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Post Grouted Drilled Shafts - A Comprehensive History from Texas
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Post Grouted Drilled Shafts - A Comprehensive History from Texas

Phil King, Americo Fernandez and Miguel Pando
01 Jan 2009

Abstract

Post-Grouted Drilled Shafts (PGDS) are a deep foundation system in which grout is injected at pressure through the tip after the drilled shaft been installed. The improved ultimate load and stiffness of PGDS compared to conventional shafts are believed to be related to the effect which the tip post grouting has on the side friction due to the generated upward and the grout bulb formed at the PGDS tip which in an enlarged tip area and also pre-compresses soil beneath the tip as well as any disturbed generated during construction. This paper results of a comprehensive full-scale load test at the clay and sand sites of the well Texas A&M NGES. The test program involved static load tests as well as O-cell tests on PGDS and conventional drilled shafts installed and under similar conditions.

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