Development of ADSC-FHWA Micropile Teaching Module into NHI Course
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Development of ADSC-FHWA Micropile Teaching Module into NHI Course Dr. Donald A. Bruce. Ground Improvement Technology – Micropiles: Original ADSC-FHWA Short Course. Contract awarded to ADSC by FHWA in 2002.

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

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Development of adsc fhwa micropile teaching module into nhi course dr donald a bruce

Development of ADSC-FHWA Micropile Teaching Module into NHI CourseDr. Donald A. Bruce


Ground improvement technology micropiles original adsc fhwa short course

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


Update of fhwa course to nhi course

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


Update of adsc fhwa course to nhi course

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


Contents of the course

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)


Contents of the course continued

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)


Contents of the course continued1

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)


Revisions to fhwa implementation manual

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


Revisions to fhwa implementation manual1

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


Revisions to fhwa implementation manual2

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


Revisions to fhwa implementation manual3

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


Revisions to fhwa implementation manual4

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


Revisions to course curriculum

Revisions to Course Curriculum

  • Editorial revisions to Instructor’s Guide, Participant’s Workbook, and PowerPoint slides (visual aids) to adhere to NHI requirements


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