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47th STGEC – Biloxi, MS – Nov. 10, 2016

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Presentation on theme: "47th STGEC – Biloxi, MS – Nov. 10, 2016"— Presentation transcript:

1 47th STGEC – Biloxi, MS – Nov. 10, 2016
iCAP Pile Testing Investigation of Signal Matching Software iCAP on Driven Piles in Alabama Eric Steward, Ph.D., P.E. Assistant Professor Department of Civil, Coastal, and Environmental Engineering University of South Alabama Ronald Jones Graduate Student

2 Verification of design during installation
47th STGEC – Biloxi, MS – Nov. 10, 2016 Pile Testing “A DRIVEN PILE IS A TESTED PILE!” Verification of design during installation Larger projects will install test piles at various locations Smaller projects will verify production piles during installation Software enhances the determination of pile resistance during driving and later University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

3 “A DRIVEN PILE IS A TESTED PILE!”
47th STGEC – Biloxi, MS – Nov. 10, 2016 Pile Testing “A DRIVEN PILE IS A TESTED PILE!” University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

4 “A DRIVEN PILE IS A TESTED PILE!”
47th STGEC – Biloxi, MS – Nov. 10, 2016 Pile Testing “A DRIVEN PILE IS A TESTED PILE!” University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

5 Dynamic Pile Testing Estimates static resistance
47th STGEC – Biloxi, MS – Nov. 10, 2016 Pile Testing Dynamic Pile Testing Estimates static resistance Estimates internal pile stresses Verifies pile integrity University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

6 PDA results: Case Method
47th STGEC – Biloxi, MS – Nov. 10, 2016 Pile Testing PDA results: Case Method Uses Case method equations Provides immediate pile resistances (RX7 Total Resistance) Assumed soil damping values (J) University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

7 Dynamic Pile Testing – Signal Matching Software
47th STGEC – Biloxi, MS – Nov. 10, 2016 Pile Testing Dynamic Pile Testing – Signal Matching Software CAPWAP® is an iterative process to develop soil/pile interaction model Provides accurate toe and shaft resistances Provides load/displacement and iteratively determine the damping factor (J) Claims to be as accurate as Static Load Testing Requires trained, experienced personnel Non-unique results Time-consuming University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

8 Dynamic Pile Testing – Signal Matching Software
47th STGEC – Biloxi, MS – Nov. 10, 2016 Pile Testing Dynamic Pile Testing – Signal Matching Software CAPWAP® is an iterative process to develop soil/pile interaction model Provides accurate toe and shaft resistances Provides load/displacement and iteratively determine the damping factor (J) Claims to be as accurate as Static Load Testing Requires trained, experienced personnel Non-unique results Time-consuming University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

9 Dynamic Pile Testing – Signal Matching Software
47th STGEC – Biloxi, MS – Nov. 10, 2016 Pile Testing Dynamic Pile Testing – Signal Matching Software iCAP® is an automatic Signal Matching Program within the PDA Provides accurate toe and shaft resistances Provides load/displacement and iteratively determine the damping factor (J) Claims to be as accurate as CAPWAP??? Requires trained, experienced personnel Non-unique results Time-consuming University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

10 Dynamic Pile Testing – Signal Matching Software
47th STGEC – Biloxi, MS – Nov. 10, 2016 Pile Testing Dynamic Pile Testing – Signal Matching Software iCAP® is an automatic Signal Matching Program within the PDA Provides accurate toe and shaft resistances Provides load/displacement and iteratively determine the damping factor (J) Claims to be as accurate as CAPWAP??? Requires trained, experienced personnel Performed by the PDA Operator Non-unique results Time-consuming University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

11 Dynamic Pile Testing – Signal Matching Software
47th STGEC – Biloxi, MS – Nov. 10, 2016 Pile Testing Dynamic Pile Testing – Signal Matching Software iCAP® is an automatic Signal Matching Program within the PDA Provides accurate toe and shaft resistances Provides load/displacement and iteratively determine the damping factor (J) Claims to be as accurate as CAPWAP??? Requires trained, experienced personnel Performed by the PDA Operator Non-unique results Program performs process, so one solution Time-consuming University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

12 Dynamic Pile Testing – Signal Matching Software
47th STGEC – Biloxi, MS – Nov. 10, 2016 Pile Testing Dynamic Pile Testing – Signal Matching Software iCAP® is an automatic Signal Matching Program within the PDA Provides accurate toe and shaft resistances Provides load/displacement and iteratively determine the damping factor (J) Claims to be as accurate as CAPWAP??? Requires trained, experienced personnel Performed by the PDA Operator Non-unique results Program performs process, so one solution Time-consuming Instantaneous results in the field University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

