A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Long Piles in Thick Lacustrine and Deltaic Deposits: Two Bridge Foundation Case Histories
Two recent bridge projects in British Columbia highlight the importance of having well-instrumented pile loading tests as part of pile foundation design. First case is the 1.5 km long, five-lane W.R. Bennett Bridge in the challenging Okanagan Lake soil profile with soft and loose to medium dense silts and silty sands to depths over 100 m. Five 610-mm diameter open- and closed-toe test piles were driven to 45 m depth. Pile dynamics tests were performed for all five test piles and a static loading test was carried out on the center pile, driven closed-toe. The importance of considering residual load in the test interpretation is illustrated. Second case is the 2.6 km long (main bridge and approaches) six-lane, cable-stayed Golden Ears Bridge over the Fraser River delta. Soils consisted of thick, potentially liquefiable sands, overlying near-normally consolidated soft to stiff clayey silts and silty clays to over 120 m depth. The south approach and main span piers are founded on 2.5 m diameter bored piles of up to 85 m length. Four loading tests were carried out for this project. One of the tests, a 74 m deep 2.5 m diameter pile loaded with bi-directional O-cells is described and the test results, their interpretation, and general foundation design methods and considerations are presented.
Long Piles in Thick Lacustrine and Deltaic Deposits: Two Bridge Foundation Case Histories
Two recent bridge projects in British Columbia highlight the importance of having well-instrumented pile loading tests as part of pile foundation design. First case is the 1.5 km long, five-lane W.R. Bennett Bridge in the challenging Okanagan Lake soil profile with soft and loose to medium dense silts and silty sands to depths over 100 m. Five 610-mm diameter open- and closed-toe test piles were driven to 45 m depth. Pile dynamics tests were performed for all five test piles and a static loading test was carried out on the center pile, driven closed-toe. The importance of considering residual load in the test interpretation is illustrated. Second case is the 2.6 km long (main bridge and approaches) six-lane, cable-stayed Golden Ears Bridge over the Fraser River delta. Soils consisted of thick, potentially liquefiable sands, overlying near-normally consolidated soft to stiff clayey silts and silty clays to over 120 m depth. The south approach and main span piers are founded on 2.5 m diameter bored piles of up to 85 m length. Four loading tests were carried out for this project. One of the tests, a 74 m deep 2.5 m diameter pile loaded with bi-directional O-cells is described and the test results, their interpretation, and general foundation design methods and considerations are presented.
Long Piles in Thick Lacustrine and Deltaic Deposits: Two Bridge Foundation Case Histories
Naesgaard, Ernest (author) / Amini, Ali (author) / Uthayakumar, Uthaya M. (author) / Fellenius, Bengt H. (author)
GeoCongress 2012 ; 2012 ; Oakland, California, United States
Full-Scale Testing and Foundation Design ; 404-421
2012-03-29
Conference paper
Electronic Resource
English
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