6 th International Workshop on Micropiles Tokyo, Japan, August 24-27, 2004 Development of ADSC-FHWA Micropile Teaching Module into NHI Course Dr. Donald A. Bruce

6 th International Workshop on Micropiles Tokyo, Japan, August 24-27, 2004 Contract awarded to ADSC by FHWA in Contract awarded to ADSC by FHWA in Course developed by Geosystems, geotechnica, and Schnabel Engineering under direction of IWM member Barry Siel (FHWA). Course developed by Geosystems, geotechnica, and Schnabel Engineering under direction of IWM member Barry Siel (FHWA). Based on FHWA Implementation Manual (DBM). Based on FHWA Implementation Manual (DBM). Deliverables Deliverables –Participant’s Workbook –Instructor’s Guide –“Walk Through” (FHWA in D.C.) –Demonstration (WA State DOT) –Course now transferred to NHI Ground Improvement Technology – Micropiles: Original ADSC-FHWA Short Course

6 th International Workshop on Micropiles Tokyo, Japan, August 24-27, 2004 Update of FHWA course to NHI Course FHWA awarded contract to Ryan R. Berg & Associates in 2004 FHWA awarded contract to Ryan R. Berg & Associates in 2004 Work involves updating original course to adhere to National Highway Institute requirements Work involves updating original course to adhere to National Highway Institute requirements Technical consultants included: 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

6 th International Workshop on Micropiles Tokyo, Japan, August 24-27, 2004 Technical scope of work includes: Technical scope of work includes: –Updating and revising FHWA Micropile Implementation Manual (originally developed by DBM) –Revising course curriculum materials Instructor’s Guide Instructor’s Guide Participant’s Workbook Participant’s Workbook Visual Aids Visual Aids –Deliver course walk-through at NHI office –Deliver 2-day pilot presentation –Deliver regular 2-day course presentations Update of ADSC-FHWA Course to NHI Course

6 th International Workshop on Micropiles Tokyo, Japan, August 24-27, 2004 Contents of the Course Lesson 1: Introduction (45 mins) Lesson 1: Introduction (45 mins) Lesson 2: Definitions, Background, and Classification (Chapters 1 and 2 of Manual) (30 mins) Lesson 2: Definitions, Background, and Classification (Chapters 1 and 2 of Manual) (30 mins) Lesson 3 – Applicability and Applications Lesson 3 – Applicability and Applications Chapter 3 of Manual) (45 mins) Lesson 4 – Construction Techniques and Materials (Chapter 4 of Manual) (60 mins) Lesson 4 – Construction Techniques and Materials (Chapter 4 of Manual) (60 mins)

6 th International Workshop on Micropiles Tokyo, Japan, August 24-27, 2004 Lesson 5 – Design Basics – Structural Support (150 mins) Lesson 5 – Design Basics – Structural Support (150 mins) Lesson 6 – Design for Slope Stabilization and Earth Retention (30 mins) Lesson 6 – Design for Slope Stabilization and Earth Retention (30 mins) Lesson 7 – Pile Load Testing (Chapter 7 of Manual) (45 mins) Lesson 7 – Pile Load Testing (Chapter 7 of Manual) (45 mins) Lesson 8 – Construction Inspection – Quality Control (Chapter 8 of Manual) (30 mins) Lesson 8 – Construction Inspection – Quality Control (Chapter 8 of Manual) (30 mins) Contents of the Course (continued)

6 th International Workshop on Micropiles Tokyo, Japan, August 24-27, 2004 Lesson 9 – Contracting Method (Chapter 9 of Manual) (20 mins) Lesson 9 – Contracting Method (Chapter 9 of Manual) (20 mins) Lesson 10 – Feasibility and Cost Data (Chapter 10 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 11 – Review of Ongoing Research (20 mins) Lesson 12 – Team Exercise (60 mins) Lesson 12 – Team Exercise (60 mins) Closure (15 mins) Closure (15 mins) Contents of the Course (continued)

6 th International Workshop on Micropiles Tokyo, Japan, August 24-27, 2004 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) 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 Update manual graphics Inclusion of relevant applications of micropiles from recent case histories Inclusion of relevant applications of micropiles from recent case histories Update load testing data forms and micropile inspection forms Update load testing data forms and micropile inspection forms

6 th International Workshop on Micropiles Tokyo, Japan, August 24-27, 2004 Revisions to FHWA Implementation Manual Major revisions to Chapter 5 (Design Basics – Structural Support 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

6 th International Workshop on Micropiles Tokyo, Japan, August 24-27, 2004 Revisions to FHWA Implementation Manual Major revisions to Chapter 5 (Design Basics – Structural Support (continued) 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

6 th International Workshop on Micropiles Tokyo, Japan, August 24-27, 2004 Revisions to FHWA Implementation Manual Major revisions to Chapter 6 (Design for Slope Stabilization and Earth Retention) 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

6 th International Workshop on Micropiles Tokyo, Japan, August 24-27, 2004 Revisions to FHWA Implementation Manual Revisions to Chapter 7 (Pile Load Testing) 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

6 th International Workshop on Micropiles Tokyo, Japan, August 24-27, 2004 Revisions to Course Curriculum Editorial revisions to Instructor’s Guide, Participant’s Workbook, and PowerPoint slides (visual aids) to adhere to NHI requirements Editorial revisions to Instructor’s Guide, Participant’s Workbook, and PowerPoint slides (visual aids) to adhere to NHI requirements