Soil Screw - Design Manual

Design Manual

TABLE OF CONTENTS

CHAPTER 1.0
Introduction and Applications

1.1.0 - Purpose and Scope
1.2.0 - Soil Nail Technology
1.2.1 - History of Soil Nailing
1.2.2 - Definition
1.2.3 - Screw Anchor Soil Nails
1.2.4 - Grouted Soil Nails
1.2.5 - Comparison with Tieback Walls
1.2.6 - Comparison with MSE Walls
1.3 .0- Soil Nail Application
1.4.0 - Advantages of Soil Nail Walls
1.5.0 - Limitations

CHAPTER 2.0
Soil Nailing with the SOIL SCREW^®Retention Wall System

2.1.0 - Designing with the SOIL SCREW^®Retention Wall System
2.1.1 - Facing Deformation
2.1.2 - Pullout Resistance
2.1.3 - Tensile Strength of a Screw Anchor
2.2.0 - Data Required for Soil Nail Design
2.2.1 - Soil Parameters
2.2.2 - Surcharges and Loading Conditions
2.2.3 - Drainage and Groundwater Conditions
2.3 .0- Facing Considerations
2.3.1 - Temporary Facings
2.3.2 - Permanent Facings
Figures 2.3.4

CHAPTER 3.0
Design Guidelines for Soil Nailed Walls Utilizing the
SOIL SCREW^®Retention Wall System

3.1.0 - Site Investigation
3.1.1 - Regional Geology
3.1.2 - Field Reconnaissance
3.1.3 - Subsurface Exploration
3.1.4 - Laboratory Testing
3.2.0 - Preliminary Feasibility Assessment
3.2.1 - Ground Conditions Best Suited for Soil Nailing with the
0.0.0 - SOIL SCREW^®Retention Wall System
3.2.2 - Ground Conditions Considered Not Favorable for Soil Nailing Using the
0.0.0 - SOIL SCREW^®Retention Wall System
3.2.3 - Design Charts
3.3.0 - Overview of Design Methodology
3.4.0 - External Stability
3.4.1 - Earth Pressures for External Stability
3.4.2 - Sliding Stability
3.4.3 - Bearing Capacity
3.5.0 - Internal Stability
3.5.1 - Allowable Nail Strength
3.5.2 - Pullout Capacity of Nail
3.5.2.1 - Pullout of Screw Anchors in Sands and Silts
3.5.3 - Facing Design
3.5.3.1 - Flexural Strength of the Facing
3.5.3.2 - Punching Shear Strength of the Facing
3.5.4 - Cantilever Design Check
3.5.5 - Nail Strength Envelope
3.5.6 - Internal Stability Limit Equilibrium Analysis
3.6.0 - Global Stability
3.7.0 - Summarized Design Steps
3.8.0 - Special Design Considerations
3.8.1 - Tiered Walls
3.8.2 - Surcharge Loads
Figure 3.8.1

CHAPTER 4.0
Construction - Materials, Installation and Monitoring

4.1.0 - Materials
4.1.1 - Screw Anchors
4.1.2 - Wall Connectors
4.1.3 - Shotcrete
4.1.4 - Drainage Materials
4.2.0 - Alternate Facing Materials
4.3.0- Installation Equipment
4.4.0 - Installation, Monitoring and Testing
4.4.1 - Installation
4.4.2 - Monitoring and Testing

CHAPTER 5.0
Specifications

5.1 Product Specifications (Owner-Designed Walls with Product Specifications)
5.2 Performance Specification (Design-Build Specification with Performance Requirements)

CHAPTER 6.0
References

APPENDIX A
Design Charts and Design Example

Appendix A1 - Design Charts

Figure A-1 SOIL SCREW^®Retention Wall System Preliminary Design Chart.
Figure A-2 SOIL SCREW^®Retention Wall System Preliminary Design Chart.
Figure A-3 SOIL SCREW^®Retention Wall System Preliminary Design Chart.

Appendix A2 - Design Example

Attachment EX1 - Internal Stability Analysis Using GoldNail

Attachment EX2 - Global Stability Analysis Using STABL GoldNail

APPENDIX B
Example Specifications (Permanent and Temporary)

Appendix B1 -
(Owner-Design) Guide Specification for SOIL SCREW^®Retention Wall System

Appendix B2 -
(Design-Build Solicitation) Guide Specification for SOIL SCREW^®Retention Wall System