6 th international workshop on micropiles tokyo, japan, august 24-27, 2004 development of adsc-fhwa...

6th International Workshop on MicropilesTokyo, Japan, August 24-27, 2004 GEOSYSTEMS, L.P.

Development of ADSC-FHWA Micropile Development of ADSC-FHWA Micropile Teaching Module into NHI CourseTeaching Module into NHI Course

Dr. Donald A. BruceDr. Donald A. Bruce


Contract awarded to ADSC by FHWA in 2002.Contract awarded to ADSC by FHWA in 2002. Course developed by Geosystems, geotechnica, Course developed by Geosystems, geotechnica,

and Schnabel Engineering under direction of and Schnabel Engineering under direction of IWM member Barry Siel (FHWA).IWM member Barry Siel (FHWA).

Based on FHWA Implementation Manual (DBM).Based on FHWA Implementation Manual (DBM). DeliverablesDeliverables

– Participant’s WorkbookParticipant’s Workbook– Instructor’s GuideInstructor’s Guide– ““Walk Through” (FHWA in D.C.)Walk Through” (FHWA in D.C.)– Demonstration (WA State DOT)Demonstration (WA State DOT)– Course now transferred to NHICourse now transferred to NHI

Ground Improvement Technology – Ground Improvement Technology – Micropiles: Original ADSC-FHWA Short CourseMicropiles: Original ADSC-FHWA Short Course


Update of FHWA course to NHI CourseUpdate of FHWA course to NHI Course

FHWA awarded contract to Ryan R. Berg & FHWA awarded contract to Ryan R. Berg & Associates in 2004Associates in 2004

Work involves updating original course to adhere Work involves updating original course to adhere to National Highway Institute requirementsto National Highway Institute requirements

Technical consultants included:Technical consultants included:– Dr. P. Sabatini, Lead Revision AuthorDr. P. Sabatini, Lead Revision Author– ADSC Micropile Committee as Technical advisors ADSC Micropile Committee as Technical advisors

(including IWM members T. Armour, D. Bruce, A. (including IWM members T. Armour, D. Bruce, A. Cadden, T. Richards, J. Wolosick)Cadden, T. Richards, J. Wolosick)

– Adult Education specialistAdult Education specialist– Peer reviewers as requiredPeer reviewers as required


Technical scope of work includes:Technical scope of work includes:– Updating and revising FHWA Micropile Updating and revising FHWA Micropile

Implementation Manual (originally developed Implementation Manual (originally developed by DBM)by DBM)

– Revising course curriculum materialsRevising course curriculum materials Instructor’s GuideInstructor’s Guide Participant’s WorkbookParticipant’s Workbook Visual AidsVisual Aids

– Deliver course walk-through at NHI officeDeliver course walk-through at NHI office– Deliver 2-day pilot presentationDeliver 2-day pilot presentation– Deliver regular 2-day course presentationsDeliver regular 2-day course presentations

Update of ADSC-FHWA Course to NHI CourseUpdate of ADSC-FHWA Course to NHI Course


Contents of the CourseContents of the Course

Lesson 1: Introduction (45 mins)Lesson 1: Introduction (45 mins) Lesson 2: Definitions, Background, and Lesson 2: Definitions, Background, and

Classification (Chapters 1 and 2 of Manual) (30 Classification (Chapters 1 and 2 of Manual) (30 mins)mins)

Lesson 3 – Applicability and ApplicationsLesson 3 – Applicability and ApplicationsChapter 3 of Manual) (45 mins)Chapter 3 of Manual) (45 mins)

Lesson 4 – Construction Techniques and Materials Lesson 4 – Construction Techniques and Materials (Chapter 4 of Manual) (60 mins)(Chapter 4 of Manual) (60 mins)


Lesson 5 – Design Basics – Structural Lesson 5 – Design Basics – Structural Support (150 mins)Support (150 mins)

Lesson 6 – Design for Slope Stabilization Lesson 6 – Design for Slope Stabilization and Earth Retention (30 mins)and Earth Retention (30 mins)

Lesson 7 – Pile Load Testing (Chapter 7 of Lesson 7 – Pile Load Testing (Chapter 7 of Manual) (45 mins)Manual) (45 mins)

