Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Pile Driving Formulas Revisited
Energy formulas have historically been used to estimate capacity for driven piles. Some engineers still rely on them today and researchers attempt to refine the safety factors or resistance factors to allow a more economic result. However, energy formulas make broad assumptions about “average hammer performance” that cannot always be properly accounted for during installation and thus leave themselves open to gross inaccuracies on any “individual project”, and therefore significant risk. Additionally, since common energy formulas do not model the driving system or pile or soil, observing hammer stroke and blow count is not sufficient to guarantee a specific capacity has been achieved on an individual project. It has been well documented by measurements that supposedly similarly rated hammers can transfer significantly different energies to the pile. Using the wave equation analysis to model these vastly different hammer system efficiencies, the resulting variance on calculated capacity from commonly used energy formulas is investigated and presented. Set-up assumptions contribute to further inaccuracies.
Pile Driving Formulas Revisited
Energy formulas have historically been used to estimate capacity for driven piles. Some engineers still rely on them today and researchers attempt to refine the safety factors or resistance factors to allow a more economic result. However, energy formulas make broad assumptions about “average hammer performance” that cannot always be properly accounted for during installation and thus leave themselves open to gross inaccuracies on any “individual project”, and therefore significant risk. Additionally, since common energy formulas do not model the driving system or pile or soil, observing hammer stroke and blow count is not sufficient to guarantee a specific capacity has been achieved on an individual project. It has been well documented by measurements that supposedly similarly rated hammers can transfer significantly different energies to the pile. Using the wave equation analysis to model these vastly different hammer system efficiencies, the resulting variance on calculated capacity from commonly used energy formulas is investigated and presented. Set-up assumptions contribute to further inaccuracies.
Pile Driving Formulas Revisited
Allin, Ryan (Autor:in) / Likins, Garland (Autor:in) / Honeycutt, Jon (Autor:in)
IFCEE 2015 ; 2015 ; San Antonio, Texas
IFCEE 2015 ; 1052-1063
17.03.2015
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
PILE DRIVING FORMULAS REVISITED
| British Library Conference Proceedings | 2015
Engineering Index Backfile | 1899
Engineering Index Backfile | 1941
| Engineering Index Backfile | 1940
| Engineering Index Backfile | 1924