13 iCAP– Signal Matching Software
47th STGEC – Biloxi, MS – Nov. 10, 2016 Pile Testing iCAP– Signal Matching Software iCAP analysis requires high quality data: No clipping of signals Good proportionality Good agreement between acceleration traces Moderate bending No indicated pile damage - F. Rausche at PDI University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

14 AL DOT Research Objectives
47th STGEC – Biloxi, MS – Nov. 10, 2016 45th STGEC - Mobile, AL – Oct. 29, 2014 ALDOT Project AL DOT Research Objectives Develop a statewide database for pile test data Analyze and Evaluate pile setup in Alabama Develop resistance factors for design of piles in setup prone soils Provide recommendations to utilize setup in design of future pile projects throughout the state Provide information regarding LRFD resistance factors Implement preliminary soil testing regime for design University of South Alabama, Department of Civil Engineering University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

15 Pile Driving Test Data GIS Map
Type equation here. Data Collection Pile Driving Test Data GIS Map Collected all pile load tests from 2009 – 2014 PDA Data (27) 19 Clayey Sand All produced setup effects 8 Silt or silty sand 7 slightly relaxed

16 iCAP Data Accuracy 47th STGEC – Biloxi, MS – Nov. 10, 2016
45th STGEC - Mobile, AL – Oct. 29, 2014 Pile iCAP Analysis iCAP Data Accuracy University of South Alabama, Department of Civil Engineering University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

17 iCAP Data Accuracy 47th STGEC – Biloxi, MS – Nov. 10, 2016
45th STGEC - Mobile, AL – Oct. 29, 2014 Pile iCAP Analysis iCAP Data Accuracy University of South Alabama, Department of Civil Engineering University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

18 iCAP Data Accuracy 47th STGEC – Biloxi, MS – Nov. 10, 2016
45th STGEC - Mobile, AL – Oct. 29, 2014 Pile iCAP Analysis iCAP Data Accuracy University of South Alabama, Department of Civil Engineering University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

19 iCAP Data Accuracy 47th STGEC – Biloxi, MS – Nov. 10, 2016
45th STGEC - Mobile, AL – Oct. 29, 2014 Pile iCAP Analysis iCAP Data Accuracy University of South Alabama, Department of Civil Engineering University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

20 Project Location 47th STGEC – Biloxi, MS – Nov. 10, 2016
45th STGEC - Mobile, AL – Oct. 29, 2014 47th STGEC – Biloxi, MS – Nov. 10, 2016 Pile Tests in AL University of South Alabama, Department of Civil Engineering University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

21 Pile Setup Comparison Mobile River, AL
Type equation here. Pile Setup Comparison Mobile River, AL 10 HP 12 x 53 50 110 90 70 30 HP 14 x 117 PC 24” Sq. PC 36” Sq. Medium to Dense Sand Clay EOD SSR EOD Toe EOD Total 80 k 72 k 152 k* 112 k 44 k 156 k 241 k 323 k 564 k 617 k 222 k 839 k

22 Comparing iCAP Results with SLT
45th STGEC - Mobile, AL – Oct. 29, 2014 47th STGEC – Biloxi, MS – Nov. 10, 2016 Pile Testing Comparing iCAP Results with SLT ε = 9.9% ε = 5.7% ε = 4.7% University of South Alabama, Department of Civil Engineering University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

23 iCAP Testing Conclusions
47th STGEC – Biloxi, MS – Nov. 10, 2016 45th STGEC - Mobile, AL – Oct. 29, 2014 Pile iCAP Testing iCAP Testing Conclusions iCAP is a Signal Matching software Requires high quality data Acceptable for AASHTO Bridge Design Instant pile resistance results Comparison to CAPWAP is very good More data is always needed University of South Alabama, Department of Civil Engineering University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

24 Enhancing LRFD resistance factors
47th STGEC – Biloxi, MS – Nov. 10, 2016 45th STGEC - Mobile, AL – Oct. 29, 2014 Pile Research Current project evaluating the design process compared to static load tests Enhancing LRFD resistance factors Approved project to develop pile test database Develop regional LRFD resistance factors NTP expected any day University of South Alabama, Department of Civil Engineering University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

25 Questions Comments Suggestions
47th STGEC – Biloxi, MS – Nov. 10, 2016 45th STGEC - Mobile, AL – Oct. 29, 2014 Shelby Hall - USA Questions Comments Suggestions Thank you Alabama Department of Transportation University of South Alabama, Department of Civil Engineering University of South Alabama - Dept. of Civil, Coastal, and Enviro. Engineering

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