Geotechnical Engineering Circular No. 9 Design, Analysis, and Testing of Laterally Loaded Deep Foundations that Support Transportation Facilities



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  • Design, Analysis, and Testing of Laterally Loaded Deep Foundations that Support Transportation Facilities
  • FOREWORD
    • Notice
    • Quality Assurance Statement
  • Technical Report Documentation Page
  • TABLE OF CONTENTS
    • FIGURES
    • TABLES
  • 1 INTRODUCTION AND OVERVIEW
    • 1.1 PURPOSE
    • 1.2 BACKGROUND AND HISTORY OF ANALYSIS OF LATERALLY LOADED DEEP FOUNDATIONS
    • 1.3 LITERATURE REVIEW
    • 1.4 ORGANIZATION OF MANUAL
  • 2 LATERAL LOAD APPLICATIONS AND SELECTION OF DEEP FOUNDATION TYPE FOR TRANSPORTATION PROJECTS
    • 2.1 LATERAL LOAD APPLICATIONS FOR TRANSPORTATION PROJECTS
      • 2.1.1 Typical Lateral Load Applications for Vertical Deep Foundations
      • 2.1.2 Batter Piles for Lateral Load Applications
    • 2.2 TYPES OF DEEP FOUNDATIONS ADDRESSED IN THIS MANUAL
    • 2.3 SELECTION OF DEEP FOUNDATION TYPES FOR RESISTANCE OF LATERAL LOADS
      • 2.3.1 Subsurface Conditions and Geomaterial Properties
      • 2.3.2 Properties of Deep Foundation Elements
      • 2.3.3 Constructability Considerations
        • General Constructability
        • Subsurface Conditions
        • Installation
        • Effects on Nearby Structures or Public Perception
      • 2.3.4 Cost Effectiveness
      • 2.3.5 Redundancy of the Foundation System
    • 2.4 EXCLUSIONS
  • 3 GEOTECHNICAL SITE CHARACTERIZATION FOR DESIGN OF LATERALLY LOADED DEEP FOUNDATIONS
    • 3.1 INTRODUCTION
    • 3.2 GEOTECHNICAL DESIGN PARAMETERS
      • 3.2.1 Soil Geotechnical Design Parameters
      • 3.2.2 Rock Geotechnical Design Parameters
    • 3.3 SUBSURFACE EXPLORATION
      • 3.3.1 Subsurface Exploration Program Requirements
      • 3.3.2 Subsurface Exploration Techniques
      • 3.3.3 Considerations for Subsurface Explorations when Lateral Loads are Significant
      • 3.3.4 Laboratory Testing
      • 3.3.5 Groundwater Conditions
  • 4 LRFD DESIGN REQUIREMENTS AND LIMIT STATES FOR LATERALLY LOADED DEEP FOUNDATIONS
    • 4.1 INTRODUCTION
    • 4.2 LOAD COMBINATIONS AND LOAD FACTORS
    • 4.3 STRENGTH LIMIT STATE FOR LATERALLY LOADED FOUNDATIONS
    • 4.4 SERVICE LIMIT STATE FOR LATERAL DISPLACEMENTS
    • 4.5 EXTREME EVENT LIMIT STATE
    • 4.6 CONSIDERATIONS FOR LIMIT EQUILIBRIUM APPLICATIONS
  • 5 DESIGN PROCESS AND TEAM ROLES FOR ANALYSIS OF LATERALLY LOADED DEEP FOUNDATIONS
    • 5.1 DESIGN PROCESS
      • Block 1 – Establish Project Type, Performance Requirements, and Constraints
      • Block a – Design-Build: Develop Project Performance Requirements
      • Block 2 – Define Preliminary Project Geotechnical Conditions
      • Block 3 - Develop Estimates of Applied Loads
      • Block 4 - Plan and Execute a Subsurface Investigation and Testing Program
      • Block 5 - Characterize Subsurface Conditions
      • Block 6 - Selection of Deep Foundation Type
      • Block 7 - Determine Initial Foundation Layout and Head Fixity Conditions
      • Block 8 – Estimate Pile Size and Depth and Determine Subsurface Conditions for Lateral Loading Analysis
      • Block 9 – Perform Analyses for Laterally Loaded Single Pile
      • Block 9.1 – Analyze Geotechnical Strength Limit State
      • Block 9.2 – Analyze Structural Strength Limit State
      • Block 9.3 – Analyze Service Limit State
      • Block 9.4 – Analyze Extreme Event Limit State
