Evaluation of bearing capacity of precast piles with dissimilar post-grouting pressures

Seok-Jung Kim, Oh-Sung Kwon, Seok-Hyung Lee, Myoung-Mo Kim

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: Deep Foundations

ABSTRACT: A bored precast pile construction method is limited in controlling the diameter and the length of a pile. Nevertheless, this method has many advantages such as convenience of construction, shortening of construction period, and usefulness in management. Furthermore, because a precast pile is manufactured in a production facility it is easy to control the quality of the pile, and it is used widely in foundation structures for apartment building in Korea. Due to soil disturbance at the tip during the installation process of the bored pile, the end bearing capacity of the pile is not fully mobilized in common cases. To mitigate this problem, the Post-Grouting method has been extensively used worldwide. In this study, the effect of Post-Grouting was estimated by performing 3 cases of pile load tests on PHC (Pre-stressed High-strength Concrete) piles. The test piles were constructed both with and without Post-Grouting pressure and the grouting pressure was applied using two dissimilar pressures. By comparing the test results, the increment of the end bearing capacity due to the grouting was estimated quantitatively.

RÉSUMÉ: La méthode dune construction du tas précoulée est limité pour contrôler le diamètre et la longueur du tas. Néanmois, cette méthode a beaucoup davantages comme la convenance de construction, raccourcir la période de construction et lutilité dans la direction. De plus, car le tas précoulé est fabriqué par une production qui est facile de contrôler la qualité de tas, et il est utilisé largement dans la fondation structure de bâtiments en Corée. Dans les cas communs, cest à cause du sol dérangement à la pointe, pendant la processus dinstalation du tas précoulé nétait pas entièrement mobilisé. Pour adoucir cette problème, la méthode de ost-Grouting est utilisé considérablement dans le monde entier. Dans cette étude, leffet de Post-Grouting est estimé par exécuter les trois cas de tas pour tester le PHC (Pre-stressed High-strength Concrete) tas. Les tas pour tester sont construits avec et sans la pression de Post-Grouting et la pression de Grouting a été appliqué en utilisant deux dissemble pressions. En comparant les résultats du test, laugmentation du fin capacité

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Cite this article:
Seok-Jung Kim; Oh-Sung Kwon; Seok-Hyung Lee; Myoung-Mo Kim (2011) Evaluation of bearing capacity of precast piles with dissimilar post-grouting pressures in GEO2011. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GEO11Paper598,author = Seok-Jung Kim; Oh-Sung Kwon; Seok-Hyung Lee; Myoung-Mo Kim ,title = Evaluation of bearing capacity of precast piles with dissimilar post-grouting pressures ,year = 2011}