Lesson 8 – Construction Inspection – Lesson 8 – Construction Inspection – Quality Control (Chapter 8 of Manual) (30 Quality Control (Chapter 8 of Manual) (30 mins)mins)

Contents of the Course (continued)Contents of the Course (continued)


Lesson 9 – Contracting Method (Chapter 9 Lesson 9 – Contracting Method (Chapter 9 of Manual) (20 mins)of Manual) (20 mins)

Lesson 10 – Feasibility and Cost Data Lesson 10 – Feasibility and Cost Data (Chapter 10 of Manual) (20 mins)(Chapter 10 of Manual) (20 mins)

Lesson 11 – Review of Ongoing Research Lesson 11 – Review of Ongoing Research (20 mins)(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)Contents of the Course (continued)


Revisions to FHWA Implementation ManualRevisions to FHWA Implementation Manual

Inclusion of information as appropriate from Inclusion of information as appropriate from FOREVER, AASHTO ASD specifications, FOREVER, AASHTO ASD specifications, AASHTO LRFD specifications, GEC No. 4 AASHTO LRFD specifications, GEC No. 4 (Anchored structures), and GEC No. 7 (Soil (Anchored structures), and GEC No. 7 (Soil nail walls)nail walls)

Update manual graphicsUpdate manual graphics Inclusion of relevant applications of Inclusion of relevant applications of

micropiles from recent case histories micropiles from recent case histories Update load testing data forms and Update load testing data forms and

micropile inspection formsmicropile inspection forms



Major revisions to Chapter 5 (Design Major revisions to Chapter 5 (Design Basics – Structural Support Basics – Structural Support – Strength and serviceability limit state Strength and serviceability limit state

conditions of single and groups of micropiles in conditions of single and groups of micropiles in compression, tension, and combined axial load compression, tension, and combined axial load and bendingand bending

– Evaluation of lateral capacity of micropiles Evaluation of lateral capacity of micropiles under seismic loadingunder seismic loading

– Effects of liquefaction on lateral capacity and Effects of liquefaction on lateral capacity and downdrag forcesdowndrag forces

– Design of appropriate corrosion protection Design of appropriate corrosion protection measuresmeasures



Major revisions to Chapter 5 (Design Major revisions to Chapter 5 (Design Basics – Structural Support (continued)Basics – Structural Support (continued)– Design methods for inclined micropilesDesign methods for inclined micropiles– Updated safety factors based on number of Updated safety factors based on number of

load tests performedload tests performed– Description of failure mechanisms Description of failure mechanisms – Background on selection of k-values for Background on selection of k-values for

buckling analyses and calculations for pile buckling analyses and calculations for pile group centroids and moments of inertiagroup centroids and moments of inertia



Major revisions to Chapter 6 (Design for Major revisions to Chapter 6 (Design for Slope Stabilization and Earth Retention)Slope Stabilization and Earth Retention)– Re-present Chapter 6 material in a manner Re-present Chapter 6 material in a manner

stronger than a stronger than a design concept design concept without without endorsing a specific design methodologyendorsing a specific design methodology

– Revision and update of figuresRevision and update of figures– Develop Case 1 non-reticulated micropiles Develop Case 1 non-reticulated micropiles

with a concrete cap beam as a “structural with a concrete cap beam as a “structural frame”frame”

– Include section on economics of micropiles Include section on economics of micropiles for slope stabilizationfor slope stabilization



Revisions to Chapter 7 (Pile Load Testing)Revisions to Chapter 7 (Pile Load Testing)– Provide specific guidance on number of load Provide specific guidance on number of load

tests to be performedtests to be performed– Add recommendations on load testing Add recommendations on load testing

procedures and interpretation of results procedures and interpretation of results consistent with other deep foundation load testsconsistent with other deep foundation load tests

– Discuss integrity testing and Statnamic testingDiscuss integrity testing and Statnamic testing– Provide sequences for verification, proof, and Provide sequences for verification, proof, and

creep testscreep tests– Provide appropriate acceptance criteriaProvide appropriate acceptance criteria


Revisions to Course CurriculumRevisions to Course Curriculum

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

6 th international workshop on micropiles tokyo, japan, august 24-27, 2004 development of adsc-fhwa...

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