Numerical Study of the Effect of Verification Core Hole on the Point Bearing Capacity of Drilled Shafts SCIE SCOPUS

Cited 1 time in WEB OF SCIENCE Cited 1 time in Scopus
Title
Numerical Study of the Effect of Verification Core Hole on the Point Bearing Capacity of Drilled Shafts
Author(s)
Youn, Heejung; Tonon, Fulvio
Publication Year
2010-09
Abstract
This paper presents a numerical investigation of the effect of a verification core hole on the point bearing capacity of drilled shafts installed in clay shales. The verification core extracted at the shaft tip may reduce the point bearing capacity of drilled shafts as a result of degradation of clay shales and imperfect core hole infill. Finite-element analyses were conducted using the Mohr-Coulomb model with total stress material parameters estimated from laboratory tests. A series of load-displacement curves was calculated for 1 cycle of air drying and wetting; different drying durations and different core hole conditions were considered; and the point bearing capacity was determined at 3 and 5% shaft diameter displacements. The numerical analyses indicate that the point bearing capacity of drilled shafts with a verification core hole does not decrease for most cases, and the maximum reduction merely reaches 5%. Recommendations are made to reduce the effect of the verification core extracted at the shaft bottom during construction.
ISSN
1090-0241
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/4044
DOI
10.1061/(ASCE)GT.1943-5606.0000333
Bibliographic Citation
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, v.136, no.9, pp.1287 - 1297, 2010
Publisher
ASCE-AMER SOC CIVIL ENGINEERS
Subject
DESIGN METHOD; ROCK
Keywords
Verification core hole; Drying-duration; Numerical analysis; Drilled shafts; Clay shales; Point bearing capacity; Degradation
Type
Article
Language
English
Document Type
Article
Publisher
ASCE-AMER SOC CIVIL ENGINEERS
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