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原文传递 Calibration of Region-Specific Gates Pile Driving Formula for LRFD. Final Report 561. Tech Summary.

题名：	Calibration of Region-Specific Gates Pile Driving Formula for LRFD. Final Report 561. Tech Summary.
作者：	RCWE, E. A.; Rix, G. J.; Burnworth, G. H.; Jung, J. W.
关键词：	Pile driving, Lrfd(Load and resistance factor design), Modified gates, Pile Drive Shot, Gates formula, Computer data base, Soil conditions, Resistance factors, LADOTD(Louisiana Department of Transportation and Development)
摘要：	The Louisiana Department of Transportation and Development (DOTD) uses a variation of the Federal Highway Administration (FHWA) Gates formula, hereinafter referred to as the DOTD pile driving formula, to verify the long term ultimate pile capacity with blow counts obtained during end-of-initial-driving (EOID) per the 2006 Louisiana Standard Specifi cations for Roads and Bridges, Section 804.10. The DOTD pile driving formula is typically used on smaller projects where static load tests and dynamic monitoring are not practical. The resistance factor for load and resistance factor design (LRFD) specifi ed by the current American Association of State Highway and Transportation Offi cials (AASHTO) design guide for the FHWA Gates Formula is 0.40. However, DOTD uses a resistance factor equal to 0.50 for designs using static equilibrium methods. The goal of this study is to develop pile driving formulas using a regional pile load test database and calibrate the LRFD resistance factors that have the same reliability index and probability of failure that is being used in static equilibrium methods. The objectives of this project are to evaluate and, if necessary, develop new pile driving formulas based on the generic Gates formula using a regional Louisiana database with pile types and local soil conditions encountered in Louisiana. LRFD resistance factors associated with each pile driving formula will be calibrated for values of the reliability index and probability of failure appropriate for redundant foundation systems. Another important objective of this research is to geographically organize historical pile load testing records for use in this study as well as for future enhancement of DOTD’s geotechnical information database.
总页数：	RCWE, E. A.; Rix, G. J.; Burnworth, G. H.; Jung, J. W.
报告类型：	科技报告