• ♦Manual Notice 2020-1
• ►1. Manual Overview
  • ►1. About this Manual
    • ♦Purpose of the Manual
    • ♦Updates
    • ♦Organization
    • ♦Feedback
• ►2. Soil Surveys
  • ►1. Soil Surveys
    • ♦Overview
    • ♦Review of Existing Data
    • ♦Hole Location
    • ♦Bridges
    • ♦Retaining Walls
    • ♦Other Structures
    • ♦Slopes and Embankments
• ►3. Field Operations
  • ►1. Drilling
    • ♦Overview
    • ♦Access
    • ♦Utility Clearance
    • ♦Traffic Control
    • ♦Drill Hole Filling
  • ►2. Sampling Methods
    • ♦Overview
  • ►3. Field Testing
    • ♦Texas Cone Penetration (TCP) Test
    • ♦Standard Penetration Test (SPT)
    • ♦In-Place Vane Shear Test
    • ♦Torvane and Pocket Penetrometer
• ►4. Soil and Bedrock Logging
  • ►1. Logging
    • ♦Material Order of Description
    • ♦Material
    • ♦Density or Consistency, Hardness
    • ♦Moisture
    • ♦Color
    • ♦Cementation
    • ♦Descriptive Adjectives
    • ♦Unified Soil Classification System (ASTM D2487)
    • ♦Rock Quality Designation (RQD) and Percent Recovery
    • ♦Log Form
• ►5. Foundation Design
  • ►1. Foundation Type Selection
    • ♦Foundation Selection Factors
    • ♦Foundation Guidelines for Widening Structures
  • ►2. Interpretation of Soil Data
    • ♦Overview
    • ♦Disregard Depth
    • ♦Texas Cone Penetration Test
    • ♦Laboratory Test
  • ►3. Drilled Shafts
    • ♦Overview
    • ♦Belled Shafts
    • ♦Standing Water
    • ♦Wing Shafts
    • ♦Service Loads
    • ♦Drilled Shaft Reinforcement
    • ♦Drilled Shaft Integrity Testing
    • ♦Layout Notes
  • ►4. Piling
    • ♦Overview
    • ♦Wing Piling
    • ♦Steel Piling Special Considerations
    • ♦Difficult Driving
    • ♦Service Loads
    • ♦Dynamic Monitoring
  • ♦5. Foundation Load Testing
  • ►6. Scour
    • ♦Analysis
    • ♦New Bridges with Known Foundations
    • ♦Existing Bridges with Known Foundations
    • ♦Existing Bridges with Unknown Foundations
    • ♦Bridge Class Culverts
    • ♦Scour Critical Bridges
    • ♦Stone Protection at Bridges
• ►6. Retaining Walls
  • ►1. Retaining Wall Selection
    • ♦Overview
  • ►2. Retaining Wall Layouts
    • ♦General Content Layout
    • ♦Plans for Specific Wall Types
  • ►3. Design Considerations
    • ♦General Design
    • ♦Design Criteria for Specific Wall Types
  • ►4. Excavation Support
    • ♦Overview
    • ♦Trench Excavation Protection
    • ♦Temporary Special Shoring
• ►7. Slope Stability
  • ►1. Overview
    • ♦Overview
  • ►2. Analysis and Design
    • ♦Global Stability Analysis
• ♦Index

Geotechnical Manual

July 2020

Copyright © 2020 by Texas Department of Transportation
All rights reserved.

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