Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The Quest for Quality in Deep Foundations
The natural desire to improve the way we design and build deep foundations provides a fundamental motive for achieving excellence and high quality. Unfortunately, perceived high cost and the lack of rewards or incentives to make the effort that quality work demands, often leads us to complacency and mediocrity. This complacency can result in substantial reductions in bored pile capacity that dwarf the improvements derived from good quality engineering design. Examples from case histories illustrate how seemingly minor factors can cause capacity reductions of 80% or more. Faced with the daunting risks and uncertainties associated with deep foundations many engineers fall back on code-value engineering and from there to unnecessarily expensive foundations. A review of the impact of shaft diameter on measured side shear resistances leads to cautionary advice about how relying too much on intuition can affect the quality of our analytical work. The engineer and the contractor do have several options for improving and maintaining quality including but not limited to — better assessment of the high cost of risk and uncertainty, changing the low-bid approach to awarding foundation contracts, including a special bid item to encompass all of the QA/QC work on a project and generally making a greater effort to focus on the value that high quality brings to any deep foundation project.
The Quest for Quality in Deep Foundations
The natural desire to improve the way we design and build deep foundations provides a fundamental motive for achieving excellence and high quality. Unfortunately, perceived high cost and the lack of rewards or incentives to make the effort that quality work demands, often leads us to complacency and mediocrity. This complacency can result in substantial reductions in bored pile capacity that dwarf the improvements derived from good quality engineering design. Examples from case histories illustrate how seemingly minor factors can cause capacity reductions of 80% or more. Faced with the daunting risks and uncertainties associated with deep foundations many engineers fall back on code-value engineering and from there to unnecessarily expensive foundations. A review of the impact of shaft diameter on measured side shear resistances leads to cautionary advice about how relying too much on intuition can affect the quality of our analytical work. The engineer and the contractor do have several options for improving and maintaining quality including but not limited to — better assessment of the high cost of risk and uncertainty, changing the low-bid approach to awarding foundation contracts, including a special bid item to encompass all of the QA/QC work on a project and generally making a greater effort to focus on the value that high quality brings to any deep foundation project.
The Quest for Quality in Deep Foundations
Hayes, John. A. (Jack) (Autor:in)
Symposium Honoring Dr. John H. Schmertmann for His Contributions to Civil Engineering at Research to Practice in Geotechnical Engineering Congress 2008 ; 2008 ; New Orleans, Louisiana, United States
07.03.2008
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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