D. Bruce (U.S.A.) “Development of ADSC

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D. Bruce (U.S.A.) “Development of ADSC
Development of ADSC-FHWA Micropile Teaching
Module into NHI Course
Dr. Donald A. Bruce
6th International Workshop on Micropiles
Tokyo, Japan, August 24-27, 2004
GEOSYSTEMS, L.P.
Ground Improvement Technology – Micropiles:
Original ADSC-FHWA Short Course
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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
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Participant’s Workbook
Instructor’s Guide
“Walk Through” (FHWA in D.C.)
Demonstration (WA State DOT)
Course now transferred to NHI
6th International Workshop on Micropiles
Tokyo, Japan, August 24-27, 2004
GEOSYSTEMS, L.P.
Update of FHWA course to NHI Course
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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
6th International Workshop on Micropiles
Tokyo, Japan, August 24-27, 2004
GEOSYSTEMS, L.P.
Update of ADSC-FHWA Course to NHI Course
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Technical scope of work includes:
– Updating and revising FHWA Micropile
Implementation Manual (originally developed by
DBM)
– Revising course curriculum materials
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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
6th International Workshop on Micropiles
Tokyo, Japan, August 24-27, 2004
GEOSYSTEMS, L.P.
Contents of the Course
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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)
6th International Workshop on Micropiles
Tokyo, Japan, August 24-27, 2004
GEOSYSTEMS, L.P.
Contents of the Course (continued)
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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)
6th International Workshop on Micropiles
Tokyo, Japan, August 24-27, 2004
GEOSYSTEMS, L.P.
Contents of the Course (continued)
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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)
6th International Workshop on Micropiles
Tokyo, Japan, August 24-27, 2004
GEOSYSTEMS, L.P.
Revisions to FHWA Implementation Manual
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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
6th International Workshop on Micropiles
Tokyo, Japan, August 24-27, 2004
GEOSYSTEMS, L.P.
Revisions to FHWA Implementation Manual
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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
6th International Workshop on Micropiles
Tokyo, Japan, August 24-27, 2004
GEOSYSTEMS, L.P.
Revisions to FHWA Implementation Manual
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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
6th International Workshop on Micropiles
Tokyo, Japan, August 24-27, 2004
GEOSYSTEMS, L.P.
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
6th International Workshop on Micropiles
Tokyo, Japan, August 24-27, 2004
GEOSYSTEMS, L.P.
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
6th International Workshop on Micropiles
Tokyo, Japan, August 24-27, 2004
GEOSYSTEMS, L.P.
Revisions to Course Curriculum

Editorial revisions to Instructor’s Guide,
Participant’s Workbook, and PowerPoint
slides (visual aids) to adhere to NHI
requirements
6th International Workshop on Micropiles
Tokyo, Japan, August 24-27, 2004
GEOSYSTEMS, L.P.

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