Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Load Transfer Mechanisms of Tip Post-Grouted Drilled Shafts in Sand
Post-Grouted Drilled Shafts (PGDS) are a deep foundation system in which grout is injected at high pressure through the tip after the drilled shaft has been installed. Available field load tests show significant load and stiffness improvements of PGDS due to tip pressure grouting. The improved ultimate load capacity and stiffness of PGDS compared to conventional drilled shafts are believed to be related to the pre-stressing effect which the tip post grouting has on the shaft side friction due to the generated upward movement. It also is related to the grout bulb formed at the PGDS tip. This grout bulb pre-compresses the soil beneath the tip as well as any disturbed material generated during construction, and results in an enlarged tip area. This paper investigates the contribution of these factors through a series of T-Z analyses applied to a well-documented, full-scale load testing case history.
Load Transfer Mechanisms of Tip Post-Grouted Drilled Shafts in Sand
Post-Grouted Drilled Shafts (PGDS) are a deep foundation system in which grout is injected at high pressure through the tip after the drilled shaft has been installed. Available field load tests show significant load and stiffness improvements of PGDS due to tip pressure grouting. The improved ultimate load capacity and stiffness of PGDS compared to conventional drilled shafts are believed to be related to the pre-stressing effect which the tip post grouting has on the shaft side friction due to the generated upward movement. It also is related to the grout bulb formed at the PGDS tip. This grout bulb pre-compresses the soil beneath the tip as well as any disturbed material generated during construction, and results in an enlarged tip area. This paper investigates the contribution of these factors through a series of T-Z analyses applied to a well-documented, full-scale load testing case history.
Load Transfer Mechanisms of Tip Post-Grouted Drilled Shafts in Sand
Ruiz, Miguel E. (Autor:in) / Pando, Miguel A. (Autor:in)
International Foundation Congress and Equipment Expo 2009 ; 2009 ; Orlando, Florida, United States
10.03.2009
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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