Simulated Pile Load-Movement Incorporating Anticipated Soil Set-Up
Publication: Geotechnical Engineering for Transportation Projects
Abstract
Dynamic pile testing and related data analysis methods are routinely used to measure soil resistance effects, estimate static pile load bearing capacity, and predict pile load-movement relationship. Analysis results represent conditions at the time of testing. For piles driven into soils with beneficial time-dependent characteristics, the capacity increases with time following initial driving due to favorable geotechnical effects. In practice, construction scheduling constraints often restrict the evaluation of "long-term" pile capacity and limit the verification testing to a short period following initial driving. This paper presents a method for predicting future pile load-movement relationship based on end of driving and short-term restrike dynamic testing results. A case study is presented where field dynamic tests were performed with a Pile Driving Analyzer® (PDA) and CAPWAP® computer analysis during initial driving and restrike eleven days later. The CAPWAP method was also used to predict the pile load-movement graph expected at seventeen days after end of initial driving for comparison with results from a full-scale conventional static loading test to be independently performed at that time. Good correlation was obtained between the dynamically predicted and full-scale static load test results based on the proposed method.
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Copyright
© 2004 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Continuum mechanics
- Dynamic loads
- Dynamic tests
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Field tests
- Foundation design
- Foundations
- Geomechanics
- Geotechnical engineering
- Laboratory tests
- Load bearing capacity
- Load tests
- Pile foundations
- Pile tests
- Soil analysis
- Soil mechanics
- Soil properties
- Solid mechanics
- Static loads
- Statics (mechanics)
- Structural dynamics
- Tests (by type)
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