      • Block 10 – Perform Axial Design
      • Block 11 – Perform Group Analysis of Laterally Loaded Deep Foundations
      • Block 12 – Perform Final Structural Design of Foundation Elements and Connections to Caps
      • Block 13 – Perform Constructability Review
      • Block 14 - Develop Construction Documents
      • Block 15 – Develop Construction Cost Estimate
      • Block 16 – Design Considerations and Changes in Construction
      • Block 17 – Post-Construction Reporting
        • Additional Considerations regarding Design-Build Projects
    • 5.2 DESIGN TEAM ROLES
      • 5.2.1 Geotechnical Responsibilities in Lateral Loading Analysis
      • 5.2.2 Structural Responsibilities in Lateral Loading Analysis
      • 5.2.3 Other Team Members
    • 5.3 NEED FOR COMMUNICATION AND COORDINATION
  • 6 ANALYSIS FOR LATERALLY LOADED SINGLE DEEP FOUNDATION ELEMENTS
    • 6.1 INTRODUCTION
    • 6.2 GEOTECHNICAL STRENGTH LIMIT STATE OF LATERALLY LOADED PILES
    • 6.3 P-Y METHOD
      • 6.3.1 Characteristics of P-y curves
      • 6.3.2 Factors Affecting P-y Curves
      • 6.3.3 Limitations
      • 6.3.4 Recommendations Regarding P-y Method
    • 6.4 STRAIN WEDGE MODEL
      • 6.4.1 Recommendations Regarding Strain Wedge Model Method
    • 6.5 BROMS METHOD
      • 6.5.1 Broms Method for Cohesive Soils
      • 6.5.2 Broms Method for Cohesionless Soils
      • 6.5.3 Recommendations Regarding Broms Method
    • 6.6 OTHER ANALYSIS METHODS FOR LATERALLY LOADED DEEP FOUNDATIONS
    • 6.7 OTHER DESIGN CONSIDERATIONS
      • 6.7.1 Selection of Deep Foundation Type and Size
      • 6.7.2 Point of Fixity or Equivalent Depth of Fixity
        • 6.7.2.1 Fixity for Structural Analysis
        • 6.7.2.2 Fixity for Equivalent Cantilever Length for Buckling
        • 6.7.2.3 Recommendations Regarding Fixity
      • 6.7.3 Free Head vs. Fixed Head (Effect of Pile Cap)
      • 6.7.4 When to Consider Anchors or Braces for Lateral Support of Deep Foundations
      • 6.7.5 Scour
      • 6.7.6 Sloping Ground Surface
      • 6.7.7 Deep Foundations Socketed in Rock
      • 6.7.8 Loading Considerations
        • 6.7.8.1 Axial Loads
        • 6.7.8.2 Cyclical Loads
        • 6.7.8.3 Considerations for Transient Loads, Temporary Loads, and Permanent Loads
      • 6.7.9 Frost/Desiccation Depth, Loss of Contact, Etc.
      • 6.7.10 Other Design Considerations
        • 6.7.10.1 Variations in Subsurface Conditions
        • 6.7.10.2 Anchors and Bracing against Deep Foundations
        • 6.7.10.3 Increasing Lateral Resistance around Deep Foundations
  • 7 LATERAL ANALYSIS OF GROUPS OF DEEP FOUNDATIONS
    • 7.1 INTRODUCTION
    • 7.2 GROUP EFFECTS IN LATERAL LOADING
      • 7.2.1 Group Efficiency
      • 7.2.2 Load Distribution in a Group and the p-Multiplier Concept
        • 7.2.2.1 Development of p-Multipliers
        • 7.2.2.2 Recommendations for P-multipliers
        • 7.2.2.3 Considerations for Group Effects for Other Methods of Analysis
    • 7.3 LATERAL RESISTANCE CONTRIBUTION OF THE CAP
    • 7.4 ANALYSIS OF GROUPS OF DEEP FOUNDATION ELEMENTS
      • 7.4.1 Analysis of Deep Foundation Groups using Individual Pile Analysis
      • 7.4.2 Combined Lateral and Axial Loads from Frame Action
      • 7.4.3 Finite Element Programs
      • 7.4.4 Commentary on the Use of Computer Programs for Group Analysis
    • 7.5 USE OF BATTER PILES
      • 7.5.1 Concerns Regarding the Use of Batter Piles
      • 7.5.2 Loads in Batter Piles
      • 7.5.3 P-y Analysis of Batter Piles
