Basics of Design of Piled Foundations (1.4 CEUs)
27 January 2011
28 January 2011
Best Western Village Park Inn
1804 Crowchild Trail NW
Note: Please do not book travel and accommodation until you receive course confirmation.
The primary intent of the course is to provide information that will enable the attendees to recognize that deep foundation design is a good deal more than finding some value of capacity, and that the primary issue is load distribution and settlement. The course aims to show what data one must pull together and present processes of analysis and calculations necessary for a design of a specific project.
The presentation includes both broad generalities and in-depth details. Aspects of how to install instrumentation, perform a test, and analyze the test data are addressed. Settlement analysis is of vital importance to the design of piled foundations and the course addresses the principles of settlement analysis, and some of the mechanics of actually calculating settlement. Some details are included of construction aspects as well as aspects of Limit States Design, LSD (Ultimate Limit States, ULS, and Serviceability Limit States, SLS, by Canadian terminology and Load and Resistance Factor Design, LRFD, by US terminology).
The target audience for this course includes geotechnical engineers, bridge designers, resident engineers and consultant review specialists. The course embraces both construction and design, participants are expected to have passed an undergraduate course in soil mechanics and/or have successfully completed the Global Innovative Campus (GIC) course on Soils Engineering for Practical Applications. This course is intended for designers, and field or laboratory personnel with a background in engineering.
This course is suitable for attendance by entry-level and experienced engineers and advanced-level technicians. In addition, structural, design, and construction engineers, project management and construction engineers in charge of pile-driving construction are encouraged to attend.
College and university faculty; consultant engineers and geologists who are involved in pile analysis, design and construction. The course will be most beneficial to geotechnical engineers, engineering geologists, foundation designers, project engineers, and highway/bridge engineers who are involved in the design and construction of foundations for surface transportation projects.
Program Outline (1.4 CEUs / 14 PDHs)
Presented by: Bengt H. Fellenius, Dr.Tech, P.Eng., M.ASCE., M.CGS
08:30h Brief Background to Basic Principles Applicable to Piled Foundations
Soil classification, Effective stress, Stress distribution, Compressibility, Settlement, Shear strength, Bearing capacity; Site exploration methods (with emphasis on the CPT).
10:00h Coffee Break
10:20h Analysis of Load Transfer and Capacity of Piles
Bearing capacity and load-transfer by beta, alpha, and lambda methods; Set-up and relaxation; Capacity from CPT and CPTU and other in-situ methods.
13:00h The Static Loading Test: Performance and Determining Capacity
Methods of testing and basic interpretation of the results.
13:30h Pile Instrumentation for Load and Resistance Distribution
Comments and examples on pile instrumentation and factors influencing recorded data. Determining pile elastic modulus. The importance of residual load and how to include its effect in the analysis.
14.30h Coffee Break
14.50h The Bi-directional Test — the O-cell Test
Principles of the bi-directional test (the O-cell test) and how to analyze the results. Examples of test showing lessons learnt for load and resistance distribution, pile shaft and pile toe response, residual load and capacity extrapolations.
16:30h Case Histories of Pile Analysis
Examples of full-scale tests with analyses and applications for design.
17:00h Questions and Discussions
08.30h Piles and Pile Groups — Long-Term Behavior and how we know what we know
Important case histories presenting studies that demonstrated the actual long-term response of piles to load and observed settlement of piles.
10:00h Coffee Break
10:20h Soil Improvement Using Wick Drains with Reference to Piled Foundations
Principles of radial consolidation and applications of wick drains to improve settlement conditions and mitigate lateral flow.
11:40h Precast Prestressed Concrete Piling
Ordinary precast and prestressed piles; cylinder piles; splicing of piles; pile shoes and rock shoes.
13:00h Unified Design of Piles and Pile Groups
Design for capacity (choice of factor of safety, and rules of LRFD and Limit States Design); Design for structural strength (including drag load); Settlement of single piles and pile groups due to load directly on the piles and due to influence from adjacent activity (downdrag); Aspects of Canadian, US and European Codes and, guidelines and standards with examples; Choice of factor of safety, and rules of LRFD and Limit States Design. Axial design for liquefaction. Design of piled rafts and piled pads (“inclusion piling”).
15.00h Coffee Break
15.20h Pile Dynamics in Engineering Practice and the Statnamic Test
Examples from dynamic testing of piles: Hammer performance; Pile stresses, Pile integrity, Comparison and comments on capacity determined in a static loading test versus in a CAPWAP analysis. Use of pile dynamics in the design and construction of actual projects. The Statnamic test. Vibrations due to pile driving.
17:00h Questions and Discussions
Upon completion of the course, participants will be able to:
- Implement a systematic plan for the design and construction of pile foundations
- Select appropriate subsurface exploration procedures and laboratory tests to provide design soil parameters for pile foundation design
- Choose the appropriate pile type in a given soil profile based on the advantages and disadvantages of common pile types
- Use appropriate methods of pile foundation design in application subsurface conditions
- Calculate single and group capacities of piles to resist compression, tension, and lateral loads
- Use time-dependent soil strength changes in pile foundation design and construction control
- Identify the project influence and significance of pile driveability, pile refusal, and minimum and estimated pile toe elevations
- Calculate allowable design and allowable driving stresses for common pile types
- Explain the key differences between allowable stress design and load and resistance factor design methods
- Determine the primary consolidation settlement of piled foundations on cohesive soils
- Determine the settlement of piled foundations on cohesionless soils
- Identify the format and minimum content in an adequate foundation report for driven pile foundations
- Use dynamic formulas, wave equation analyses, dynamic pile testing and static load testing correctly and effectively
- Explain appropriate methods of pile installation
Bengt H. Fellenius is a professional engineer specializing in foundation design and studies by participation in project teams, special investigations, instrumented field tests, etc. Dr. Fellenius graduated from the Royal Institute of Technology in Stockholm, Sweden in 1962 and moved to North America in 1972. He was Professor of Civil Engineering at the University of Ottawa from 1979 through 1996 and is an internationally recognized authority in the field of soil mechanics and foundation engineering, and, in particular, in pile foundations. He is the author of more than 250 technical journal and conference papers, articles, books, and book chapters. and has gained a wealth of practical experience during more than 40 years of work at home and abroad through a variety of assignments that encompass foundation design for water and sewage treatment plants, industrial plants, bridges, and highway projects, marine structures, and urban area development.
Dr. Fellenius is and has been an active participant in many national and international professional societies and research associations, and in Canadian and US Codes and Standards Development. For example, Member of the subcommittee for the American Society for Testing and Materials D4945 Standard for High-Strain Dynamic Testing of Piles; Chairman of the Canadian Geotechnical Society Technical Committee on Foundations writing the Canadian Foundation Engineering Manual Second Edition; Member of the Ministry of Transportation Committee for the Development of the 1983 and 1992 Ontario Bridge Design Code; Author of three Public Works Canada publications: Marine Division Master Specifications for Piling, Pile Design Guidelines, and Hammer Selection Guide; Past Overseas Correspondent Member to the Geotechnical Engineering Advisory Panel of the Institution of Civil Engineers, ICE (London); and Past Member of Editorial Board for the ASCE Geotechnical Engineering Journal. He has given lectures and courses to several universities, professional groups, and national and international conferences throughout Europe, America, and south-east Asia.
A student registered full-time at a university will be accepted at a 50% discounted fee on providing a letter from his/her professor confirming a full-time student status.
For more than one registrant from the same organization, a 10% discount applies to each registration.
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serve as informative references.
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Basics of Design of Piled Foundations (1.4 CEUs)
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