Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effects of Gravels, Cobbles, and Boulders on Drilled Shaft Capacity Cypress Avenue Bridge, Redding, California
Drilled shaft capacity computations are routinely performed by geotechnical professionals using the Alpha and Beta methods outlined in the Federal Highway Administration (FHWA) Publication FHWA-IF-99-025. For cohesionless intermediate geomaterials, the analysis relies heavily upon the Standard Penetration Test sampler blowcounts obtained from exploratory borings. In the presence of alluvial gravel, cobble and boulder deposits, such evaluation cannot be reliably performed. This paper presents information obtained from Osterberg Cell load testing of 2.5 meter (98-inch) diameter shafts advanced using the casing oscillator method at the Cypress Avenue Bridge over the Sacramento River in Redding, California. The relationships between side shear transfer, end bearing, and settlement in cobble and boulder rich deposits with various matrix materials and degrees of weathering are demonstrated. The effects of particle dilation in the development of shaft side resistance and zones of higher stress concentration are also discussed. The results of instrumented pile load testing are compared with the results of drilled shaft capacity estimates made using the FHWA methods in an effort to better correlate field performance with analytical methods.
Effects of Gravels, Cobbles, and Boulders on Drilled Shaft Capacity Cypress Avenue Bridge, Redding, California
Drilled shaft capacity computations are routinely performed by geotechnical professionals using the Alpha and Beta methods outlined in the Federal Highway Administration (FHWA) Publication FHWA-IF-99-025. For cohesionless intermediate geomaterials, the analysis relies heavily upon the Standard Penetration Test sampler blowcounts obtained from exploratory borings. In the presence of alluvial gravel, cobble and boulder deposits, such evaluation cannot be reliably performed. This paper presents information obtained from Osterberg Cell load testing of 2.5 meter (98-inch) diameter shafts advanced using the casing oscillator method at the Cypress Avenue Bridge over the Sacramento River in Redding, California. The relationships between side shear transfer, end bearing, and settlement in cobble and boulder rich deposits with various matrix materials and degrees of weathering are demonstrated. The effects of particle dilation in the development of shaft side resistance and zones of higher stress concentration are also discussed. The results of instrumented pile load testing are compared with the results of drilled shaft capacity estimates made using the FHWA methods in an effort to better correlate field performance with analytical methods.
Effects of Gravels, Cobbles, and Boulders on Drilled Shaft Capacity Cypress Avenue Bridge, Redding, California
Sorensen, Kenneth (Autor:in)
Art of Foundation Engineering Practice Congress 2010 ; 2010 ; West Palm Beach, Florida, United States
Art of Foundation Engineering Practice ; 620-634
18.02.2010
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Microtunneling in Gravel, Cobbles, and Boulders
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Evaluation of Lateral Interpretation Criteria for Drilled Shaft Capacity in Gravels
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Evaluation of Lateral Interpretation Criteria for Drilled Shaft Capacity in Gravels
| British Library Online Contents | 2013
Evaluation of Lateral Interpretation Criteria for Drilled Shaft Capacity in Gravels
| Online Contents | 2013
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