    • 7.6 OTHER CONSIDERATIONS FOR GROUPS OF DEEP FOUNDATION ELEMENTS
  • 8 DESIGN FOR EXTREME EVENTS
    • 8.1 INTRODUCTION
    • 8.2 EXTREME EVENT SCOUR (CHECK FLOOD)
    • 8.3 SEISMIC
      • 8.3.1 Equivalent Static Seismic Force
      • 8.3.2 Liquefaction
      • 8.3.3 Time-History Analysis
    • 8.4 DESIGN FOR ICE AND COLLISIONS
      • 8.4.1 Ice Loads
      • 8.4.2 Vehicular Collision Loads
      • 8.4.3 Vessel Collision Loads
    • 8.5 COMBINATIONS OF EXTREME EVENTS
  • 9 DESIGN FOR EARTH RETENTION STRUCTURES
    • 9.1 OVERVIEW
    • 9.2 EARTH PRESSURES
    • 9.3 DETERMINATION OF EMBEDMENT DEPTH
    • 9.4 EVALUATION OF DEFORMATION
  • 10 DESIGN FOR SLOPE STABILIZATION
    • 10.1 OVERVIEW
    • 10.2 EXISTING SLOPE STABILITY
      • 10.2.1 Data Gathering
      • 10.2.2 Geotechnical Resistance Factors for Slope Stability
    • 10.3 DRILLED SHAFT ANALYSIS
      • 10.3.1 Background
      • 10.3.2 LRFD Analysis for Slope Stabilization
      • 10.3.3 Liang and Zeng (2002) Method
      • 10.3.4 Geotechnical Resistance of Drilled Shafts
        • 10.3.4.1 Service Limit State
        • 10.3.4.2 Strength Limit State
      • 10.3.5 Drilled Shaft Reinforcement Design
      • 10.3.6 Computer Applications
    • 10.4 MICROPILE SLOPE STABILIZATION
  • 11 STRUCTURAL DESIGN AND PERFORMANCE
    • 11.1 OVERVIEW
    • 11.2 STRUCTURAL DESIGN CONSIDERATIONS - GENERAL
      • 11.2.1 Effective Length and Buckling
    • 11.3 PROCEDURES FOR REINFORCED CONCRETE SECTIONS
      • 11.3.1 Material Properties - General
      • 11.3.2 Concrete
      • 11.3.3 Reinforcing Steel
      • 11.3.4 Casings
      • 11.3.5 Minimum and Maximum Amount of Longitudinal Steel Reinforcement
      • 11.3.6 Minimum Amount of Transverse Steel Reinforcement
      • 11.3.7 Concrete Cover and Cage Centering Devices
      • 11.3.8 Cases with Axial and Bending Moment (Linear Behavior)
      • 11.3.9 Axial Compression and Biaxial Bending for Non-Circular Members
      • 11.3.10 Cases with Axial and Bending Moment (Non-Linear Behavior)
      • 11.3.11 Pre-Stressed Concrete
    • 11.4 PROCEDURES FOR STRUCTURAL STEEL SECTIONS
      • 11.4.1 Material Properties - General
      • 11.4.2 Material Properties – Structural Steel
      • 11.4.3 Axial Compression
      • 11.4.4 Flexure
      • 11.4.5 Step-by-Step Procedure for Nominal Flexural Resistance for Linear Behavior
        • 11.4.5.1 Steel H-Section
        • 11.4.5.2 Steel Pipe Piles
      • 11.4.6 Combined Flexure and Axial Compression
      • 11.4.7 Cases with Axial and Bending Moment (Non-Linear Behavior)
      • 11.4.8 Steel Pipe Section
    • 11.5 PROCEDURES FOR STRUCTURAL COMPOSITE SECTIONS
      • 11.5.1 Structural Resistance
        • 11.5.1.1 Axial Compression
      • 11.5.2 Step-by-Step Procedure for Nominal Flexural Resistance”
  • 12 LATERAL LOAD TESTS
    • 12.1 CONSIDERATION FOR PLANNING LATERAL LOAD TESTS
      • 12.1.1 Lateral Load Tests for Design
      • 12.1.2 Lateral Load Tests in Construction to Verify the Design
      • 12.1.3 Considerations regarding Subsurface Characterization for Lateral Load Test Program
      • 12.1.4 Considerations for Test Pile Location
      • 12.1.5 Considerations for the Design of the Test Pile/Shaft
      • 12.1.6 Considerations for Test Pile Installation Methods
      • 12.1.7 Coordination with Axial Load Tests
    • 12.2 LATERAL LOAD TEST METHODS
      • 12.2.1 Static Lateral Load Tests
      • 12.2.2 Rapid Load Test
      • 12.2.3 Bidirectional Lateral Load Test
    • 12.3 INSTRUMENTATION
      • 12.3.1 External instrumentation
