Ground Improvement Technology – Micropiles FHWA Short Course Dr. Donald A. Bruce

5th International Workshop on MicropilesSeattle, WA, September 24-27, 2003 GEOSYSTEMS, L.P.

Ground Improvement Technology – Ground Improvement Technology – MicropilesMicropilesFHWA Short CourseFHWA Short Course

Dr. Donald A. BruceDr. Donald A. Bruce


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

and Schnabel Engineering under direction of and Schnabel Engineering under direction of Barry Siel (FHWA).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: FHWA Short CourseMicropiles: FHWA Short Course


Contents of the CourseContents of the Course(1½ days of teaching)(1½ days of teaching)

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

(Chapters 1 and 2 of Manual) (30 mins)(Chapters 1 and 2 of Manual) (30 mins) Lesson 3 – Applicability and ApplicationsLesson 3 – Applicability and Applications

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

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


Objectives of Lesson 1Objectives of Lesson 1

Participants will gain insight to Participants will gain insight to the nature and structure of the the nature and structure of the course and an awareness of the course and an awareness of the organizations and participants organizations and participants

involvedinvolved


Contents of Lesson 1Contents of Lesson 1

1.11.1 Introduction of InstructorsIntroduction of Instructors1.21.2 Introduction of ParticipantsIntroduction of Participants1.31.3 Course Administrative issuesCourse Administrative issues1.41.4 Information about FHWAInformation about FHWA1.51.5 Information about ADSCInformation about ADSC1.61.6 Structure of this CourseStructure of this Course1.71.7 Micropile Questionnaire for ParticipantsMicropile Questionnaire for Participants1.81.8 Review of Team Exercise Review of Team Exercise 1.91.9 Presentation by Host StatePresentation by Host State


Structure of this Course (cont.)Structure of this Course (cont.)

1.6.21.6.2 Course MaterialsCourse Materials– Implementation Manual - Micropile Design and Implementation Manual - Micropile Design and

Construction GuidelinesConstruction Guidelines– Revised Chapter 6 of Implementation ManualRevised Chapter 6 of Implementation Manual – Copy of Instructor’s Visuals (Participant Copy of Instructor’s Visuals (Participant

Workbook)Workbook)– Team Exercise WorkbookTeam Exercise Workbook

1.6.31.6.3 Other MaterialsOther Materials– Course AgendaCourse Agenda– Micropile Prior Usage QuestionnaireMicropile Prior Usage Questionnaire– Course Evaluation FormCourse Evaluation Form


1.7 Micropile Questionnaire for 1.7 Micropile Questionnaire for ParticipantsParticipants

PurposePurpose: : To identify individual and To identify individual and collective collective experience and needs experience and needs

MethodMethod::1.1. Completed questionnaires will be Completed questionnaires will be

collected at the end of the first coffee collected at the end of the first coffee break and the results tabulated during break and the results tabulated during lunch break.lunch break.The tabulated results will be revisited at The tabulated results will be revisited at different points throughout the lessons different points throughout the lessons following lunch break.following lunch break.


1.8 Team Exercise1.8 Team Exercise

Handout (refer to Team Exercise Handout (refer to Team Exercise Workbook)Workbook)

Select TeamsSelect Teams Purpose of Exercise – apply all lessons Purpose of Exercise – apply all lessons

throughout workshopthroughout workshop Team work products for this exercise Team work products for this exercise

will be presented in Lesson 12 will be presented in Lesson 12 followed by an evaluation of the followed by an evaluation of the exercise exercise


1.9 Presentation by Host State1.9 Presentation by Host State

Experiences (good and bad)Experiences (good and bad)– GoodGood– BadBad

Lessons learned so farLessons learned so far Reliance on existing FHWA/AASHTO documentsReliance on existing FHWA/AASHTO documents Department attitude to useDepartment attitude to use Reasons forReasons for

– Growth in use?Growth in use?– Lack of use?Lack of use?

Main Departmental learning goals from this Main Departmental learning goals from this WorkshopWorkshop


Learning Objectives of Lesson 1Learning Objectives of Lesson 1

Gain insight to the nature and Gain insight to the nature and structure of the course and structure of the course and

an awareness of the an awareness of the organizations and organizations and

participants involvedparticipants involved


High capacity and surprisingly high stiffnessHigh capacity and surprisingly high stiffness Installation imparts minimal disturbance to Installation imparts minimal disturbance to

adjacent structures, soil and the environment adjacent structures, soil and the environment by noise and vibrationsby noise and vibrations

May be installed in access-restrictive May be installed in access-restrictive environmentsenvironments

May be installed in all soil and fill conditions May be installed in all soil and fill conditions types and ground conditions (e.g., boulders, types and ground conditions (e.g., boulders, fills, karst, variably weathered rock, high water fills, karst, variably weathered rock, high water table)table)

Advantages of MicropilesAdvantages of Micropiles


CASE 2 Micropile ArrangementsCASE 2 Micropile Arrangements

Documents

Ground Improvement Technology – Micropiles FHWA Short Course Dr. Donald A. Bruce