TY - CHAP
T1 - Finite element analysis to simulate installation of Controlled Modulus Columns
AU - Amarathunga, T.
AU - Liyanapathirana, D. S.
AU - Fuentes, W.
AU - Leo, C. J.
AU - Hu, P.
PY - 2025
Y1 - 2025
N2 - Controlled Modulus Columns (CMC) are a ground improvement method based on column inclusions that have become popular in geotechnical practice due to their simplicity and efficiency in construction. They are installed in soil with a displacement auger that laterally displaces the surrounding soil. During the installation, CMC are associated with large soil deformations and highly nonlinear material behaviour. Hence, conventional small-strain finite element models are not effective in simulating the installation stages because the elements in the finite element model at the vicinity of the auger are grossly distorted. However, as a first step towards incorporating the installation effects of CMC in the column design, the adaptive remeshing finite element analysis procedure is performed in this study, which is available in ABAQUS/Standard and capable of performing a deep penetration problem while avoiding mesh distortion. The soil type considered in this study is sand and hence the constitutive behaviour is simulated using the Mohr-Coulomb Model. The load-carrying capacity of a controlled modulus column and the influence zone around a column during installation were determined considering the stress distribution and soil deformation around a column during installation.
AB - Controlled Modulus Columns (CMC) are a ground improvement method based on column inclusions that have become popular in geotechnical practice due to their simplicity and efficiency in construction. They are installed in soil with a displacement auger that laterally displaces the surrounding soil. During the installation, CMC are associated with large soil deformations and highly nonlinear material behaviour. Hence, conventional small-strain finite element models are not effective in simulating the installation stages because the elements in the finite element model at the vicinity of the auger are grossly distorted. However, as a first step towards incorporating the installation effects of CMC in the column design, the adaptive remeshing finite element analysis procedure is performed in this study, which is available in ABAQUS/Standard and capable of performing a deep penetration problem while avoiding mesh distortion. The soil type considered in this study is sand and hence the constitutive behaviour is simulated using the Mohr-Coulomb Model. The load-carrying capacity of a controlled modulus column and the influence zone around a column during installation were determined considering the stress distribution and soil deformation around a column during installation.
KW - Adaptive remeshing
KW - Bearing capacity
KW - Controlled modulus columns
UR - http://www.scopus.com/inward/record.url?scp=85217386851&partnerID=8YFLogxK
UR - https://go.openathens.net/redirector/westernsydney.edu.au?url=https://doi.org/10.1007/978-981-97-8225-3_13
U2 - 10.1007/978-981-97-8225-3_13
DO - 10.1007/978-981-97-8225-3_13
M3 - Chapter
AN - SCOPUS:85217386851
SN - 9789819782246
T3 - Lecture Notes in Civil Engineering
SP - 115
EP - 123
BT - Proceedings of the 5th International Conference on Transportation Geotechnics (ICTG) 2024, Volume 4: Applied Ground Improvement Methods
A2 - Rujikiatkamjorn, Cholachat
A2 - Xue, Jianfeng
A2 - Indraratna, Buddhima
PB - Springer
CY - Singapore
ER -