Logo image
Load Transfer Mechanisms of Tip Post-Grouted Shafts in Sand
Book

Load Transfer Mechanisms of Tip Post-Grouted Shafts in Sand

Miguel Ruiz and Miguel Pando
01 Jan 2009

Abstract

Post-Grouted Drilled Shafts (PGDS) are a deep system in which grout is injected at high through the tip after the drilled shaft has been Available field load tests show significant load stiffness improvements of PGDS due to tip grouting. The improved ultimate load capacity and of PGDS compared to conventional drilled shafts believed to be related to the pre-stressing which the tip post grouting has on the shaft side due to the generated upward movement. It also is to the grout bulb formed at the PGDS tip. This bulb pre-compresses the soil beneath the tip as as any disturbed material generated during and results in an enlarged tip area. This paper the contribution of these factors through a of T-Z analyses applied to a well-documented, load testing case history.

Metrics

14 Record Views
33 citations in Scopus

Details

Logo image