Numerical analysis on post-grouted drilled shafts: A case study at the Brazo River Bridge, TX SCIE SCOPUS

Cited 15 time in WEB OF SCIENCE Cited 22 time in Scopus
Title
Numerical analysis on post-grouted drilled shafts: A case study at the Brazo River Bridge, TX
Author(s)
Youn, Heejung; Tonon, Fulvio
Publication Year
2010-06
Abstract
This paper investigates the effects of post-grouting on the behavior of drilled shafts using a case study carried out at the Brazo River, Texas. Commercial finite element software, PLAXIS, was used to quantify the improvement of the tip resistance and side shear resistance of post-grouted drilled shafts (PGDS). The input material parameters of PLAXIS were initially estimated using CPT sounding results, and then the parameters were updated by calibrating the numerical results against full-scale STATNAMIC load test results. Based on the numerical analysis, the authors concluded that (1) the increase in total resistance of PGDS resulted from soil improvement at the shaft tip, (2) the apparent increase in side shear resistance resulted from side shear reversal that occurred during post-grouting, and (3) the apparent increase in the tip resistance of PGDS may be caused by stress relief of the grout. In addition, two approaches to estimate the resistance of PGDS were compared against numerical results. In this case study, the Axial Capacity Multiplier (ACM) approach over-predicted the total resistance whereas the Tip Capacity Multiplier (TCM) approach reasonably predicted the increase in total resistance. (C) 2010 Elsevier Ltd. All rights reserved.
ISSN
0266-352X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/4083
DOI
10.1016/j.compgeo.2010.01.005
Bibliographic Citation
COMPUTERS AND GEOTECHNICS, v.37, no.4, pp.456 - 465, 2010
Publisher
ELSEVIER SCI LTD
Keywords
Drilled shafts; Grouting; Post-grouting; Numerical analysis; Load transfer; Bearing capacity
Type
Article
Language
English
Document Type
Article
Publisher
ELSEVIER SCI LTD
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