      • 12.3.2 Internal instrumentation
    • 12.4 DATA ANALYSIS
      • 12.4.1 Deflections from Strain Gauge Data
      • 12.4.2 Bending Moment Profiles
      • 12.4.3 Net Resistance (p) Using Piecewise Polynomial Curve Fitting
    • 12.5 LATERAL LOAD TEST REPORTS
    • 12.6 PUBLICATION OF LATERAL LOAD TESTS RESULTS
    • 12.7 LIMITATIONS OF LATERAL LOAD TESTS
    • 12.8 ALTERNATIVES TO LATERAL LOAD TESTS
  • 13 CONSTRUCTION CONSIDERATIONS
    • 13.1 CONSTRUCTION MANAGEMENT AND INSPECTION
    • 13.2 CONSTRUCTABILITY REVIEW
    • 13.3 DESIGN CONSIDERATIONS AND CHANGES IN CONSTRUCTION
    • 13.4 DRIVEN PILE, DRILLED SHAFT, AND BACKFILL CONSIDERATIONS
      • 13.4.1 Pile/Shaft Position and Alignment
      • 13.4.2 Driven Pile Installations
        • 13.4.2.1 Equipment Selection
        • 13.4.2.2 Sequence of Driving
        • 13.4.2.3 Driving Refusal
        • 13.4.2.4 Splicing
        • 13.4.2.5 Jetting and Pre-boring
      • 13.4.3 Drilled Shafts
        • 13.4.3.1 Pre-Drilling and Surface Casing
        • 13.4.3.2 Structural Integrity
        • 13.4.3.3 Rock Sockets
      • 13.4.4 Backfill and Grading
  • 14 REFERENCES
  • APPENDIX A EXAMPLE P-Y CURVES AND PARAMETERS FOR VARIOUS SUBSURFACE CONDITIONS BASED ON AVAILABLE PUBLISHED SOURCES
    • A.1 P-Y CURVE FOR SOFT CLAY WITH FREE WATER (MATLOCK 1970)
      • Static Loading
      • Cyclic Loading
    • A.2 P-Y CURVE FOR STIFF CLAY WITH FREE WATER (REESE ET AL. 1975)
      • Static Loading
      • Cyclic Loading
    • A.3 P-Y CURVE FOR STIFF CLAY WITH NO FREE WATER (REESE AND WELCH 1975)
      • Static Loading
      • Cyclic Loading
    • A.4 P-Y CURVE FOR SANDS (REESE ET AL. 1974)
    • A.5 P-Y CURVES FOR WEAK ROCK (REESE 1997)
      • First segment:
      • Second segment:
      • Third segment:
    • A.6 P-Y CURVES FOR LIQUEFIED SANDS (ROLLINS ET AL. 2005)
    • A.7 SLOPING GROUND
      • A.7.1 Ultimate Soil Resistance
  • APPENDIX B EXAMPLE PROBLEMS AND/OR CASE HISTORIES
    • B.1 SINGLE PILE LATERAL ANALYSIS FOR THE DESIGN OF AN INTELLIGENT TRANSPORTATION SYSTEM (ITS) POLE
      • Step 1: Determine Idealized Soil Profile and Geotechnical Design Parameters
      • Step 2: Obtain Preliminary Structural Design
      • Step 3: Determine Factored Loads
      • Step 4: Obtain Bending Moment, Shear, and Lateral Deformation Profiles
      • Step 5: Assess Pile Structural Integrity
      • Step 6: Final Design
    • B.2 PILE GROUP LATERAL ANALYSIS FOR DESIGN OF ABRIDGE PIER
      • Step 1: Determine Idealized Soil Profile and Geotechnical Design Parameters
      • Step 2: Obtain Preliminary Structural Design
      • Step 3: Determine p-multipliers
      • Step 4: Determine Factored Loads
      • Step 4: Obtain Bending Moment, Shear, and Lateral Deformation Profiles
      • Step 5: Assess Pile Structural Integrity
      • Step 6: Final Design
  • APPENDIX C EXAMPLE LOAD TEST RESULTS AND INTERPRETATION AND DETERMINATION OF P-Y CURVES
    • C.1 SUBSURFACE CONDITIONS ATTEST SITE
    • C.2 LATERAL LOAD TEST SET-UP
    • C.3 LATERAL LOAD TEST RESULTS
  • APPENDIX D GUIDE SPECIFICATION FOR LATERAL LOAD TESTS
    • 1.0 DESCRIPTION
    • 1.1 Related Specifications
      • 1.1.1 Specification Sections:
      • 1.1.2 Reference Standards:
    • 1.2 Submittals
      • 1.2.1 Qualifications
      • 1.2.2 Lateral Load Testing Plan
      • 1.2.3 Test Pile Construction Inspection Records
      • 1.2.4 Lateral Load Testing Report
    • 1.3 Pre-construction meeting
    • 2.0 MATERIALS
    • 3.0 EXECUTION.
