1. Development of ADSC-FHWA Micropile Teaching Module into NHI Course Dr
Development of ADSC-FHWA Micropile Teaching Module into NHI Course Dr. Donald A. Bruce

2. Ground Improvement Technology – Micropiles: Original ADSC-FHWA Short Course
Contract awarded to ADSC by FHWA in 2002.
Course developed by Geosystems, geotechnica, and Schnabel Engineering under direction of IWM member Barry Siel (FHWA).
Based on FHWA Implementation Manual (DBM).
Deliverables
Participant’s Workbook
Instructor’s Guide
“Walk Through” (FHWA in D.C.)
Demonstration (WA State DOT)
Course now transferred to NHI

3. Update of FHWA course to NHI Course
FHWA awarded contract to Ryan R. Berg & Associates in 2004
Work involves updating original course to adhere to National Highway Institute requirements
Technical consultants included:
Dr. P. Sabatini, Lead Revision Author
ADSC Micropile Committee as Technical advisors (including IWM members T. Armour, D. Bruce, A. Cadden, T. Richards, J. Wolosick)
Adult Education specialist
Peer reviewers as required

4. Update of ADSC-FHWA Course to NHI Course
Technical scope of work includes:
Updating and revising FHWA Micropile Implementation Manual (originally developed by DBM)
Revising course curriculum materials
Instructor’s Guide
Participant’s Workbook
Visual Aids
Deliver course walk-through at NHI office
Deliver 2-day pilot presentation
Deliver regular 2-day course presentations

5. Contents of the Course Lesson 1: Introduction (45 mins)
Lesson 2: Definitions, Background, and Classification (Chapters 1 and 2 of Manual) (30 mins)
Lesson 3 – Applicability and Applications
Chapter 3 of Manual) (45 mins)
Lesson 4 – Construction Techniques and Materials (Chapter 4 of Manual) (60 mins)

6. Contents of the Course (continued)
Lesson 5 – Design Basics – Structural Support (150 mins)
Lesson 6 – Design for Slope Stabilization and Earth Retention (30 mins)
Lesson 7 – Pile Load Testing (Chapter 7 of Manual) (45 mins)
Lesson 8 – Construction Inspection – Quality Control (Chapter 8 of Manual) (30 mins)

7. Contents of the Course (continued)
Lesson 9 – Contracting Method (Chapter 9 of Manual) (20 mins)
Lesson 10 – Feasibility and Cost Data (Chapter 10 of Manual) (20 mins)
Lesson 11 – Review of Ongoing Research (20 mins)
Lesson 12 – Team Exercise (60 mins)
Closure (15 mins)

8. Revisions to FHWA Implementation Manual
Inclusion of information as appropriate from FOREVER, AASHTO ASD specifications, AASHTO LRFD specifications, GEC No. 4 (Anchored structures), and GEC No. 7 (Soil nail walls)
Update manual graphics
Inclusion of relevant applications of micropiles from recent case histories
Update load testing data forms and micropile inspection forms

9. Revisions to FHWA Implementation Manual
Major revisions to Chapter 5 (Design Basics – Structural Support
Strength and serviceability limit state conditions of single and groups of micropiles in compression, tension, and combined axial load and bending
Evaluation of lateral capacity of micropiles under seismic loading
Effects of liquefaction on lateral capacity and downdrag forces
Design of appropriate corrosion protection measures

10. Revisions to FHWA Implementation Manual
Major revisions to Chapter 5 (Design Basics – Structural Support (continued)
Design methods for inclined micropiles
Updated safety factors based on number of load tests performed
Description of failure mechanisms
Background on selection of k-values for buckling analyses and calculations for pile group centroids and moments of inertia

11. Revisions to FHWA Implementation Manual
Major revisions to Chapter 6 (Design for Slope Stabilization and Earth Retention)
Re-present Chapter 6 material in a manner stronger than a design concept without endorsing a specific design methodology
Revision and update of figures
Develop Case 1 non-reticulated micropiles with a concrete cap beam as a “structural frame”
Include section on economics of micropiles for slope stabilization

12. Revisions to FHWA Implementation Manual
Revisions to Chapter 7 (Pile Load Testing)
Provide specific guidance on number of load tests to be performed
Add recommendations on load testing procedures and interpretation of results consistent with other deep foundation load tests
Discuss integrity testing and Statnamic testing
Provide sequences for verification, proof, and creep tests
Provide appropriate acceptance criteria

13. Revisions to Course Curriculum
Editorial revisions to Instructor’s Guide, Participant’s Workbook, and PowerPoint slides (visual aids) to adhere to NHI requirements