DESIGN AND CONSTRUCTION OF SUBGRADES IN POOR, WET, AND/OR SATURATED SOIL CONDITIONS TUTORIAL - TUTORIAL GUIDE HELP FREE

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CONTENTS DESIGN AND CONSTRUCTION OF SUBGRADES IN POOR, WET, AND/OR SATURATED SOIL CONDITIONS TUTORIAL Special Practices for Design and Construction of Subgrades in Poor, Wet, and/or Saturated Soil Conditions Technical Report Documentation Page TABLE OF CONTENTS CHAPTER 1: INTRODUCTION Background Project Summary Traditional Subgrade Enhancement Choices Drainage Subgrade (Embankment) Soil Construction Specifications General Design Considerations Construction Notes and Procedures Subgrade Enhancement Subgrade Soil Enhancement Procedures for Natural Soils Drainage Soil Compaction Soil Modification Soil Stabilization Geosynthetics Substitution CHAPTER 2: SUBGRADE ENHANCEMENT PROCEDURES USED IN MINNESOTA General Questionnaire Development Reply Summaries Visits to Individual Agencies Summary of Applications Agencies visited and procedures used Database developed with location of projects Variables Database Setup (Appendix C, Appendix D) CHAPTER 3: BEST PRACTICE SUMMARIES FOR SPECIAL SUBGRADE ENHANCEMENT PROCEDURES IN MINNESOTA Introduction Natural Soils Specifications General Design Considerations Construction Notes and Procedures Drying/Modification/Stabilization Drying/Modification with Lime Stabilization Using Fly Ash Geosynthetics Separation – geofabrics Reinforcement – geogrids Substitution Select Granular Breaker Run Limestone Wood Chips Shredded Tires Design and Construction Tutorial Good Subgrades in Poor, Wet, and/or Saturated Soil Conditions tutorials pdf Software user guide Manuals free Help me Bible Table of Contents CHAPTER 4: RECOMMENDATIONS Recommendations REFERENCES APPENDIX A: AGENCY QUESTIONNAIRES Questionnaire on Existing Projects and Practices APPENDIX B: AGENCY RESPONSES TO QUESTIONNAIRES Question 1: Modification: Question 2: Stabilization Question 3: Reinforcement Question 4: Substitution Question 5: Are there any other types of construction which you feel would fit into thescope of this project? APPENDIX C: AGENCY INTERVIEWS CONDUCTED DURING SUMMER, 2002 APPENDIX D: MINNESOTA SUBGRADE ENHANCEMENT INSTALLATION LOCATIONS Modification and Stabilization Installations Separation Installations Reinforcement Installations Substitution Installations APPENDIX E: PHOTOS LIST OF FIGURES Common Geosynthetics Examples of Types of Geogrids Sequence of Construction Fill placement sequence on soft foundations Fill placement on foundation with no mudwave Frost heave resulting from ice lenses 6-in Bulldozer spreading Lumber-Mill Sawdust Wood Chips above Geofabric Tire shreds encapsulated in geofagric Tire Shreds Placing tire shreds Loader distributing and compacting tire shreds LIST OF TABLES Methods for incorporating water prior to compaction Limitations and Safety Precautions for Lime and Fly Ash Modification Approximate strength values resulting from fly-ash modification Limitations and Safety Precautions for Asphalt Treatment Approximate (Resilient Modulus) for Stabilized Pavement Materials Cement Stabilization Requirements for Various Soils Criteria for Soil-Cement by Wet-Dry and Freeze-Thaw Durability Tests Summary of some properties of cement stabilized soil Limitations and Safety Precautions for Cement and Fly Ash Stabilization Structural Coefficients for Fly Ash Stabilized Materials Total transverse and longitudinal cracks at 6 years Mn/DOT Geosynthetic Classification (Spec 3733) Typical Values of Transmissivity (In-Plane) of Geotextile Characteristics of Common Lightweight Fill Materials Advantages, Disadvantages of Common Lightweight Fill Materials Characteristics of Common Lightweight Fill Materials Expanded Polystyrene Foam (EPS) Summary of Subgrade Enhancement Procedures, MN Counties/Cities Breaker-Run Limestone and MnDOT Class 5 Gradations Typical costs of Wood Chips Subgrade Soil Enhancement Flow Chart Subgrade Soil Enhancement Flow Chart Subgrade Soil Enhancement Flow Chart Subgrade Soil Enhancement Flow Chart