  • APPENDIX E LITERATURE REVIEW
    • GEC No. 9: Design and Analysis of Laterally Loaded Deep Foundations Literature Review
      • 1. INTRODUCTION
      • 2. SCOPE OF RESEARCH
      • 3. BACKGROUND
      • 4. STATE DOT RESEARCH METHOD
      • 5. SUMMARY OF STATE DOT RESEARCH
        • 5.1 DESIGN METHODOLOGIES
        • 5.2 OTHER DESIGN TOPICS
          • 5.2.1 Fixity Depth
          • 5.2.2 Critical Depth
          • 5.2.3 Group Multipliers
          • 5.2.4 Head Fixity
          • 5.2.5 Deflection Limits
          • 5.2.6 Seismic
          • 5.2.7 Design Procedure
          • 5.2.8 Engineer Responsibilities
          • 5.2.9 Resistance Factor
      • 6. OTHER US-BASED SOURCES
        • 6.1 BROMS (A, B)
        • 6.2 DAVISSON AND ROBINSON (1965)
        • 6.3 REESE (1984, 1985)
        • 6.4 COMP MANUAL (1993)
        • 6.5 AMERICAN PETROLEUM INSTITUTE (API) (2000)
        • 6.6 FHWA NHI-10-016: DRILLED SHAFTS CONSTRUCTION PROCEDURES AND LRFD DESIGN METHODS (2010)
        • 6.7 FHWA-NHI-11-032: LRFD SEISMIC ANALYSIS AND DESIGN OF TRANSPORTATION GEOTECHNICAL FEATURES AND STRUCTURAL FOUNDATIONS (2011)
        • 6.8 LPILE TECHNICAL MANUAL (2012)
        • 6.9 AASHTO LRFD BRIDGE DESIGN SPECIFICATIONS (2014)
      • 7. INTERNATIONAL RESEARCH METHOD
      • 8. SUMMARY OF INTERNATIONAL PRACTICE
        • 8.1 EUROCODE AND UNITED KINGDOM
        • 8.2 AUSTRALIA
        • 8.3 HONG KONG
        • 8.4 CHINA
        • 8.5 INTERNATIONAL BUILDING CODE (IBC) (2012)
        • 8.6 ALP VERSION 19.1 (USER MANUAL)
      • 9. SOFTWARE
      • 10. CASE HISTORY SUMMARY
        • 10.1 DATABASE SUMMARIES
        • 10.2 DOT LATERAL LOAD TEST STUDIES
          • Missouri
          • North Carolina
          • Ohio
          • Colorado
          • Joint program by Utah, Arizona, California, New York, and Washington:
          • Other Testing Programs or Case Histories
      • 11. GAPS IN THE STATE OF THE PRACTICE
        • 11.1 STRAIN WEDGE MODEL
        • 11.2 SLOPE REINFORCEMENT OR STABILIZATION
        • 11.3 ROCK SOCKET DESIGN
        • 11.4 INTERMEDIATE GEOMATERIALS (IGM)
        • 11.5 SEISMIC DESIGN CONSIDERATIONS
        • 11.6 BATTER PILES
      • 12. PRELIMINARY ASSESSMENT OF METHOD FOR GEC 9
        • 12.1 PRELIMINARY DESIGN
        • 12.2 FINAL DESIGN

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