Queensland, Australia