A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Pile Installation Demonstration Project for the New East Span of the San Francisco-Oakland Bay Bridge
This case study presents results from the Pile Installation Demonstration Project (PIDP) that was conducted as part of the San Francisco-Oakland Bay Bridge (SFOBB) East Span Seismic Safety Project. The PIDP was conducted to better understand pile handling, marine construction operations, pile driving behavior, and pile setup associated with installing large-diameter, steel pipe piles into San Francisco Bay sediments. Three full-scale piles (one vertical and two on a 1:6 batter) were driven in the area between the existing Bay Bridge and the planned replacement bridge alignment. The expected ultimate axial compression capacity was on the order of 120 meganewtons. Two large hydraulic hammers (Menck MHU 500T and MHU 1700) were used. These hammers drove the three indicator piles to the specified tip elevations at acceptable blow counts (typically less than 50 blows per quarter meter) and without pile damage. Dynamic monitoring data collected during initial driving and subsequent restrikes were used as input for CAPWAP (Case Pile Wave Analysis Program) analyses. The results of those analyses were used to estimate skin friction along the pile length, and the soil-pile setup with time. As expected, soil resistances to driving were significantly less than the estimated ultimate pile capacities due to remolding of the soil and generation of excess pore pressure during continuous driving in the primarily clay soils. The procedures used to predict soil resistance to driving and blow counts were validated by the pile dynamic monitoring data and subsequent CAPWAP analyses. The estimated setup rates were also compared with results of procedures currently available in the literature for predicting the pile setup rate.
Pile Installation Demonstration Project for the New East Span of the San Francisco-Oakland Bay Bridge
This case study presents results from the Pile Installation Demonstration Project (PIDP) that was conducted as part of the San Francisco-Oakland Bay Bridge (SFOBB) East Span Seismic Safety Project. The PIDP was conducted to better understand pile handling, marine construction operations, pile driving behavior, and pile setup associated with installing large-diameter, steel pipe piles into San Francisco Bay sediments. Three full-scale piles (one vertical and two on a 1:6 batter) were driven in the area between the existing Bay Bridge and the planned replacement bridge alignment. The expected ultimate axial compression capacity was on the order of 120 meganewtons. Two large hydraulic hammers (Menck MHU 500T and MHU 1700) were used. These hammers drove the three indicator piles to the specified tip elevations at acceptable blow counts (typically less than 50 blows per quarter meter) and without pile damage. Dynamic monitoring data collected during initial driving and subsequent restrikes were used as input for CAPWAP (Case Pile Wave Analysis Program) analyses. The results of those analyses were used to estimate skin friction along the pile length, and the soil-pile setup with time. As expected, soil resistances to driving were significantly less than the estimated ultimate pile capacities due to remolding of the soil and generation of excess pore pressure during continuous driving in the primarily clay soils. The procedures used to predict soil resistance to driving and blow counts were validated by the pile dynamic monitoring data and subsequent CAPWAP analyses. The estimated setup rates were also compared with results of procedures currently available in the literature for predicting the pile setup rate.
Pile Installation Demonstration Project for the New East Span of the San Francisco-Oakland Bay Bridge
Howard, Jr., Roger (author) / Dover, Anthony R. (author) / Stevens, Robert F. (author) / Mohan, Saba (author)
International Deep Foundations Congress 2002 ; 2002 ; Orlando, Florida, United States
Deep Foundations 2002 ; 158-172
2002-02-01
Conference paper
Electronic Resource
English
| British Library Conference Proceedings | 2002
| British Library Conference Proceedings | 2002
San Francisco-Oakland Bay Bridge, East Span Seismic Safety Project
| British Library Conference Proceedings | 1999
San Francisco-Oakland Bay Bridge, East Span Seismic Safety
| Online Contents | 2003
| British Library Conference Proceedings | 2002