Bak, J. H., Lee, K. C, Choi, B. H. and Kim, D. W. (2018). "Analysis of helical pile
behavior in sands varying helix pitch based on numerical analysis results." <italic>Journal
of the Korean Geosynthetics Society</italic>, Vol. 17, No. 4, pp. 29-40 (in Korean).
Bolin, H. W. (1941). "The pile efficiency formula of the Uniform Building Code." <italic>Building
Standards Monthly</italic>, Vol. 10, No. 1, pp. 4-5.
Bowels, J. E. (1996). <italic>Foundation analysis and design</italic>, The Mcgraw-
Hill Companies, Singapore.
Das, B. M. (2015). <italic>Principles of foundation engineering</italic>, Cengage
learning, Boston, Massachusetts, U.S.
Deb, P. and Pal, D. S. K. (2016). "An experimental and numerical study on behaviour
of single pile and group of piles in layered soils under vertical load." <italic>International
Journal of Engineering Research & Technology</italic>, IJERT, Vol. 5, No. 3, pp. 200-208.
10.17577/IJERTV5IS030269
Franke, E. (1989). "Co-report to discussion, session 13: large-diameter piles." <italic>12th
International Conferences on Soil Mechanics and Foundation Engineering</italic>, Rio
De Janeiro.
Ghasemzadeh, H., Tarzaban, M. and Hajitaheriha, M. M. (2018). "Numerical analysis
of pile-soil-pile Interaction in pile groups with batter piles." <italic>Geotechnical
and Geological Engineering</italic>, Vol. 36, No. 4, pp. 2189-2215.
10.1007/s10706-018-0456-4
Gowthaman, S. and Nasvi, M. C. M. (2018). "Three-dimensional numerical simulation
and validation of load-settlement behaviour of a pile group under compressive loading."
<italic>Engineer</italic>, Vol. 51, No. 1, pp. 9-21.
10.4038/engineer.v51i1.7283
Han, F., Salgado, R., Prezzi, M. and Lim, J. H. (2019). "Axial resistance of nondisplacement
pile groups in sand." <italic>Journal of Geotechnical and Geoenvironmental Engineering</italic>,
Vol. 145, No. 7, 04019027.
10.1061/(ASCE)GT.1943-5606.0002050
Kim, S. H., Jeon, Y. J. and Lee, C. J. (2015). "A study on the effect of tunnelling
to adjacent single piles and pile groups considering the transverse distance of pile
tips from the tunnel." <italic>Journal of Korean Tunnelling and Underground Space
Association</italic>, Vol. 17, No.6, pp. 637-652 (In Korean).
10.9711/KTAJ.2015.17.6.637
Kim, S. H., Jeon, Y. J. and Lee, C. J. (2016). "A study on the behaviour of single
piles and pile groups in consolidating ground from coupled consolidation analyses."
<italic>Journal of the Korean Geo- Environmental Society</italic>, Vol. 17, No. 7,
pp. 15-25 (In Korean).
10.14481/jkges.2016.17.7.15
Kim, T. S. (2014). <italic>Contact analysis using Abaqus</italic>, BB Media, Seoul,
Republic of Korea (In Korean).
Lee, C. J. (2009). "The Influence of reduction of vertical stress on the behaviour
of piles subjected to negative skin friction." <italic>Journal of the Korean Society
of Civil Engineers</italic>, KSCE, Vol. 29. No. 1C, pp. 33-39 (in Korean).
Moayedi, H., Nazir, R., Ghareh, S., Sobhanmanesh, A. and Tan, Y. C. (2018). "Performance
analysis of a piled raft foundation system of varying pile lengths in controlling
angular distortion." <italic>Soil Mechanics and Foundation Engineering</italic>, Vol.
55, No. 4, pp. 265-269.
10.1007/s11204-018-9535-z
Nowkandeh, M. J. and Choobbasti, A. J. (2021). "Numerical study of single helical
piles and helical pile groups under compressive loading in cohesive and cohesionless
soils." <italic>Bulletin of Engineering Geology and the Environment</italic>, pp.
1-23.
10.1007/s10064-021-02158-w
O'Brien, A. S. (2012). <italic>Pile-group design, In ICE manual of geotechnical engineering</italic>,
Thomas Telford Ltd., London, U.K.
Pack, J. S. and Jeong, S. S. (2018). "Estimation of lateral dynamic p-multiplier of
group pile using dynamic numerical analysis results." <italic>Journal of the Korean
Society of Civil Engineers</italic>, KSCE, Vol. 38, No. 4, pp. 567-578.
Seiler, J. F. and Keeney, W. D. (1944). "The efficiency of piles in groups." <italic>Wood
Preserving News</italic>, Vol. 22, No. 11, pp. 109-118.
SIMULIA. (2016). <italic>ABAQUS 6.16 Scripting User's Manual</italic>, SIMULIA, Maastricht,
Netherlands.
Teramoto, S., Niimura, T., Akutsu, T. and Kimura, M. (2018). "Evaluation of ultimate
behavior of actual large-scale pile group foundation by in-situ lateral loading tests
and numerical analysis." <italic>Soils and Foundations</italic>, Vol. 58, No. 4, pp.
819-837.
10.1016/j.sandf.2018.03.011
Tomlinson, M. J. and Woodward, J. (2008). <italic>Pile design and construction</italic>,
Taylor & Francis, Oxfordshire, U.K.
Wang, C., Liang, F. and Yu, X. (2017). "Experimental and numerical investigations
on the performance of sacrificial piles in reducing local scour around pile groups."
<italic>Natural Hazards</italic>, Vol. 85, No. 3, pp. 1417-1435.
10.1007/s11069-016-2634-0