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Lateral Load Test Results on Drilled Shafts in Marl at Jacksonville, Florida
The replacement of the existing I-95 Fuller Warren Bridge over the St. Johns River in Jacksonville, Florida, required the installation of more than 750 drilled shafts founded in limestone and marl for support of the new 2,304-m (7,559-ft) long bridge. This project included a lateral load test performed on two instrumented 1,830-mm (72-inch) diameter drilled shafts founded in marl and located in the river in water approximately 15 m (50 ft) deep. The shafts were installed with a center-to-center spacing of 7.13 m (23.4 ft), and were loaded by jacking the shafts apart above the water level. The two test shafts were installed with isolation casing to eliminate lateral soil resistance above the design scour elevation. The paper describes the design of the drilled shaft foundations for lateral loading, including the design p-y curves developed from the site investigations. The paper also discusses the installation of the test shafts and the instrumentation used for monitoring the load test. The results of the lateral load test are presented and discussed, and compared with predicted shaft performance. Among the issues discussed is the effect of concrete cracking on the flexural rigidity of the shaft.
Lateral Load Test Results on Drilled Shafts in Marl at Jacksonville, Florida
The replacement of the existing I-95 Fuller Warren Bridge over the St. Johns River in Jacksonville, Florida, required the installation of more than 750 drilled shafts founded in limestone and marl for support of the new 2,304-m (7,559-ft) long bridge. This project included a lateral load test performed on two instrumented 1,830-mm (72-inch) diameter drilled shafts founded in marl and located in the river in water approximately 15 m (50 ft) deep. The shafts were installed with a center-to-center spacing of 7.13 m (23.4 ft), and were loaded by jacking the shafts apart above the water level. The two test shafts were installed with isolation casing to eliminate lateral soil resistance above the design scour elevation. The paper describes the design of the drilled shaft foundations for lateral loading, including the design p-y curves developed from the site investigations. The paper also discusses the installation of the test shafts and the instrumentation used for monitoring the load test. The results of the lateral load test are presented and discussed, and compared with predicted shaft performance. Among the issues discussed is the effect of concrete cracking on the flexural rigidity of the shaft.
Lateral Load Test Results on Drilled Shafts in Marl at Jacksonville, Florida
Castelli, Raymond J. (author) / Fan, Ke (author)
International Deep Foundations Congress 2002 ; 2002 ; Orlando, Florida, United States
Deep Foundations 2002 ; 824-835
2002-02-01
Conference paper
Electronic Resource
English
Lateral Load Test Results on Drilled Shafts in Marl at Jacksonville, Florida
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