Engineering Design Manual - Helical Anchors

1 Engineering Design Manual Table of Contents Helical Anchors Design Manual ---------------------------------------- --------------5. Introduction ---------------------------------------- ---------------------------------------- ------------------- 6. Advantages------------------------------ ---------------------------------------- ------------------------------ 6. Unique Features ---------------------------------------- ---------------------------------------- ------------- 6. Description ---------------------------------------- ---------------------------------------- -------------------- 7. Installation ---------------------------------------- ---------------------------------------- -------------------- 8.

2 applications ---------------------------------------- ---------------------------------------- ------------------ 8. Design Guide ---------------------------------------- ---------------------------------------- ----------------- 8. Predicting Capacity ---------------------------------------- ---------------------------------------- -------------------------- 8. Individual Bearing Capacity ---------------------------------------- ---------------------------------------- -------------- 9. Non-Cohesion Soil ---------------------------------------- ---------------------------------------- -------------------------- 10.

3 Cohesive Soil ---------------------------------------- ---------------------------------------- ---------------------------------- 12. Projected Helical plates areas ---------------------------------------- ---------------------------------------- ----------- 12. Torque Anchor Capacity ---------------------------------------- ---------------------------------------- ----------------- 14. Ultimate Skin Resistance ---------------------------------------- ---------------------------------------- ----------------- 15. Method ---------------------------------------- ---------------------------------------- --------------------------------------- 16.

4 Method ---------------------------------------- ---------------------------------------- --------------------------------------- 16. Method ---------------------------------------- ---------------------------------------- --------------------------------------- 16. Helical Tie Back Anchor Considerations ---------------------------------------- ----------------------------------- 17. Design Example 1 Cohesive Soil ---------------------------------------- ---------------------------------------- ----- 19. Design Example 2 Non-cohesive Soil ---------------------------------------- --------------------------------------- 21.

5 Helical Anchors Operational Guide ---------------------------------------- -------- 23. Procedure ---------------------------------------- ---------------------------------------- -------------------- 24. Length ---------------------------------------- ---------------------------------------- ------------------------ 25. Connection to the Structure ---------------------------------------- ------------------------------------- 25. Load Testing ---------------------------------------- ---------------------------------------- ---------------- 25. Torsional Resistance ---------------------------------------- ---------------------------------------- ------ 25.

6 Clean up ---------------------------------------- ---------------------------------------- --------------------- 26. Push Piers Design Manual ---------------------------------------- -------------------- 27. Introduction ---------------------------------------- ---------------------------------------- ----------------- 28. Push Pier Advantages ---------------------------------------- ---------------------------------------- ---- 28. Description ---------------------------------------- ---------------------------------------- ------------------ 28. Installation ---------------------------------------- ---------------------------------------- ------------------ 29.

7 applications ---------------------------------------- ---------------------------------------- ---------------- 29. Design Guide ---------------------------------------- ---------------------------------------- --------------- 30. Predicting Capacity ---------------------------------------- ---------------------------------------- ------------------------ 30. Page | 2. EDM Rev 02 2014, Helical Anchors Inc. Push Pier Operational Guide ---------------------------------------- ----------------- 32. Foundation Exposure ---------------------------------------- ---------------------------------------- --- 33. Bracket Installation ---------------------------------------- ---------------------------------------- ----- 33.

8 Under-footing 2-piece Pier Bracket ---------------------------------------- ---------------------------------------- ------ 33. 2-Piece Plate Pier Bracket ---------------------------------------- ---------------------------------------- ------------------ 33. Driving Pier Sections ---------------------------------------- ---------------------------------------- --- 34. Cutting Final Pier Section--------------------------------- ---------------------------------------- ---- 34. Transferring Loads to Piers ---------------------------------------- ---------------------------------- 34. Clean Up ---------------------------------------- ---------------------------------------- -------------------- 35.

9 Corrosion Overview ---------------------------------------- ----------------------------- 36. Introduction ---------------------------------------- ---------------------------------------- --------------- 37. Soil Resistivity ---------------------------------------- ---------------------------------------- ------------ 37. Soil pH-------------------------------------- ---------------------------------------- ------------------------- 38. Zinc Galvanization ---------------------------------------- ---------------------------------------- ------ 38. Appendix A - Products Strength Rating ---------------------------------------- --- 40.

10 Helical Anchor Technical Data ---------------------------------------- ------------------------------ 41. Table A1: Helical Anchors Product Rating ---------------------------------------- ------------------ 49. Table A2: General Properties of Helical Anchors Shaft ---------------------------------------- - 50. Table A3: Ultimate Capacities of Helical Anchors Helices ------------------------------------- 50. Appendix B - Evaluation Report ---------------------------------------- ------------- 51. Page | 3. EDM Rev 02 2014, Helical Anchors Inc. Definition of Terms Resistance - A force developed in opposition to a load applied to a structural system.